Sachin Gimhan
Software Engineer
Delgoda
Summary
Versatile and results-driven Software Engineer with 4+ years of hands-on experience in designing and developing secure, scalable backend systems within the fintech domain. Proven expertise in building payment integrations with Visa, MasterCard, UnionPay, and QR-based payment platforms, along with deep knowledge of ATM switches, POS systems, and HSM technologies like Thales and Safenet.
Adept in multiple programming languages including Java, GoLang, Node.js, and C++, with strong command over microservice architecture, Spring Boot, and RESTful APIs. Demonstrated ability to deliver high-performance systems using object-oriented design, test-driven development, and CI/CD pipelines on AWS.
Experienced in integrating with core banking systems such as Finacle, and building mission-critical applications that meet industry compliance standards like PA-DSS and PCI SSF. Passionate about solving complex problems, driving innovation, and delivering impactful solutions through collaboration and continuous learning.
Overview
5
5
years of professional experience
28
28
years of post-secondary education
Work History
Senior Software Engineer
Epic Lanka
01.2025 - Current
- Architected and led development of a real-time rule-based fraud management system using Java Streams and a custom rule engine to process over 100 transactions per minute with low latency.
- Guided a team of developers using agile practices, conducting regular code reviews and technical mentoring.
- Managed host-to-host ATM integrations using ISO8583 message formats, enhancing secure transaction flows.
- Collaborated directly with clients for solution delivery and change requests.
- Contributed to PCI SSF certification efforts through secure coding, compliance documentation, and audits.
- Implemented DevOps practices with CI/CD pipelines and deployment strategies using AWS.
Software Engineer
Epic Lanka
10.2022 - 01.2025
- Developed and certified Visa and Mastercard payment integrations using Java and Spring Boot, handling end-to-end communication with global payment schemes.
- Engineered RESTful APIs for mobile banking platforms using Node.js, ensuring scalability and security.
- Integrated HSM (Hardware Security Modules) for encryption key management and secure transactions.
- Built and maintained QR-based payment features like Mvisa QR, Alipay, and LankaQR using event-driven programming principles.
- Authored and enforced PA-DSS guidelines for secure application development.
- Performed code reviews, supported CI/CD pipelines, and collaborated with QA teams using test-driven development.
- Managed and optimized backend data using Oracle Database and MongoDB.
- Designed and developed scalable backend services using GoLang and Java, implementing high-performance APIs and background jobs for real-time financial transaction processing.
Associate Software Developer
Epic Lanka
10.2021 - 10.2022
- Developed Open Banking integrations using microservices architecture and REST/SOAP APIs.
- Designed scalable backend services with Spring Boot and Java, focusing on modularity and reusability.
- Built asynchronous, multi-threaded applications that communicated over Oracle Queue systems for high throughput.
- Participated in system deployments and troubleshooting with the DevOps team.
- Utilized MySQL and Oracle for data modeling and query optimization.
Internship Trainee
Epic Lanka
12.2020 - 10.2021
- Worked on socket programming and ISO8583 message handling using Java and jPOS library.
- Assisted in backend development tasks for payment processing applications.
- Gained hands-on experience with secure messaging, transaction logging, and testing practices.
- Supported senior developers with documentation and debugging of live systems.
Education
Master of Science - Computer Software Engineering
University of Westminster
Colombo, Sri Lanka 04.2001 - Current
Bachelor of Science - Computer Science Top up, Computer Software Engineering
The University of Bolton
Colombo, Sri Lanka 05.2022 - 04.2023
Graduate Diploma - Computer Software Engineering
IJSE-Institute of Software Engineering
Panadura, Sri Lanka 01.2019 - 01.2022
Skills
Problem Solving
undefinedTimeline
Senior Software Engineer
Epic Lanka
01.2025 - Current
Software Engineer
Epic Lanka
10.2022 - 01.2025
Bachelor of Science - Computer Science Top up, Computer Software Engineering
The University of Bolton
05.2022 - 04.2023
Associate Software Developer
Epic Lanka
10.2021 - 10.2022
Internship Trainee
Epic Lanka
12.2020 - 10.2021
Graduate Diploma - Computer Software Engineering
IJSE-Institute of Software Engineering
01.2019 - 01.2022
Master of Science - Computer Software Engineering
University of Westminster
04.2001 - Current
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