Jobs Fullstack

Про компанію

• Платформа ШІ-агентів дозволяє компаніям розгортати індивідуальні рішення на основі штучного інтелекту (такі як автоматизація документообігу, операційна аналітика та агенти штучного інтелекту) за лічені дні, а не місяці. 

Вимоги до кандидата:

• Освіта та фундаментальні знання: вища освіта в галузі Computer Science (бакалавр або магістр) з акцентом на алгоритми, структури даних та дискретну математику. Обов'язкове глибоке розуміння основ: асимптотичний аналіз (Big O, Theta, Omega), динамічне програмування, графи (BFS/DFS, найкоротші шляхи), дерева (бінарні, AVL, B-дерева), хеш-таблиці, черги, стеки та купи. Кандидати без формальної CS-освіти не розглядаються.
• Інженерний майндсет: Доведений досвід у розв'язуванні складних проблем з фокусом на ефективність, масштабованість та оптимальність. Ми очікуємо, що ви можете пояснити, чому вибрали певну структуру даних для задачі (наприклад, чому Trie краще за хеш-мапу для автодоповнення) та проаналізувати trade-offs (час vs. простір).

• Практичний досвід: Мінімум 2-3 роки в розробці, де ви застосовували CS-концепції на практиці (наприклад, оптимізація алгоритмів у production-коді). Знання мов програмування (JS, C++, Java, Python) на рівні, достатньому для competitive programming.

   

Бонуси (значно підвищують шанси):

• Призові місця на олімпіадах з програмування (IOI, ICPC, Google Code Jam, Facebook Hacker Cup) або регіональних змаганнях.
• Високий рейтинг на платформах: LeetCode (Knight+ або 2000+ rating), HackerRank (Gold+), Codeforces (Expert+ або 1900+ rating). Надсилайте посилання на профіль у резюме – ми перевіримо.
• Участь у хакатонах з фокусом на алгоритмічні задачі (наприклад, перемоги на HackMIT, AngelHack).

Важливо: Ми шукаємо тільки тих, хто має солідний теоретичний бекграунд і може довести його на технічному інтерв'ю (live coding з задачами на алгоритми). Якщо ви самоучка без формальної освіти чи досягнень у competitive programming, ця вакансія не для вас – ми не розглядаємо резюме без підтвердження CS-фундаменту. Подання: надішліть CV з прикладами розв'язаних задач (посилання на GitHub або LeetCode).

Над чим ви працюватимете

• Впровадження та налаштування розгортання платформи для корпоративних клієнтів на базі стеку JavaScript/TypeScript (Express, Vue.js), баз даних PostgreSQL. 
• Створення інтеграцій між платформою та клієнтськими системами
• Співпраця з внутрішніми командами для розуміння вимог клієнтів та їх перетворення на технічні рішення
• Внесок у розробку інструментів впровадження, документації та повторюваних процесів розгортання
• Виправлення неполадок та вирішення проблем під час та після розгортання
• Періодична участь у дзвінках клієнтам для збору вимог або надання технічних рекомендацій

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About the Company

• Enterprise AI development platform that emerged from a hidden activity in 2025 thanks to $50+ million in funding.
• Main purpose: The platform allows companies to deploy customized AI solutions (such as document automation, operational analytics, and AI agents) in days, not months.
• Enterprise segment and deep integrations with enterprise business processes.
• Key features: The platform is model-agnostic, meaning users can use their own AI models, and it guarantees data privacy without training third-party models on customer data.

Candidate requirements:

• Education and fundamental knowledge: Higher education in Computer Science (Bachelor's or Master's) with a focus on algorithms, data structures, and discrete mathematics. A deep understanding of the fundamentals is required: asymptotic analysis (Big O, Theta, Omega), dynamic programming, graphs (BFS/DFS, shortest paths), trees (binary, AVL, B-trees), hash tables, queues, stacks and heaps. Candidates without a formal CS education will not be considered.
• Engineering mindset: Proven experience in solving complex problems with a focus on efficiency, scalability and optimality. We expect you to be able to explain why you chose a particular data structure for a problem (e.g. why a Trie is better than a hash map for autocompletion) and analyze trade-offs (time vs. space).

• Practical experience: Minimum 2-3 years in development, where you applied CS concepts in practice (e.g. optimization of algorithms in production code). Knowledge of programming languages ​​(JS, C++, Java, Python) at a level sufficient for competitive programming.

   

Bonuses (significantly increase your chances):

• Prize-winning places at programming olympiads (IOI, ICPC, Google Code Jam, Facebook Hacker Cup) or regional competitions.
• High rating on platforms: LeetCode (Knight+ or 2000+ rating), HackerRank (Gold+), Codeforces (Expert+ or 1900+ rating). Send a link to your profile in your resume - we will check it.
• Participation in hackathons with a focus on algorithmic problems (for example, victories at HackMIT, AngelHack).
• Important: We are only looking for those who have a solid theoretical background and can prove it at a technical interview (live coding with algorithmic problems). If you are a self-taught person without formal education or achievements in competitive programming, this vacancy is not for you - we do not consider resumes without confirmation of CS-foundation. Submission: send a CV with examples of solved problems (link to GitHub or LeetCode).

What you will be working on

• Implement and configure the deployment of a platform for enterprise customers based on a JavaScript/TypeScript stack (Express, Vue.js), PostgreSQL databases.
• Create integrations between the platform and customer systems
• Collaborate with internal teams to understand customer requirements and translate them into technical solutions
• Contribute to the development of implementation tools, documentation, and repeatable deployment processes
• Troubleshoot and resolve issues during and after deployment
• Periodic participation in customer calls to collect requirements or provide technical recommendations

We are looking for an experienced Senior Java Full Stack Engineer to join our development team.

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Hands-on full-stack development of innovative applications
• Owning the entire development cycle, including design, architecture, development, and DevOps

• Working in XP with Remote pairing

   

Requirements:

• BS degree in Computer Science or equivalent combination of education and experience
• 5-6+ years of full-stack development
• 5-6+ years of experience in the following technologies: Java, Spring
• Experience with Functional Programming and Java Streams
• 2+ years of experience in front-end development with React
• Experience with developing a reactive UI (Reactive JS)
• 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium
• 2+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud)
• Experience in DevOps development and Jenkins
• Experience in development in Kotlin – an advantage
• Experience in designing, developing, and deploying cloud/hybrid-based solutions
• Experience in developing and deploying in container-based environments (Kubernetes, Cloud Foundry)
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker
• Self-starter with the ability to appropriately prioritize and plan complex work in a rapidly changing environment
• Versatility and the capability to switch easily between different tasks and technologies
• Experience in assessing a broad range of information solutions and products
• Strong critical thinker with problem-solving aptitude

• Good English - verbal and written

   

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

Data Science UA is a service company with deep expertise in AI and Data Science. Our story started in 2016 with the first Data Science UA Conference in Kyiv, and since then, we’ve built one of the largest AI communities in Europe.

About the role: 
We are looking for a Full Stack Engineer to join the CTO Office and take ownership of our client’s product development lifecycle. You'll work hand-in-hand with the CTO Office team, taking initiatives that have been validated as POCs and leading them into production-grade, scalable solutions.

Responsibilities:
- Take validated POCs from the CTO Office and architect, build, and ship them as production-ready applications
- Design and develop full-stack solutions — modern frontends paired with robust, scalable backends
- Build and deploy within the AWS ecosystem (Lambda, ECS/EKS, DynamoDB, S3, RDS, API Gateway, CDK/CloudFormation, and more)
- Own the CI/CD pipeline — design, build, and maintain automated workflows using GitHub Actions
- Design and build internal agentic AI solutions using LangChain and LangGraph — from multi-step agent orchestration to RAG pipelines and tool-augmented workflows
- Leverage Agentic IDE tools (Cursor, Claude Code, and similar) as a core part of your development workflow, applying best practices around skills, MCPs, agents, and prompt engineering to accelerate delivery
- Collaborate closely with the CTO Office, product stakeholders, sales, and pre-sales teams to translate business needs into elegant technical solutions 
- Make pragmatic technology decisions that balance speed, quality, and maintainability

Requirements:
Must-Have:
- 5+ years of professional full-stack development experience
- Frontend: Strong proficiency with Vue.js or React (with modern tooling such as Nuxt/Next.js, TypeScript, Vite, Tailwind CSS)
- A builder's mindset — you thrive on taking something from prototype to production
- Understanding of system design principles — you can architect scalable, reliable distributed systems and make sound trade-offs
- Grasp of data structures and design patterns — to work alongside your Agentic IDE you write efficient, well-structured code
- Backend: Solid experience with Python and modern frameworks — primarily FastAPI, or Django/Flask
- Hands-on experience with the AWS cloud ecosystem — you've built and deployed real workloads on AWS
- Hands-on experience building agentic AI systems with LangChain and LangGraph — including multi-agent orchestration, tool use, and RAG patterns
- Proven experience designing and maintaining CI/CD pipelines with GitHub Actions including automated PR based Code Reviews.
- Working knowledge of Agentic IDEs and AI-assisted development (Cursor, Claude Code, Windsurf, or similar) — including familiarity with skills, MCP servers, agents, and AI-driven development best practices
- Strong understanding of RESTful API design, relational and NoSQL databases, and cloud-native architecture patterns

Nice-to-Have:
- Experience with Amazon Bedrock and/or Azure AI Foundry for building and deploying AI/ML solutions on managed cloud platforms
- Experience with Infrastructure as Code (AWS CDK, Terraform, CloudFormation)
- Experience in security infrastructure (IDP, authentication protocols - S) and writing secured applications 
- Security & Identity - understanding of application security, including SSL/TLS certificates, secret management, and identity providers (IDP). Experience implementing authentication and authorization protocols such as SAML, OAuth2, and JWT.
- Foundational SRE knowledge, including monitoring, logging, and observability (e.g., CloudWatch, Prometheus, ELK) to ensure production stability and performance.
- Familiarity with FinOps concepts, cloud cost management, or multi-cloud environments
- Experience building data-driven tools — predictive models, analytics dashboards, or recommendation engines
- Exposure to Azure services alongside AWS
- Experience with containerization and orchestration (Docker, Kubernetes)
- Background in B2B SaaS or enterprise software development

Ever worked in an environment where engineers are expected to challenge bad code instead of silently accepting it?
Where spotting hidden bugs, architectural problems, and security risks matters more than shipping features fast?
Where your opinion is valued specifically because you can say: “this implementation is wrong and here’s why”?

If you’re confident reviewing unfamiliar systems, care deeply about engineering quality, and prefer direct technical communication over corporate politeness - this role is for you.

About the Company

Our client is a Switzerland-based trading technology company building a stock trading platform used for real-time trading operations and financial workflows.

The platform includes: real-time market data, order entry & order management, portfolio management, watchlists & alerts, trading dashboards, internal CRM systems.

The Role

We’re looking for a Senior Software Engineer focused on architecture review, code quality, reliability, and technical evaluation across multiple systems.

This is not primarily a feature-development role.

You’ll work with existing production systems, reviewing and evaluating code written in Python, TypeScript/React, and partially Rust-based environments.

What You’ll Do

Review & Evaluate Engineering Quality

• Analyze backend and frontend codebases critically
• Review architecture using Clean Code, SOLID, and DDD principles
• Detect technical debt and maintainability risks
• Evaluate pull requests and engineering decisions

Hunt Bugs & Reliability Problems

• Detect race conditions and async issues
• Identify off-by-one errors, null/None problems, and memory leaks
• Review concurrency behavior and hidden edge cases
• Identify production risks early

Improve System Performance

• Analyze scalability and Big-O complexity
• Detect N+1 queries and inefficient backend logic
• Identify unnecessary React re-renders
• Find bottlenecks affecting reliability or responsiveness

Review Security & Infrastructure Risks

• Evaluate systems against OWASP Top 10 risks
• Detect SQL injection vulnerabilities and secret leaks
• Review unsafe input handling and path traversal risks
• Evaluate dependency vulnerabilities (CVEs)
• Review Tauri IPC sandbox/security issues

Evaluate Testing Standards

• Review pytest, vitest, and cargo test implementations
• Identify weak coverage and missing edge cases
• Evaluate TDD quality and mocking approaches
• Detect gaps between “tests passing” and real reliability

Work Across Modern Tooling

• Use ruff, mypy, eslint, and clippy
• Review Git diffs and PR workflows
• Read and evaluate API integration code
• Detect misuse of OpenAI, Anthropic, or Gemini SDKs
• Review REST/WebSocket reliability patterns (retry logic, idempotency, etc.)

What You Bring

• Strong experience as a Senior or Staff-level Software Engineer
• Deep expertise in Python 3.11+
  • Typing
  • Async programming
  • Pydantic
• Strong TypeScript 5+ and React 19 experience
• Ability to read and evaluate Rust code (Tauri 2 ecosystem)
• Strong understanding of software architecture and engineering quality
• Experience reviewing unfamiliar codebases quickly
• Strong debugging and analytical skills
• Confidence giving direct, critical technical feedback
• Ability to prioritize issues by severity (Critical / Major / Minor)
• Upper-Intermediate English or higher
• German reading skills required (comments, commits, and technical discussions may partially be in German)

Nice to Have

• Experience reviewing ffmpeg or Pillow pipelines
• Familiarity with Vector DB or ONNX-related code patterns
• Experience in trading, fintech, or high-reliability systems

What You Get

• Engineering-First Environment: Work with teams that care about architecture, maintainability, and technical correctness - not just feature velocity.
• Real Technical Influence: Your feedback will directly impact engineering standards, code quality, and technical decisions.
• Complex Systems: Trading infrastructure, async workflows, performance-sensitive systems, and real-world scalability challenges.
• Direct Communication Culture: The company values honest technical feedback, critical thinking, and engineering maturity over hierarchy or corporate formalities.
• Strong Autonomy: No micromanagement. Engineers are trusted to make technical judgments and take ownership.

Ready to Work Where Code Quality Actually Matters?

If you enjoy analyzing complex systems, identifying critical issues before production does, and working in a direct, high-level engineering environment —

👉 Apply now and help improve systems built for reliability, performance, and scale.

About the role

We are building a revolutionary system at the frontier of technology and AI.

As a AI-native Engineer, you won’t just write code — you will shape the future of how apps are built. You’ll be part of the early execution engine—shipping core capabilities, refining the experience, and elevating reliability. Expect tight loops, clear ownership, and visible impact. You'll engage directly with first clients, adapt the platform to their needs, and set the stage for the next generation of software creation.

What we’re looking for

We want someone who doesn’t just “fit the role” but defines it:

• Open-minded explorer: ready to try bold ideas, new approaches, and cutting-edge tools.
• Hacker mindset & problem solver: able to connect the dots across complex systems and find elegant solutions.
• Analytical and resilient: thrives in debugging intricate, interconnected architectures.
• Startup speed enthusiast: comfortable hacking fast, shipping early, learning from feedback, and polishing later.
• Experienced in Cursor, Claude Code or other AI coding assistants.
• Passionate about AI-driven Engineering: turning AI into your engineering team-mate.
• Natural leader: with the drive to inspire and guide people.

Why join us?

• Be among the first engineers driving a bold, world-changing vision.
• Work at the bleeding edge of technology and AI, where experimentation is not just allowed but expected.
• Direct influence on product.
• A chance to build something that reshapes how things get done in today’s world.
• A team that values curiosity, creativity, and the pure joy of hacking together the future.

This isn’t just another job. This is your chance to engineer the future of software itself.

Technical stack 

!Prior experience with these technologies isn't mandatory, provided you demonstrate a strong willingness to learn and leverage AI tools. At the end of the day, we consider these to be just tools wielded by a SE.

Core technologies:

• TypeScript, React.js, Next.js, Bun.
• ClickHouse, PostgreSQL, Redis
• Docker / Kubernetes
• Kafka
• Supabase, Inngest, Posthog

Nice to have:

• Vue.js
• Python
• Go
• Ruby

Hiring Process

Stage 1: Interview with HR (1h).

Stage 2: Interview with VP of Engineering.

Stage 3: Tech. Interview

Stage 4: Interview with the team.

What we offer for your success

• Very warm and friendly working environment and flexible working schedule.
• 20 days off + paid national holidays, and 12 sick days paid by the company per year.
• Medical insurance, and health protection programs (with COVID-19 and dental coverage).
• Continuous professional development and growth opportunities.

Senior Full Stack Engineer

We’re building the Production ready system from the PoC and looking for a Senior Full Stack Engineer who enjoys creating scalable products and taking ownership of real technical decisions. You’ll work closely with product and design teams, shape parts of the architecture, and help turn ideas into a production-ready platform.

Requirements:

• 5+ years of software development experience with JavaScript, TypeScript, and modern ES6+
• Strong experience with React and Next.js
• Strong experience with backend development using Node.js / NestJS
• Hands-on experience with MongoDB and PostgreSQL
• Hands-on experience with MQTT
• Experience building applications that can be deployed on both OnPrem and Cloud platforms
• Experience building scalable applications and contributing to system architecture
• Ability to take ownership of features and technical solutions
• Comfortable working in fast-paced, product-driven environments
• Strong communication skills and ability to collaborate with both technical and non-technical stakeholders
• Upper-Intermediate English (B2+)

Nice to Have:

• Experience with React Native or WebSockets
• Experience working in startup or early-stage environments
• Experience with Azure, IoT Hub, Microsoft Entra ID
• Previous experience mentoring engineers or contributing to technical leadership

Responsibilities:

• Develop and deliver key features of a new product from concept to launch
• Contribute to the design and implementation of scalable frontend and backend architecture
• Collaborate closely with product, design, and engineering teams
• Take ownership of technical solutions and help drive implementation
• Participate in code reviews and maintain high engineering standards
• Contribute to development best practices and team workflows
• Support and mentor less experienced engineers when needed
• Continuously improve performance, reliability, and scalability of the platform.

We are looking for a technically strong Full Stack / DevOps Engineer with iGaming experience who can independently maintain and develop server infrastructure, build backend and frontend solutions, automate SEO team workflows, and integrate AI tools into daily operations.

What We’re Looking For

Server Infrastructure

• Deployment and configuration of VPS / dedicated servers
• DNS and SSL management
• Backup setup and maintenance
• Uptime monitoring
• Fast incident response

Backend

• Hands-on development experience with Python or PHP
• Working with databases and task queues

Frontend

• Strong HTML/CSS and JavaScript / TypeScript skills
• Ability to independently build and deploy frontend applications without relying on a separate frontend developer

LLM & AI Tools

• Practical experience integrating OpenAI API / Claude API / local models
• Prompt engineering
• Building automation chains and LLM-powered utilities

Security & Isolation

• Understanding of basic server and website security principles
• Experience with Cloudflare (WAF, Page Rules, IP rotation)
• Access management

Understanding of iGaming

• Familiarity with infrastructure and products in the niche
• Experience working with multisite setups or drop networks is a strong advantage

Nice to Have

• Experience building SaaS products from scratch: from architecture and MVP to launch
• Building server infrastructure for specific use cases: drop networks, multisites, PBN infrastructure
• Automation via scripts: parsing, API integrations (Ahrefs, GSC, Majestic), data processing, Telegram bots

Responsibilities

• Maintaining and monitoring infrastructure: servers, websites, internal tools — ensuring uptime, performance, and timely incident response
• Developing automation tools for the SEO team: parsers, domain screening scripts, monitoring dashboards, API integrations
• Integrating LLMs into team workflows: AI assistants, automated content generation and processing pipelines, internal chatbots
• Handling technical tasks from management: new features, bug fixes, environment setup, deployment of updates within the product roadmap
• Launching new projects: fast deployment of websites and services, CMS setup, DNS, SSL, redirects
• Documenting solutions: architectural decisions, deployment instructions, and configurations to ensure processes are not dependent on one person

What We Offer

• Fully remote work with a flexible schedule
• Paid vacation and sick leave
• Modern stack with no legacy code — we build and choose our own tools
• Direct communication with management, no bureaucracy
• Interesting technical challenges in a fast-paced SEO / iGaming niche

Domain: Banking & Finance
Experience: 6+ years
Project Duration: June 1, 2026 – December 31, 2026
Format: Hybrid
Location: Kraków, Poland

About the Project

We are looking for a Python Engineer / Full-Stack Developer to join a team developing modern digital solutions for the banking and finance domain.

The role combines backend development with Python and FastAPI, frontend development with React.js, and participation in AI-powered initiatives using modern GenAI frameworks and tools.

Responsibilities

• Develop scalable and maintainable web applications using Python and FastAPI
• Contribute across the full stack, including frontend development with React.js
• Design, optimize, and maintain SQL, NoSQL, and vector databases such as PostgreSQL, Redis, and PGVector
• Build and support cloud-based solutions using AWS services
• Use Docker and Kubernetes for containerization and orchestration
• Design and integrate RESTful APIs and backend services
• Implement CI/CD pipelines, automated testing, and deployment best practices
• Collaborate with cross-functional teams to deliver reliable and scalable software solutions
• Contribute to GenAI-powered applications using technologies such as LangChain and OpenAI APIs

Requirements

• Strong proficiency in Python and experience building backend services with FastAPI
• Experience developing frontend applications with React.js
• Solid understanding of RESTful API design and distributed systems
• Hands-on experience with LangChain, OpenAI APIs, or similar AI frameworks
• Experience working with relational, NoSQL, and vector databases
• Familiarity with PostgreSQL, Redis, and PGVector or similar technologies
• Experience working with AWS cloud services
• Practical knowledge of Docker and Kubernetes
• Understanding of CI/CD workflows, automated testing, and deployment pipelines
• Strong debugging, problem-solving, and software engineering skills
• Ability to collaborate effectively in Agile and cross-functional teams
• Fluent English

Tech Stack

• Python
• React
• RESTful APIs
• Oracle NoSQL
• PostgreSQL
• Redis
• AWS
• Docker
• Kubernetes
• CI/CD
• LangChain

Nice to Have

• LangGraph
• LangSmith
• ETL & Data Management Tools

Location

• Hybrid from Kraków, Poland
• Important: the client requires office visits in Kraków once per week

Recruitment Process

• Technical interview with external partner (Karat)
• 1.5-hour technical interview with the end client
• Cultural fit interview

About Forager.ai

Forager.ai is a leading provider of person and organization data, powering enrichment, search, and discovery for B2B platforms worldwide. Our APIs and bulk data feeds deliver billions of data points daily — used by waterfall enrichment platforms, data resellers, and B2B intelligence products to power their own customer experiences.

The Role

You'll build and operate the systems that deliver Forager's data to platform customers at scale: customer-facing apps, large-scale data pipelines, and search infrastructure. These are the surfaces our customers evaluate us on during competitive bakeoffs and rely on every day in production. You'll own end-to-end implementation across the stack — design, build, deploy, monitor, and iterate.

This is a senior, high-ownership role. You'll have direct input into product direction and the freedom (and responsibility) to ship work that materially moves our coverage, accuracy, latency, and uptime metrics.

What You'll Build

• Real-time enrichment APIs — person/org lookup, contact data, reverse search for waterfall platforms. Match rate, latency, and freshness directly drive customer value.
• Bulk data feed delivery — maintain the Snowflake service delivering billions of data points daily to Data Feed customers powering people/company search.
• Elasticsearch search infrastructure — indexing, query design, relevance tuning, and cluster scaling for person/company search and filtering APIs.
• ETL pipelines — workers, task queues, and transformations moving data into APIs and feed exports while maintaining fill rates and accuracy.
• Customer-facing web app and developer experience — React/TypeScript app, docs, onboarding flows, and self-serve surfaces.

Core Responsibilities
 

Product & Application Development

• Build and maintain Forager's customer-facing web app (React, TypeScript, Django/Python).
• Implement and maintain RESTful APIs for integrations, feeds, and platform customer workflows.
• Develop scalable backend services — workers, task queues, data pipelines — that keep refresh cycles predictable and fill rates high.
• Participate actively in product planning; help shape which features have the highest customer impact.
   

Search, Data Layer & ETL

• Build and operate Elasticsearch indices for people/company search — schema, ingestion, relevance, scaling.
• Design and operate ETL applications moving data into searchable stores, feeds, and warehouses (Snowflake, S3).
• Optimize PostgreSQL — query performance, indexing, cache utilization.
• Drive measurable improvements in latency, uptime, error rate, and scalability.
   

DevOps & Infrastructure

• Own day-to-day AWS infrastructure (ECS, S3, etc.) alongside DevOps.
• Operate CI/CD, observability (Grafana, CloudWatch, Sentry), and on-call response for the surfaces you build.
• Share crawler infrastructure maintenance with the team.
   

Collaboration & Quality

• Code review with high standards for readability, security, and performance.
• Write unit, integration, and E2E tests — test reliability is a quality contributor, not overhead.
• Document features, architecture, and API contracts; great developer docs are how our customers succeed.
   

What We're Looking For

Required Experience

• 5+ years building and operating production web applications and APIs.
• Strong proficiency in Python / Django and React / TypeScript .
• Hands-on experience operating Elasticsearch at scale — schema design, query tuning, cluster management.
• Production experience with PostgreSQL , Redis , and async task systems ( Celery / RabbitMQ or equivalent).
• Demonstrated track record building and operating ETL pipelines that move significant data volumes reliably.
• Comfortable with AWS (ECS, S3, CloudWatch) and CI/CD pipelines (GitHub Actions or equivalent).
• Experience operating services in production — observability, on-call, incident response.
• Strong written communication; comfortable owning documentation as a deliverable.
   

AI & Agentic Workflows (Required)

This is non-negotiable. You must demonstrate strong, hands-on fluency with:

• AI coding tools (Claude Code, Cursor, Copilot, or equivalent) used daily for implementation, refactoring, and code review.
• Agentic workflows — designing, orchestrating, and debugging multi-step agent pipelines (e.g., research → plan → implement → verify loops, MCP server integration, tool-use design).
• Judgment about where AI helps vs. hurts — knowing when to delegate to an agent, when to write the code yourself, and how to keep an agent on rails for production work.
   

We evaluate this in interviews with live exercises. Candidates without demonstrable agentic workflow experience will not be considered.

Nice to Have

• Experience with Snowflake or other data warehouses.
• Background in B2B data products — enrichment, contact data, company data, search/discovery.
• Experience with web crawling, data sourcing, or large-scale ingestion systems.
• Open-source contributions or public technical writing.
   

Job Description

Job Description
7+ years of experience in software development, with a focus on C#, React, and .NET Core.
1+ years of experience leading engineering teams and mentoring developers.
Strong knowledge of object-oriented programming, design patterns, and modern software architectures (e.g. serverless, microservices, containerized, etc.).
Proficiency in front-end development using React.js and modern JavaScript/TypeScript frameworks.
Experience with cloud platforms (e.g., Azure, AWS, or GCP). - Azure preferred
Solid understanding of CI/CD pipelines, unit testing, and deployment automation tools.
Excellent problem-solving skills and ability to work in a fast-paced, agile environment.
Strong communication skills and experience collaborating with cross-functional teams.
Experience working with Azure DevOps for task tracking and code repository would be a plus.
Experience working with AI-based productivity tools would be a plus.
Experience with NextJS and Syncfusion UI component library would be a plus.

Job Responsibilities

Lead a team of engineers in designing, developing, and deploying high-quality applications using C#, React, and .NET Core working on one of the workstreams on the project in Healthcare domain.
Collaborate closely with Product Owner, Product Manager, System Architect and other stakeholders to understand project requirements and deliver robust technical solutions.
Architect scalable and maintainable software solutions adhering to best practices and industry standards.
Oversee the full software development lifecycle, including planning, coding, testing, and deployment.
Conduct regular code reviews and mentor team members to ensure technical excellence and professional growth.
Adopt agile practices and continuous integration/continuous deployment (CI/CD).
Troubleshoot complex technical issues and optimize performance of applications.
Foster a collaborative, high-performing, and results-driven engineering culture.

Department/Project Description

Client is a leading global Contract Research Organization (CRO) that provides Phase I-IV clinical trial management, market access, and technology solutions with over 30 years of experience.

Skill Category

.NET

Hi. I'm hiring one developer to help me ship features and fix bugs on Dr.Fit, a fitness and nutrition app with thousands of active users. React Native + Go + Postgres.

I'm not a developer myself. I've been shipping production code for months using Claude Code and Cursor. It works. I want to hire someone who can do this faster and better than me, for one focused part-time role.

THE ROLE
- $600/month, flat. Paid via Wise.
- 4 hours/day, Monday to Friday. You pick your hours.
- Remote. Anywhere in Ukraine.
- Two-week paid trial first ($250). If we both want to continue, we commit.

WHAT YOU'LL DO
- Fix bugs in the React Native app
- Build small and medium features across frontend, Go backend, and support tooling
- Open PRs. I review and merge to production.
- Daily async written standup plus 1 to 2 short calls per week.

If this works out, more hours and more pay are on the table. We figure that out based on what you ship, not a calendar.

WHO I'M LOOKING FOR
- You use Claude Code, Cursor, or similar AI tools every day. Heavily.
- You ship things. You finish them. You don't disappear mid-task.
- English: confident written and spoken. We'll talk on calls.
- You read unfamiliar code and figure things out without hand-holding.
- You care about whether the user's app works, not whether the architecture is pretty.
- You tell me when something is broken or worth building. I don't want to manage you.

WHAT I DON'T CARE ABOUT
- CS degree
- 5 years of experience
- Whether you already know Go or React Native (you'll learn fast with AI)
- LeetCode

HOW TO APPLY
There's a test task on GitHub. It's small (10 to 60 minutes), public, and replaces the CV:

https://github.com/YordanBahov-bg/dr-fit-hiring-test

Fork it. Investigate. Fix what's broken. Add the small feature. Record your full session (Loom's 5-minute free cap won't fit, figure out what works for you, that's part of the test). Open a PR back to the repo.

I respond to every submission within 48 hours.

That's it. No CV needed.

Yordan
 

Meet the YozmaTech

YozmaTech isn’t just another tech company – we’re a global team of go-getters, innovators, and A-players helping startups and product companies scale smarter and faster.

We build dedicated development teams across 10+ countries, creating strong, long-term partnerships based on trust, transparency, and real impact.

Here, every idea counts. We value people who are proactive, open-minded, and ready to grow. If you’re passionate about building meaningful products and want to join a team that feels like family – you’ll feel right at home with us.

Our client is building an innovative AI-powered platform that transforms how the world’s largest companies manage their real estate assets. The solution leverages the latest advancements in artificial intelligence and large language models (LLMs) to automate complex workflows, analyze massive datasets, and provide instant, intelligent answers to business-critical questions.

Their clients are large global enterprises managing thousands of real estate properties worldwide. Traditionally, real estate departments rely on manual processes and third-party services that can take weeks or months to deliver results. With this platform, these processes are automated and accelerated — what used to take months now takes minutes.

Bonus Points:
🔹Work with cutting-edge AI and LLM technologies
🔹Opportunity to solve complex, real-world enterprise problems
🔹High impact work used by global enterprise clients
🔹Full ownership across the full development lifecycle
🔹Fast-paced learning environment with modern technologies
🔹Small, agile, and highly collaborative engineering team

Key Requirements:
🔹 3+ years of experience as a Full Stack Developer;
🔹 Strong experience with modern frontend frameworks (Angular 18+ preferred or strong React + TypeScript);
🔹 Backend experience with Node.js (NestJS is a plus) or similar frameworks (.NET with willingness to transition to Node/NestJS);
🔹 Strong proficiency in TypeScript / JavaScript;
🔹 Hands-on experience integrating AI/LLM features (OpenAI API, ChatGPT-based features, etc.);
🔹 Experience using AI tools for development (Cursor, GitHub Copilot, ChatGPT, Claude, etc.);
🔹 Solid understanding of relational and/or NoSQL databases;
🔹 Familiarity with cloud infrastructure and CI/CD pipelines;
🔹 Ability to independently deliver complex end-to-end features;
🔹 Up-to-date knowledge of modern frameworks and willingness to learn quickly;
🔹 English – Upper-Intermediate or higher.

What you will do:
🔹 Develop and maintain full-stack features across frontend and backend components;
🔹 Build and integrate AI/LLM-powered functionality into the platform;
🔹 Design scalable and efficient backend services and APIs;
🔹 Work with databases, including schema design and query optimization;
🔹 Collaborate with product and engineering team to deliver end-to-end solutions;
🔹 Participate in architectural decisions and system design;
🔹 Contribute to infrastructure and CI/CD improvements;
🔹 Ensure code quality through best practices, code reviews, and testing;

Interview stages:
🔹 HR Interview;
🔹 Technical Interview;
🔹 Interview with VP R&D - (30 min)
🔹 Culture Fit Interview with HR (Client-side HR) - (30 min)
🔹 Reference Check;
🔹 Offer;

Why Join Us?

At YozmaTech, we’re self-starters who grow together. Every day, we tackle real challenges for real products – and have fun doing it. We work globally, think entrepreneurially, and support each other like family. We invest in your growth and care about your voice. With us, you’ll always know what you’re working on and why it matters.
From day one, you’ll get:
🔹 Direct access to clients and meaningful products;
🔹 Flexibility to work remotely or from our offices;
🔹 A-team colleagues and a zero-bureaucracy culture;
🔹 Opportunities to grow, lead, and make your mark.

After you apply

We’ll keep it respectful, clear, and personal from start to offer.
You’ll always know what project you’re joining – and how you can grow with us.

Everyone’s welcome

Diversity makes us better. We create a space where you can thrive as you are.

Ready to build something meaningful?

Let’s talk. Your next big adventure might just start here.

On behalf of our Client from France, Mobilunity is looking for a Full-Stack Engineer.

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.

Their goal is to become the #1 growth platform for Restaurants. They believe that restaurants have become lifestyle brands, and with forward-thinking digital products, restauranteurs will create the same perfect experience online as they already do offline, resulting in a more valuable, loyalty-led business.

You’ll be building and evolving the systems that power multi-location restaurant groups across Europe. Your primary playground is PHP/Laravel on the backend, and you’re comfortable navigating a TypeScript/React frontend codebase, contributing to frontend services when needed.

Beyond the code, they are looking for someone who genuinely enjoys thinking about architecture – someone who forms opinions, defends them with data, and changes their mind when shown a better path. They want a builder who is naturally drawn to new technologies and sees AI-assisted development not as a gimmick, but as a real productivity multiplier.

Responsibilities:

• Develop and maintain backend and frontend services using Laravel and TypeScript
• Design, document, and defend architectural decisions for new features and refactors, in collaboration with the other developers of the team
• Design and optimize backend systems and databases to serve client’s customers
• Investigate, diagnose, and resolve application-related issues in production
• Collaborate with the Product Manager, Designer, and the other developers of the team to scope and deliver new features on a regular basis
• Participate in code reviews and mentoring to maintain engineering excellence across the squad

Requirements:

• 5+ years of professional software development experience, with PHP/Laravel as your primary backend stack
• Solid TypeScript skills and hands-on experience with TypeScript – you can read, write, and review frontend code confidently
• Strong SQL knowledge – you write queries, understand indexes, and can reason about query performance
• Proven ability to articulate and justify architectural decisions: weighing trade-offs around scalability, maintainability, and explaining the reasoning clearly to peers and stakeholders
• Fluency with REST API design and experience consuming or building JSON integrations
• Comfortable working in Git-based workflows with pull requests, branches, and CI gates
• Active user of AI development tools (Claude Code, Cursor, Copilot, or similar) – you’ve integrated these into your daily workflow and are curious about pushing them further
• A track record of working in Agile environments with cross-functional teams
• Upper-intermediate to advanced English proficiency

Nice to have:

• Experience with React and/or Next.js
• Knowledge of cloud infrastructure (AWS) and containerization (Docker)
• Familiarity with Keycloak (OIDC/OAuth2, B2B/B2C realm configuration, identity providers)
• Exposure to Domain-Driven Design (DDD) or hexagonal/clean architecture patterns
• Experience with state management libraries (MobX, Redux, Zustand, etc.)

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

UITOP, a design & development team. We help B2B SaaS products feel simple, modern, and easy to use.
We are building a pool of Full Stack Developers for future opportunities. This allows us to quickly reconnect when relevant roles open up, especially for projects using our core stack stack of React and Node.js. You will work on SaaS and data-heavy systems, diving deep into business logic from day one, with a real influence on technical and product decisions.

Requirements

• 2-4 years of experience as a Full Stack Developer, specifically with React.js and Node.js
• Strong expertise in TypeORM, Webpack, PostgreSQL, and Redis
• Proficiency with Express.js or NestJS for building scalable systems that can handle complex ERP business logic.
• Use AI tools (AI agents, Claude Code, Cursor, Codex or similar) in daily workflow. 
• Apply your experience in building SaaS or data-heavy applications, including CRM/ERP.
• Deep knowledge of Material-UI (MUI) and RESTful API design. 
• Upper-Intermediate English (B2) for effective communication and technical discussions. 

Benefits

• Competitive salary with regular performance and salary reviews. 
• Working with complex large-scale SaaS projects, from 6 months.
• 18 working days of vacation and 10 sick days.
• 50% coverage of English and professional courses.
• Financial compensation of coworking 100% (during blackouts).
• The opportunity to influence the project with your decisions. 
• Flexible work schedule, remote.
  
  We’re excited to meet someone who shares our vibe. We are looking for a highly motivated and talented individual to join our team. If this sounds like your next big challenge, let’s chat! 
   

About the Company

BotsCrew is an AI-focused software company with over 10 years of experience building custom AI solutions for businesses worldwide. Starting as a chatbot development company, we have evolved into a team specializing in Generative AI, AI Agents, and intelligent automation solutions.

We help companies across healthcare, fintech, e-commerce, HR tech, and other industries integrate AI into real products and business processes. Our team works with modern AI technologies, including OpenAI, Anthropic, Gemini, LangChain, RAG systems, and AI workflow automation.

About the Role

As a Full Stack Developer at BotsCrew, you’ll build and scale AI-powered features for real client products — with Java as your primary backend language and React/Next.js on the frontend. This is a hands-on engineering role where you’ll own features from design through delivery, working on systems that combine solid backend architecture with applied AI capabilities.

We focus on building robust, production-grade solutions that integrate LLMs, intelligent pipelines, and automation into client workflows. We’re looking for engineers who are strong in Java, comfortable across the full-stack, and have real experience shipping AI-driven functionality — not just experimenting with it.
 

Requirements

Must Have

• 2+ years of commercial experience in backend or full-stack development
• Strong hands-on experience with Node.js or Python
• Experience with modern frontend frameworks: React.js or Next.js
• Solid understanding of RESTful API design and integration
• Experience with Docker for local development and deployment
• Familiarity with CI/CD pipelines (e.g., GitHub Actions, GitLab CI)
• Hands-on experience with cloud infrastructure — AWS, GCP, or Azure
• Real, commercial or project-based experience with AI/LLM technologies: working with LLM APIs (OpenAI, Claude, Gemini), prompt engineering techniques, embeddings and vector search, RAG pipelines or AI-driven product features
• English B2 or higher

Nice to Have

• Hands-on experience building AI assistants or autonomous agents
• Experience with vector databases (e.g., Pinecone, Weaviate, Qdrant)
• Familiarity with agentic frameworks (e.g., LangChain, LlamaIndex)
• Experience with Java or willingness to work with it on cross-team projects
• Contributions to open source or personal AI projects

Responsibilities:

• Build and maintain backend APIs using Node.js or Python
• Design and improve frontend interfaces using React.js and Next.js
• Develop LLM-based features — prompt pipelines, embeddings, vector storage, and AI-driven functionality
• Write clean, testable, and well-documented code with long-term maintainability in mind
• Contribute to platform architecture and scalable solution design
• Collaborate with clients and stakeholders to gather requirements and deliver measurable value
• Participate in agile ceremonies — stand-ups, retrospectives, and sprint planning
   

We Offer:

• 20 working days of paid vacation
• 5 days of paid sick leave
• Equipment provided
• Access to Regus coworking spaces when needed
• FOP (private entrepreneur) accounting and support services
• ChatGPT for Business provides access to support productivity and AI experimentation
• Personal Development Plan (PDP) creation and guidance from mentors
• A talented team and a culture that blends innovation, speed, and real business impact