Personal details
Roland
About
I’m a senior Java developer with 8+ years in backend engineering, including 5+ years building Spring Boot microservices for banking, payments and digital learning platforms.
At First City Monument Bank, I redesigned a payment flow as an event-driven Spring Boot service on Kafka. It now handles 300 transactions per second at a 98.6% success rate. I also found and fixed an account-number vulnerability, avoiding an estimated £200,000 in losses.
My core stack is Java, Spring Boot, Spring Data JPA, SQL Server and MySQL, tested with JUnit 5 and REST Assured. I run services on AWS and Kubernetes with Terraform and monitor them in Datadog. I’ve also built React and TypeScript features and a production RAG platform.
I currently review Java and security code for AI model evaluation at Mercor. I’ve worked remotely with UK and European teams for over three years and am available during US working hours. I hold the AWS Certified Generative AI Developer, Professional certification.
Work Experience
Develop high-performance, scalable, and reliable code by executing design decisions for core Java services in alignment with Mintra's high coding standards. Utilize tools including Java 11 and 17 (Spring Boot 3, Maven), ActiveMQ, ElasticSearch, MySQL, Git, Docker, AWS, CQRS, and Domain-Driven Design through effective collaboration and project ownership.
- Achieved at least 99% uptime by diagnosing and resolving critical production issues using advanced Java debugging and troubleshooting techniques in close collaboration with other teams.
- Delivered critical project milestones on time by managing tasks effectively with project management tools such as JIRA.
- Ensured at least 80% test coverage through writing unit and integration tests following Test Driven Development.
- Led enhancement of platform's capabilities, facilitating seamless connections and payments between users and businesses via USSD-Web3 Wallets. Utilized cryptocurrency to optimize payment services, significantly improving the overall user experience. Collaborated closely with team members to identify areas for improvement, designing and implementing effective solutions to address these challenges.
● Directed development and implementation of new features, bug fixes, and patch sets for SendCrypto USSD-web applications, ensuring timely and efficient delivery of high-quality solutions.
Page1|2
● Designed and built a RESTful API for management of custodial wallets via USSD, utilizing efficient coding practices to deliver high-quality code 20% faster than initially projected.