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

United States Digital Space LLC; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work

Virtual Shares

30 days annual leave

Job summary

DeepL is looking for an experienced engineer to own the Identity Experience End-to-End, architecting and building features across our identity stack for internal and external users. You will help maintain secure authentication and authorization, delivering reliable, scalable solutions at global scale.

The role emphasizes four nines reliability, incident response, and collaboration across teams, with a strong focus on backend design in C#/.NET and frontend work using React/JavaScript.

Qualifications

• Strong experience designing scalable backend systems in production.

Responsibilities

• Own the Identity Experience End-to-End across the stack.
• Architect and build complex, user‑facing features for identity services.
• Ensure reliability, scalability, and security with four nines availability.

Skills

C#

React

JavaScript

Tools

GitHub Copilot

Claude

Job description

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 apartWhat 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 onLinkedIn,Instagram, and our Blog.

Meet the team behind this journeyDeepL 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 at scale. When 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 at scale. You 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 the frontend (React/Javascript) is a welcome plus, not a requirement

• Enterprise Domain Curiosity: You are interested in the hard problems of B2B SaaS Identity - authentication (SSO/OIDC), authorization, and requirements such as security and auditing. You understand that these aren't "boring details"; they are the pillars of trust for enterprise clients

• AI‑Native Velocity: You leverage AI‑powered tools (like GitHub Copilot or Claude) to accelerate your velocity and eliminate repetitive toil. You use AI for boilerplate code, test generation, and debugging, allowing you to focus your cognitive energy on high‑value architectural decisions and complex problem-solving

A Note on Our Hiring Process: the company 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 skillset—whether that is in Core Product, Platform, Voice, or Enterprise. We prioritize "Missionaries" who want to solve the biggest problems, wherever they live in the stack.

What we offer

• Diverse and internationally distributed team: joining our team means becoming part of a large, global community with people of more than 90 nationalities. We're more than just colleagues; we're a group of professionals with a shared mission to connect diverse cultures. Our global presence is growing–we've doubled in size nearly every year, with our employees based in the UK, Germany, the Netherlands, Poland, the US, and Japan, and we continue to expand our network.

• Open communication, regular feedback: as a language‑focused company, we value the importance of clear, honest communication. We value smooth collaboration, direct and actionable feedback, and believe that leading with empathy and growth mindset makes us better together.

• Hybrid work, flexible hours: we offer a hybrid work schedule, with team members coming into the office twice a week. This allows you to engage directly with your team and experience the unique energy of our workspace, while still enjoying the flexibility and comfort of working from home. With flexible working hours and trust in your productivity, we are in sync with your team’s general locations and time zones to foster effective and seamless collaboration.

• Virtual Shares: An ownership mindset in every role. We believe everyone should share in our success, and that’s why every employee receives Virtual Shares, linking your contribution directly to the company’s growth and rewarding you with a stake in our future.

• Regular in‑person team events: we bond over vibrant events that are as unique as our team, from local team and business unit gatherings, to new‑joiner onboardings, to company‑wide events that bring us all together–literally.

• Monthly full‑day hacking sessions: every month, we have Hack Fridays, where you can spend your time diving into a project you're passionate about and get the opportunity to work with other teams–we value your initiatives, impact, and creativity.

• 30 days of annual leave: we value your peace of mind. With 30 days off (excluding public holidays) and access to mental health resources, we make sure you're as strong mentally as you are professionally.

• Competitive benefits: just as our team spans the globe, so does our benefits package. We've crafted it to reflect the diversity of our team and tailored it to align with your unique location, to ensure you feel supported every step of the way.

We are an equal opportunity employerYou are welcome at the company 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! So bring us your personal experience, your perspectives, and your background. It’s in our diversity that we will find the power to break down language barriers in the world.