Full Stack Developer (Next.js / NestJS)

You will join a fast-growing climate tech company dedicated to helping organizations measure and reduce their carbon footprint. The platform transforms complex environmental data from logistics and supply chains into actionable insights. As a developer, you will have a direct impact on the product’s architecture, building a scalable SaaS solution that helps solve real-world environmental challenges. Details • Sector: Climate Tech / Sustainability • Location: Remote or hybrid from Kraków, Wrocław, Rzeszów, or Poznań • Contract Type: B2B • Culture: Informal atmosphere with a focus on work-life balance and flexible hours Responsibilities • Full Stack Development: Building and scaling production-ready applications using Next.js and NestJS. • Architecture & Design: Making critical decisions regarding system structure, scalability, and maintainability. • Data Processing: Working with large datasets related to transport and emissions, ensuring high performance and clean architecture. • Collaboration: Working closely with product and business stakeholders to influence the roadmap and technology decisions. • API Design: Designing and implementing robust REST APIs. Requirements • Backend Expertise: Solid experience with Node.js and NestJS in backend development. • Frontend Mastery: Strong hands-on experience with Next.js and React. • Database Skills: Experience with PostgreSQL, including data modeling, performance tuning, and complex queries. • Core Languages: Excellent knowledge of TypeScript and modern JavaScript (ES6+). • Language: Fluent English for international collaboration. • Mindset: A strong ownership mindset and problem-solving skills to work independently on complex features. Nice to Have • Cloud & DevOps: Experience with Azure (or similar), Docker, and CI/CD pipelines. • Domain Interest: A genuine interest or prior experience in the sustainability and climate tech domain.