Senior Full-Stack Developer (.Net/React) - Warsaw/Poznań

O projekcie: Job description Our client is seeking a Senior Full-Stack Developer (with Optimizely) to join their IT Systems Development & Maintenance team in Poznań and Warsaw. Operating in a dynamic and fast-paced environment, our client is focused on building solutions that support responsible living and a better future for generations to come. Your future team: Our client is developing a new e-commerce and marketing platform based on composable, headless, cloud architecture. The goal is to deliver a seamless and fully tailored end-to-end customer experience. In this role, you will join a collaborative team of 12 specialists, primarily located in Poznań. The team is known for strong cooperation, a positive atmosphere, and shared interests such as playing billiards. What our client offers: By joining our client’s organization, you will become part of a people-centric work environment rooted in Danish culture. The offer includes a competitive salary, the possibility of a permanent contract after the probation period, a development package, team-building events, and modern offices in the city centers of Poznań and Warsaw. The office buildings are fully accessible and adapted to the needs of people with disabilities. Compensation package includes: - Office-first approach with the option to work remotely up to 2 days per week - Flexible working hours (start between 7:00 AM and 9:00 AM) - Home office subsidy - Private medical care - Multikafeteria MyBenefit - Wellbeing program - Additional day off for voluntary activities Additionally, employees can enjoy a modern office space with a beautiful view and high-standard furniture, bicycle parking facilities and showers, chill-out rooms (PlayStation, table football, pool table, board games), as well as a subsidized canteen offering fresh meals and fruit. Wymagania: What you bring: - 4+ years of hands-on experience in Microsoft .NET/ASP.NET Core and SQL Server; - Solid grasp of software design patterns and architectural principles; - Proven experience in full-stack development with C# and web technologies; - Strong understanding of performance, quality, and security in web applications; - Familiarity with Agile practices like CI/CD, TDD, and code reviews; - English proficiency at B2 level or higher (spoken and written); - Passion for GenAI and its potential to enhance and automate the software development lifecycle; - Experience with React - Azure cloud; Preferred skills: - Serverless/microservices architectures (Docker); - RESTful APIs on .NET; - Headless CMS Optimizely setups – Optimizely DXP; - Algolia Search (as a bonus) Codzienne zadania: - Developing robust, scalable technical solutions;  - Implementing and maintaining automated build and deployment pipelines;  - Developing features across the stack - from data access and business logic to UI;  - Writing unit tests, fixing bugs, and documenting when needed to support sprint goals;  - Troubleshooting and resolving production issues;  - Collaborating closely with business stakeholders.