Senior Software Engineer (ID Verification Team)

SEON is the command center for fraud prevention and AML compliance, helping thousands of companies worldwide stop fraud, reduce risk and protect revenue. Powered by 900+ real-time, first-party data signals, SEON enriches customer profiles, flags suspicious behavior and streamlines compliance workflows - all from one place. SEON provides richer data, more flexible and transparent analysis, and faster time to value than any other provider on the market. We’ve helped companies reduce fraud by 95% and achieve 32x ROI, and we’re growing fast, thanks to our partnerships with some of the world’s most ambitious digital brands like Revolut, Wise, and Bilt. A Senior Software Engineer in our organization brings strong software engineering expertise first but also comes with a strong mentoring mindset to support engineering teams and work closely with our engineering leadership. SEON relies on a product-led growth approach. Join our ID Verification Team , responsible for a vital and growing product within SEON. We own the development of our ID verification services, encompassing multiple backend components, SDKs, and the relevant parts of our customer-facing platforms. As we evolve our currently beta product into a core part of SEON's fraud analysis suite, we are focused on continuous feature delivery and exploring innovative improvements to enhance our customers' fraud prevention workflows. Our work spans frontend development (React-based SDK and admin dashboard), backend and Lambda functions (Node.js), database design (Postgres + pgvector), and architecting solutions for intricate technical problems. This role offers flexibility and is based in our Budapest office with a hybrid work schedule. WHAT YOU’LL DO: Contribute to our ID Verification team, which is growing to be an essential part of our fraud prevention solution Deliver high-quality NodeJS, TypeScript and React code with simplicity, performance, and scalability in mind Work together with the team to design and implement cutting edge client and database-related application features Maintain & develop in NodeJS, TypeScript, React, NestJS, REST, RDBMS & backend of our applications Supporting, refining and suggesting improvements to the current codebase Providing expertise, reviewing pull requests of other team members suggesting improvements and best practices for the team Help during the whole Software Development Life Cycle including the design of new features and services Bring an engineering mindset, you care about how things work, how they scale, and how they can be improved over time. WHAT YOU’ll BRING: At least 5+ years experience in fullstack software engineering (NodeJS, TypeScript, React, REST, RDBMS, NOSQL) Agile & iterative mindset (end-to-end responsibility; you build it, you run it) End to end ownership from product requirements, planning, implementation and rollout. Strong experience in automated tests Strong experience in performance optimization Knowledge & understanding of IT security Experience in designing modular systems and refactoring / decoupling monoliths, working with microservices Familiarity with event-driven architecture Experience in containerization (Docker) and Kubernetes Experience in continuous integration and delivery Experience working in self organizing cross-functional teams Excellent problem-solving skills Experience in mentoring senior and mid-weight colleagues English Language Proficiency Experience in pair programming, TDD and Trunk Based Development (pro) Experience in AWS (pro) AMAZING IF YOU ALSO HAVE: Hands on experience with SDK development Hands on experience with ID Verification SEON Technologies collects and processes personal data in accordance with applicable data protection laws. If you are a European Job Applicant see the privacy notice for further details. SEON is an equal opportunity employer. We strive to embrace what makes each one of us unique; we each have our own story. Whether looking at our current staff or future team members, we believe that everyone has something to contribute, and our employment practices reflect that. We do not make an employment decision based upon race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Please let your recruiter know if you need reasonable adjustments to our recruitment process.