Senior Software Engineer (React/Typescript)

We're seeking a Senior Software Engineer (TypeScript/React) who is passionate about clean code, modern tools, and building new products 🤖 💻 Company: A European MarTech, delivering solutions to over 2,500 brands worldwide, including BMW, Nestlé, and L’Oréal. ​ Project: You are joining a brand-new R&D team to build an AI Agents Management Platform. 🔧Tech Stack: JavaScript (React/Typescript), HTML5, CSS3 ✨ Nice to have: GitHub Copilot or VS Code 📍 Work location: Poland, remote​ You are a Frontend expert at heart. Note: This is a dedicated Frontend role, not a Fullstack position.   What will your daily tasks look like? ​​📌​ Design and develop the frontend architecture for the new AI orchestration platform from scratch (design/architecture, development, implementation, testing). 📌​ Collaborate with Product designers, PMs & support to bring features to life. 📌​ Owning code quality (unit, integration, and other QAs tests). We encourage using AI assistants (like GitHub Copilot) to speed up unit testing. 📌 ​Create, maintain, and own code and application documentation.  📌 Assist the Support and Engineering team in debugging and troubleshooting software defects.  📌 ​​Coach and mentor junior devs and help shape the processes and selection of tools.  📌 ​Dive into architecture & contribute to research and specification phases with Product Managers while exploring new product ideas with the team.  We’re looking for​: ✅ ​6+ years of practical experience in the development of commercial-grade web-based software applications using JavaScript/TypeScript and front-end technologies: HTML5, CSS3. ✅ ​Good understanding and commercial experience with React. ✅ Proficiency in data-driven web applications.  ✅ You have a proven track record of working within in-house product teams (SaaS or complex internal platforms). We are looking for someone who understands the long-term product lifecycle, not just project-based delivery. ✅ A degree in Computer Science or a related engineering field is required. We value strong fundamentals in algorithms, data structures, and software design patterns. ✅ Familiarity with REST and modern tools: Webpack, Node.js, Yarn​. ✅ Strong communication & team spirit. ✅ Practical use of SOLID programming principles and SCRUM/KANBAN/AGILE workflows. ✅ Advanced English skills (spoken and written). ✨ Nice to have: GitHub Copilot or VS Code  What do we offer? 🎖️​ ​Supportive company culture – flat structure, strong teamwork, and openness to new ideas. 🎖️ ​Remote-first setup. Do you prefer slippers instead of shoes or maybe you are expecting Amazon delivery? No worries, we’ve got you covered. 🎖️ ​Private medical packages (Luxmed or Medicover) and Benefits System (multi-sport) will be covered 🎖️Freedom to influence tools, architecture, and processes.   Hello! I’m Olga and I am responsible for this recruitment process. If you have any questions, please feel free to reach out. I will be happy to meet you! Ref. no: SSEJ/12/2025/P   Contact details: 👩‍💻 Olga Kamińska, 📧 e-mail:olga.kaminska@hrcontact.co