Senior Java Developer with 10 years of experience (4 years remote, B2B), specializing in backend systems, team leadership and microservices for iGaming and FinTech. Proven track record in JVM tuning, Dockerized microservices, and production-grade observability. Experienced in sprint leadership, mentoring juniors, and aligning delivery with business goals.

Constantin Golan

Senior Java Developer with 10 years of experience (4 years remote, B2B), specializing in backend systems, team leadership and microservices for iGaming and FinTech. Proven track record in JVM tuning, Dockerized microservices, and production-grade observability. Experienced in sprint leadership, mentoring juniors, and aligning delivery with business goals.

Available to hire

Senior Java Developer with 10 years of experience (4 years remote, B2B), specializing in backend systems, team leadership and microservices for iGaming and FinTech. Proven track record in JVM tuning, Dockerized microservices, and production-grade observability. Experienced in sprint leadership, mentoring juniors, and aligning delivery with business goals.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate

Language

English
Fluent
Romanian, Moldavian, Moldovan
Fluent
Russian
Fluent
Spanish; Castilian
Advanced

Work Experience

Senior Software Engineer at Sports Betting & Casino
June 1, 2025 - June 1, 2025
Led sprint leadership, migrated from monolithic Java apps to Dockerized microservices, built reusable Grafana provisioning scripts, integrated monitoring with CI/CD, reduced JVM memory usage by 30%, improved deployment speed by 20%, and boosted DB query efficiency by 25%. Designed Gatling load tests simulating 10,000+ concurrent users and used profiling tools (JProfiler, VisualVM) to diagnose performance bottlenecks.
Senior Software Engineer at Surprise - Mobile Gaming
October 1, 2022 - October 1, 2022
Defined and implemented a billing API integrated with Stripe for the Payments Team. Conducted R&D to implement Playwright for end-to-end testing, automated client-to-Stripe tests with Jenkins. Built real-time metrics dashboards via Micrometer with Prometheus and Grafana; implemented Redis caching and Kafka-based streaming to improve scalability.
Senior Java Developer at Merkle
July 1, 2021 - July 1, 2021
Led migration from SVN to Git and implemented Git Flow to improve CI/CD processes. Managed payment gateway migration via SOAP protocol with minimal downtime. Trained and mentored junior developers; provided guidance in best practices, testing strategies, and API development. Provided 24/7 production support.
Junior Java Developer at Endava
October 1, 2015 - October 1, 2015
Client: Ladbrokes – iGaming. Led sessions on the iGaming business, deepened understanding, and contributed to a 20% reduction in release time. Took ownership to implement Linux OS as a host, resulting in improved team performance and recognition.
Internship Supervisor at Endava
December 1, 2015 - December 1, 2015
Designed and ran internship program for eight interns across Java and .NET teams; defined KPIs, milestones, and technical standards; led daily standups and 1-on-1s; tracked progress and accountability; reported progress and challenges to the practice lead and adjusted goals to keep everyone on track.

Education

Bachelor's degree in Economic Cybernetics and Computer Science at State University of Moldova
September 1, 2011 - June 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Gaming, Financial Services, Software & Internet

Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate

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