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Backend Engineer — Java
Job Location:
Salary:
Experience Required:
Posted:
30 September 2026 (2 days ago)
Posted:
Application Deadline:
28 December 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
Job Summary
Kolomoni Microfinance Institution (Gambia) is a CBG-licensed microfinance institution serving customers across The Gambia. We are recruiting a Backend Engineer to build and maintain the services our products run on.
THE ROLE
You will design develop test deploy and maintain secure scalable backend applications the business logic APIs integrations and data processing behind our customer-facing products. The work is judged on what survives production: correctness under load safety under failure and code the next engineer can maintain. You will report to the Chief Technology Officer.
WHAT YOU WILL DO
- Design and develop secure scalable maintainable APIs and application business logic in Java.
- Design database structures and data-access components and optimise application and database interactions.
- Apply transaction and concurrency management and idempotency where an operation must not run twice.
- Build applications that handle retries duplicate requests and partial failures safely.
- Implement authentication authorisation and application-security controls and protect sensitive data in transit at rest and in logs.
- Develop logging monitoring and audit capability sufficient to reconstruct an incident.
- Write and maintain automated tests participate in peer review and resolve production defects.
Requirements
WHAT WE ARE LOOKING FOR
- Substantial hands-on experience building and maintaining production backend services in Java.
- Spring Boot or an equivalent framework relational databases and SQL and REST API design.
- Understanding of asynchronous and event-driven architecture caching and application security.
- Git automated testing containerisation and modern deployment.
- A first degree in computer science engineering or a related discipline or demonstrable equivalent experience.
- Experience in financial services or payments where correctness under failure matters more than speed of delivery is an advantage.
