Senior Software Engineer API (f/m/d) - Node.js, SQL

We use AI to accelerate – not to replace thinking.
We design the system, steer the output, and take responsibility for what we ship.
Fast where it makes sense. Careful where it matters.

Activities

• Develop and maintain microservices that connect worlds (internal & external systems).
• Command side quests (and sometimes the main questline) when the Tech Lead is away from keyboard.
• Shape the team’s strategy with your strong opinions and battle-tested experience.
• Master the arts of authentication & authorization (OAuth, Auth0 integrations, specs reading = your spellbook).
• Design & optimize SQL databases like a level 99 architect (bonus points for PostgreSQL mastery).

Requirements

Must-haves:

• 5+ years XP as Backend/API Developer in Node.js + TypeScript.
• Legendary SQL & DB design skills (PostgreSQL = epic weapon).
• ORM wisdom (knowing both the buffs and nerfs).
• Strong in automated testing (jest/mocha, coverage quests).
• Docker, Git, JavaScript, SQL – all mastered.

Nice-to-haves:

• AWS, Grafana, Prometheus, Graylog.
• Academic background (Computer Science, Software Engineering).
• Leadership XP (professional, not disciplinary).

Team

• Ownership over tickets: You’re trusted with real responsibility, not just tasks. No unnecessary bureaucracy, no micromanagement – we rely on you to take things forward.
• Build > Talk: We test what works – not what sounds good. Fail fast, learn faster.
• High standards, low ego: We take our work seriously, but not ourselves. Direct feedback, honest collaboration, no drama.
• Stay sharp: Hackathons, conferences, community – we invest in your growth and keep you at the cutting edge.
• And yes – the fundamentals are covered too: 30 days of vacation + Dec 24 & 31 off, Smart Fridays (4 days week possible), mobility (Germany ticket & JobRad), sports & health offerings, mental health support, corporate benefits, RTL+ access, and more.

Application Process

1. A quick intro call with Sarah (Head of Talent Acquisition @smartclip)
2. Video call with your future manager and a teammate – real talk, no script
3. Meet us in Berlin: hands-on case study, coding challenge (pair programming), or a role play – depending on the role
4. Prompt, honest feedback from Sarah – no ghosting, we promise