Jobs Fullstack

Kiss My Apps is a platform company uniting product verticals and 30+ AI-first products with over 100 million users and its own ecosystem of analytics, payment, and marketing solutions.

KMA products are global leaders in utilities, lifestyle, and health & fitness niches — AI Remodel, Printer, Botan, Calorie Counter, and more.
These are top-ranked App Store products solving real problems for hundreds of millions of users worldwide.

Our speed is our competitive advantage.
 

KMA is growing at least 3x year over year — and we’re looking for a Full Stack Developer who will help us scale even faster through strong engineering, structured thinking, and technology decisions that directly drive business outcomes.

This is a role for a product-minded engineer.

You will:

• Make architecture decisions
• Influence feature velocity
• Work on products with millions of users
• See your code reflected in retention, LTV, and revenue

We’re not hiring a task executor.
We’re hiring someone who naturally takes ownership.

What you’ll do

• Build and scale end-to-end features (frontend + backend)
• Architect scalable, performance-first solutions
• Reduce technical debt and eliminate bottlenecks
• Make tech decisions based on business leverage
• Partner directly with product and design
• Handle production issues with urgency
• Grow into a Tech/Team Lead role
 

Tech stack

Frontend: React.js, Next.js, Material UI, CSS
Backend: Symfony, Node.js, NestJS
Data & Infra: MySQL, PostgreSQL, Elasticsearch, Redis, Supabase, Firebase

We operate in high-load, SSR-heavy, AI-driven environments.

What matters to us

• You think in impact, not just implementation
• You ask “why” before “how”
• You don’t wait for permission to improve things
• You’re comfortable owning hard decisions
• Quality is your baseline

What will be a plus:

• You already operate at lead-level thinking
• You’ve built scalable systems
• You’ve worked in high-growth environments
• You want to build engineering, not just features

What you get

• Direct impact on products with millions of users
• High autonomy, low micromanagement
• Fast growth through ownership
• Strong engineering culture
• Remote or office (Kyiv/Warsaw)
• 40 days of paid leave
• Learning budget
• Military reservation option after probation
 

If you want your engineering to directly move revenue —
let’s launch the future together 🚀

Please note that the vacancy is only for candidates ready for offline format of work in Uzhhorod.

Build the most meaningful apps on the latest web technologies!

ABOUT ELEMENTICA

Welcome to Elementica! We are excited to see you on our profile. Elementica is a leading global software development company – expert in delivering web development, mobile application development and IT consulting services of any complexity to clients worldwide.

www.elementica.io

JOB POSITION

We are looking for a talented Fullstack Javascript Developer to join our Development Team. You will be at the core of our talented Web Apps teams and focus on building the most advanced and meaningful apps and workflows on the latest web technologies.

RESPONSIBILITIES AND DUTIES

As a fullstack developer, you will work on our next generation applications, a specific project critical to our customer’s needs. We need our engineers to be versatile, display leadership qualities and be enthusiastic to take on new challenges as we continue to push technology forward.

We are Product oriented developers with a growth mindset. We are curious problem solvers and we like to collaborate, communicate, share knowledge and technical ideas and grow together.

What you’ll do:

- Develop cloud based frontend and backend web applications

- Work in all phases of the software development life-cycle (planning, design, implementation, deployment, monitoring and support)

- Collaborate and grow in a dynamic environment while working in small, agile and cross functional teams

- Use the latest technologies to solve real problems for our customers

- Communicate and coordinate with our engineering team in Ukraine.

What we look for in you:

- Results-orientation, collaborative, pragmatic and agile mindset

- Strong knowledge in working with Javascript and Typescript

- Expertise with cloud service providers - Microsoft Azure

- Working proficiency in English (written and verbal)

- Continuous independent learning

We are looking for these skills/experience:

* Experience with React hooks, CSS-in-JS, Redux, Jest, Next.js

* Understanding of React components, rendering and optimisation principles

* Experience with web performance optimizations

* Deep knowledge of NestJS

* Familiarity with ORM (Object Relational Mapper) libraries - TypeORM

* Proficiency in unit and e2e testing, Jest, react-testing-library

* Strong knowledge of relational (PostgreSQL) and non-relational (MongoDB) databases

* Experience working with Docker and Docker Compose

* Understanding of common development principles and best practices (SOLID, DRY, YAGNI) and design patterns

* Experience in CI/CD processes is a plus

What we offer:

* The opportunity to drive the development of cutting-edge software products

* The chance to work on interesting technical challenges such as advanced algorithms, wide integrations or scalable content management

* A positive, highly skilled, young team with a focus on quality

* Hybrid working possibility / Flexible working hours

* Pick your own gear: Linux or IOS - whatever works best for you

* A lot of room for your own ideas. We always highly encourage you to work on them together with the team.

* Outstanding compensation based on experience and 20 days vacation

* Sponsored training opportunities with Udemy

Our job offer Fullstack Javascript Developer sounds interesting? Then we are looking forward to receiving your application!

We're looking for an experienced Team Lead Developer with strong technical expertise in Node.js & React and a solid background in leadership, to join our growing fintech development team in Lisbon, Portugal. You will lead a cross-functional team working on a payment integration platform, contributing directly to architecture, delivery, and team growth.

✅ Responsibilities:
✔️ Being transparent with the team about challenges, failures, and successes.
✔️ Hiring and training technical personnel.
✔️ Determining project requirements and developing work schedules for the team.
✔️ Delegating tasks and achieving daily, weekly, and monthly goals.
✔️ Liaising with team members and management to ensure projects are completed to standard.
✔️ Motivating staff and creating a space where they can ask questions and voice their concerns.
✔️ Delegating work and assignments to team members.
✔️ Collaborating with their team to identify and fix technical problems.
✔️ Lead the development of our in-house fintech platform with a focus on performance, scalability, and security.
✔️ Build and manage complex payment API integrations with banks, PSPs, and third-party services.
✔️ Contribute to full-stack development, ensuring consistency and stability across the product.
✔️ Actively participate in developing new features from concept to production.
✔️ Collaborate with product managers, designers, and stakeholders in agile workflows to ensure technical feasibility and business alignment.
✔️ Support the evolution of the architecture towards modern patterns (microservices, messaging systems, and scalable infrastructure).

✅ Requirements:
✔️ At least 8+ years of professional experience in the IT field.
✔️ 3+ years of experience in leadership positions.
✔️ 3+ years of commercial experience with Node.js & React.
✔️ 5+ years of commercial experience in web development.
✔️ Knowledge of JavaScript and the ECMAScript 6 standards.
✔️ Commercial experience in implementing REST and WebSockets.
✔️ Experience with Git version control system.
✔️ Experience with commercial databases, MySQL.
✔️ Experience with RabbitMQ.
✔️ Experience with Redis.
✔️ B2 level of English.
✔️ Excellent technical, diagnostic, and troubleshooting skills.
✔️ Strong leadership and organizational abilities.

✅ We offer excellent benefits, including but not limited to:
🧑🏻‍💻 Learning and development opportunities and interesting, challenging tasks.  
✈️ Relocation package (tickets, staying in a hotel for 2 weeks). 
🏋️‍♂️ Company fitness corner in the office for employees. 
📚 Opportunity to develop language skills and partial compensation for the cost of language classes. 
🎁 Birthday celebration present. 
🏝 Time for proper rest and 24 working days of Annual Vacation. 
🍲 Breakfasts and lunches in the office (partially paid by the company).

Bringg is building one of the most complex online platforms in global e-commerce - a mission-critical system that processes millions of transactions annually for some of the world’s biggest brands.
Our platform combines advanced algorithms, AI-driven decision-making, and distributed architectures across a broad spectrum of modern technologies. 

We’re looking for a motivated Junior Full-Stack Engineer with commercial experience to join our R&D team. This is a great opportunity to grow your skills while contributing directly to a real-time, high-scale production system and learning from experienced engineers.

For this role, we’re currently prioritizing candidates based in Ukraine (remote).

What you are expected to deliver (Responsibilities);

• Develop new features and maintain existing code across the backend and frontend parts of the system
• Write clean, maintainable, and performance-driven code with guidance from senior engineers
• Ensure code quality through unit and integration testing
• Collaborate closely with developers, product managers, and designers to deliver product value
• Continuously learn and improve your skills in building scalable backend services and user-facing applications

• All of the above with the help of AI instruments provided by Bringg

   

What we expect you to Bringg (Requirements);

• 1+ years of commercial experience in backend development with Node.js (Typescript)
• Some hands-on experience with modern frontend frameworks (React will be a big plus, Angular, Vue, or similar)
• Understanding of databases and APIs
• Eagerness to learn, collaborate, and grow in a team environment
• Strong problem-solving skills and attention to detail

• Upper-Intermediate English level

   

Nice to have;

• Experience with Ruby on Rails
• Experience with distributed systems or microservices environments
• Exposure to messaging/event-driven architectures (Kafka, RabbitMQ)
• Familiarity with version control systems like Git

• Interest in improving coding practices and learning new technologies

   

We care about our people! Here is a glimpse of our benefit package:

• Home Office Setup: $500 home office equipment allowance
• Meal Allowance: $100 monthly meal allowance
• Hybrid Work: Flexible hybrid work from home or office
• 20 days parental (non-birth) leave
• 2 vacation days + $250 gift when getting married
• A vacation day on your birthday
• Wellness Budget: $100 monthly budget for wellness or a sports activity of your choice
• Health Insurance: Provided after completing the trial period

Are you looking for a rare opportunity to join a startup at a very early stage? This is it. You will be the first!

We are growing 2x month over month for the last 3 months.

We already have customers like: SoundHound, Glovo, and Ideals. And yes, we launched just 4 months ago.

You’ll have plenty to do. It will be hard and will require real dedication - but it will also give you: 
1/ Disproportionate outcomes in $ in the future
2/ Tremendous personal growth tomorrow
3/ Freedom and full responsibility now (I’m pretty sure these are the things you’re currently missing)

— What You’ll Do —

- Autonomously architect, prototype, & build the product from the ground up
- Develop integrations with AI (e.g. Perplexity, OpenAI) & 3rd party API (e.g. CRMs)
- Leverage your prompt engineering skills to maximize the outcome
- Horizontally work with founders in discussions on business & product topics

— What You'll Need —
- 1+ years of experience in a startup previously - the must 

- Authentic obsession with giving customers the best
- The best verbal communication skills (yes, better than the founder)
- RAG & AI agents development and prompt engineering
- API development and integration
- Database design and optimization (SQL)
- Development in cloud infrastructure (AWS/GCP/Azure)
- Patterns for asynchronous task processing (RabbitMQ, SQS, or similar)
- Experience with n8n/make will be a great plus

— What We Give For You —

- Founding member equity %% (equal to $50,000+ which will be $500,000 next year)
- Learning how a startup grows
- Direct impact on product and company strategy
- Deliver value directly to paying B2B clients
- Opportunity to build and lead a team and department
- The most modern toolset (yes, we use Cursor in Agent mode)
- Adding more perks (including a healthcare package) with the next round/revenue ramp-up
 

— About Execue in Action — 
You can see how one of the agents (outreach; we also have recruitment agent) works on this video: https://www.loom.com/share/abc9ed9e86d84e3cb15c4142550ccb01
 

S-PRO, a top-tier Digital Innovation and Software Engineering company. We specialize in providing cutting-edge services for fast-growing businesses and enterprises, with a strong focus on Finance, Renewable Energy and Healthcare domains and expertise in AI, Blockchain and Data Science. Our team of over 200 dedicated professionals works tirelessly across our global offices to develop innovative digital solutions that drive sustainable business value and increase our client’s competitiveness in a dynamic digital landscape.

Project description: The product is one of the first licensed digital asset banks powered by Blockchain. Our team is covering the delivery part of one of the core company’s services. It allows in a very simplified manner, process of capital raising for companies and investors providing the creation of new assets, manage offerings, buy, trade and earn crypto to future-proof your investment strategy.

Job requirements:

• Develop and maintain backend services for the blockchain platform;
• Implement new features and improvements using Node.js (NestJS) or React and TypeScript;
• Manage PostgreSQL databases (TypeORM or other ORM solutions);
• Implement cloud services using AWS (S3, SES, RDS);
• Participate in testing, code review, estimation, debugging, and production support;
• Independently gather and clarify requirements for implementation;
• Take ownership of project execution and lead development processes independently.

Requirements:

• 7+ years of experience as a FullStack Developer;
• Experience with fin-tech projects or integrating with payment systems;
• Strong knowledge of Node.js, TypeScript, and NestJS;
• Strong knowledge of React, React Query, Valtio, MUI;
• Experience with PostgreSQL (TypeORM or other ORM solutions);
• Strong experience with message brokers (Kafka);
• Nice to have Docker, Kubernetes experience;
• Experience in the infrastructure (terraform, helm charts);
• Experience with observability/monitoring (datadog or similar);
• Hands-on experience with AWS services (S3, SES, RDS);
• Knowledge of software development processes such as testing, code review, debugging, estimation, and production support;
• Ability to independently analyze requirements and implement solution;
• General understanding about blockchain (tokenization, smart contracts, how to handle blockchain transactions);
• Design patterns and algorithms knowledge.

What we offer:

• Long team focus: we create an environment of transparent communication, and minimal bureaucracy, which leads to long-term relationships.
• Development of niche expertise: we are working in several niches, such as FinTech, healthcare, and logistics. Therefore, our employees can develop their own expertise in these domains.
• Continuous learning: we create employee development plans / personal roadmaps /quick promotion processes.
• Internal career development: 80% of our current executives were promoted to those positions within S-PRO. We encourage initiative. If a person wants to set new challenges and grow, we will definitely support them.

Benefits and perks:

• Flexible schedule.
• Remote work model.
• Medical insurance
• Paid vacations
• Paid Sick-leaves.
• Paid State holidays.

We are looking for an experienced Senior Full-Stack Developer with strong expertise in .NET backend technologies and modern React-based frameworks (Next.js with TypeScript).

In this role, you will help design, develop, and scale a biotech platform that includes functionality for storage management, billing, and patient-related workflows. The position requires a hands-on engineer who is comfortable making architectural decisions, writing high-quality, maintainable code, and collaborating within a small, highly efficient team.

You will also work directly with clients to gather requirements, participate in system architecture discussions, and ensure that the platform delivers secure, scalable, and high-performance solutions across the full technology stack.

Responsibilities

Backend Development (.NET / Azure)

• Build and maintain scalable backend services using C#, ASP.NET, and .NET Core
• Design and implement RESTful APIs and backend components
• Structure and optimize relational databases (SQL Server, PostgreSQL, or similar)
• Integrate external services such as DocuSign and payment platforms (Stripe, Square)
• Deploy and manage applications within the Microsoft Azure ecosystem
• Ensure high availability, scalability, and system reliability
• Apply strong security and data protection standards

Frontend Development (React / Next.js)

• Develop responsive web interfaces using React, Next.js, and TypeScript
• Create reusable UI components and shared front-end libraries
• Implement state management solutions such as Redux
• Optimize web performance, scalability, and SEO using SSR and modern routing
• Follow secure coding practices and OWASP recommendations
• Work closely with designers to convert UI/UX concepts into production-ready code
• Integrate frontend applications with backend services and APIs

Collaboration & Engineering Practices

• Work closely with developers, QA engineers, product managers, and business stakeholders
• Contribute to architecture design and technical decision-making
• Communicate directly with customers to clarify needs and improve solutions
• Review code and support the growth of junior engineers
• Participate in CI/CD pipelines and deployment processes
• Operate effectively within a fully remote team working in US time zones

Requirements

• 5+ years of professional experience in software engineering
• Strong hands-on experience with:
  • .NET ecosystem (C#, ASP.NET, .NET Core)
  • React with TypeScript
  • Next.js (SSR, routing, performance optimization)
• Proven experience designing RESTful APIs and scalable backend systems
• Practical experience with Microsoft Azure
• Strong knowledge of SQL database design and optimization
• Experience integrating third-party services (DocuSign, Stripe, Square, etc.)
• Experience with Redux or similar state management tools
• Familiarity with modern CSS frameworks (e.g., Tailwind CSS)
• Solid understanding of web security principles and common vulnerabilities
• Experience working with Git and version control workflows
• Strong communication skills and ability to collaborate in a small distributed team
• Ability to work independently in a remote environment

Nice to Have

• Experience in biotech, healthcare, or regulated industries
• Familiarity with patient management, billing, or storage-related platforms
• Experience with frontend testing tools such as Jest or React Testing Library
• Experience integrating analytics and tracking tools (Google Tag Manager, Segment)
• Background in startups or small product teams
• Knowledge of CI/CD automation and DevOps practices

What We Offer

• Opportunity to work on innovative solutions in the biotech sector
• Influence on technical architecture and product development
• Close collaboration with customers and decision-makers
• Flexible remote work environment
• The chance to contribute to the growth of a scalable technology platform

We are looking for a skilled Full Stack Developer (Python + Vue.js) to join our experienced and compact product team.

We develop and maintain a wide range of internal services that keep the company running — from our gaming platform and back-office tools to analytics infrastructure. Our tech work is deep: we deal a lot with databases, distributed systems, architecture planning, and performance validation through R&D.

Your main focus will be on developing and continuously improving three internal platforms, strengthening their integration with other company systems, and ensuring a seamless experience for our users and partners.

We’re a remote-friendly team with minimal bureaucracy: just one weekly stand-up and ad-hoc syncs as needed.

Our priority is to balance business impact with engineering quality — and to keep the team happy, motivated, and proud of what we build.

Requirements

• 3+ years of experience building web solutions using Python and JavaScript;
• Experience in defining, analyzing, and documenting business requirements;
• Working knowledge of relational and non-relational databases and SQL;
• Understanding data structures, algorithms, and design patterns;
• Experience in Docker/Kubernetes;
• Native Ukrainian (spoken and written);
• Good level of written English.

Responsibilities

• Consistently write effective high-quality code that is stable, secure, scalable, and efficient;
• Improve existing products and tools;
• Participate in architecture design and code reviews;
• Collaborate with team members to agree on priorities and solutions;
• Provide code documentation and other inputs to technical documents.

Technology stack

• Python (Flask/FastAPI, Celery, SQLAlchemy);
• Javascript/TypeScript (VueJS);
• PostgreSQL;
• Redis;
• GIT, CI/CD (Jenkins);
• Docker;
• Kubernetes/Helm.

Benefits

Why Join Us?

🎰 Be part of the international iGaming industry – Work with a top European solution provider and shape the future of online gaming;

💕 A Collaborative Culture – Join a supportive and understanding team;

💰 Competitive salary and bonus system – Enjoy additional rewards on top of your base salary;

📆 Unlimited vacation & sick leave – Because we prioritize your well-being;

📈 Professional Development – Access a dedicated budget for self-development and learning;

🏥 Healthcare coverage – Available for employees in Ukraine and compensation across the EU;

🫂 Mental health support – Free consultations with a corporate psychologist;

🇬🇧 Language learning support – We cover the cost of foreign language courses;

🎁 Celebrating Your Milestones – Special gifts for life’s important moments;

⏳ Flexible working hours – Start your day anytime between 9:00-11:00 AM;

🏢 Flexible Work Arrangements – Choose between remote, office, or hybrid work;

🖥 Modern Tech Setup – Get the tools you need to perform at your best;

🚚 Relocation support – Assistance provided if you move to one of our hubs.

      Must-have

• Strong JavaScript (ES6+) and TypeScript knowledge. Solid practical experience with React: components, hooks, state/props, lifting state.
• Experience with state management libraries (preferably Zustand, Redux Toolkit, or React Query).
• Ability to work with UI component libraries and styling tools (Shadcn, Tailwind CSS).
• Data table libraries experience (Material React Table / TanStack Table or alternatives).
• Experience working with REST APIs: fetching, optimistic updates, error handling.
• Ability to independently implement backend logic (Node.js + Express/Fastify/NestJS or similar) for new endpoints or business logic.
• Understanding of server-side concepts: routing, validation, auth basics, working with databases (SQL/NoSQL) at a basic level.
• Good analytical and mathematical reasoning (many features require non-trivial data transformations).
• HTML5/CSS3 knowledge including responsive layouts (Flexbox/Grid) and cross-browser aspects.
• Familiarity with code quality tools (ESLint, Prettier) + DRY/KISS principles.
• Git/GitHub workflow: branches, PRs, resolving feedback.
• English sufficient for documentation and task discussion.
   

     Nice to have

• Testing experience (Jest + React Testing Library).
• Performance awareness (React rendering, memoization, profiling).
• Familiarity with CI/CD (GitHub Actions).
• Basic understanding of backend architecture (monolith/microservices).
   

     Main responsibilities

• Rewrite parts of an existing React-based application into a standalone application using React + TypeScript.
• Build and maintain React components with clean, modular, and reusable structure.
• Implement data-intensive logic and transformations with attention to mathematical correctness.
• Integrate REST APIs and extend backend functionality when needed (Node.js + DB).
• Maintain consistent code style (ESLint/Prettier) and add tests for core logic.
• Fix bugs, refactor legacy code, and improve maintainability under lead/mentor guidance.
• Ensure performance, responsive UI, and baseline accessibility.
• Participate in technical discussions and collaborate closely with other developers.

How we work

• You’ll join a cross-functional product team (1–3 FE engineers, 1–3 BE engineers, manual + automation QA, Scrum Master, Solution Architect, Business Analyst, Product Owner).
• The team collaborates with product managers and designers across streams.
• We run 2-week sprints and ship usable increments.
• We follow SAFe ceremonies: daily scrum, planning, grooming/refinement, review/demo, retrospective.
• Expect hands-on delivery plus healthy participation in design/tech discussions.

What you will be doing

• Building and evolving user-facing features for a medical imaging application.
• Implementing UI in Angular (component architecture, state, forms, routing, performance).
• Developing backend capabilities in .NET (APIs, business logic, data access, integration).
• Writing clean, testable, reusable code (shared modules, libraries, abstractions).
• Integrating UI with multiple API surfaces (backend endpoints, internal libraries/services).
• Designing modular behavior based on client configuration (feature flags, tenant rules, conditional workflows).
• Translating UI/UX specs into working product while keeping feasibility and maintainability in check.
• Collaborating with QA to ensure coverage (unit tests, integration tests, automation hooks).

About you

• 4+ years relevant experience in full-stack development.
• Strong with Angular 2+ and TypeScript (RxJS included).
• Solid fundamentals in HTML/CSS, responsive and adaptive design.
• Strong .NET / C# experience (ASP.NET Core, REST APIs).
• Comfortable with OOP principles and pragmatic functional patterns.
• Familiar with common web security and API concerns (auth, validation, error handling).
• Fluent spoken and written English.

Nice to have

• Nx monorepo experience, Webpack 5, Module Federation.
• Experience with backend architecture beyond CRUD (background jobs, messaging, caching).
• CI/CD familiarity (pipelines, releases, branching strategy, environment promotion).
• Experience working in international distributed teams.

Your Role

As a full-stack developer, you will be responsible for the holistic development and implementation of modern software solutions- from architecture and deployment to operation. You will work closely with the product team to design and continuously improve high-performance, scalable, and maintainable systems. You will primarily contribute your expertise to backend development (70%), while also contributing to frontend development (30%) and actively promoting the team’s technical excellence.

Your tasks

• You have end-to-end responsibility for software solutions, from conception and architecture to development, testing, deployment, and commissioning.
• You design and develop modern software architectures with a focus on scalability, maintainability, and performance.
• You develop robust backends based on Laravel (PHP) and ensure a clean, efficient code base.
• You build modern, reactive front ends with Vue 3 that combine UX and technical excellence.
• You set up CI/CD pipelines (e.g., with GitHub Actions), containerize applications with Docker, and are responsible for efficient database design (MySQL, PostgreSQL).
• You ensure that code quality, architectural principles, and best practices are implemented in the project.
• Topics such as data processing, automation, and AI integration (e.g., Python-based services) are exciting fields for you, in which you would like to familiarize yourself or contribute your existing knowledge.
• You work in cross-functional teams on MVPs and iterative product development.

Your Profile

• You have a technical background and at least 5 years of practical experience as a developer, ideally in the service provider environment.
• You have excellent knowledge of Laravel, are confident in using Vue 3, CSS, have in-depth knowledge of MySQL or PostgreSQL, and have experience with Docker.
  Basic knowledge of PrimeVue and Figma is a plus.
• You have experience in setting up CI/CD pipelines, ideally via GitHub Actions. Knowledge of Kubernetes and Infrastructure as Code (IaC), as well as applications in cloud environments such as Azure or DigitalOcean, is a plus.
• You have a solid understanding of software architecture principles and their practical application.
• You are enthusiastic about data, AI, and new technologies—you like to experiment, try things out, and bring innovative ideas to the team.
• Personally, you are characterized by solution-oriented and structured thinking, initiative, a sense of responsibility, and a passion for clean, maintainable code.
• You are a team player who communicates proactively (in English) and enjoys collaborating on interdisciplinary projects.

What we offer:

— Interesting and challenging work in an international developing company;

— Competitive remuneration based on € and annual review (based on performance);

— 24 vacation days and paid public holidays;

— 100% Paid sick leaves;

— Work remotely or in a hybrid model, based on your choice.

We are looking for an experienced Senior Full-stack Web3 Engineer to join our team and contribute to building modern blockchain-powered applications. You will work across the full technology stack — from frontend interfaces and backend services to on-chain integrations — delivering scalable and secure Web3 products used by real users.

This role is ideal for engineers who enjoy owning features end-to-end, working with decentralized systems, and solving complex product challenges in Web3 environments such as DeFi platforms, wallets, or blockchain-based services.

Requirements

• 5–7+ years of professional experience as a Full-stack Engineer, including hands-on production experience with Web3 applications.
• Strong experience building dApps and Web3 integrations, including wallet connectivity, blockchain RPC interaction, indexing, and transaction processing.
• Understanding of DeFi primitives such as DEXs, swaps, lending, liquidity pools, and trading mechanisms.
• Experience with modern frontend development using TypeScript, React, Redux, or similar frameworks.
• Backend development experience with Node.js, C#, Go, Java, or similar technologies.
• Experience interacting with smart contracts and blockchain systems (e.g., Solidity, Ethereum-based ecosystems).
• Solid understanding of the transaction lifecycle: signing, submission, execution, confirmations, and failure handling.
• Strong focus on security best practices when designing and integrating Web3 systems.
• Experience building scalable distributed systems, including monitoring, logging, tracing, and performance optimization.
• Ability to work across the stack and take ownership of features from architecture to production.

Responsibilities

• Design and develop Web3-enabled applications, including frontend interfaces, backend services, and blockchain integrations.
• Implement wallet connectivity and transaction flows, ensuring reliability and security.
• Build and maintain integrations with blockchain nodes, RPC endpoints, and indexing services.
• Work on DeFi-related functionality, including swaps, payments, settlement flows, and smart contract interactions.
• Collaborate with product, design, and engineering teams to deliver scalable solutions.
• Ensure system performance, reliability, monitoring, and observability across services.
• Contribute to architecture decisions and continuously improve the platform’s technical foundations.

We offer

• Competitive compensation based on experience.
• Opportunity to work on cutting-edge Web3 and DeFi products.
• Remote-friendly work environment with flexible collaboration.
• Work with experienced engineers on high-impact blockchain systems.
• Professional growth and the opportunity to expand across frontend, backend, and on-chain development.

N-iX is looking for a Lead Full Stack Engineer (Java+React) to join our team.

This role is roughly 70% hands-on coding and 30% technical leadership - you will own architectural decisions, drive technical direction, and unblock the team while still shipping code daily. The team actively uses AI coding agents as part of daily development workflows to move faster and deliver higher-quality code — you will be expected to champion and advance this practice across the team. Currently, the team is international with developers and QA from Ukraine, Latin America, and the US. 

Responsibilities

• Lead a team of full-stack developers: set technical direction, run design reviews, and mentor junior and mid-level engineers
• Hands-on development - write production code daily alongside the team
• Own architectural decisions for new features and system-level improvements
• Drive adoption of AI coding agents across the team, establish best practices and workflows for AI-assisted development
• Develop and review REST services supporting high-volume, low-latency web and mobile apps
• Design and implement DB schema changes (MS SQL Server) and oversee Flyway migration strategy
• Maintain and modernize the existing codebase, including planning migration paths for legacy modules
• Triage and lead resolution of production incidents
• Collaborate with product, QA, and other engineering teams to define, scope, and deliver features
• Conduct thorough code reviews and establish team coding standards
• Identify and address technical debt, performance bottlenecks, and reliability risks

Requirements

• 7+ years of professional software development experience, with a strong Java background
• 2+ years of experience in a tech lead or principal engineer role, mentoring developers and driving technical decisions
• At least 6 months of hands-on experience using AI coding agents (e.g., Claude Code, GitHub Copilot, Cursor) in day-to-day development workflows - this is a hard requirement, not a nice-to-have
• Deep proficiency in Java 11 and the Spring ecosystem (Spring MVC, Spring Security, Spring JDBC)
• Practical experience working with React 18 (Redux, Material UI, or similar component libraries)
• Strong experience with MS SQL Server and database design, including writing and managing Flyway migrations
• Experience with the Gradle build system
• Solid understanding of distributed systems, messaging patterns (Azure Service Bus, AWS SQS), and cloud-native architectures
• English language skills at an advanced level or higher - you will lead meetings and technical discussions
• Ukrainian language - Advanced or higher

Nice to have

• Experience with both AWS (S3, SQS, DynamoDB, Lambda) and Azure (Service Bus, Blob Storage) 
• Knowledge of Docker and Kubernetes 

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Why join us
If you’re looking for a place to grow, make an impact, and work with people who care, we’d love to meet you! :)

About the role
As a Middle/Senior Full Stack Engineer (.Net), you will play a key role in modernizing a retail-focused web platform that directly improves how deals are managed and shared across a large ecosystem. This role offers meaningful impact on product evolution, close collaboration within a skilled engineering team, and the chance to influence technical decisions across the full stack. You’ll work with modern .NET and Blazor technologies in a growth-oriented environment that values quality, scalability, and continuous improvement while supporting your professional development.

What you will do
● Design and develop an application using .NET Core / .NET 8 and Blazor to manage and display retail deals
● Implement RESTful APIs to support data exchange between the front end and back end
● Develop business logic and application components using C#
● Design, implement, and maintain the database using SQL and Entity Framework Core
● Ensure application security, performance, and scalability
● Perform testing, debugging, and ongoing maintenance to ensure system stability and reliability
● Manage source control, build pipelines, and deployments using Azure DevOps

Must haves
● 3–5 years of experience in .NET backend development
● Solid experience in .NET backend development
● Some experience working with any UI JavaScript framework
● Good communication skills
● Upper-intermediate English level

Nice to haves
● Experience working with Blazor
● Experience with AWS or Azure cloud

Perks and benefits
● Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps
● Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities
● A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands
● Flextime: Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office — whatever makes you the happiest and most productive.

Meet Our Recruitment Process
Asynchronous stage — An automated, self-paced track that helps us move faster and give you quicker feedback:
● Short online form to confirm basic requirements
● 30–60 minute skills assessment
● 5-minute introduction video

Synchronous stage — Live interviews
● Technical interview with our engineering team (scheduled at your convenience)
● Final interview with your future teammates

If it’s a match—you’ll get an offer!

We are looking for a skilled Tech Lead who can actively contribute to creation of a new solution for one of the biggest world platforms that works with Data and Product Identification. It is a global organization that has been developing standards for effective communication in product and logistics for more than 40 years. The company is an authorized Microsoft partner with offices in over 100 countries, serving more than 2 million businesses worldwide.
The company’s product portfolio includes a wide range of solutions that support identification, standardization, data management, and secure cloud-based information exchange

Key points:

• Long term replatforming initiative of several projects;

• Development from scratch;

• Active participation in system design;

• Skilled Architects, BAs, PMs in a team. 

Skills required:

• 7+ years of software development experience; 
• Commercial experience in Node.js (TypeScript, Nest.js);
• 5+ years of experience with DBs (SQL/Non-SQL/Document);
• Experience in developing, deploying, and debugging cloud-based applications using Azure; 
• To be familiar with other Azure services like Azure Functions, Logic Apps, App Services, Azure AD B2C;
• Familiarity with one of the front-end frameworks;
• Upper-intermediate English is a must.

Responsibilities:

• Participation in system design of the portfolio of applications;
• Leading the technical design and implementation of the solution;
• Developing a brand-new solution through MVP and beyond; 
• Collaborate with cross-functional team of architects, developers, business-analysists to implement the vision for the new generation of solution;
• Developing both back-end and front-end sides of a product;
• Work on integration with the internal and external systems as per business needs.

Will be a plus:
• Experience with GraphQL;
• Experience in Azure DevOps, CI/CD pipelines, and infrastructure as code (IaC) using tools such as ARM or Terraform; 
• Knowledge of security best practices for cloud-based solutions, secure software development practices.

We offer:

• Flexible working arrangements;
• Paid vacations and sick leaves;
• Partial compensation for any sports activity;
• Medical insurance;
• English courses paid by the company;
• Challenging, and fast-growing product;
• Autonomous team structure with a lot of freedom and ownership;
• Opportunities to speak with clients and the development team only in English and free English classes.