Senior Java Software Engineer, Data Enrichment

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.

As a senior-level Software Engineer, you will play a critical role in designing, developing, and maintaining, software systems and infrastructure for data collection pipelines in the Data Enrichment domain. You will focus on creating software to enable extracting and ingesting data from different websites using web crawling tools or APIs and provide that to other services or customers through APIs. Additionally, you will mentor team members, contribute to their technical growth, and collaborate with the Engineering Manager on shaping the technical aspects of their career plans.

This role reports into the Engineering Manager of Data Enrichment.

This role offers flexibility and is based in our Budapest office with a hybrid schedule of being in the office approximately three days per week.

What You'll Do:

• Lead the design and development of robust, scalable backend components using Java and Spring framework.

• Contribute to the redesign and modernization of a legacy Python-based system.

• Collaborate on API design, system architecture, and performance tuning.

• Identify and resolve complex technical challenges; continuously improve code quality, maintainability, and system performance.

• Evaluate and integrate tools or frameworks that improve reliability and development efficiency.

• Mentor engineers through code reviews, pairing, and technical guidance.

• Work closely with the Engineering Manager to support team members’ technical career development.

• Collaborate with Product Management and other Engineering teams to align technical work with business goals.

• Take ownership of the design, implementation, and delivery of high-impact backend features.

• Provide clear effort estimates, contribute to defining the “definition of done” and ensure timely delivery of initiatives.

• Monitor engineering KPIs and suggest improvements based on insights from team-specific metrics.

• Maintain a culture of accountability and reliability in the delivery process.

• Contribute to improving monitoring and observability for both new and existing systems.

• Support production systems by diagnosing and resolving issues quickly.

• Proactively improve system reliability and reduce operational burden through automation and architectural improvements.

What You Bring:

• Strong expertise in Java (preferably Java 17+) and Spring Framework (Spring Boot, Spring MVC, etc.).

• Experience designing API and highly scalable production backend systems.

• Familiarity with distributed systems, microservices, and performance optimization.

• Experience with SQL/NoSQL databases and modern DevOps practices (CI/CD, containers, etc.).

• Excellent collaboration skills and experience mentoring or supporting fellow engineers.

• Strong analytical thinking and problem-solving skills.

• Fluent in English (written and spoken).

Amazing if You Also Have:

• Working knowledge of Python 3.9+ (or willingness to learn) to interact with and understand parts of the legacy system.

• Experience with web crawling, scraping, or data ingestion pipelines.

• Exposure to monitoring, observability tools, and distributed tracing.

• Familiarity with AWS services, Kubernetes, and modern deployment pipelines.

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.