Senior Software Engineer | Language Products | Full-Stack

DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. You will join the Language Products Track, building and expanding our flagship translation products, core engines that power everything from the consumer web translator to the Enterprise Customization Hub (Glossaries, Translation Memory, and Style Rules) and complex multimedia localization flows.

Responsibilities

Own the Core Experience End-to-End: Architect and build complex, user-facing features across our primary translation products; Build for "Consumer-Grade" Enterprise: Solve a unique product challenge building an interface that feels instant and magical for B2C users but powerful enough for enterprise teams; Architect for Ambiguity: Make high-stakes technical decisions regarding state management, API integrations, and performance; Bridge the Gap: Collaborate closely with Research, Product, and Design teams to translate complex AI constraints into an intuitive UX

Requirements

A "Product-First" Mindset: You care deeply about who uses your software. You ask "Why are we building this?" before writing a line of code. You measure success by user adoption and reduced friction, not just pull requests merged.; Front-end Heavy Full-Stack Fluency: You are a strong Front End engineer who is comfortable traversing the stack to deliver a feature. You can build a highly interactive, performant UI in React and design the supporting backend logic in Python and C#/.NET Core, with the support of agentic tooling.; High Agency & Bias for Action: You don't wait for permission. If you see a performance bottleneck in the translation flow, you profile it. If the documentation for a new API is missing, you write it. You are comfortable unblocking yourself and your team.; A "System Thinker" for UI/UX: You understand that a simple UI often hides massive backend complexity. You can design systems that handle large document states, manage complex terminology rules (Glossaries), and maintain high performance in the browser.

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; 30 days of annual leave; access to mental health resources; Competitive benefits