Senior Software Engineer | Voice | Full-Stack

Join DeepL Voice to shape real-time interpretation as part of the 0-to-1 engineering effort. You’ll help build end-to-end features from frontend UIs to streaming backend services and AI inference. You’ll tackle latency, transcript stability, and seamless audio delivery in a cross-functional squad. This role combines innovative AI work with a strong product focus, contributing to DeepL’s mission to enable natural, barrier-free global communication.

• Hybrid work
• 30 days annual leave
• Virtual Shares
• regular in-person team events
• monthly hack Fridays
• competitive benefits tailored to location

• Prototype and scale new features in a fast-moving, ambiguous environment
• Prioritize the human experience by optimizing latency and transcript stability
• Develop end-to-end features across frontend, streaming backend, and AI inference
• Diagnose and resolve real-time communication edge cases (latency spikes, flicker, audio glitches)
• Collaborate closely with PMs, Designers, and AI Researchers to scope and solve problems
• Help shape and ship high-impact features in a unified engineering pipeline

• 0-to-1 builder mindset in ambiguous environments
• Product-first approach prioritizing user experience over raw accuracy
• Full-stack fluency with frontend (React/TypeScript) and backend (Node.js/TypeScript)
• Real-time, latency-sensitive systems (WebRTC, WebSockets, streaming architectures)
• High initiative and ability to automate and improve processes
• Experience with AI-powered tooling to accelerate development and debugging

• cross-functional collaboration
• customer-focused mindset
• proactiveness and ownership
• React
• TypeScript
• Node.js