Hi, I'm Shyam Sundar
Senior Backend Engineer
Building scalable backend systems using
Java • Spring Boot • Microservices • AWS • Maven
Available for opportunities in Norway 🇳🇴
12+
Years Experience
1M+
Transactions / Day
24/7
Production Support
50+
Enterprise Releases
About Me
Senior Backend Engineer
I am a Senior Backend Engineer with 12+ years of experience building scalable enterprise applications, payment platforms, and distributed systems.
Currently working on real-time payment systems processing millions of transactions while focusing on reliability, automation, observability and performance.
My expertise includes Java, Spring Boot, Microservices, AWS, CI/CD automation, DevOps practices and production support.
Career Highlights
12+ Years Experience
Building enterprise backend systems using Java, Spring Boot and Microservices.
High-Scale Payment Systems
Contributed to Mastercard's real-time payment platform processing nearly 1M transactions per day.
Backend Engineering
Designing REST APIs, microservices and distributed systems with Java & Spring Boot.
DevOps & Automation
Built CI/CD pipelines, deployment automation and production observability using Jenkins, Splunk, Dynatrace and Chef.
Based in Oslo
Open to Senior Backend, Platform and DevOps Engineering opportunities.
Always Learning
Currently building AI-powered applications while continuously improving backend architecture and cloud skills.
Experience
2018 - Present
Senior Software Engineer
Mastercard Payment Platform
- Developed Java 8/11 Spring Boot microservices for real-time payment processing systems
- Designed REST APIs and backend services using Spring Boot, Hibernate and JPA
- Implemented asynchronous processing using ActiveMQ messaging queues
- Improved system reliability through performance optimization and production troubleshooting
- Participated in Agile development, code reviews and mentoring junior engineers
2017 - 2018
Senior Software Engineer
Newt Global
- Developed enterprise applications using Java, Spring Boot and Hibernate
- Designed REST APIs and database integrations
- Implemented backend business logic and application enhancements
Technical Skills
Featured Projects
Career Agent AI
AI-powered career assistant that finds matching jobs, analyzes opportunities, and helps manage the job search workflow.
LeetCode Java Solutions
Collection of optimized Java solutions covering algorithms, data structures, and coding interview patterns.
Developer Portfolio
Modern personal portfolio built with Next.js showcasing my experience, projects, and technical skills.
Contact Me
Have an idea? Let's build it. Or let's talk tech over a coffee—or a beer. Skål! 🍺