Senior Software Engineer | Identity and Access Management | Full-Stack

Meet DeepLDeepL 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 the company's Language AI platform for human‑like translation, improved writing and real‑time voice translation.

Founded in 2017 by CEO Jaroslaw “Jarek” Kutylowski, the company now has around 1,000 passionate employees and is supported by world‑renowned investors including Benchmark, IVP, and Index Ventures.

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. To achieve this, we need talented people like you to join our journey. If you’re ready to shape the future of AI and grow your career in a fast‑moving, purpose‑driven environment, the company is your next destination.

What sets us apart

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.

When we share what it’s like to work at the company, the reactions are overwhelmingly positive. 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.

What we know for sure is this: being part of the company means joining a team dedicated to innovation, growth, and well‑being. Discover more about life at the company onLinked

In,Instagram, and our Blog.

Meet the team behind this journey

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 on our own NVIDIA DGX SuperPODs to delivering real‑time Language AI to over 300 million users and 200,000+ businesses globally.

You will join the Identity and Access Management team. Owning the company's full identity stack: organisation, account and session management, SSO federation, SCIM provisioning, and the OIDC provider, for both internal and external users. It is the foundation every the company product relies on to authenticate and authorise users securely and n identity is unavailable, no one can log in, so reliability and performance sit at the heart of everything the team does.

We are shifting gears from "Software-First" to "Product-First." We don't hire engineers to simply maintain legacy endpoints or close Jira tickets. We hire Missionaries — builders who obsess over the Why before the How. You will contribute across the stack, shipping features that create delightful, frictionless experiences for both external developers and internal engineering teams.

Your responsibilities Own the Identity Experience End-to-End:
You will architect and build complex, user-facing features across our identity stack. You will own business‑critical systems from the initial problem definition through to architectural design, deployment, and production reliability. You measure success by user impact, not just pull requests merged

Qualities we look for Extreme Ownership & Operational Excellence:
You own your services end-to-end (production operations, incident response, and on-call) and you're motivated by pushing reliability toward four nines. You write comprehensive tests, monitor the systems in production, and you treat each incident as an opportunity to learn

• A "System Thinker" Mindset:
  You don't just know syntax; you understand failure modes, system boundaries, and how your code impacts the broader architecture  can design systems that deliver high availability for our millions of users.

• Backend Mastery at Scale (C# / .NET):
  You have deep expertise designing scalable backend systems and distributed architectures, and you've worked with high‑scale distributed systems in production. Strong system design is core to how you work. Roughly 80-90% of the work is backend; working on…