Software Engineer (Customer Platform Team)
Confirmed on the employer's own hiring board on Oct 22, 2026. First seen by Alion on Dec 19, 2025.
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 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.
Our Customer Platform Team is the heart of SEON: we develop core services supporting the whole system of SEON and the primary customer-facing application. We’re continuously adding new features to improve the UX and workflow for our customers and their fraud analysis capabilities. This mission involves core product functions such as backend and frontend development, R&D, design, and database development.
This role offers flexibility and is based in our Budapest office with a hybrid work schedule.
WHAT YOU’LL DO:
Contribute to our Customer Platform 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 4 + 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 Clickhouse
Hands on experience with NoSQL
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.