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Software Engineer (AML Team)

SEON - Budapest, Hungary - Hybrid - posted 2026-10-20

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SEON is a fraud prevention and AML compliance platform serving thousands of companies globally, including Revolut, Wise, and Bilt. The platform uses 900+ real-time data signals to enrich customer profiles, flag suspicious behavior, and streamline compliance workflows. As a Software Engineer on the AML team, you will build and maintain TypeScript applications and services powering SEON's AML products. You'll work closely with product managers to translate customer needs and feature requests into well-scoped, high-quality deliverables. The role emphasizes ownership from scoping through delivery, continuous learning, and helping teammates grow. Key responsibilities include: - Implement TypeScript features for AML services (case management, business backends, person service) and the customer-facing Admin Panel, with attention to design, performance, and error handling - Contribute to design discussions with informed questions and explain reasoning behind technical decisions - Scope work independently, confirm completion criteria with PMs and partners, and raise requirement issues early - Deliver high-quality code focused on simplicity, security, testability, performance, and scalability - Maintain and develop client-side JavaScript libraries, Node.js backends, and Nest.js/Express.js services - Debug moderately complex issues independently using observability tools; identify root causes and close monitoring gaps - Write tests for features and design testing approaches for complex functionality - Review team code with focus on security, performance, and quality; provide constructive feedback - Collaborate with PMs, QA, architects, and DevOps teams; frame technical decisions in terms of customer outcomes - Contribute to planning and estimation - Improve CI/CD pipelines and development tooling by removing bottlenecks; keep pull requests small and reviewable - Mentor junior teammates with structured intent - Work with large datasets (screening, watchlist data) ensuring performance, accuracy, and auditability - Use AI-assisted development tools and help identify where AI can improve products and development processes - Help teammates adopt AI practices by sharing effective prompting patterns Requirements: - At least 3 years of software development experience - Excellent problem-solving skills - Strong working knowledge of JavaScript/TypeScript and solid knowledge of HTML5/CSS3 and RESTful API development - Ability to cooperate with team members in an Agile environment - Experience scoping and delivering features independently, from ambiguous requirements to validated work - Experience debugging issues across services using observability tools - Out-of-the-box thinking combined with ability to adapt to fast-paced environments - Fluency in English - Technical stack: JavaScript, TypeScript, React, Node, NestJS, HTML5, CSS3 (Sass), PostgreSQL Nice to have: - Experience with data-heavy applications - Experience in regulated industries (AML, KYC, financial services) - AWS - Terraform

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