Fullstack Engineer (React, Python)

🏢 Summary: Frontend Engineer role focused on building enterprise AI applications using Next.js, React, and TypeScript in a fully on-site Warsaw office environment. The position involves developing real-time AI interfaces, managing complex frontend state, improving performance and accessibility, and contributing to technical decisions. Candidates will work with modern AI development tools and enterprise-scale frontend systems. 🗂️ Requirements: 3–5 years of frontend engineering experience, Strong knowledge of React, Strong knowledge of TypeScript, Strong knowledge of Next.js, Experience building production Next.js applications, Understanding of SSR, SSG, and CSR, Experience with complex state management, Experience with real-time updates and optimistic UI, Experience building AI or LLM-based interfaces, Understanding of frontend performance and Core Web Vitals, Knowledge of accessibility and localization, Security-focused development approach, Experience using AI coding assistants, Good communication skills, Ability to work fully on-site in Warsaw 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, AI, LLM, CoreWebVitals, Localization, Accessibility, Security, GitHubCopilot, OpenAI, Claude, ReactFlow, Highcharts, RAG, MCP, DSPy, Node.js, Python 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a frontend engineer with several years of experience who wants to build user interfaces for enterprise AI products. You will help create applications that allow users to work with AI systems in a simple and reliable way. You will build production applications using Next.js, work with complex application state, real-time AI features, and modern frontend technologies. Over time, you will also take part in important technical decisions. The position is based in Warsaw and requires working from the office. Responsibilities Build and deliver production Next.js applications with complex state management and real-time AI features. Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. Help improve our component library and design system to keep the UI consistent, reusable, and accessible. Develop enterprise features such as localization, accessibility, browser compatibility, and security. Monitor applications after release, improve performance, reduce bundle size, and track Core Web Vitals. Use AI tools every day to improve development speed and internal frontend workflows. Maintain high code quality through testing and code reviews. Requirements Around 3–5 years of experience as a frontend engineer. Strong knowledge of React, TypeScript, and Next.js. Experience building production Next.js applications and understanding the differences between SSR, SSG, and CSR. Good experience with state management, including real-time updates, optimistic UI, and multi-tenant applications. Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. Good understanding of frontend performance, Core Web Vitals, and user experience. A security-focused approach and knowledge of accessibility and localization. Experience using AI coding assistants as part of your daily development work. Good communication skills and the ability to explain technical decisions clearly. Nice to have Experience with React Flow, Highcharts, or other data visualization libraries. Experience building vector search, RAG, or semantic search interfaces. Knowledge of MCP, DSPy, or other modern AI frameworks. Basic understanding of Node.js or Python backend development. Contributions to design systems or open-source UI libraries. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team has strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.

🏢 Summary: Backend Engineer role focused on building production systems for AI agents, including backend services, APIs, and data pipelines for enterprise customers. The position involves designing reliable distributed systems, maintaining production services, and collaborating closely with cross-functional teams in a fully on-site Warsaw office environment. The company offers a modern AI-focused tech stack, B2B contract, stock options, and opportunities to contribute to open-source projects. 🗂️ Requirements: 3–5 years of experience building backend production systems, Strong Python skills, Understanding of distributed systems, Experience with AWS, GCP, or Azure, Knowledge of SQL and NoSQL databases, Database design experience, Security-focused approach to system design, Ability to manage projects from idea to production, Strong written and spoken communication skills, Experience using AI tools in software development, Ability to work fully on-site in Warsaw 📃 Skills: Python, AWS, GCP, Azure, SQL, NoSQL, AI, TypeScript, APIs, GitHub, Copilot, Codex, Claude 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and handles real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a backend engineer with several years of experience who wants to take responsibility for real systems, not only complete assigned tasks. You will solve backend challenges, choose the best technical solutions, deliver new features, and support them in production. We are looking for someone with good technical skills, clear communication, and a desire to build systems that are simple, reliable, and easy to improve. You will help build production systems for AI agents, working on real problems for customers who already use our platform. The position is based in Warsaw and requires working from the office. Responsibilities Build backend services, APIs, data pipelines, and background processes for production systems. Turn business requirements into technical solutions and implementation plans. Monitor and maintain services after release, improving reliability, performance, and system monitoring. Design service interfaces and data models that fit well into the overall system. Create technical documentation and diagrams when they help the team. Work closely with product managers, frontend engineers, and platform engineers. Improve engineering processes using AI tools, automation, and better workflows. Help maintain high code quality through code reviews and design reviews. Requirements Around 3–5 years of experience building backend production systems. Strong Python skills and the ability to write clean and maintainable code. Good understanding of distributed systems, including concurrency, failures, data consistency, asynchronous processing, and service communication. Experience with cloud platforms such as AWS, GCP, or Azure, and knowledge of SQL, NoSQL, and database design. A security-focused approach when working with sensitive data and system design. Ability to manage projects from idea to production with increasing responsibility. Good written and spoken communication skills, with the ability to explain technical decisions clearly. Experience using AI tools as part of your daily software development work. Nice to have Experience with AI agents, orchestration, retrieval systems, tool calling, or LLM-based infrastructure. Knowledge of TypeScript or willingness to work across the full technology stack. Experience taking on more responsibility and learning quickly. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team combines strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.

🏢 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.

🏢 Summary: Long-term remote B2B opportunity for an experienced Fullstack Software Developer to build scalable React/Next.js and Python (FastAPI) applications enhanced with AI/LLM integrations. The role focuses on modern frontend architecture, async backend services, real-time systems, and production-grade AI workflows. You will design end-to-end architectures and deliver secure, high-performance solutions in a distributed engineering team. 🗂️ Requirements: 5+ years experience as Fullstack or Software Engineer, Strong React and Next.js experience in production, Strong TypeScript proficiency, Strong Python experience with async programming, Experience with FastAPI, Experience designing scalable distributed systems and APIs, Knowledge of frontend architecture, state management, performance optimization, Experience with automated testing frameworks, Experience with REST, GraphQL, WebSockets, Hands-on experience integrating AI/LLM services (OpenAI, Azure AI or similar), Experience with LangChain or similar agent frameworks, Strong system design and software architecture knowledge, Experience working in Agile environments, Fluency in English, EU citizenship and residence in Poland 📃 Skills: React, Next.js, TypeScript, Python, FastAPI, Tailwind, Playwright, Vitest, React, Testing, Library, pytest, REST, GraphQL, WebSockets, OpenAI, Azure, LangChain, AI, LLM 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking an experienced Software Developer (React + Python + AI) to join an innovative engineering remote team working on modern full-stack applications enhanced with AI capabilities. In this role, you will contribute to designing scalable systems, building high-performance web applications, and integrating advanced AI/LLM solutions into production environments. Project information: Type of project: IT services Office location: Wrocław, Poland Work mode: Remote from Poland Budget: 130-160 PLN net/ h- b2b Project length: Long-term Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate’s availability) Project scope: Design and develop modern web applications using React / Next.js and TypeScript Build reusable, scalable, and accessible UI components using Tailwind and modern design systems Drive frontend architecture decisions including state management, modularization, and performance optimization Ensure high-quality frontend delivery with strong test coverage (Playwright, Vitest, React Testing Library) Design and develop backend services using Python (async) and FastAPI Build scalable REST and event-driven APIs as well as real-time systems Implement WebSockets or similar technologies for real-time communication Develop unit, integration, and end-to-end testing strategies for backend systems Design and implement end-to-end system architecture in collaboration with cross-functional teams Integrate services using REST APIs, GraphQL, and WebSockets Participate in performance tuning, scalability improvements, and system optimization Integrate AI/LLM-based solutions using OpenAI / Azure AI services Develop AI workflows using frameworks such as LangChain or similar agent-based tools Apply prompt engineering techniques and optimize model interactions for production use cases Orchestrate multiple AI models and services to deliver real-world intelligent features Apply security and privacy best practices across the full stack Ensure adherence to secure coding standards and maintain high code quality through code reviews and automated testing Collaborate closely with engineering teams to ensure consistency, reliability, and scalability of solutions Competence demands: Minimum 5+ years of experience as a Fullstack or Software Engineer Strong experience with React / Next.js and TypeScript in production-grade applications Strong proficiency in Python (async programming) and FastAPI Experience designing scalable distributed systems and APIs Solid understanding of frontend architecture, performance optimization, and state management Experience with testing frameworks (Playwright, Vitest, React Testing Library, pytest or similar) Familiarity with REST, GraphQL, and WebSockets Hands-on experience integrating AI/LLM services (OpenAI, Azure AI, or similar) Knowledge of agent frameworks such as LangChain or similar tools Strong understanding of system design principles and software architecture Experience working in Agile environments and cross-functional teams Strong communication skills and ability to work in a distributed team Fluency in English (written and spoken) We offer: Remote working model Dynamic and innovation-driven engineering environment Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) Multisport card (also for an accompanying person) Life insurance Recruitment process: Introductory call Technical interview Final decision

🏢 Summary: Opportunity to build an AI-native platform for the legal industry, creating agentic AI workflows that automate complex, multi-step document processes such as review, drafting, and analysis. The role focuses on developing scalable, high-performance backend systems and collaborating closely with product to shape direction and deliver impactful solutions. Ideal for top-tier engineers who write high-quality code and actively contribute to technical decisions in a fast-paced startup environment. 🗂️ Requirements: Strong English communication (C1+), Experience building scalable and robust backend systems, Hands-on experience with AI tooling in daily work (e.g., Claude Code, Cursor), Ability to work within Python-based backend stack, Comfort working in fast-paced international startup environment 📃 Skills: Python, FastAPI, Redis, SQL, NoSQL, Celery, Azure, React, Next.js, TypeScript, Zustand, shadcn/ui, LLM, OpenAI, Anthropic, LangChain 🏢 Description: About us comm1t is a specialist IT recruitment agency delivering top engineers across Poland and Europe 🇪🇺. We combine experienced recruiters with autonomous AI agents and an obsessive focus on quality — sourcing 24/7 across LinkedIn, GitHub, and beyond to reach engineers who aren't actively job hunting but are open to the right move. We don't flood you with CVs. We get to know each candidate's skills, values, and goals, then send only the best-matched people — and we stay close through onboarding and the first months to make sure the placement lasts. About the role You'll work on an AI-native platform for the legal industry — building agentic AI workflows that let legal teams delegate complex, multi-step work. Not just chat-based assistance, but actual end-to-end execution on documents: review, drafting, analysis, anonymization, translation, and semantic search. The product is highly scalable and performant, handling large volumes of large legal documents. You'll work very closely with the product, with real ownership and impact on its direction. We're looking for top-tier engineers who deliver high-quality code and challenge decisions rather than just execute tickets. Tech stack Python, FastAPI, Redis, SQL, NoSQL, Celery, Azure Cloud, React, Next.js, TypeScript, shadcn/ui, Zustand Must-have Strong English communication (C1+) Experience building scalable, robust backend systems within (or close to) the stack above Hands-on experience with AI tooling in your daily work (Claude Code, Cursor, etc.) — this is a hard requirement Comfort in a fast-paced, international startup environment Nice to have Experience building LLM-powered features or workflows (OpenAI/Anthropic APIs, LangChain, agentic systems)

🏢 Summary: Backend engineering role focused on building scalable Python services and APIs for an AI platform used by enterprise customers. The position involves developing production backend systems, integrating AI components, and improving reliability in a collaborative engineering environment. Offers modern AI tooling, cloud-native development exposure, and growth opportunities within an AI-focused product team. 🗂️ Requirements: 2–5 years of backend application development experience, Python, REST APIs, Backend services, SQL, PostgreSQL, Asynchronous programming, Background job processing, AWS, Azure, GCP, Testing, Version control, AI development tools, English B2 📃 Skills: Python, FastAPI, Django, PostgreSQL, SQL, AWS, Azure, GCP, Docker, Redis, RabbitMQ, Kafka, TypeScript, REST, Git, CI/CD, ChatGPT, Copilot, Codex, Claude 🏢 Description: About Us Many companies want to use AI agents, but these agents often struggle with real business tasks. We solve this problem by building a platform that helps AI understand business rules, workflows, and processes. This enables AI to make better decisions and provide accurate, reliable, and trustworthy results. Our technology is used by leading companies across multiple industries to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that previously took hours in just seconds. We work with leading technology partners and have been recognized for our innovative approach. Our mission is to help people everywhere get better answers through AI. About the Role We are looking for a Mid Backend Engineer to help build scalable backend services that power our AI platform. You'll work closely with experienced backend engineers, frontend developers, product managers, and platform engineers to develop new features, improve existing systems, and deliver reliable production software. This is a great opportunity to work on modern AI infrastructure while growing your technical skills in a collaborative engineering environment. Responsibilities - Build and maintain backend services, APIs, and background processing systems. - Develop scalable application logic using Python. - Collaborate with product managers and engineers to deliver new product features. - Integrate backend services with databases, external APIs, and AI components. - Monitor, troubleshoot, and improve production services. - Write clean, maintainable, and well-tested code. - Participate in code reviews and engineering discussions. - Improve development workflows using AI tools and automation. - Continuously learn from production feedback and contribute to improving system reliability and performance. Requirements - 2–5 years of experience building production backend applications. - Good knowledge of Python. - Experience building REST APIs and backend services. - Understanding of relational databases (PostgreSQL or similar) and SQL. - Familiarity with asynchronous programming and background job processing. - Basic understanding of cloud platforms such as AWS, Azure, or GCP. - Understanding of software engineering best practices, testing, and version control. - Good communication skills and willingness to collaborate across engineering and product teams. - Experience using AI development tools such as GitHub Copilot, Claude Code, ChatGPT, or similar. - English at B2 level or higher. Nice to Have - Experience with FastAPI, Django, or similar Python frameworks. - Experience working with Docker and CI/CD pipelines. - Familiarity with Redis, RabbitMQ, Kafka, or similar messaging technologies. - Experience building AI-powered applications or integrating LLM APIs. - Basic knowledge of TypeScript or frontend development. - Interest in distributed systems and cloud-native architectures. What We Offer - 20,000–24,000 PLN B2B (depending on experience). - Company stock options. - MacBook Pro. - Modern technology stack with opportunities to contribute to open-source projects. - Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP Servers. - The opportunity to work on production AI systems used by enterprise customers. - A collaborative engineering culture focused on learning, ownership, and continuous improvement. - Career growth alongside experienced engineers in a fast-growing AI company. Our Culture and Values - Quality - We build reliable software with attention to detail and long-term maintainability. - Momentum - We move quickly, learn continuously, and improve through iteration. - Accountability - We take responsibility for our work and communicate openly. - Hard Work - We solve ambitious problems together and support each other along the way. - Learning Agility - We stay curious, embrace feedback, and continuously develop our skills. - Adapt and Thrive - We welcome change and see challenges as opportunities to improve. - Win Together - We collaborate, share knowledge, and succeed as one team.

🏢 Summary: Fullstack (or backend-leaning) engineer role focused on building scalable, secure AI-driven workflows for legal teams to execute complex document processes end-to-end. The position involves developing agentic AI systems with full ownership over features, ensuring traceability, explainability, and high performance in regulated environments. You will work with a modern Python and React-based stack and directly influence product direction in a fast-paced startup setting. 🗂️ Requirements: 5–6+ years of experience with Python, 3+ years of experience with FastAPI, Experience building scalable, robust backend systems, Hands-on experience with AI tooling (e.g., Claude Code, Cursor), Ability to build end-to-end features (fullstack or strong backend), Comfort working in a fast-paced, international startup environment 📃 Skills: Python, FastAPI, Redis, SQL, NoSQL, Celery, Azure, React, Next.js, TypeScript, Zustand, shadcn/ui, OpenAI, Anthropic, LangChain 🏢 Description: About us comm1t is a specialist IT recruitment agency delivering top engineers across Poland and Europe 🇪🇺. We combine experienced recruiters with autonomous AI agents and an obsessive focus on quality — sourcing 24/7 across LinkedIn, GitHub, and beyond to reach engineers who aren't actively job hunting but are open to the right move. We don't flood you with CVs. We get to know each candidate's skills, values, and goals, then send only the best-matched people — and we stay close through onboarding and the first months to make sure the placement lasts. About the role We're looking for fullstack engineers (preferably) — but if you're strong on the backend and don't feel at home on the frontend, that's completely fine too. What matters most is that you can own features end-to-end. You'll build agentic AI workflows that let legal teams delegate complex, multi-step work — not just chat-based assistance, but real end-to-end execution on documents: review, drafting, analysis, anonymization, translation, and semantic search. Every step the platform takes has to be traceable, explainable, and secure, since we operate in regulated environments with sensitive client data. The product handles large volumes of large legal documents, so scalability and performance are core, not afterthoughts. You'll work very closely with the product itself, with real ownership and impact on its direction. We're looking for top-tier engineers who ship high-quality code and challenge decisions rather than just close tickets. Tech stack Backend: Python, FastAPI, Redis, SQL, NoSQL, Celery, Azure Cloud Frontend: React, Next.js, TypeScript, shadcn/ui, Zustand Must-have Minimum 5-6 years of experience with Python and 3+ with FastApi Experience building scalable, robust backend systems within (or close to) the stack above Hands-on experience with AI tooling in your daily work (Claude Code, Cursor, etc.) — this is a hard requirement Comfort in a fast-paced, international startup environment Nice to have Experience building LLM-powered features or workflows (OpenAI/Anthropic APIs, LangChain, agentic systems)

🏢 Summary: Senior Frontend Engineer role focused on building enterprise-grade AI-powered Next.js applications with complex state management, real-time features, and scalable frontend architecture. The position involves creating advanced AI interfaces, improving performance and accessibility, and contributing to design systems in a fully on-site Warsaw office environment. Candidates will work with modern AI development tools and enterprise-scale frontend technologies. 🗂️ Requirements: 5+ years of frontend development experience, 3+ years of React experience, Strong TypeScript skills, Production experience with Next.js, Knowledge of App Router, Knowledge of Server Components, Understanding of SSR, Understanding of SSG, Understanding of CSR, Experience with complex state management, Experience with real-time updates, Experience with optimistic UI, Experience with multi-tenant systems, Experience building AI or LLM interfaces, Knowledge of frontend performance optimization, Experience improving Core Web Vitals, Understanding of accessibility standards, Understanding of localization, Understanding of frontend security, Experience handling sensitive data, Experience using AI coding assistants, Strong communication skills, Ability to work fully on-site in Warsaw 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, AI, LLM, CoreWebVitals, Accessibility, Localization, Security, ReactFlow, Highcharts, Node.js, Python, RAG, OpenAI, Codex, GitHub, Copilot 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a Senior Frontend Engineer who enjoys building high-quality user interfaces for enterprise AI products. In this role, you will design and build important frontend features, solve complex UI problems, and improve the user experience over time. You will take ownership of frontend architecture and help build production Next.js applications with complex state management, real-time AI features, and enterprise functionality. The position is based in Warsaw and requires working from the office. Responsibilities Design and build production Next.js applications that support complex state, high traffic, and real-time AI features. Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. Build and improve our component library and design system to keep the user experience consistent, accessible, and reusable. Deliver enterprise features such as localization, accessibility, browser compatibility, and security. Monitor applications after release, improve performance, reduce bundle size, track Core Web Vitals, and help systems scale. Maintain high engineering standards through code reviews, testing, and mentoring other developers. Requirements More than 5 years of frontend development experience, including at least 3 years working with React and modern TypeScript. Strong experience building production applications with Next.js, including App Router, Server Components, and understanding SSR, SSG, and CSR. Experience managing complex application state, including real-time updates, optimistic UI, multi-tenant systems, and large amounts of data. Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. Strong knowledge of frontend performance and experience improving Core Web Vitals in large applications. Good understanding of accessibility, localization, security, and enterprise application standards. A security-focused approach and experience working with sensitive data. Strong product thinking and the ability to improve user experience without waiting for detailed designs. Experience using AI coding assistants as part of your daily development work. Good written and spoken communication skills and the ability to explain technical decisions clearly. Nice to have Experience with React Flow, Highcharts, or other data visualization libraries. Experience building vector search, RAG, generative AI, or semantic search interfaces. Basic knowledge of Node.js or Python to understand backend code and APIs. Experience contributing to design systems or open-source UI libraries. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team has strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.

🏢 Summary: Senior Python Engineer role focused on designing and developing GenAI applications, including architecture, backend services, and AI integrations. The position involves building and maintaining APIs and microservices, integrating GenAI models (e.g., RAG, agentic workflows), and ensuring high-quality, well-tested solutions in cloud environments. The role requires close collaboration across the full project lifecycle while driving technical excellence in AI-powered systems. 🗂️ Requirements: 6+ years of experience in Python development, Fluency in Python ecosystem, Experience with FastAPI or Flask, Experience with SQL and NoSQL databases, Knowledge of clean code and design patterns in Python, Experience writing unit tests, Experience integrating GenAI models into business applications, Knowledge of RAG and agentic workflows, Experience building APIs and microservices, Familiarity with AWS, GCP, or Azure, Familiarity with Continuous Deployment, English C1, Polish C1 📃 Skills: Python, FastAPI, Flask, SQL, NoSQL, GenAI, RAG, APIs, Microservices, AWS, GCP, Azure, CI/CD, UnitTesting 🏢 Description: 🚀 You will be responsible for: Design architecture of GenAI applications, Design, develop, and maintain Python code in AI applications and components, Code review and identification of areas of improvments, Collaborate with data scientists and machine learning engineers to utilize AI models in the applications, Knowledge of basic types of solutions using GenAI models (RAGs, agentic workflows, etc.) Collaborate with other roles (managers, testers, DevOps, etc.) through the whole life cycle of a project, Develop and maintain APIs and microservices for AI integration with other systems, Conduct experiments and evaluations to measure the performance of GenAI models, Stay up-to-date with the latest advancements in GenAI technologies, Contribute to a collaborative and innovative team culture. Additional advantages, but not required directly for the position: Knowledge of another object-oriented programming language (Java/C#/C++) Knowledge of Machine Learning algorithms and libraries (scikit-learn, PyTorch) 👉 What you will need: At least 6 years of experience and fluency in Python development ecosystem, Experience in building back-end services in Python with frameworks like FastAPI (or Flask ), SQL and NoSQL databases , Knowledge of clean code and design patterns in Python , strong attitude to build well structured, high quality solutions, Experience in writing robust unit tests for developed applications, Experience in using GenAI models in building business applications, Familiarity with cloud platforms (AWS, GCP, Azure) and cloud-native technologies, Familiarity with Continuous Deployment lifecycle, Excellent problem-solving and analytical skills, Ability to work independently and as part of a team, Very good knowledge of English (C1) and Polish (C1) Strong communication and documentation skills 👉 What we offer: The opportunity to work on cutting-edge projects in the dynamic field of cloud and data technologies. A supportive and collaborative work environment that fosters professional growth . Competitive remuneration and various bonuses, such as access to private medical care ( Medicover or Luxmed ) and sport ( Multisport ) cards, reimbursement for English classes , access to the Employee Capital Plan ( PPK ) and b udget for professional development. We mostly work remotely , but we ask that you be willing to come to the office occasionally for workshops, client meetings or project-related discussions. Non-work-related activities galore! We have a running team (with a pro coach), internal competitions, from cookery to photography, a ping-pong league, team building, well-being expert seminars. You can suggest beneficiaries for our CF4GOOD charity program . Company culture rooted in respect and cooperation, not competition . You'll be working with great people, open to new challenges and directions. If you are tired of the proverbial corporate treadmill, come to us to rest mentally. If you've had luck with employers, we'll do our best not to buck the trend.

🏢 Summary: Mid Full Stack Engineer role focused on building and improving AI-powered enterprise products across frontend and backend systems. The position involves developing web applications, APIs, and production features using modern technologies while collaborating closely with cross-functional teams. Candidates will work with AI development tools and contribute to scalable, high-quality software in a fast-growing environment. 🗂️ Requirements: 2–5 years of experience building production web applications, Knowledge of React, Knowledge of TypeScript or another modern frontend framework, Experience building backend services, Experience building REST APIs, Familiarity with testing and version control, Understanding of web application architecture, Understanding of client-server communication, Problem-solving skills, Attention to code quality, Strong communication skills, Experience using AI development tools, Willingness to collaborate across engineering, product, and design teams 📃 Skills: React, TypeScript, REST, Git, GitHub, Copilot, Claude, ChatGPT, Python, Node.js, AWS, GCP, Azure, Docker, CI/CD 🏢 Description: About Us Many companies want to use AI agents, but these agents often struggle with complex business tasks. We solve this problem by building a platform that understands company knowledge, policies, processes, and workflows, enabling AI to make reliable decisions instead of simply generating answers. Our technology helps businesses automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that previously took hours in just a few seconds. Our mission is simple: to give people better answers everywhere. About the Role We are looking for a Mid Full Stack Engineer who enjoys building products and solving real user problems. In this role, you'll work across both the frontend and backend, collaborating closely with engineers, product managers, and designers to deliver new features and improve existing ones. You'll have the opportunity to work with modern AI technologies, contribute to production systems, and grow your technical skills in a fast-moving environment. If you enjoy learning, shipping high-quality software, and working on products used by enterprise customers, we'd love to hear from you. Responsibilities - Build and maintain product features across both frontend and backend. - Develop user interfaces using modern frontend technologies. - Build and extend backend APIs and business logic. - Collaborate with engineers, product managers, and designers to implement new functionality. - Improve application performance, reliability, and usability. - Write clean, maintainable, and well-tested code. - Participate in code reviews and engineering discussions. - Help monitor production systems and improve features based on user feedback and product data. - Use AI development tools to improve productivity and software development workflows. Requirements - 2–5 years of experience building production web applications. - Good knowledge of React, TypeScript, or another modern frontend framework. - Experience building backend services and REST APIs. - Familiarity with modern software engineering practices, testing, and version control. - Understanding of web application architecture and client-server communication. - Good problem-solving skills and attention to code quality. - Strong communication skills and willingness to collaborate across engineering, product, and design teams. - Experience using AI tools such as GitHub Copilot, Claude Code, ChatGPT, or similar in day-to-day development. - Curiosity, ownership of your work, and a desire to continuously learn. Nice to Have - Experience with Python, Node.js, or both. - Experience working on AI-powered products or LLM integrations. - Familiarity with cloud platforms (AWS, GCP, or Azure). - Knowledge of Docker, CI/CD, or modern deployment workflows. - Understanding of performance optimization and accessibility best practices. What We Offer - B2B contract. - Company stock options. - MacBook Pro for work. - Modern technology stack with opportunities to contribute to open-source projects. - Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP Servers. - The opportunity to work on real AI products used by enterprise customers. - A collaborative engineering culture focused on learning, ownership, and continuous improvement. - The chance to grow your career alongside experienced engineers in a fast-growing AI company. Why Join Us Our leadership team brings deep experience in AI and knowledge management. We've raised over $60 million in funding and achieved three consecutive years of 3× growth. We believe great products are built by great teams, and our culture is shaped by these values: - Quality - We care about craftsmanship and building software that lasts. - Momentum - We move quickly, iterate often, and continuously improve. - Accountability - We take responsibility for our work, communicate openly, and support one another. - Hard Work - We believe ambitious goals require dedication and teamwork. - Learning Agility - We stay curious, embrace feedback, and continuously develop our skills. - Adapt and Thrive - We welcome change and see challenges as opportunities to improve. - Win Together - We succeed by collaborating, sharing knowledge, and helping each other grow.