Senior Software Engineer | Enterprise | Full-Stack in London

Meet DeepL. DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. Over 200,000 business customers and millions of individuals across 228 global markets today trust DeepL's Language AI platform for human-like translation, improved writing and real-time voice translation. Founded in 2017, DeepL now has around 1,000 passionate employees and is supported by world-renowned investors. Our goal is to become the global leader in trusted, intelligent AI technology, building products that drive better communication, foster connections, and create a meaningful impact.

What sets us apart is our blend of cutting-edge AI technology, meaningful work, and a culture where people truly thrive. We’re a team of innovators, researchers, and creators driven by a shared purpose to unlock human potential by making work simpler, smarter, and more connected. This might be because of our technology that helps millions of people and businesses communicate and work better every day, or because of the trust, curiosity, and care that shape our culture. Being part of DeepL means joining a team dedicated to innovation, growth, and well-being.

DeepL is not just a translation tool; we are building the Operating System for Global Communication. We are the rare AI company that builds the entire stack in-house: from training next-gen LLMs to delivering real-time Language AI to over 300 million users and 200,000+ businesses globally. You will join the Business Acceleration Track (BAT). This is the engine room of DeepL’s global growth. While our Research teams build the models, BAT builds the Revenue Flywheel that allows 200,000+ Enterprises to actually use and pay for them at scale. We are moving upmarket, transitioning from a consumer-focused app to a mission-critical Enterprise Platform.

You will be part of the team architecting the "Financial Nervous System" of DeepL — handling everything from Identity & Access Management to complex multi-seat Subscription Architectures and Fraud Prevention. We don't hire engineers to just implement UI tickets. We hire Missionaries who understand that a perfect AI model is useless if a Global Enterprise can't provision it securely to 50,000 employees. You will own the full vertical: from the user-facing Admin Console in React to the distributed billing logic in C#/.NET.

Your responsibilities:

• Architect Revenue-Critical Flows: You will design and ship complex, high-stakes features like "Enterprise Licensing" or "Automated Seat Provisioning." You ensure that when a customer upgrades, the UX is instant, and the billing ledger is immutable.
• Own the "Enterprise Experience": You will build the tools that empower CIOs and IT Directors to manage DeepL. You translate complex backend constraints into simple, elegant UI workflows.
• Bridge the Gap: You are bilingual in "Engineering" and "Business." You work directly with Sales, Product, and Finance to translate "Annual Recurring Revenue" goals into scalable technical architectures.
• Drive System Reliability: You understand that billing systems cannot fail. You build for idempotency and resilience, ensuring that our financial data is auditable and flawless, while maintaining a high-velocity frontend experience.

Qualities we look for:

• A "Product-First" Mindset: You care deeply about the customer journey.
• Full-Stack Fluency: You are comfortable traversing the stack.
• Enterprise Domain Curiosity: You are interested in the hard problems of B2B SaaS.
• High Agency: You don't wait for permission.
• AI-Native Velocity: You leverage AI-powered tools to accelerate your velocity.

A Note on Our Hiring Process: DeepL hires for the Company, not just a specific team. We operate a Unified Engineering Pipeline. If you pass our bar, we will match you to the highest-priority role that fits your skill set.

What we offer:

• Diverse and internationally distributed team.
• Open communication, regular feedback.
• Hybrid work, flexible hours.
• Virtual Shares - An ownership mindset in every role.
• Regular in-person team events.
• Monthly full-day hacking sessions.
• 30 days of annual leave.
• Competitive benefits.

We are an equal opportunity employer. You are welcome at DeepL for who you are - we appreciate authenticity here. Our product is for everyone, and so is our workplace. The more voices we have represented and amplified in our business, the more we will all succeed, contribute, and think forward!