Full Stack AI Engineer (remote)

We are seeking a Senior Full Stack Engineer to join a fast-growing SaaS company. The role will strengthen existing product teams, accelerate AI readiness initiatives, and support a company-wide rebrand implementation project. Position: Senior Full Stack Engineer Location: Central/Western Europe (CET/WET) Contract: B2B Responsibilities Deliver end-to-end features across backend and frontend, with emphasis on backend. Contribute to refactoring and modernizing systems as well as new feature delivery. Collaborate with product, design, and research teams in a distributed environment. Implement design updates as part of a rebranding initiative (typography, assets, UI components). Must-Have Skills 8+ years in engineering, with proven SaaS/B2B experience. Strong in TypeScript, Node.js, React, PostgreSQL. Exposure to system design and scaling at enterprise or large project level. Ability to ship high-quality features fast. Experience migrating legacy systems or supporting multi-region infra is a plus. Soft Skills Agentic mindset: outcome-driven problem solver, not bound by process. Excellent cross-team communication in distributed environments. What we offer: Competitive salary and bonuses Flexible work hours Remote job Professional development opportunities Vibrant workplace culture Why working at Diffco? Great experience and opportunity: You will work on the fast-forward projects in Silicon Valley utilizing the latest technologies, methodologies, frameworks and approaches with the ability and time to learn and develop professionally. Professional and harmonious team of friends: Our team is a second family, so you would enjoy spending the day working on nice projects with kind people with broad interests. A vast field for growth: Learn continuously, expand your skills and demonstrate your professional level and ability to take more responsibility to grow. Great company culture: We care about you and are interested in your personal professional goals, motivation and we build a perfect work/life balance.