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August 8, 2026
Fullstack Engineer (AI, Distributed Systems, Automation)
Mid • Remote
14,000 - 20,000 PLN
Krakow, MA, Poland
We’re looking for a Fullstack Engineer who enjoys building complex systems, integrating external services, and leveraging AI tools to speed up development and automate workflows. This role combines modern frontend development with AI-driven workflows and automation tools such as Claude Code, Cursor, and LLM frameworks.
What You’ll Do
- Develop and contribute to end-to-end features across SaaS products and internal tools, collaborating with senior engineers on architecture and implementation decisions.
- Build modern, high-performance frontends using Next.js and React.js.
- Develop scalable backend services using Node.js and NestJS.
- Design and integrate APIs, including REST, WebSockets, and external services.
- Build and maintain automation workflows and background jobs.
- Work with async systems, queues, and event-driven architectures.
- Integrate third-party services with real-world constraints, including rate limits, retries, and authentication flows.
- Use AI tools to improve development speed, testing, and automation.
- Collaborate directly with product, data, and leadership teams.
- Build MVPs, proof-of-concepts, and new product ideas from scratch.
- Rapidly validate business ideas through experimentation and iteration.
- Help evolve successful prototypes into production-ready systems.
AI & Automation
This role includes working with modern AI tooling and automation systems, with a strong focus on speed, ownership, and execution.
- Use tools such as Claude Code, Cursor, and OpenAI SDK in daily development.
- Build AI-driven workflows and integrations quickly and iteratively.
- Automate repetitive processes, including data handling, content, and integrations.
- Apply LLMs in production with a pragmatic, results-first approach.
- Take ownership of problems from idea to production.
- Ship quickly, test in real conditions, and iterate based on outcomes.
- Be accountable for end-to-end delivery.
- Prioritize execution over perfection.
What We’re Looking For
- 2.5+ years of professional full-stack experience.
- Strong frontend skills in React.js and Next.js.
- Backend experience with Node.js; NestJS preferred.
- Experience integrating external APIs, including authentication, pagination, retries, and rate limits.
- Hands-on experience with modern AI tools such as OpenAI, Claude, and Cursor.
- Good SQL skills; PostgreSQL preferred.
- Experience with async processing, queues, and background jobs.
- Understanding of reliable systems, including error handling, retries, and observability.
- Strong communication skills and ability to work cross-functionally.
- Fluent English and Polish.
Nice to Have
- Experience with Rust, including async, Tokio, and Axum.
- Experience with Elixir, including Phoenix LiveView and GenServer.
- Understanding of distributed systems and architectures.
- Experience with multi-region deployments and geo-distributed infrastructure.
- Experience building systems with high parallelism and large numbers of concurrent workers.
- Familiarity with distributed databases and data-consistency trade-offs.
- Experience with multi-tenancy architectures, including tenant isolation and scaling strategies.
- Experience working with high-throughput event pipelines.
Our Tech Stack
- Frontend: Next.js, React.js.
- Backend: Node.js, NestJS, Golang, Elixir, Rust.
- Data: PostgreSQL, BigQuery, ClickHouse.
- Infrastructure: AWS, Fly.io, Google Cloud, DigitalOcean.
- Queues & Workers: LavinMQ, BullMQ, Kafka.
- CI/CD: GitLab CI.
- AI/ML & Automation: Proprietary GenAI models, OpenAI, Claude, internal tooling.
- Integrations: REST, gRPC, WebSockets, external APIs with rate limits.
Why Join Us?
- Work on high-scale SaaS systems processing hundreds of millions of events daily, with real-time pipelines and data-heavy workloads.
- Ownership from day one, with influence over architecture, technology choices, and product direction.
- Collaborate with engineers, AI specialists, and product managers.
- Explore cutting-edge frameworks and architectures.
- Fast execution with minimal bureaucracy and unnecessary meetings.
- Opportunity to work with modern AI tooling in production.
- Competitive senior-level compensation and career growth.
- Contribute to automation products that empower businesses and communities.
Hiring Process
- Initial call.
- Technical deep dive with the team.
- Decision.
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Optimizing code for performance, maintainability, and scalability across both frontend and backend. Conducting code reviews and contributing to documentation and best practices (SOLID, DRY, KISS). Participating in Agile processes, continuous delivery, and mentoring less experienced developers. Leveraging AI tools in day-to-day work to enhance productivity and output quality. Sharing knowledge and contributing to a collaborative learning culture within the team. What We're Looking For 3+ years of experience with JavaScript/TypeScript in a fullstack role. Strong proficiency in Node.js and Express.js. Strong proficiency in React and modern frontend development patterns. Familiarity with relational databases (e.g. PostgreSQL, MySQL). Understanding of authentication/authorization mechanisms (OAuth2, JWT). Hands-on knowledge of Git, Docker, and Linux CLI. Familiarity with DevOps practices and CI/CD pipelines. Proactive and curious mindset — comfortable working in dynamic, evolving project environments. Fluent English communication, able to collaborate effectively across international teams. Nice to Have Experience with microservices architecture. Familiarity with MS Azure services (Web App, Storage, Azure DevOps). Knowledge of web application security best practices. Experience with JS testing frameworks (Jest or similar). Experience mentoring or leading small teams. Here's why you'll love Cloudfide Benefits: MyBenefit platform / Multisport Enel‑Med private medical care Professional Growth: Annual 2,000 PLN development budget Access to e‑learning platforms Real opportunities to expand responsibility and lead initiatives — most of our Leads come from internal promotions As the company continuously grows, you get real opportunities to expand your responsibilities, explore new areas, and even take ownership of your own initiatives. Work Environment: Long-term cooperation: UZ or B2B (we value stable, lasting relationships) Remote-first, work from anywhere in the world (workation) Flexible hours & strong focus on work-life balance Collaboration with top engineers you can truly learn from Flat structure — every voice counts, and you help shape the company Culture & Integration: Company-wide trips (including international ones) Team integration budgets Open communication and supportive, passionate teams Equal Opportunities CLOUDFIDE is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.
Technology
N-iX
Senior Full-Stack Python Engineer
Senior
Remote
Krakow, Poland
6,000 - 7,100 USD
🏢 Summary: Senior Full-Stack Engineer role focused on building and scaling an AI-powered document processing and automation platform in a cloud environment. The position involves developing backend services in Python and front-end applications in TypeScript while delivering scalable APIs, microservices, and data workflows. The role requires hands-on contribution to architecture, cloud deployment, and integration of AI-driven features. 🗂️ Requirements: 6+ years of professional software engineering experience, Strong proficiency in Python, Experience with FastAPI, Flask, or Django, Solid experience with TypeScript, Experience with React or Next.js, Hands-on experience designing and implementing microservices, Experience building and integrating REST APIs, Strong knowledge of relational or NoSQL databases, Experience with AWS or Azure, Familiarity with CI/CD pipelines, Experience with Docker, Proficiency with Git, Understanding of scalability, reliability, performance, and security principles 📃 Skills: Python, FastAPI, Flask, Django, TypeScript, React, Next.js, REST, Microservices, PostgreSQL, MySQL, MongoDB, Firestore, AWS, Azure, Docker, Git, CI/CD 🏢 Description: Client Overview Our client is a global UK-based financial services and investment banking organization developing an AI-powered document processing and automation platform used across multiple business units. The platform focuses on large-scale data processing, workflow automation, integration with internal systems, and delivering modern digital capabilities for the wider banking group. Position Overview We are looking for a Senior Full-Stack Engineer to join a cross-functional engineering team building core components of the AI-driven document processing platform. This position requires strong backend engineering experience with Python as well as solid front-end or full-stack proficiency with TypeScript (preferably React, Next.js, or similar frameworks). You will work on delivering scalable APIs, microservices, data workflows, and UI components that power document automation features, internal tools, and operational dashboards. The role involves close collaboration with product, architecture, GenAI, and platform engineering teams. This role is ideal for someone who is hands-on, highly technical, and comfortable designing, developing, and deploying production-grade systems in cloud environments (preferably Google Cloud). Key Responsibilities Design, develop, and maintain backend services using Python (FastAPI, Flask, Django, or similar frameworks). Build front-end components and UIs using TypeScript (React, Next.js, or similar frameworks). Develop and integrate REST APIs and microservices, ensuring strong performance, reliability, and observability. Collaborate closely with GenAI engineers to integrate AI-driven features and document-processing flows. Implement data processing pipelines for structured and unstructured data. Contribute to the platform’s architecture, design patterns, and technical decision-making. Write automated tests and ensure a high level of code quality, maintainability, and security. Partner with product managers, designers, and QA engineers to deliver high-quality solutions on time. Document code, service interfaces, workflows, and architectural decisions. Requirements 6+ years of professional software engineering experience, with significant work in both backend and full-stack roles. Strong proficiency in Python (FastAPI, Flask, Django, or similar). Solid experience with TypeScript and modern front-end frameworks (React, Next.js, or similar). Hands-on experience designing and implementing microservices, APIs, and backend systems. Strong understanding of databases: relational (PostgreSQL, MySQL) and/or NoSQL (MongoDB, Firestore). Experience with any cloud providers (AWS/Azure). Familiarity with CI/CD pipelines, Docker, Git, and modern DevOps practices. Strong understanding of software engineering principles: scalability, reliability, performance, and security. Experience working in agile, cross-functional teams on complex products. Excellent communication skills and ability to work with both technical and non-technical stakeholders. Nice to Have Experience working with AI/ML or GenAI-driven systems. Experience with Google Cloud Platform Familiarity with Vertex AI, Gemini, or integration with LLM-powered services. Experience with WebSockets, event-driven architectures, or Pub/Sub. Knowledge of authentication/authorization standards (OAuth2, JWT, IAM). Experience with document processing, OCR, or workflow automation.
Technology
AgileEngine
Full Stack Developer
Mid
Remote
Krakow, MA, Poland
2,000 - 4,650 USD
🏢 Summary: Full Stack Developer role focused on building and integrating LLM-powered features across React frontend and Python backend systems. The position involves working directly with APIs such as Claude and OpenAI to deliver AI-driven functionality while collaborating closely with product, QA, and engineering teams in EST overlap hours. Ideal for engineers with hands-on LLM integration and modern web development experience. 🗂️ Requirements: Commercial experience with LLMs (Claude, OpenAI APIs, similar, or custom integrations), Minimum 1 year of React experience (hooks, state management, component-driven development), Minimum 1 year of Python experience in API development and backend logic, Experience working in distributed teams with active collaboration, Upper-intermediate English level 📃 Skills: React, Python, LLM, Claude, OpenAI, API, FastAPI, AI, Prompting 🏢 Description: ID63542 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. 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 We are looking for a Full Stack Developer to build and integrate LLM-powered features across frontend and backend systems. You will develop React components, extend Python backend services, and work directly with LLM APIs — including Claude, OpenAI, or similar — to deliver AI-driven product functionality. The role requires close collaboration with product, QA, and engineering teams with active overlap in EST hours. What you will do Develop and integrate LLM-based functionality, including prompt engineering, API-based model usage, and AI workflows; Build and maintain React-based frontend components; Develop and extend Python backend services, including APIs, integrations, and data processing; Collaborate closely with product, QA, and engineering teams in overlapping EST hours; Participate in design discussions and contribute to scalable, maintainable solutions. Must haves Commercial experience with LLMs, preferably Claude , OpenAI APIs , similar APIs, or custom model integration; 1+ year of React experience with hooks, state management, and component-driven development; 1+ year of Python experience in API development and backend logic; Experience working in distributed teams with active collaboration; Upper-intermediate English level. Nice to haves Experience with FastAPI or similar frameworks; Exposure to AI evaluation, prompt testing, or AI quality considerations; Prior work on data-heavy or AI-driven products. The benefits of joining us 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 via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 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!
Technology
AgileEngine
Full Stack Engineer ID55426
Senior
Remote
Krakow, Poland
4,300 - 6,400 USD
🏢 Summary: Full Stack Engineer role focused on building and scaling real-time, data-driven microservices and responsive web applications. The position emphasizes backend development with Java and Spring Boot, API design, cloud deployment on AWS, and integration with a React/TypeScript frontend. You will own parts of the data layer and architecture while delivering secure, high-performance solutions with real-time capabilities. 🗂️ Requirements: 4+ years backend development experience with Java, Experience with Java 11+, Hands-on experience with Spring Boot, Experience building REST APIs with OpenAPI, Experience with WebSockets or real-time/streaming technologies, Strong knowledge of MySQL, schema design, indexing, query optimization, Experience with Flyway or Liquibase, Experience with Redis or message/event systems, Experience deploying services on AWS or other cloud provider, Ability to write automated unit and integration tests, Experience with CI/CD processes, Professional experience with React and TypeScript or strong JavaScript, Experience integrating REST APIs on frontend, Experience with Jest or other frontend testing frameworks, Upper-intermediate English level 📃 Skills: Java, Spring, SpringBoot, OpenAPI, REST, WebSockets, MySQL, Flyway, Liquibase, Redis, AWS, React, TypeScript, JavaScript, Jest, CI/CD, S3 🏢 Description: AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. 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 Full Stack Engineer , you will build and scale real-time, data-driven services that power federated search and seamless user experiences across complex systems. Working with Java, Spring Boot, React, TypeScript, and AWS, you’ll develop microservices, design APIs, and deliver responsive interfaces with live updates. This role offers strong ownership of the data layer and architecture, close collaboration with stakeholders, and the opportunity to innovate using modern cloud and real-time technologies. What you will do Work full-stack with a backend emphasis; Build and maintain a microservice for federated queries, query status tracking, results handling, and device/configuration management; Write interface agents to extract data from external interfaces; Implement and improve real-time features using Redis, AWS, and WebSockets; Own part of the data layer using MySQL, S3, and migration tools; Build secure and robust services ensuring reliability and quality; Contribute to a React and TypeScript client; Embed solutions across the existing product line; Build search forms and integrate APIs with real-time updates using WebSockets; Display query status, results, and history in a responsive UI; Collaborate with engineers and stakeholders on design and implementation; Translate user workflows into APIs and UI flows in collaboration with product teams; Participate in code reviews, design discussions, and continuous improvement of architecture and practices. Must haves 4+ years of backend development experience with Java (preferably Java 11+); Hands-on experience with Spring Boot and OpenAPI for building REST APIs; Experience with WebSockets or other real-time/streaming technologies; Solid understanding of relational databases such as MySQL , including schema design, indexing, and query optimization; Experience with database migration tools such as Flyway or Liquibase ; Practical experience with Redis or message/event systems; Experience deploying and operating services on AWS or another cloud provider; Ability to write automated backend tests (unit and integration); Familiarity with CI/CD processes; Hands-on experience with AI coding tools; Professional experience with React and TypeScript or strong JavaScript; Experience integrating REST APIs on the frontend and handling loading and error states; Familiarity with frontend testing frameworks such as Jest ; Upper-intermediate English level. Nice to haves Experience with React Query or similar server-state libraries; Experience with React Hook Form or other advanced form libraries; Experience with Redis pub/sub or Redis Streams in production; Experience with Infrastructure as Code such as Terraform ; Familiarity with AWS services such as Lambda, API Gateway, EventBridge, and S3; Experience in domains with data sensitivity, auditing, or role-based access requirements. The benefits of joining us 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 via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 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!
Technology
RemoDevs
Frontend React Developer
Mid
On-site
Warsaw, Poland
4,500 - 6,000 USD/mo
🏢 Summary: Mid Frontend React Developer role focused on building AI-powered enterprise web applications using React, Next.js, and TypeScript. The position involves developing scalable user interfaces, integrating backend APIs, and improving performance and usability in collaboration with cross-functional teams. The offer includes access to modern AI development tools, stock options, and work on production AI products used by enterprise customers. 🗂️ Requirements: 2–5 years of frontend development experience, React, JavaScript, TypeScript, Next.js or modern React framework, REST APIs, Asynchronous data fetching, Modern CSS solutions, Responsive design, Cross-browser compatibility, Reusable frontend code, Git, Modern development workflows, AI coding tools, English B2+ 📃 Skills: React, Next.js, TypeScript, JavaScript, REST, Tailwind, CSS, Git, Copilot, ChatGPT, Claude, SWR, ReactQuery, Node.js, Python, Playwright, Cypress, AWS, Highcharts 🏢 Description: About Us Many companies want to use AI agents, but these tools often struggle with real business tasks. We build a platform that helps AI understand company knowledge, workflows, and processes, enabling it to provide accurate and reliable answers. Our technology is trusted by large international companies and integrates with leading AI and cloud platforms. Our mission is to help people find better answers and make better decisions with AI. About the Role We are looking for a Mid Frontend React Developer to help build modern web applications that make enterprise AI intuitive and reliable. You'll work closely with experienced frontend engineers, designers, backend developers, and product managers to create fast, responsive, and scalable user experiences. You'll contribute to new features, improve existing functionality, and gain hands-on experience building AI-powered products used by enterprise customers. What You Will Do - Build and maintain modern web applications using React, Next.js, and TypeScript. - Develop user interfaces for AI-powered features such as chat, search, and knowledge management. - Create reusable UI components and contribute to our design system. - Integrate frontend applications with backend APIs and real-time data. - Improve application performance, responsiveness, and user experience. - Write clean, maintainable, and well-tested code. - Participate in code reviews and collaborate with engineers, designers, and product managers. - Use AI development tools to improve productivity and software quality. - Learn from production feedback and continuously improve existing features. Requirements - 2–5 years of experience building modern frontend applications. - Good knowledge of React, JavaScript, and TypeScript. - Experience with Next.js or another modern React framework. - Experience working with REST APIs and asynchronous data fetching. - Familiarity with modern CSS solutions such as Tailwind CSS, CSS Modules, or CSS-in-JS. - Understanding of responsive design and cross-browser compatibility. - Experience writing maintainable, reusable frontend code. - Familiarity with Git and modern development workflows. - Experience using AI coding tools such as GitHub Copilot, Claude Code, ChatGPT, or similar. - English at B2 level or higher. Nice to Have - Experience with React Flow, Highcharts, or similar visualization libraries. - Familiarity with SWR, React Query, or similar data-fetching libraries. - Basic knowledge of Node.js or Python. - Experience working with AI-powered applications, chat interfaces, or search experiences. - Familiarity with Playwright, Cypress, or other frontend testing frameworks. - Basic understanding of accessibility and Core Web Vitals. - Experience with AWS or other cloud platforms. What We Offer - 18,000–23,000 PLN B2B (depending on experience). - Company stock options. - MacBook Pro. - Modern technology stack. - Opportunity to contribute to open-source projects. - Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, v0, MCP Servers, and credits for testing new AI technologies. - The opportunity to work on production AI products used by enterprise customers. - A collaborative engineering culture focused on learning, mentorship, and continuous improvement. Our Values - Quality - We build software with care and attention to detail. - Momentum - We move quickly, learn continuously, and improve through iteration. - Accountability - We take ownership of our work and communicate openly. - Hard Work - We solve challenging problems together and support one another. - Learning - We stay curious, embrace feedback, and continuously grow. - Adaptability - We welcome change and see new challenges as opportunities. - Teamwork - We collaborate, share knowledge, and celebrate success together.