Jobs Fullstack

As a Junior+ Full Stack Developer, you will work with experienced developers to develop, maintain, and improve both backend and frontend parts of our web applications. You will be involved in implementing new features, fixing bugs, working with databases and APIs, and improving existing projects.

This position is a great opportunity for a developer who has practical experience with PHP/Laravel and frontend technologies and wants to continue developing as a Full Stack Developer.

Responsibilities

• Develop and maintain backend and frontend functionality for company projects
• Implement new features and improvements based on project requirements
• Work with PHP and Laravel to develop server-side functionality
• Develop and maintain frontend components using JavaScript, HTML, and CSS
• Work with MySQL databases and write SQL queries
• Integrate external APIs and third-party services
• Develop and maintain REST API integrations
• Debug and fix issues on both backend and frontend
• Write clean, readable, maintainable, and reusable code
• Work with Git and follow the team’s development workflow
• Participate in code reviews and technical discussions
• Provide ongoing support for existing applications
• Work with Linux systems and basic server-side tasks
• Collaborate with backend developers, frontend developers, QA, designers, and other team members
• Follow development tasks and priorities defined by the team lead or manager
• Research and learn new technologies and development approaches

Requirements

• 1+ year of commercial or practical experience in web development
• Good knowledge of PHP
• Basic to intermediate experience with Laravel
• Good knowledge of SQL
• Good understanding of JavaScript
• Good knowledge of HTML and CSS
• Experience with Git
• Basic knowledge of Linux and Bash commands
• Understanding of REST APIs
• Basic understanding of MVC and OOP principles
• Ability to work with existing code and understand unfamiliar projects
• Ability to independently research solutions and learn new technologies
• Attention to detail and responsible attitude toward tasks
• Ability to work independently and as part of a team
• Good problem-solving and time-management skills
• Intermediate English or higher
• On-site work from office in Kyiv or in Tirana

Would be a plus

• Experience with React or another frontend framework
• Experience with Bootstrap or other CSS frameworks
• Experience with WordPress
• Experience with Google APIs / Google Sheets API
• Experience with Docker
• Basic knowledge of Nginx or Apache
• Experience with Laravel queues, jobs, events, and scheduled tasks
• Understanding of database migrations and optimization
• Experience with PHPUnit or other testing frameworks
• Basic knowledge of CI/CD
• Experience with Linux server administration
• Understanding of responsive web design
• Experience with AJAX and asynchronous requests

What we offer

• Opportunity to work on real commercial projects
• Work on both backend and frontend parts of web applications
• Mentorship and support from experienced developers
• Opportunity to grow into a Middle Full Stack Developer
• Experience with APIs, databases, integrations, and automation
• Opportunity to work with modern development tools and technologies
• Friendly and collaborative development environment

We are looking for a AI Developer (Full stack / AI Automation) to join our team

What You Will Do:

• Develop and implement AI-driven solutions and AI agents to automate business processes.
• Build backend services using Node.js to integrate AI models into products.
• Work with databases (SQL / NoSQL) for data storage and processing.
• Deploy and manage services using Docker.
• Develop systems using different LLM providers
• Build and optimize AI agent architectures and automation pipelines.
• Create agency multi-agent systems on different harnesses
• Work in Linux environments (Ubuntu) for development and deployment.
• Analyze user needs and design AI solutions to solve user problems.

What We Offer

• 21 days of paid leave per year
• 7 days of sick leave annually
• Health insurance
• English-speaking clubs
• Corporate events and team-building activities
• Long-term cooperation
• Annual performance review
• All necessary technical equipment provided
• Hybrid work format: 4 days in the office, 1 day fully remote

Hiring Process

1. Initial interview
2. Test task
3. Interview with a manager
4. Final interview with CTO.

Required Experience to Succeed in This Role:

• Strong experience with Node.js development.
• Experience working with databases (SQL or NoSQL).
• Ability to write clean, maintainable, and scalable code refactoring.guru
• Understanding of AI concepts, LLMs, or AI agents.
• Experience building and integrating REST APIs.
• Experience with Docker.
• Comfortable working in Linux (Ubuntu) environments.
• Ability to write clean, maintainable, and scalable code.
• English (spoken and written).
• Location - Kyiv

We are looking for a strong Full-Stack Developer to join LITSLINK, a subsidiary of WOW-HOW Studio, and work on a variety of client and internal products.
 

This role is a great fit for an engineer who enjoys working across the full development cycle, quickly adapting to new domains and technologies, and actively using modern AI tools to accelerate software development.
 

About LITSLINK

LITSLINK is a software development company delivering custom software solutions for international clients across different industries and domains.

Our engineers work on a wide range of products — from early-stage prototypes and MVPs to production-ready systems — using modern technologies and an AI-first approach to software development.
 

What you will do

• Develop and maintain web applications across frontend and backend.
• Participate in the full software development lifecycle — from technical discovery and estimation to implementation and delivery.
• Contribute to architecture and technical decisions.
• Participate in technical discussions and project estimations.
• Work on client products across different domains and technical environments.
• Contribute to internal LITSLINK products and initiatives.
• Collaborate with developers, PMs, designers, QA and other team members.
• Use AI-assisted development tools as an integral part of your engineering workflow.
• Rapidly prototype, validate and implement technical solutions.

Tech stack

Our primary stack includes React, Node.js, JavaScript/TypeScript.

We are also open to strong Full-Stack Engineers with experience in other modern technologies.
 

It will be a plus if you have experience with:

• Next.js
• Vue.js
• React Native
• NestJS
• PostgreSQL
• Supabase
• Firebase
• AWS
• Vercel
• Ruby
• Solidity
• Other modern frontend and backend technologies

AI-first development

AI-assisted development is an integral part of our engineering workflow — not just an occasional tool for searching or generating snippets.

We expect engineers to actively use AI tools for:

• implementation and feature development;
• prototyping and experimentation;
• refactoring and improving existing code;
• debugging and troubleshooting;
• technical research;
• repetitive engineering tasks.
   

We work with tools such as Cursor, Claude Code, GitHub Copilot, ChatGPT and other AI coding assistants/agents.

A strong understanding of how to effectively use AI to accelerate development while maintaining code quality is a significant advantage.

What we are looking for

• Strong commercial software development experience.
• Solid Full-Stack background.
• Strong understanding of frontend and backend development principles.
• Experience with React and Node.js or a comparable modern stack.
• Strong JavaScript/TypeScript skills.
• Ability to understand a product or technical problem and independently propose a solution.
• Good understanding of architecture, APIs, databases and integrations.
• Ability to estimate technical tasks and evaluate different approaches.
• Experience with modern AI development tools.
• Ability to quickly learn new technologies and work outside a narrow technology stack.
• Product-oriented mindset and strong problem-solving skills.
• Ownership and ability to work independently.
• Good communication skills.
• English sufficient for technical communication and working with international teams.

Will be a plus

• Experience in outsourcing, consulting or product development.
• Experience with technical discovery or presales.
• Experience working on several products or in different domains.
• Cloud and deployment experience.
• Mentoring or knowledge-sharing experience.
• Broad technical background beyond one primary stack.

What we offer

• Full-time, long-term cooperation.
• Opportunity to work on different international and internal products.
• Ability to influence technical decisions.
• Exposure to different technologies, industries and business domains.
• AI-first engineering environment.
• Opportunity to work on products from early-stage ideas and prototypes through to production.
   

Location: Remote / Ukraine
Employment: Full-time
 

If you enjoy solving problems rather than being limited to a single stack, quickly adapting to new technical contexts, and using AI to build software more efficiently, we’d love to hear from you.

We are looking for you!

As we continue to shape the future of AdTech and MarTech with groundbreaking web applications, we're seeking a strong Full-stack Engineer with unparalleled expertise in Java and Angular. The project focus is to extend the existing CAPI (Conversion API) platform by developing additional connectors to advertising and technology platforms. CAPI takes advertiser conversion data from AWS S3, transforms it into the format required by each destination, and sends it through the destination platform’s API for measurement and optimization. The current platform already supports Google and Meta; the project will add Amazon as the highest-priority integration, followed by OpenAI and other destinations. The focus is on extending the existing platform rather than rebuilding the upstream data pipeline.
If you're a seasoned professional, we want you on our team.

Contract type: Gig contract.

Skills and experience you can bring to this role!

Qualifications & Experience:

• 5+ years of commercial experience in software development;
• Strong Java Core and Spring Framework work experience (Core, Security, Data, Boot);
• Knowledge of OOP/OOD, architecture, and design patterns;
• Experience with relational databases (MySQL would be a plus);
• AWS experience: API Gateway, CloudFront, S3, RDS, Lambda, EC2, VPC, ElastiCache, Kinesis, DynamoDB;
• Curiosity about current tech trends and developments;
• Solid experience with HTML, CSS, and JavaScript;
• Extensive experience with Angular (version 17+) and its ecosystem; 
• Hands-on experience with Scrum-based Software Development Life Cycles (SDLC);
• Comprehensive experience using Git/GitHub for version control;
• Experience creating unit tests for web components using tools like Cypress, Jasmine, or Karma;
• Strong communication skills;
• Good English skills and willingness to speak directly with the customer.

Would be a plus:

• Experience with developing high-load systems and utilization of message queue engines such as Apache Kafka, Amazon SQS, etc.;
• Experience working with Terraform, Elasticsearch, REST APIs, Apache Druid, TypeScript, SQL.

What impact you’ll make

• Participate in requirement analysis, research implementation ways and possibilities;
• Proactively engage in research, discussions and decisions on software architecture and internal coding style, including architecture, process, and other standards establishments;
• Design, develop and maintain efficient, reusable and reliable code;
• Write unit and integration tests;
• Collaborate with the team members and customer representatives; and
• Perform code reviews and share best practices with colleagues.

What you’ll get

Regardless of your position or role, we have in place a wide array of benefits, including flexible working (hybrid/remote models) and generous time-off policies (unlimited vacations, sick and parental leaves) to make it easier for all people to thrive and succeed at Star. On top of that, we offer an extensive reward and compensation package, intellectually and creatively stimulating space, health insurance and unique travel opportunities.

Your holistic well-being is central at Star. You'll join a warm, vibrant multinational environment filled with impactful projects, career development opportunities, mentorship and training programs, fun sports activities, workshops, networking and outdoor meet-ups.

Position: Senior Full-Stack Engineer — Solana Low-Latency Copy-Trading (Node.js + React)

Level: Senior

Required Hard Skills

• 6+ years of Software Engineering experience
• Strong commercial experience with Node.js
• Strong experience with TypeScript (strict mode)
• Strong experience with React + TypeScript
• Experience with backend frameworks such as Nest.js, Express.js, Koa.js
• Strong understanding of React, including Hooks, Context, rendering behavior, and performance optimization
• Strong experience with state management tools such as Redux, MobX, Zustand, Recoil, or similar
• Strong software design knowledge: OOD, FP, design patterns, SOLID principles
• Practical hands-on experience with AI-assisted development tools such as Claude Code, Cursor, or similar
• Experience building low-latency, high-throughput, highly concurrent systems (real-time processing, hundreds+ of parallel operations)
• Experience working with external APIs and third-party data providers
• Strong understanding of RESTful APIs and GraphQL APIs
• Advanced experience with SQL databases, especially PostgreSQL (transactions, locking, idempotency)
• Experience with database performance optimization, indexing, query optimization, and handling large datasets
• Experience with async / batch processing, scheduled jobs, background workers, queues, retries, throttling, and rate-limit handling
• Hands-on experience with job / message queues such as BullMQ, Redis Streams, Kafka, RabbitMQ, Amazon SQS/SNS, or similar
• Experience with Docker and CI/CD processes
• Experience with AWS or similar cloud platforms (GCP, Azure)
• Experience building systems that require data validation, consistency checks, idempotency, and crash-recovery safeguards
• Understanding of trading, fintech, blockchain, or data-intensive financial systems
• Knowledge of Agile development practices, preferably SCRUM
• Proficient understanding of Git

Required Blockchain / Solana / Copy-Trading Experience

• Solid understanding of Solana internals: transactions, instructions, accounts, blocks/slots, commitment levels (processed / confirmed / finalized), blockhash lifetime, and reorg handling
• Hands-on experience with low-latency Solana execution / trading bots — landing transactions competitively (same-slot / “block-0”), priority fees, and MEV-aware submission
• Experience with real-time Solana data streaming: Yellowstone gRPC (Triton Dragon’s Mouth / Helius LaserStream) and/or shred-level feeds such as Jito ShredStream (awareness of DoubleZero Edge a plus)
• Experience with transaction submission & landing infrastructure: Jito (Block Engine / bundles / tips), Helius Sender, SWQoS (stake-weighted QoS), and specialist senders (0slot / Nozomi / bloXroute)
• Experience with blockchain data / RPC providers such as Helius, Triton, QuickNode, Alchemy, or similar, including multi-provider failover and rate-limit handling
• Familiarity with Pump.fun / PumpSwap: bonding-curve mechanics, AMM pricing, and building instructions from an on-chain IDL
• Understanding of trading metrics: entry/exit, market cap, slippage, hit rate, P&L, and per-position / portfolio risk
• Experience with crypto trading platforms, copy-trading systems, DEX / on-chain execution, or wallet automation
• Experience with secure key management at scale (HD wallet derivation, in-memory signing, secrets isolation) and capital-isolation / fail-safe design
• Experience with trading systems, bots, DeFi or high-throughput financial systems strongly preferred.

Would Be Great

• Experience writing performance-critical services in Rust (a native signing / execution hot-path is on the roadmap)
• Experience running leader-proximate bare-metal / colocation (Frankfurt / Amsterdam) and host/network tuning for latency
• Experience with Jito bundles, durable nonces, and transaction idempotency / reconciliation against chain
• Experience integrating CEX withdrawal APIs (Binance / MEXC / KuCoin) for programmatic funding
• Experience with observability tools such as Prometheus, Grafana, Datadog, Sentry, ELK, OpenTelemetry, or similar
• Experience designing systems with fallback providers, retry logic, throttling, circuit breakers, and API-usage monitoring
• Experience building HFT / MEV / market-making or other latency-sensitive financial systems

Responsibilities

• Build and maintain full-stack features for ARES, a private copy-trading bot for the Pump.fun / Solana ecosystem
• Design and implement the block-0 execution engine: real-time target detection, pre-trade gating, and same-slot buy submission across multiple routes
• Integrate low-latency detection (Yellowstone gRPC / Jito ShredStream) and submission (Helius Sender / Jito bundles / SWQoS / specialist senders) with multi-provider failover
• Build the wallet lifecycle & custody layer: provisioning isolated child-wallet pairs per task, funding, profit skimming, and drain-to-vault — under strict capital isolation
• Implement position & exit management (rule-driven take-profit, sell-after-inactivity, chase-sells) and the per-task kill-switch / risk protection
• Implement idempotency, durable intent, and crash / reorg reconciliation so no trade is ever double-executed at scale
• Build the operator dashboard (React): copy-task configuration, live task & health monitoring, controls (pause / resume / kill), and global safety limits
• Construct Pump.fun bonding-curve buys from the live IDL, with graduation gating and pre-trade safety checks
• Design controlled concurrency, batching, throttling, retries, and rate-limit handling to sustain 1,000+ tasks / ~2,000+ wallets
• Optimize the detect → decide → sign → submit → land path to maximize block-0 landing rate (KPI #1) and uptime / failover (KPI #2)
• Implement secure key management (HD derivation, in-memory signing) and secrets handling; enforce fail-safe defaults and an explicit kill switch on every execution path
• Collaborate with product, engineering, and domain stakeholders on trade-offs across latency, cost, and reliability; participate in architecture discussions
• Write clean, secure, maintainable, well-tested code (unit + e2e); conduct code reviews; maintain documentation; support production readiness
• Monitor system reliability, execution latency and landing rate, provider health, and data quality

English Level

Upper-Intermediate or higher

We are looking for a Senior Full-Stack Developer to join a UK-based digital healthcare company that combines digital tools with clinical expertise to deliver medical and wellbeing services through its online platform.

This role is backend-weighted: you will build ASP.Net Core services that power patient-facing products, and also work on the React frontend that consumes them.

What you'll do

• Design and build ASP.Net Core Web APIs and the data layer behind them (Entity Framework Core, SQL Server);
• Implement background processing: queues, scheduled jobs, and event-driven messaging;
• Build and maintain frontend features in React and TypeScript;
• Work with Azure services across the stack: App Service, Storage Queues, Event Grid, SignalR;
• Cover your work with tests on both sides: xUnit and Moq on the backend, Vitest or Jest and Playwright on the frontend;
• Take part in code review, architectural decisions, and CI/CD improvements.

Requirements

• 5+ years of commercial development experience;
• Strong C# and .NET: ASp.Net Core Web APIs, Entity Framework Core, SQL Server;
• Solid experience designing REST APIs;
• Practical experience with background processing: queues, scheduled jobs, event-driven messaging;
• Strong React and TypeScript: hooks, React Query or similar, component libraries such as MUI;
• Hands-on experience with Azure (App Service, Storage Queues, Event Grid, SignalR);
• Git, Docker, and CI/CD (GitLab);
• Testing: xUnit and Moq, Vitest or Jest, Playwright;
• Good spoken and written English.

Nice to have

• Node.js and NestJS;
• MongoDB, Redis;
• Nx monorepo, Redux Toolkit;
• Terraform;
• Datadog or similar observability tooling.

Our Customer:

Our customer develops specialized software products for professional business workflows. The engineering team works on established production applications and is looking for a full-stack engineer who can contribute across both frontend and backend development.

Your Tasks:

• Develop and maintain full-stack applications across React/TypeScript frontend and C# backend.
• Work on medium and large-scale production applications throughout the development lifecycle.
• Develop and maintain frontend functionality using React, including both Hooks and class-based components.
• Build and maintain backend functionality using ASP.NET MVC and Web API on the classic .NET Framework.
• Investigate, debug, trace, and resolve complex frontend and server-side issues.
• Apply software engineering principles, design patterns, and clean development practices.
• Quickly learn and adopt new technologies when required.
• Work independently while contributing across the full technology stack.

Required Experience and Skills:

• 3+ years of experience working with medium or large-scale React applications.
• Strong knowledge of React Hooks and classic class-based components.
• Strong TypeScript skills.
• Good understanding of core web technologies, including JavaScript, XHTML, and CSS.
• Production experience with Redux, Redux Saga, and Immutable.js.
• Strong frontend debugging and problem analysis skills.
• 2+ years of experience working with medium or large ASP.NET MVC or Web API applications.
• Hands-on experience with the classic .NET Framework; working experience with .NET Core is not required, but solid knowledge of .NET Core is required.
• Strong knowledge of C#, OOP, SOLID principles, design patterns, reflection, and algorithms.
• Strong understanding of XML and JSON serialization.
• Ability to debug, trace, and resolve complex server-side issues.
• Strong ability to learn new technologies quickly and work independently.
• University degree in Computer Science or a related field, or equivalent industry experience.
• Excellent English.

Would Be a Plus:

• Experience with AWS services such as SQS, EKS, and Fargate.
• Experience with cloud-oriented systems.
• Experience with Kubernetes.
• Experience with Node.js.
• Knowledge of nw.js or similar technologies.

Working conditions

• 5-day working week, 8-hour working day;
• Remote work.

Our Customer:

Our client is a global technology company developing an advanced cloud platform for AI-powered voice communication. Their product enables organizations to build, integrate, and deploy intelligent voice services by combining modern AI technologies, large language models, and enterprise-grade communication infrastructure. The engineering team focuses on creating scalable, cloud-native SaaS solutions that process real-time interactions while maintaining high performance, reliability, and security.

Your tasks:

• Design and develop new product features across both backend and frontend components.
• Build scalable backend services using modern .NET technologies.
• Develop responsive Single Page Applications using the latest React ecosystem.
• Design and integrate REST and GraphQL APIs.
• Work with relational and NoSQL databases while ensuring data consistency and performance.
• Participate in designing microservices-based architecture and distributed systems.
• Collaborate with product managers, architects, and other engineers throughout the entire development lifecycle.
• Leverage AI-assisted development tools (such as Claude, GitHub Copilot, etc.) to improve productivity while maintaining full
• ownership and understanding of the implementation.
• Write clean, maintainable, and well-tested code following modern engineering best practices.
• Contribute to architecture discussions, code reviews, and continuous product improvements.

Required experience and skills:

• 3+ years of commercial experience in Full Stack development.
• Strong experience with modern C#, .NET Core, and ASP.NET Core.
• Solid hands-on experience with the latest versions of React, including Functional Components, Hooks, and modern state management.
• Experience building Single Page Applications (SPA).
• Strong knowledge of Entity Framework.
• Experience designing and developing microservices-based applications.
• Practical experience with REST APIs and GraphQL.
• Experience with SQL and NoSQL databases (SQL Server, PostgreSQL, MongoDB, or similar).
• Good understanding of asynchronous programming, distributed systems, and cloud-native application development.
• Experience using AI-assisted development tools (Claude, GitHub Copilot, or similar) as part of the software development workflow.
• Ability to explain architectural decisions, coding approaches, and engineering best practices independently, without relying solely on AI-generated code.
• Strong analytical thinking, problem-solving skills, and ownership mindset.
• Experience working in Agile development environments.
• Upper-Intermediate (B2) or higher level of English.

Would be a plus:

• Experience with Docker and CI/CD pipelines.
• Experience with Azure and Azure Kubernetes Service (AKS).
• Knowledge of cloud-native SaaS architecture.
• Experience with high-load or real-time communication systems.
• Familiarity with modern software architecture patterns and system design.
• Experience participating in technical design discussions and architectural decision-making.

Working conditions

• 5-day working week, 8-hour working day;
• Remote work.

Builds and evolves data-heavy product interfaces on a TypeScript stack, owning features end to end from the API layer through to the UI, with a focus on usability and performance under real data volumes.
 

Key Responsibilities:
Build and maintain data-heavy product interfaces using Angular and TypeScript
Develop backend services and APIs with NestJS
Own features end to end — data model, API contract, UI implementation and tests
Implement complex tables, filtering, aggregation and visualisation that stay performant at scale
Design and maintain state management and component structure as the product grows
Write and maintain automated tests, and participate in code review and engineering standards
Work with product and design to shape how complex data is presented to users
 

Requirements:
6+ years of commercial full-stack experience
Fluent English
Strong TypeScript expertise
Recent production experience with modern Angular (not legacy AngularJS only)
Hands-on NestJS backend experience
Proven experience building data-heavy interfaces — complex tables, filtering, visualisation and performance optimisation
Solid REST API design and integration experience
Strong Git, pull request and code review practice
Ability to work independently and take ownership of delivery
 

Nice to Have:
Cypress or equivalent E2E testing experience
State management at scale (NgRx or similar)
RxJS and reactive programming patterns
Experience with design systems and reusable component libraries
Experience with AI-assisted development tools
Experience in the energy sector
Availability to work a Sunday–Thursday working week

!!Locations: Columbia, Argentina, Brazil

About the role

We are looking for an experienced AI-Pilled Full Stack Technical Lead to join our engineering team and contribute to the development of modern, scalable, and high-quality web applications. You will work across both backend and frontend development, using Node.js for backend services and React, TypeScript, and JavaScript for frontend applications. You will collaborate closely with engineers, designers, QA engineers, and product stakeholders to build reliable, user-friendly, and maintainable solutions.

Skills & Experience

• Experience using AI coding assistants (e.g., Claude Code, Codex, Cursor, Copilot) as part of the daily development workflow.
• 5+ years of experience in a Technical Lead / Tech Lead role, providing technical guidance and supporting engineering teams.
• Strong knowledge of Node.js and experience building production-ready backend applications and services.
• Hands-on experience with Node.js frameworks.
• Strong experience designing, developing, and integrating REST APIs.
• Good understanding of backend architecture, application design, separation of concerns, and scalable development practices.
• Experience working with relational databases such as PostgreSQL or MySQL, including data modeling and query optimization.
• Strong knowledge of JavaScript and TypeScript, including asynchronous programming, promises, modules, and modern JavaScript features.
• Strong hands-on experience with React, including components, hooks, routing, forms, and state management.
• Solid knowledge of HTML5 and CSS3, including semantic HTML, responsive design, and modern layouts.
• Good understanding of frontend architecture, component-based development, reusable solutions, and state management.
• Experience with authentication and authorization mechanisms and secure API development.
• Experience with unit and integration testing across backend and frontend components.
• Good understanding of application performance optimization and scalability.
• Experience with Git, package managers, development tools, and modern build tools.
• Good understanding of web security principles and common application security risks.
• Strong debugging and problem-solving skills, with the ability to identify root causes across the full application stack.
• Ability to work independently, analyze technical requirements, and make well-reasoned technical decisions.
• Strong communication and collaboration skills.
• English level: Advanced.

Responsibilities:

• Develop and maintain modern, scalable full-stack applications using Node.js, JavaScript, TypeScript, and React.
• Design, build, and maintain backend services and REST APIs using Node.js.
• Develop reusable, maintainable, and well-structured frontend components and user interfaces.
• Design and implement application logic, data models, API integrations, and backend workflows.
• Integrate frontend applications with backend services, including authentication, data handling, validation, and error management.
• Work with relational and/or NoSQL databases, including data modeling, querying, and performance optimization.
• Translate product and technical requirements into reliable end-to-end solutions.
• Collaborate closely with Engineers, QA Engineers, Designers, and Product teams.
• Participate in technical discussions, solution design, estimation, architecture decisions, and code reviews.
• Write clean, maintainable, testable, and well-structured code following engineering best practices.
• Develop and maintain unit, integration, and end-to-end tests.
• Identify, troubleshoot, and resolve backend and frontend performance and functionality issues.
• Optimize application performance, API response times, database queries, rendering, and loading times.
• Contribute to application architecture, development standards, and continuous improvement of engineering practices.
• Use AI coding tools effectively as part of the daily engineering workflow to accelerate development, debugging, testing, and code quality.

Important: We expect AI tools to be part of your daily workflow. Candidates who primarily rely on traditional development approaches and do not actively use modern AI coding tools are unlikely to be a good fit for this role.

Are you an AI-driven Full Stack Engineer who uses modern AI tools to build faster, ship faster, and solve complex problems more efficiently?
 

At GT Protocol, we're not looking for traditional developers. We're building an AI-first engineering culture where AI is deeply integrated into the development workflow — from architecture and coding to testing, debugging, research, and product delivery.
 

We are looking for a Senior Full Stack Engineer who embraces AI-assisted development and understands how to leverage modern AI tools to maximize productivity and focus on solving real business problems rather than spending time on repetitive tasks.
 

About the Role

You will be working on GT Protocol's AI-powered trading and investment platform, helping build products used by thousands of users across Web3, CeFi, and DeFi ecosystems.
 

This role combines backend development, frontend development, AI integrations, trading infrastructure, blockchain analytics, real-time systems, and modern AI-driven engineering practices.
 

You will participate in designing and building scalable products while actively utilizing AI development tools as part of your daily workflow.
 

What We Expect from an AI-Driven Engineer

• Comfortable using AI coding assistants as a core part of the development process
• Experience working with tools such as Cursor, Claude Code, ChatGPT, Gemini, Copilot, Windsurf, or similar solutions
• Ability to effectively use AI for coding, architecture exploration, debugging, code reviews, documentation, testing, and research
• Strong focus on shipping results rather than maximizing manual coding hours
• Curiosity and willingness to continuously adapt to new AI-driven development workflows
• Understanding that AI is a productivity multiplier, not a replacement for engineering fundamentals
   

We believe the future belongs to engineers who can combine strong technical skills with the ability to leverage AI effectively. Our goal is to build a team that operates significantly faster than traditional software teams while maintaining high engineering standards.
 

Responsibilities and Duties

• Participate in the design, development, and maintenance of a sophisticated AI-powered trading platform serving thousands of users worldwide
• Develop and maintain backend services using Python, FastAPI, PostgreSQL, MongoDB, and Redis
• Build modern frontend applications using React, Next.js, TypeScript, and Tailwind
• Integrate centralized and decentralized exchanges, blockchain networks, and third-party APIs
• Design and implement real-time systems using WebSockets, Socket.IO, asyncio, and event-driven architectures
• Develop AI-powered features, portfolio analytics, trading automation, and market intelligence tools
• Build and maintain Telegram-based products and AI assistants
• Collaborate closely with Product Managers, Designers, AI Engineers, and other Developers
• Participate in architectural decisions, code reviews, and continuous platform improvements
• Ensure high performance, scalability, and security across all platform components
   

Work Experience

• 4+ years of commercial software development experience
• Experience building production-grade web applications and APIs
• Experience working with cryptocurrency, trading, fintech, Web3, or blockchain products
• Experience working in distributed remote teams
• Bachelor's degree will be a plus
   

Required Skills

• Strong Python knowledge, FastAPI, asyncio, aiohttp, websockets, SQLAlchemy 2.x (async), PostgreSQL, MongoDB, Redis
• JavaScript, TypeScript, React 18+, Next.js, Redux / Redux-Saga, Tailwind CSS
• Docker, Docker Swarm, Linux, Git
• JWT, RBAC, bcrypt, OTP authentication flows
• aiogram 3, CCXT, web3.py, Solana SDK, Alchemy, CoinGecko, GeckoTerminal APIs
• Cursor, Claude Code, ChatGPT, Gemini, Copilot, Windsurf, or similar
• Experience integrating external APIs
• Understanding of scalable distributed systems
• Experience with real-time applications
   

Will Be a Plus

• Personal projects
• English – B2+
   

About GT Protocol

GT Protocol (Global Trading Artificial Intelligence) is an AI-powered crypto trading ecosystem founded in 2021 and the ultimate AI infrastructure for trading.

GT Protocol enables users to build, backtest, optimize, launch, and execute trading strategies using fully automated AI-driven bots across centralized and decentralized crypto markets (CEX and DEX). Its products provide AI-powered infrastructure for strategy creation, optimization, backtesting, and automated execution across the crypto trading ecosystem.
 

Why GT Protocol?

— Over 100,000 users worldwide trust our products.

— Our platform combines AI, blockchain, trading infrastructure, and Web3 technologies into a single ecosystem.

— We process millions of market data events and integrate with major exchanges and blockchain networks.

— Our team includes experts from Europe, Asia, and the United States working remotely and collaboratively across multiple time zones.

— GT Protocol is backed by industry-leading investors and partners, including BNB Chain, Animoca Brands, ChainGPT, DAO Maker, CoinPayments, and others.

— We are regularly featured by major crypto and technology media and participate in leading blockchain conferences worldwide.

— You'll work on products at the intersection of AI, fintech, trading, and Web3 while helping shape the future architecture of the platform.

Currently, our team consists of talented professionals located across multiple countries. Our main office is based in Odessa, Ukraine; however, many team members work remotely worldwide.

Join something big — be a part of GT Protocol and help build the future of AI-powered investing.

Vienna onsite, International organization

We're looking for a software engineer to work in highly restricted environment.

General requirements:

• Ready for a daily office (up to 24 days per year remote)
• Must either already have a work permit in Austria or be a Ukrainian citizenship who relocated after the beginning of the scale invasion (this is a prerequisite for fast residence permit track)

Mandatory skills (min. 3-5 years of production experience):

• Angular
• Typescript
• ASP.NET (WebAPI)
• Entity Framework
• MS SQL

Asset skills:

• Experience building advanced analytical and statistical software solutions
• Experience with consuming data from a data lake house or data services (Trino)
• Experience with Docker and RabbitMQ
• Experience with Event Sourcing systems

Hiring process:

1. Introductory call (15-30min)
2. Technical interview
3. Occasionally, an additional interview round or technical assignment

Benefits:

• Residence permit obtaining support
• Adaptation, accommodation search support
• Austrian social package
  • 25 days vacation
  • Paid sick leaves

We are building a digital orthodontics platform with interactive browser-based 3D tools.

This role is primarily focused on frontend and 3D development with TypeScript, Angular, Three.js, and WebGL, with Node.js full-stack development as a secondary responsibility. You will build interactive tools for viewing, editing, and working with complex 3D models directly in the browser.

     You Are

• A software engineer with demonstrable experience building interactive web applications through commercial work, substantial personal projects, open-source contributions, or similar production-quality work.
• Strong in modern JavaScript and TypeScript.
• Able to work productively with Angular, including components, services, dependency injection, forms, routing, and application state.
• Experienced with RxJS or comparable reactive and asynchronous state-management patterns.
• Experienced with Three.js or a comparable WebGL-based engine, and ready to work directly with Three.js.
• Comfortable working with scenes, cameras, renderers, lights, meshes, materials, and render loops.
• Experienced with BufferGeometry, vertex attributes, index buffers, normals, typed arrays, and binary mesh data.
• Comfortable with 3D mathematics, including vectors, transformation matrices, local and world coordinate systems, rotations, and quaternions.
• Able to implement interactive 3D behavior such as raycasting, object picking, dragging, surface-constrained movement, camera controls, and object transformations.
• Familiar with triangle meshes, bounding boxes, spatial acceleration structures, collision or proximity checks, and common mesh edge cases.
• Able to work with 3D formats such as STL and understand model loading, coordinate systems, units, normals, and transformations.
• Able to profile and optimize browser rendering, CPU usage, GPU resources, and memory when working with large meshes.
• Familiar with Web Workers, ArrayBuffer, transferable objects, or other approaches for keeping expensive work off the main UI thread.
• Comfortable building and consuming REST APIs.
• Experienced with Node.js and Express, or a comparable backend stack.
• Familiar with file uploads, asynchronous jobs, persistent workflow state, authentication, validation, and error handling.
• Able to write unit, API/integration, and end-to-end tests.
• Familiar with Git workflows, pull requests, code review, and collaborative development.
• Comfortable taking ownership of AI-generated code by reviewing, testing, debugging, and validating it before delivery.

Angular experience is strongly preferred. Candidates with strong React or Vue experience may also be considered if they have substantial browser-3D expertise and can become productive in Angular quickly.

     
     Will Be a Plus

• Experience with three-mesh-bvh or similar BVH/AABB acceleration structures.
• Experience implementing mesh collision detection, proximity checks, or closest-point queries.
• Experience with mesh editing, contour manipulation, cutting planes, or CAD/3D-viewer tooling.
• Familiarity with GLSL, custom shaders, render targets, or GPU-based calculations.
• Experience with WebGL performance profiling and GPU resource lifecycle management.
• Familiarity with glTF/GLB, Draco compression, or other compressed 3D formats.
• Experience with voxel grids, octrees, signed distance fields, or spatial indexing.
• Experience integrating JavaScript applications with C++, WebAssembly, or native geometry-processing services.
• Experience implementing editor-style features such as command history, undo/redo, scene serialization, and reusable transformation tools.
• Experience with SQLite, PostgreSQL, DynamoDB, or repository-based persistence.
• Experience with AWS services such as S3, SQS, DynamoDB, or presigned upload workflows.
• Experience with Docker and containerized local development.
• Experience with Karma/Jasmine, Node’s test runner, and Playwright.
• Experience working with large binary files and object storage.
• Experience in medtech, healthcare, orthodontics, CAD, manufacturing, scientific visualization, or 3D printing.
• Familiarity with AI-assisted development tools such as Cursor, Claude Code, or Codex.

Advanced C++ or machine-learning expertise is not required. You will collaborate with engineers responsible for native geometry processing and ML services, but you should be able to understand their inputs, outputs, coordinate systems, and integration requirements.
 

     What We Expect from You

• Use modern AI development tools to work faster while remaining responsible for the correctness and maintainability of the resulting code.
• Make pragmatic engineering decisions that help us deliver quickly without creating unnecessary complexity.
• Investigate unfamiliar parts of the system independently and communicate important assumptions or risks.
• Proactively identify rendering, performance, memory, state-management, and UX problems and propose practical solutions.
• Validate 3D behavior using representative models and edge cases rather than relying only on visual inspection.
• Be comfortable working in an evolving product with changing priorities and early-stage ambiguity.
• Collaborate effectively with frontend, backend, C++, ML, and product team members.
• Take ownership of a feature across the frontend, 3D scene, API, persistence, and processing workflow when needed.
  
  Responsibilities
• Build and improve Three.js-based clinical 3D viewers and interactive planning tools.
• Implement scan inspection, preparation, and manual cleanup workflows.
• Build tools for mesh selection, surface interaction, landmark editing, transformations, segmentation review, and 2D/3D overlays.
• Maintain consistent transformations and coordinate systems across viewers, workflow steps, saved state, and backend processing.
• Optimize rendering and interaction for large clinical scan meshes.
• Move expensive geometry operations off the main browser thread when necessary.
• Manage mesh loading, caching, resource reuse, and correct disposal of WebGL resources.
• Implement Angular components and focused services following the project’s existing architecture.
• Maintain reliable synchronization between Three.js scene state, Angular state, and backend workflow state.
• Contribute to Express routes, services, repositories, validation, authentication, and storage integrations when a feature requires full-stack changes.
• Integrate the web application with asynchronous C++ geometry-processing and Python ML services.
• Write and maintain frontend unit tests, backend API tests, and Playwright end-to-end tests.
• Participate in technical design discussions and code reviews.
• Use AI-assisted development tools responsibly and help improve the team’s engineering workflows.
   

     What We Offer

• The opportunity to work on an innovative product in the medical-technology and browser-3D space.
• High ownership and direct impact on product UX and technical decisions.
• Close collaboration with specialists in frontend engineering, computational geometry, C++, and machine learning.
• Flexible working hours within the European time zone.
• A fast-moving environment where strong engineers can influence both product direction and system architecture.
• Company-paid access to premium AI developer tools, with a budget of $200+ per month depending on role and needs.
• Professional development support, including relevant courses and certifications.
• 20 paid business days of vacation.
• 5 paid sick-leave days.
• Paid national holidays.

ZentixSoft is looking for a Senior Full-Stack Engineer! 🚀

Format: Full-Time Outstaffing, long-term remote project. You will focus on building robust, high-performance, data-heavy product interfaces and enterprise backend workflows.

Working week Thursday- Sunday
 

💡 Why ZentixSoft? 
💸 Salary Review: A structured system of compensation reviews aligned with your engineering growth. 
⚖️ Work-Life Balance: Sustainable workflows with no senseless overtime, helping you keep your resource fully charged. 
🦾 Trust and Transparency: Zero micromanagement and no invasive time-trackers—we fully trust your professional autonomy. 
🎁 Gifts & Culture: Corporate gifts for holidays, birthdays, and a true team atmosphere where your voice always matters.
 

🧩 Responsibilities:

• Full-Stack Architecture: Design, build, and maintain scalable full-stack applications using TypeScript across the entire delivery lifecycle.
• Data-Heavy UI Engineering: Develop high-performance, responsive UI components and complex data-heavy interfaces using Angular.
• Backend Services: Architect and deploy resilient microservices and RESTful/GraphQL APIs using NestJS.
• Quality & Testing: Write clean, maintainable code with unit and integration tests (End-to-End automated testing using Cypress).
• Collaboration: Partner with product managers, UX designers, and backend team members to drive feature delivery from concept to production.
   

🎓 Requirements:

• Commercial Experience: 5+ years of professional full-stack software development experience.
• Frontend Mastery: Strong proficiency in TypeScript and modern Angular frameworks for building complex, data-intensive web applications.
• Backend Proficiency: Hands-on expertise with NestJS (Node.js ecosystem) for backend service architecture.
• Data & Performance: Demonstrated experience in optimizing UI performance for large datasets, state management, and real-time data handling.
• Testing: Experience with testing frameworks (Unit/Integration) and E2E testing tools.
• Communication: Upper-Intermediate/Advanced English for daily technical discussions.
   

➕ Nice to Have:

• Experience with Cypress for end-to-end testing pipelines.
• Knowledge of RxJS, NgRx, or modern Angular signals.
• Familiarity with CI/CD automation and containerized environments (Docker, Kubernetes).
   

📍 Project Details:

⏳ Duration: Long-term (Full-time).

📍 Location: Fully Remote.

Our Customer:

A global product company in the cybersecurity domain, focused on helping organizations identify and reduce risks across modern IT environments.

Your Tasks:

• Develop and maintain production features across the full stack, from the React UI through the API to the database.
• Design, maintain and troubleshoot Node.js and TypeScript backend services and production APIs.
• Maintain and enhance the React front end, including modern React patterns, data flow and UI performance.
• Own the data access layer in Node.js/TypeScript, keeping control over generated SQL and performance-critical behavior.
• Design and evolve database schemas, relationships, constraints and data integrity rules.
• Diagnose and optimize slow queries and production bottlenecks using execution plans and index analysis.
• Plan and execute production database migrations with backward compatibility and minimal downtime.
• Trace and resolve production incidents across the UI, API, data access layer and database.
• Interface directly with the international client and engineering team in live technical discussions.
• Deliver high-quality, resilient software updates with limited supervision.

Required Experience and Skills:

• 8+ years of professional software engineering experience, including recent hands-on full-stack work in production systems.
• Strong hands-on experience with Node.js and Node.js frameworks such as NestJS or Hapi.js.
• Expert-level knowledge of TypeScript in both backend services and data access layers.
• Strong production experience with React, including modern React patterns and state and data flow.
• Hands-on experience with state management libraries (MobX or Redux).
• Strong practical SQL skills, preferably with PostgreSQL.
• Hands-on experience with complex JOINs, aggregations and filtering on large datasets.
• Proven ability to diagnose slow queries using EXPLAIN and ANALYZE, execution plans and index effectiveness validation.
• Experience designing and maintaining data access layers with query builders or ORM tools.
• Practical experience with schema design, normalization and denormalization decisions, constraints and data integrity.
• Hands-on experience with multi-step transactional operations, rollback behavior, race conditions and transaction isolation trade-offs.
• Experience with production database migrations, schema versioning, backward-compatible changes and zero-downtime deployment approaches.
• Strong REST API experience, including over-fetching, N+1 problems, latency and efficient mapping of database data into API responses.
• Demonstrated ability to trace production issues across the UI, API, data access layer and database.
• Experience in production environments with large record volumes and high load.
• Experience working in an Agile environment, maintaining code quality through peer reviews and testing.
• Proven ability to work autonomously, clarify requirements and drive tasks to completion without continuous follow-up.
• Proven ability to take ownership of outcomes across the full stack rather than a single component.
• Proven ability to raise risks, blockers and missing information early and provide clear status updates.
• Ability to enter an existing codebase and domain, absorb context quickly and adapt to established engineering practices.
• Ability to receive direct feedback, discuss disagreements professionally and adjust quickly.
• English – Upper-Intermediate

Would Be a Plus:

• Hands-on experience with GraphQL schemas, resolvers and integration
• Experience with Next.js and server-side rendering
• Experience with stored procedures and database-side performance-critical logic
• Experience with Redis and caching strategies that reduce unnecessary database load
• Experience with AWS and cloud-based production environments
• Exposure to Docker, Kubernetes and CI/CD pipelines
• Background in cybersecurity or identity management
• Experience with large-scale identity data (Active Directory or Entra ID)
• Experience with data-intensive, analytics or enterprise high-load products