Senior Software Engineer | Full-Stack

As a Senior Engineer at DeepL, you will operate with the agency of a founder. You will join a high-performance engineering culture that values shipping speed, system reliability, and direct business impact over theoretical perfection, whether you are building our next-gen Voice API, architecting our massive billing engine, or scaling our core product platform, you will own your domain end-to-end.

Responsibilities

Own the Outcome, Not Just the Code: Own revenue-critical systems from the initial problem definition through to architectural design, deployment, and production reliability. Measure success by user impact, not just pull requests merged; Architect for Ambiguity: Make high-stakes technical decisions (monolith vs. microservice, consistency vs. availability) with incomplete information. Identify risks, build prototypes, iterate based on real-world feedback; Bridge the Gap: Be bilingual in Engineering and Business. Translate complex technical constraints (latency, eventual consistency) into business terms for Product Managers, ensuring we negotiate the right trade-offs to ship value faster; Drive Technical Pragmatism: Avoid Resume-Driven Development. Choose technology that solves the customer problem most effectively, ensuring long-term maintainability over short-term trends.

Requirements

A "System Thinker" Mindset: Understand failure modes, system boundaries, and how your code impacts the broader architecture at scale. Design systems that survive 10x growth; High Agency & Bias for Action: Don't wait for permission. If you see a fire, put it out. If documentation is missing, write it. Comfortable unblocking yourself and the team in a fast-paced environment; Product Fluency: Care deeply about the user. Ask 'Why are we building this?' before writing a line of code. Track record of shipping features that solve real business problems; Polyglot & Adaptable: Comfortable traversing the full stack, from the database lock to the UI state; AI-Native Velocity: Leverage AI-powered tools like GitHub Copilot or Claude to accelerate velocity and eliminate repetitive toil.

Nice to have

C#/.NET Core; React

Benefits

Diverse and internationally distributed team; Open communication, regular feedback; Hybrid work, flexible hours; Virtual Shares; Regular in-person team events; Monthly full-day hacking sessions (Hack Fridays); 30 days of annual leave; Access to mental health resources; Competitive benefits