Senior Full Stack developer (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.