Senior Full Stack & AI Developer

🏢 Summary: B2B opportunity for an AI Technical Lead to design and deliver production-ready AI solutions, combining modern web technologies with advanced AI architectures such as RAG and multi-agent systems. The role involves leading AI projects end-to-end, defining system architecture, and guiding teams in building scalable, high-quality AI-driven products. Monthly compensation ranges from 20,000 to 25,000 with paid days off. 🗂️ Requirements: 5+ years commercial software development experience, Minimum 2 years experience with AI projects in production, Strong experience with TypeScript, Strong experience with Node.js, Strong experience with React, Strong experience with Next.js, Experience leading AI projects end-to-end, Knowledge of RAG architecture, Experience with vector databases, Experience with LLM integrations, Experience with multi-agent frameworks, Experience with workflow orchestration, Experience with validation and observability, Knowledge of AI models and providers, Experience with API management and cost optimisation, Proficiency in Python, Experience with PyTorch, TensorFlow or scikit-learn, Ability to define system architecture, Fluent English (B2+), Fluent Polish (B2+) 📃 Skills: TypeScript, Node.js, React, Next.js, Python, PyTorch, TensorFlow, scikit-learn, RAG, LLM, Pinecone, Chroma, MongoDB, Postgres, Multi-agent, Orchestration, Validation, Observability, API, ReactNative, Meteor, GraphQL, Apollo 🏢 Description: About us At Vazco, we don’t just follow technology trends – we redefine what’s possible with AI. Every project we take on is a chance to build meaningful digital experiences powered by smart, scalable AI solutions. Whether we’re automating complex processes, enhancing user journeys, or enabling data-driven decisions — we’re here to make innovation real. Excited about solving tough challenges for startups, scale-ups, and enterprises around the world? Curious about how AI can drive real business value, not just hype? That’s the space we operate in. You won’t have to choose between commercial impact and meaningful tech — our portfolio includes Open Source projects, nonprofit work, and deep partnerships with forward-thinking companies. Apart from that, you will find yourself in an authentic and open company culture. Our non-hierarchical structure means minimal management and transparent communication with everyone (including the CEO). Now, let’s see what else makes joining our Crew so exciting! ⛵ About your project/work As an AI Technical Lead at Vazco, you’ll work with a team building real, production-ready agentic AI systems and LLM-powered applications. You’ll keep growing your skills in areas like multi-agent architectures, orchestration, evaluation, and modern AI engineering practices. You’ll work closely with AI Engineers, AI-UX Designers, QA Specialists, and Product Managers who care about doing solid technical work and shipping things that actually matter . On top of that, you’ll have a real impact on how the company works, how we shape our methodology and offer, and you’ll get to meet and collaborate with interesting people from the industry. You meet all our criteria if you have: 5+ years of commercial experience, including at least 2 years on AI-based projects in production. Strong background in TypeScript , Node.js , React , and Next.js . Proven experience leading AI projects end to end, from scoping and estimation to production rollout. Solid understanding of RAG architecture, vector databases, and LLM integrations. Experience with multi-agent frameworks , workflow orchestration, validation, and observability . Familiarity with textbots, voicebots, image/video generation, avatars, and automation systems. Strong knowledge of AI models and providers, including cost optimisation and API management. Good command of Python and libraries such as PyTorch, TensorFlow, or scikit-learn. Strong client communication skills , with the ability to define architecture and guide the team. Fluent written and spoken English and Polish , at least B2 level. Strong understanding of prompt engineering, tool usage, reasoning control, context management, and hallucination mitigation . Experience with advanced LLM patterns, including function/tool calling, structured outputs, MCP workflows, and agentic orchestration . Understanding of AI evaluation methods and prompt optimisation workflows. Nice-to-haves We would be absolutely astonished* if you had: (* don't worry, it's okay to learn these skills later) Experience with React Native, Meteor, GraphQL, Apollo . Background in startup or agency environments. Experience with AI security, red teaming, or open-source contributions. Involvement in tech communities. Your responsibilities will include Designing, leading, and implementing production-ready, AI-driven solutions, including multi-agent architectures and RAG-based systems. Conducting technical discovery and estimation sessions with clients — translating requirements into architecture and implementation plans. Advising product and tech teams on AI strategy, tool selection, and long-term scalability. Ensuring technical excellence, code quality, and mentoring team members. Supporting the adoption of AI-UX and agentic design principles across products. Monitoring the performance and resilience of deployed systems to maintain quality over time. What success looks like after 6 months Led 1-2 agentic projects end to end, from discovery through production launch. Established strong architecture standards for RAG and agentic systems. Mentored 3-5 engineers and helped raise the team’s technical bar. Improved production systems by reducing hallucinations, latency, and infrastructure costs. Perks & Benefits Team-building & Company Events - After a day of focused work, there's nothing better than having a much-deserved mental break from responsibilities. Even better when it involves your pals! Be it a go-kart race with your team, a chill session of board games , or a couple of days in Prague - we do whatever fits our fancy. 🕺 Flexible working hours - Flexible working hours are not about being able to start your work within a specific timeframe. It's about maintaining the work-life balance you deserve . We have no strict "office hours" and embrace your early bird or night owl lifestyle. When you need to take a pause or manage your affairs, it's fine by us. 📲 Training budget - Whether it comes to AWS, Domain-Driven Development, Public Speaking training, and many more, we can match you with the best tutors 🧑‍🎓. Show us the direction you'd like to grow in, and we'll go above and beyond to meet your expectations. Personal branding - Build your true Pro status through blogging & social media activity as a company ambassador, your speeches at various conferences and meetups , hosting workshops , and participating in other exciting initiatives. Do it all with our backup. 🤝

🏢 Summary: Role combining product management, business analysis, and delivery coordination for software projects, with ownership of product vision, client collaboration, and Agile processes across the full development lifecycle. Focused on translating business goals into actionable plans and driving AI-driven product initiatives. 🗂️ Requirements: Minimum 3 years of experience in IT in Project Management, Product Owner, Product Manager, or Business Analyst role, Hands-on experience delivering software solutions from design to delivery, Experience across product development lifecycle with coordination or leadership responsibilities, Practical knowledge of Agile software development, Experience facilitating workshops such as Design Sprint or Discovery, Ability to work with data and metrics for decision-making, Experience adapting project workflows to changing tools and team dynamics, Fluent English (B2 or higher), Experience using AI tools in daily work 📃 Skills: Agile, Scrum, Jira, ChatGPT, Claude, Perplexity, NotebookLM, AI, KPIs, ROI 🏢 Description: Join Our Journey at Vazco! ⛵ At Vazco, we build products that deliver real value - not just software. We combine product thinking with technology to create scalable, AI-driven solutions for startups, scale-ups, and enterprises. We stay close to both business goals and user needs, working across the full product lifecycle - from discovery to delivery. Our non-hierarchical culture means open communication, real ownership, and space to influence how we work. Now, let’s see what else makes joining our Crew so exciting! ⛵ About your future role As a Product & Delivery Specialist, you’ll work at the intersection of product, delivery, and client collaboration. This is a role for someone who wants to shape decisions - not just coordinate execution. You’ll be supported by an experienced PM team, while gradually taking ownership of your own areas. Depending on the project, you’ll move between Business Analysis, Product Management, and Scrum facilitation. Working across different projects, you’ll gain exposure to diverse challenges, take end-to-end ownership, and continuously grow - both in delivery and product thinking. Your responsibilities Support clients in defining the product vision and strategy, and ensure it's clearly communicated within the team. Help translate business goals into actionable plans and measurable KPIs. Work with project budgets and support efficient resource management. Facilitate workshops and discovery sessions, driving alignment on product direction between the team and client. Define stakeholder needs and manage expectations in line with the product strategy. Conduct market and competitive analysis to inform product decisions. Collaborate with the team to assign tasks and resolve challenges effectively. Work with subcontractors and partners to ensure high-quality delivery. Develop your understanding of ROI and learn to communicate the business value of delivered work to clients. Are we a match? At least 3 years of experience in IT as a project management or related role (e.g. Product Owner, Product Manager, Business Analyst). Hands-on experience working on software solutions - from design through delivery. Exposure to different stages of the product development lifecycle, with some experience in coordinating or leading parts of it. Experience in reviewing and adapting project workflows in response to changing tools, team dynamics, or delivery challenges Experience in reviewing and adapting project workflows in response to changing tools, team dynamics, or delivery challenges A solid understanding of Agile software development (both theory and practice). Experience contributing to or facilitating workshops such as Design Sprint or Discovery phases. Ability to work with data and metrics to support decision-making, and understanding of how to communicate business value to stakeholders. Strong interpersonal and communication skills. Fluent English (B2 or higher) - you'll collaborate daily with clients from all over the world. Strong self-organization and accountability - you take ownership of your actions and outcomes. Confidence in expressing opinions and negotiation skills. Experience using AI tools (e.g. ChatGPT, Claude, Perplexity, NotebookLM) in day-to-day work, and a strong willingness to work with AI-driven products. Nice to have Exposure to projects involving AI solutions. Experience in working with Jira . A certificate to prove your Agile/Scrum skills. Other Project Management methodologies . Perks & Benefits Team-building & Company Events - After a day of focused work, there's nothing better than having a much-deserved mental break from responsibilities. Even better when it involves your pals! Be it a go-kart race with your team, a chill session of board games , or a couple of days in Prague - we do whatever fits our fancy. 🕺 Flexible working hours - Flexible working hours are not about being able to start your work within a specific timeframe. It's about maintaining the work-life balance you deserve . We have no strict "office hours" and embrace your early bird or night owl lifestyle. When you need to take a pause or manage your affairs, it's fine by us. However, we expect you to deliver the work on time and stay responsive on Slack if your colleagues need you (11-15 p.m.). 📲 Training budget - Whether it comes to AWS, Domain-Driven Development, Public Speaking training, and many more, we can match you with the best tutors 🧑‍🎓. Show us the direction you'd like to grow in, and we'll go above and beyond to meet your expectations. Personal branding - Build your true Pro status through blogging & social media activity as a company ambassador, your speeches at various conferences and meetups , hosting workshops , and participating in other exciting initiatives. Do it all with our backup. 🤝 Turquoise culture - you’ll have real influence over the shape of your role, a clear path for growth, and a meaningful voice in how the whole company evolves. We treat your CV as a starting point - not the final word. What matters most to us is how you think, solve problems, and approach real challenges, not just what’s written on paper. That’s why our process begins with a short recruitment task. It’s a chance for you to show your skills in practice and for us to better understand how you work.

🏢 Summary: Senior Fullstack Engineer role focused on building and maintaining production-grade, API-driven systems with AI-first development as a mandatory part of the workflow. The position involves designing scalable architectures, developing robust backend and frontend solutions, and critically evaluating AI-generated code. This is a hybrid, senior-level role requiring strong system design expertise and daily use of AI tools. 🗂️ Requirements: Senior-level experience in software engineering, Strong knowledge of JavaScript and TypeScript, Strong experience with Node.js and modern runtimes, Hands-on experience with React, Hands-on experience with Vue, Practical experience designing and integrating APIs, Strong understanding of software architecture and system design, Daily use of AI-assisted development tools, Ability to review and validate AI-generated code, On-site availability in Warsaw, Fluency in English 📃 Skills: JavaScript, TypeScript, Node.js, Bun, React, Vue, APIs, REST, Cursor, Copilot, ChatGPT 🏢 Description: Senior Fullstack Engineer (AI-First, Hybrid) Location: Warsaw, Poland 📍About the role: We are looking for a highly experienced Fullstack Engineer who builds real production systems and actively works with AI as a core part of their daily development workflow . This is not a remote role and not a junior or mid-level position. You will work on complex, API-driven systems where architecture, correctness, scalability, and long-term maintainability matter. Using AI for coding, design, refactoring, and problem-solving ( vibe coding ) is a hard requirement , not a nice-to-have. 📝What you will do: Design, develop, and evolve backend and frontend systems used in production Build, extend, and maintain robust APIs (both consuming external APIs and developing internal/public ones) Work daily with AI-assisted development tools as an integral part of your workflow Make architectural decisions with a focus on scalability, performance, and reliability Write clean, maintainable, well-structured code with long-term ownership in mind Collaborate closely with other engineers and product stakeholders in an on-site team Review, validate, and improve AI-generated code to ensure correctness, security, and performance 📝Must-have requirements: Strong, proven experience in software engineering (senior-level or higher) Excellent knowledge of: ○ JavaScript and TypeScript ○ Node.js and modern runtimes such as Bun Solid hands-on experience with both React and Vue Deep, practical experience working with APIs: ○ designing APIs ○ extending existing APIs ○ integrating third-party APIs Strong understanding of software architecture and system design High standards for code quality, readability, and maintainability Excellent command of AI-assisted development: ○ daily use of tools such as Cursor, Copilot, ChatGPT, or similar ○ ability to critically assess AI output instead of blindly accepting it ○ using AI for refactoring, debugging, testing, documentation, and exploration Comfortable working in an English-speaking environment 💎Nice to have Experience with DevOps , infrastructure, or production operations Experience working on high-traffic or business-critical systems Background in designing systems that evolve over time rather than one-off projects 📝Important notes AI-first development is a condition of employment We are looking for engineers who think in systems , not just frameworks We offer work on a modern application, A close-knit, experienced, and supportive team, private medical care and sports card If you prefer remote-only work or do not actively use AI in your daily coding, this role is not a good fit.

🏢 Summary: The offer is for a Senior AI Fullstack Engineer to design and deliver production-ready, LLM-powered web applications using modern React and Next.js architecture. The role focuses on building autonomous agents, RAG systems, and AI-driven workflows integrated with enterprise-grade products. It involves end-to-end ownership of scalable AI solutions from architecture to deployment. 🗂️ Requirements: 8+ years experience as consultant or forward deployed engineer, Strong experience with Next.js (App Router), React, TypeScript, Deep understanding of Server and Client Components (RSC), Experience with streaming, caching, revalidation, Server Actions, Experience with Vercel AI SDK, LangGraph or MCP, Experience building RAG systems, Hands-on experience with Anthropic and OpenAI APIs, Experience shipping LLM-powered features to production, Practical experience with prompt engineering and structured outputs, Experience with tool calling and agent workflows, Experience with multi-turn orchestration, Understanding of token economics and context windows, Experience with prompt evaluation methods, Ability to design robust, production-ready AI systems 📃 Skills: Next.js, React, TypeScript, RSC, Vercel, LangGraph, MCP, RAG, Claude, OpenAI, Anthropic, Prompting, Streaming, ServerActions, Agents, APIs 🏢 Description: About the Role At Blazity, we are a team of React.js and Next.js experts building modern, API-first digital products for enterprise clients. We are expanding our AI capabilities—autonomous agents, AI-driven automation, and LLM-powered workflows—and are looking for a Senior AI Fullstack Engineer who can design and ship production-ready AI systems. You will work at the intersection of modern web architecture and generative AI , taking ownership of solutions delivered to real users. Our requirements Must-have Technical Excellence: 8+ years of experience as a consultant / forward deployed engineer Strong experience with Next.js (App Router), React, TypeScript Deep understanding of: Server vs Client Components (RSC) streaming, caching, revalidation, Server Actions Vercel AI SDK / LangGraph / MCP Experience building RAG systems Claude extended thinking / prompt caching / Batch APIs AI Engineering: Proven experience shipping LLM-powered features to production Hands-on with Anthropic / OpenAI APIs (messages, tool use, streaming) Practical experience with: prompt engineering (structured output, few-shot, XML) tool calling / agent workflows multi-turn orchestration Understanding of: token economics (input/output costs, context window) latency vs quality trade-offs Reliability & Quality: Experience with: prompt evaluations (LLM-as-judge, rule-based) handling hallucinations and failure modes Ability to design robust AI systems , not just prototypes Soft Skills: Strong ownership mindset Experience working directly with clients Clear communication and structured thinking (English C1) Ability to make decisions in ambiguous environments Nice-to-have: What You Will Do Ship Production Apps: Build scalable web applications using Next.js (App Router) and TypeScript , ensuring high performance and clean architecture. Engineer AI Workflows: Develop and orchestrate LLM-powered features using Anthropic and OpenAI APIs, focusing on tool use and streaming. Agentic Orchestration: Design autonomous agent loops and multi-turn workflows, knowing when to use a structured pipeline versus a dynamic agent. Optimize & Evaluate: Manage token economics (pricing, context windows) and implement prompt evaluations (LLM-as-judge, rule-based) to ensure system reliability. Collaborate: Work directly with senior engineers, founders, and client teams to shape AI capabilities from concept to production. What we offer B2B: 120 – 180 PLN/h + VAT 🔥 100% remote (Poland) 29 paid vacation days Private healthcare + sports card High-impact work on real AI systems

🏢 Summary: Remote Senior FullStack Developer role focused on building and scaling end-to-end AI applications, agentic workflows, and modern front-end interfaces. The position involves designing AI-driven solutions, optimizing system architecture, and integrating LLM-based systems into production environments. You will work on data-heavy applications and enterprise automation within a fully remote project in Poland. 🗂️ Requirements: 5+ years of experience with Python for data-heavy or AI-integrated applications, Strong experience with Django, Flask or FastAPI, Strong mastery of Vanilla JavaScript, Hands-on experience with AngularJS and knowledge of migration to modern Angular, Experience building agentic AI systems and autonomous LLM-based workflows, Practical knowledge of LangChain, LlamaIndex and RAG, Experience with AI agent orchestration frameworks, Commercial experience with GCP or AWS, Proven experience with Google AppScript for enterprise automation, Strong understanding of RESTful APIs, Experience with asynchronous programming, Experience with end-to-end agentic workflows, Hands-on experience with GenAI technologies such as Gemini, Copilot or Claude 📃 Skills: Python, Django, Flask, FastAPI, JavaScript, AngularJS, Angular, LangChain, LlamaIndex, RAG, LLM, GCP, AWS, AppScript, REST, GenAI, Gemini, Copilot, Claude 🏢 Description: This is a remote position. As a Senior FullStack Developer at Virtusa , you will build and scale end-to-end AI applications, integrate automated workflows, and design intuitive front-end interfaces. You will diagnose architectural bottlenecks, propose AI-driven optimizations, and communicate directly with stakeholders to turn complex requirements into functional code. This is a fully remote project within Poland. Requirements At least 5 years of experience with Python (Django, Flask, or FastAPI), specifically for data-heavy or AI-integrated applications. Strong mastery of Vanilla JavaScript and hands-on experience with Angular JS (and familiarity with the migration path to modern Angular). Hands-on experience building agentic AI systems and autonomous workflows based on LLMs. Strong practical knowledge of: LangChain, LlamaIndex, RAG, AI agent orchestration frameworks. Commercial cloud experience: GCP (preferred) or AWS AppScript Expertise: Proven experience using Google AppScript for enterprise automation or custom add-ons. API Design: Deep understanding of RESTful APIs and asynchronous programming. Experience in end to end agentic workflows Strong experience in using Gen AI technologies : Gemini, co-pilot, claude AI Benefits Professional training programs Work with a team that is recognized for its excellence. We have been featured in the Deloitte Technology Fast 50 & FT 1000 rankings. We have also received the Great Place To Work® certification for seven years in a row

🏢 Summary: Remote Senior FullStack Developer role focused on building and scaling end-to-end AI applications with agentic workflows and intuitive front-end interfaces. The position involves designing AI-driven optimizations, integrating LLM-based systems, and developing data-heavy backend services. The role requires close collaboration with stakeholders to translate complex requirements into production-ready solutions. 🗂️ Requirements: Minimum 5 years of experience with Python (Django, Flask, or FastAPI), Experience building data-heavy or AI-integrated applications, Strong proficiency in Vanilla JavaScript, Hands-on experience with AngularJS and knowledge of migration to modern Angular, Experience building agentic AI systems based on LLMs, Practical knowledge of LangChain, LlamaIndex, RAG, and AI orchestration frameworks, Commercial cloud experience with GCP or AWS, Proven experience with Google AppScript for enterprise automation, Strong understanding of RESTful APIs, Experience with asynchronous programming, Experience designing end-to-end agentic workflows, Hands-on experience with Generative AI tools such as Gemini, Copilot, or Claude 📃 Skills: Python, Django, Flask, FastAPI, JavaScript, AngularJS, Angular, LangChain, LlamaIndex, RAG, LLM, GCP, AWS, AppScript, REST, Gemini, Copilot, Claude 🏢 Description: This is a remote position. As a Senior FullStack Developer at Virtusa , you will build and scale end-to-end AI applications, integrate automated workflows, and design intuitive front-end interfaces. You will diagnose architectural bottlenecks, propose AI-driven optimizations, and communicate directly with stakeholders to turn complex requirements into functional code. This is a fully remote project within Poland. Requirements At least 5 years of experience with Python (Django, Flask, or FastAPI), specifically for data-heavy or AI-integrated applications. Strong mastery of Vanilla JavaScript and hands-on experience with Angular JS (and familiarity with the migration path to modern Angular). Hands-on experience building agentic AI systems and autonomous workflows based on LLMs. Strong practical knowledge of: LangChain, LlamaIndex, RAG, AI agent orchestration frameworks. Commercial cloud experience: GCP (preferred) or AWS AppScript Expertise: Proven experience using Google AppScript for enterprise automation or custom add-ons. API Design: Deep understanding of RESTful APIs and asynchronous programming. Experience in end to end agentic workflows Strong experience in using Gen AI technologies : Gemini, co-pilot, claude AI Benefits Professional training programs Work with a team that is recognized for its excellence. We have been featured in the Deloitte Technology Fast 50 & FT 1000 rankings. We have also received the Great Place To Work® certification for seven years in a row

🏢 Summary: Fullstack Developer role focused on building and scaling web-based MVP products from scratch, collaborating with cross-functional teams and leveraging AI tools to deliver scalable, secure, and high-quality solutions. The position involves roadmap ownership, architecture design, cloud deployment, and continuous product improvement based on metrics and user feedback. 🗂️ Requirements: Proven experience as Fullstack Developer with portfolio of web-based products, Strong knowledge of TypeScript or JavaScript, Knowledge of at least one: Python, Rust, or C#, Experience with React and JSX-based frameworks, Experience with Next.js, Understanding of cloud computing platforms and networking, Experience with Docker and CDN technologies, Knowledge of Edge Workers, Experience with data modeling, Experience with relational databases, Knowledge of PostgreSQL, Architecture design skills, Ability to use AI tooling for coding productivity, Familiarity with Agile methodologies, Experience with Jira or Linear 📃 Skills: TypeScript, JavaScript, Python, Rust, C#, React, Next.js, JSX, Docker, CDN, EdgeWorkers, PostgreSQL, SQL, Cloud, AI, Jira, Linear, Agile 🏢 Description: We’re a well-knit digital design studio working with products, brands and (no-)code. Founders come to us because we help them define, build and scale their MVPs. That means we gotta think beyond “u mnie działa” (though we love all the memes). You’re free to do the job your way, but the team is there for you. Doesn’t matter if you’re just in a pickle or need a real talk about your career — there’s always folks happy to give you a hand. And hey, we’re not here to point the finger at what to do. If you see something we can improve or know how to reach our goals — do it and get your cred. The team is already asking about you. Don't make them wait, apply! Your day-to-day Developing and maintaining the product roadmap & ensuring alignment with the project vision. Collaborating with cross-functional teams, including product design, engineering, no-code, to ensure that the product meets the desired specifications Defining growth metrics for individual products in cooperation with the team Writing code with help of AI to match the best standards of product development. Ensuring the product is scalable, reliable, and secure Testing the product thoroughly to identify and fix any issues before launch Monitoring the product's performance and user feedback after launch, iterating and improving as necessary It's a match if you're like this Proven experience as a Fullstack Developer or a similar role, with a portfolio of successful web-based products Solid skills how to leverage AI tooling for productivity gains. Strong knowledge of modern web development languages, TypeScript/JavaScript, and at least one of Python, Rust, C#. Experience with React/JSX-based web frameworks, preferably Next.js (app directory) Strong understanding of cloud computing platforms, networks, and associated technologies like Docker, CDN, Edge Workers, etc. Knowledge of data modeling and relational databases preferably PostgreSQL Architecture design skills Familiarity with Agile development methodologies and project management tools such as Jira or Linear Excellent communication and collaboration skills Passion for innovation and a desire to stay up-to-date with the latest development trends and technologies (nice to have) Bachelor's degree in Computer Science, Engineering, or a related field If you are a highly motivated and skilled Fullstack Developer looking for an exciting opportunity to create innovative products from scratch, we invite you to apply for this position. What you get Work wherever & whenever you want (but bonus points for being relatively close to our HQ) Unlimited budget for growth Unlimited hardware & software budget Paid time off and sick leave No overtime (but paid double if you volunteer) Dinners, retreats, and workations Worksmile cafeteria plan The process 1. You first Hit that big Apply button and tell us about yourself. 2. Vibe check Let’s jump on a call, so we can both figure whether it’s a fit. 3. Show off We’ll ask you to do a little task (that we’ll pay for) so we can see your wizardry. 4. Join the team One last interview to talk details and that’s it, you’re on board! Find out more at tonik.com

🏢 Summary: Senior Full-Stack Engineer role in an AI-enabled SDLC environment, responsible for turning AI-generated prototypes into secure, performant, and production-ready features. The position involves end-to-end ownership across backend and frontend, with accountability for code quality, scalability, and reliability in enterprise SaaS products. Engineers act as technical guardrails, ensuring sound architecture, data integrity, and long-term maintainability. 🗂️ Requirements: 5+ years of experience building and shipping production software as a full-stack engineer, Strong proficiency in Python and experience with a mature Python web framework (e.g. Django), Strong proficiency in React and TypeScript, Experience designing and maintaining REST APIs, Experience with relational data modelling, Ability to review code critically and identify logic flaws, performance issues, and scalability risks, Experience owning features in production and fixing live issues, Ability to ensure security, performance, and data integrity in enterprise applications, Fluent English communication skills 📃 Skills: Python, Django, React, TypeScript, REST, SQL, APIs, DataModeling, Performance, Security, AI, Claude 🏢 Description: About Vatix Vatix is a fast-growing SaaS company founded in London and Kraków in 2019. We're on a mission to bring a fresh, user-centric approach to the world of Governance, Risk, and Compliance software — with a particular focus on Health & Safety and Operational Excellence. Today, over 800 businesses and government organisations around the world trust our platform to protect their people, streamline safety workflows, and drive operational performance. We're not VC-owned, and we're not chasing vanity metrics. Instead, we're building a long-term, sustainable company that's focused on solving real-world problems and becoming one of the most consequential players in our category. Our customers include industry leaders such as Cambridge University, Siemens, Intel, and major government departments — organisations that depend on us for mission-critical systems. At Vatix, you'll be working across a diverse product suite that spans web applications, mobile apps, IoT-enabled safety devices, and data platforms. That means a rare opportunity to learn and grow across a range of technologies — all while being supported by a collaborative team that values quality, simplicity, and mentorship. The role We're hiring senior full-stack engineers who can own the engineering judgement behind our product. Our SDLC is heavily AI-enabled: a lot of the time you'll be handed a working prototype rather than starting from a blank file. Your job is to make sure the logic and performance behind it are genuinely sound before it ships — and to own it in production once it does, including fixing the bugs. This is not a role where AI does the thinking for you. It's the opposite: AI accelerates the build, and you are the guardrail. You're the senior engineer who decides whether something is correct, performant, secure, and maintainable enough to put in front of enterprise customers — and who's accountable when it's live. What you'll do Take AI-generated prototypes from "it works on the happy path" to production-ready — interrogate the logic, find the edge cases, validate performance, and harden what's weak. Don't worry about AI slop. Prototype is there for Proof-of-concept. You are responsible for final solution that can but doesn't have to use components AI created Own features in production : you ship it, you own the bugs, you fix them. No throwing things over a wall. Act as the guardrail on AI-generated output — reviewing it the way you'd review a strong-but-junior engineer's work, and holding it to real engineering standards. Work across the stack in Python on the backend (REST APIs, data modelling, integrations) and React + TypeScript on the frontend. Care about the things that matter to enterprise customers: security, data integrity, performance, and a genuinely good user experience. Raise the engineering bar — review thoughtfully, mentor, and improve how the team builds with AI in the loop. How we work Our development process is heavily enhanced by AI, and we lean into it. But our engineers still own every decision. AI writes a lot of the first draft; people decide what's right, catch what's wrong, and are accountable for what ships. If you're excited by an AI-enabled SDLC where your judgement is the most valuable thing in the room — not threatened by it — you'll fit well here. We mainly use Claude Code with many skills and guidelines on top of it. What we're looking for 5+ years building and shipping production software as a full-stack engineer. Strong Python (we use Django; deep experience with any mature Python web framework transfers well) and strong React + TypeScript . A sharp eye for what's wrong with code that looks right — you can read an implementation and spot the broken logic, the N+1 query, the missing edge case, the thing that won't scale. Comfort with relational data modelling, designing clean REST APIs, and reasoning about performance and scale. Genuine ownership instinct — you stand behind what you ship and fix it when it breaks, rather than treating production as someone else's problem. Sound judgement about trade-offs: when something is good enough to ship, when it isn't, and where correctness is non-negotiable. Openness to an AI-enabled SDLC — you treat AI as a powerful tool you direct and verify, not as a replacement for engineering judgement. Clear communication in English, and the instinct to ask rather than guess. Nice to have Experience in B2B / enterprise SaaS, especially with security, compliance, or data-heavy products. Working with embedded analytics, data warehousing, or BI tooling. AI initiatives that improved velocity of the entire team Vatix is an equal opportunity employer. We welcome applicants from all backgrounds.

🏢 Summary: Senior Full-Stack Engineer role focused on taking AI-generated prototypes to secure, scalable, production-ready solutions in an AI-enabled SDLC. You will own features end-to-end, working across Python (Django) backend and React + TypeScript frontend, ensuring performance, correctness, and maintainability for enterprise customers. The position emphasizes strong engineering judgment, production ownership, and raising quality standards in AI-assisted development. 🗂️ Requirements: 5+ years of experience building and shipping production software as a full-stack engineer, Strong Python experience, Strong React and TypeScript experience, Experience with mature Python web frameworks (e.g., Django), Experience designing REST APIs, Experience with relational data modelling, Ability to analyze and optimize performance and scalability, Ability to review code critically and identify logical and performance issues, Experience owning features in production and fixing bugs, Fluent English communication skills 📃 Skills: Python, Django, React, TypeScript, REST, SQL, APIs, Git, Claude, AI 🏢 Description: The role We’re hiring senior full-stack engineers who can own the engineering judgement behind our product. Our SDLC is heavily AI-enabled: often you’ll be handed a working prototype rather than starting from a blank file. Your job is to ensure the logic and performance are sound before it ships — and to own it in production once it does, including fixing bugs. This is not a role where AI does the thinking for you. AI accelerates the build, and you act as the guardrail. You decide whether something is correct, performant, secure, and maintainable enough for enterprise customers — and you’re accountable once it’s live. What you’ll do - Take AI-generated prototypes from proof-of-concept to production-ready by validating logic, identifying edge cases, optimizing performance, and hardening weak points. - Own features in production: you ship it, you own the bugs, and you fix them. - Review AI-generated output to real engineering standards, as you would a strong junior engineer’s work. - Work across the stack in Python on the backend (REST APIs, data modelling, integrations) and React + TypeScript on the frontend. - Ensure security, data integrity, performance, and high-quality user experience for enterprise customers. - Raise engineering standards through thoughtful reviews, mentorship, and improving AI-assisted development practices. How we work Our development process is heavily enhanced by AI, but engineers own every decision. AI writes much of the first draft; engineers decide what’s right, catch what’s wrong, and remain accountable for what ships. We mainly use Claude Code with additional skills and guidelines on top. What we’re looking for - 5+ years building and shipping production software as a full-stack engineer. - Strong Python skills (we use Django; experience with mature Python web frameworks transfers well). - Strong React and TypeScript skills. - Ability to identify flawed logic, inefficient queries (e.g., N+1), missing edge cases, and scalability risks. - Experience with relational data modelling, clean REST API design, and reasoning about performance and scale. - Strong ownership mindset and accountability for production systems. - Sound judgement on trade-offs and engineering quality. - Openness to AI-enabled development workflows. - Clear communication in English. Nice to have - Experience in B2B / enterprise SaaS, especially security, compliance, or data-heavy products. - Experience with embedded analytics, data warehousing, or BI tooling. - Experience leading AI initiatives that improved team velocity. Vatix is an equal opportunity employer. We welcome applicants from all backgrounds.

🏢 Summary: Senior Full Stack Engineer role focused on building and owning end-to-end product features for an AI-driven platform that automates complex business processes. The position involves developing frontend and backend solutions, designing APIs, improving performance and usability, and leveraging AI tools in daily engineering work. The role is office-based in Warsaw and requires strong product thinking and production-level experience. 🗂️ Requirements: Senior-level experience building production web applications, Strong knowledge of React and TypeScript or similar frontend framework, Experience designing and developing backend APIs and application logic, Ability to build and maintain frontend and backend features end-to-end, Experience working with production environments and monitoring released features, Daily use of AI tools for development and problem-solving, Strong understanding of code quality, testing, and long-term ownership 📃 Skills: React, TypeScript, JavaScript, API, REST, Node.js, Python, GitHub, Copilot, Claude, OpenAI, Codex, TypingMind, MCP, AI 🏢 Description: About Us Many companies want to use AI agents, but these agents often have problems with complex business tasks. We help solve this issue. Our platform understands company rules, processes, and workflows, so AI can make better decisions instead of only giving simple answers. This allows businesses to use AI that is accurate, follows company policies, and can be trusted. Well-known companies use our technology to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that used to take hours in just a few seconds. We work with leading technology partners and have received industry recognition for our innovative approach. Our mission is to give people better answers everywhere. About the Role We are looking for a Senior Full Stack Engineer with strong product thinking. In this role, you will own features from start to finish. You will understand user needs, plan solutions, build frontend and backend functionality, release new features, and improve them based on user feedback. You should feel comfortable working on user interfaces, APIs, and production quality while collaborating with product and design teams. Location: Warsaw (office-based). Responsibilities Build and deliver product features across both frontend and backend. Turn product ideas into practical and effective solutions. Work with user interfaces, business logic, APIs, and data flows. Cooperate closely with product managers and designers, even when requirements are still developing. Improve usability, performance, reliability, and overall user experience. Monitor released features and use production data to make improvements. Use AI tools every day to work faster and improve engineering processes. Maintain high standards for code quality, testing, and long-term ownership. Requirements Strong experience as a senior engineer building production web applications. Good knowledge of React, TypeScript, or a similar modern frontend framework. Experience designing and developing backend APIs and application logic. Strong product mindset with the ability to identify and improve weak user experiences. Good decision-making skills when balancing scope, speed, and technical quality. Clear communication and teamwork across engineering, product, and design. Daily experience using AI tools for development and problem-solving. Nice to Have Experience building AI-powered products such as chat, search, recommendation systems, workflows, or AI agents. Knowledge of Python, Node.js, or both. Experience owning product areas independently. Understanding of performance optimization, accessibility, and high-quality web applications. What We Offer B2B contract and company stock options. MacBook Pro for work. Modern technology stack with opportunities to contribute to open-source projects. Advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP Servers. Why Join Us Our leadership team has strong experience in knowledge management and AI. We have raised more than $60 million in funding and achieved three years of continuous 3x growth. Our work is guided by these core values: Quality: We aim for excellent craftsmanship and high standards in everything we build. Momentum: We take initiative and keep projects moving forward. Accountability: We take responsibility, give honest feedback, and support each other. Hard Work: We believe difficult goals require dedication and teamwork. Learning Agility: We stay curious, learn from mistakes, and keep improving. Adapt and Thrive: We accept change and see challenges as opportunities. Win Together: We succeed as a team through honesty, openness, and shared commitment.