**SWAP is a next-generation fintech platform transforming how people and businesses move, manage, and spend money. Operating from The Gambia, SWAP is building a secure, scalable digital financial ecosystem that makes financial services more accessible across Africa and international markets.
Our platform enables users and businesses to access digital wallets, peer-to-peer transfers, cross-border remittances, bill payments, airtime top-ups, merchant payments, and agent-based financial services.
At SWAP, we are building the infrastructure to simplify everyday financial transactions and connect people, businesses, and markets through innovative digital payment solutions.
Role Description
We are looking for an experienced Backend Developer specializing in Java and Spring Boot to join our engineering team and help build, scale, and maintain SWAP’s fintech infrastructure.
You will be responsible for designing, developing, testing, and maintaining secure, high-performance backend services and RESTful APIs that power our digital wallet, payment processing, money transfers, and financial integrations.
Working closely with frontend developers, mobile engineers, product managers, QA engineers, and other stakeholders, you will help deliver reliable financial products while maintaining high standards of security, data integrity, and system performance.
This role requires a strong understanding of backend architecture, database design, API development, and the challenges of building secure, transaction-driven financial applications.
Key Responsibilities
Design, develop, and maintain backend microservices using Java and Spring Boot.
Build and maintain secure, scalable RESTful APIs for SWAP’s mobile applications, agent platform, and merchant payment services.
Implement core financial functionalities, including wallet balances, deposits, withdrawals, peer-to-peer transfers, transaction processing, and payment workflows.
Develop and maintain integrations with banks, mobile money operators, payment gateways, bill payment providers, and international remittance partners.
Ensure transaction accuracy, data consistency, idempotency, and reliable handling of failed, pending, and reversed transactions.
Design and optimize PostgreSQL databases, queries, schemas, and transaction management processes.
Use Redis for caching and other suitable performance and data-access use cases.
Implement secure authentication, authorization, role-based access control, and protection of sensitive financial data.
Apply appropriate controls for transaction reconciliation, audit trails, error handling, and monitoring.
Deploy and maintain backend services in AWS environments using Docker and Kubernetes.
Write clean, maintainable, well-documented code and participate in code reviews, testing, debugging, and production support.
Collaborate with the engineering team to improve system architecture, performance, scalability, availability, and development workflows.
Follow secure software development practices and contribute to the reliability of SWAP’s financial services.
Qualifications and Requirements
Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
Strong proficiency in Java and object-oriented programming principles.
Hands-on experience with Spring Boot, Spring Framework, and building RESTful APIs.
Practical experience designing or maintaining microservices-based architectures.
Strong knowledge of relational databases, particularly PostgreSQL, including SQL, indexing, query optimization, and transaction management.
Experience with Redis or other caching technologies.
Solid understanding of API security, authentication, authorization, encryption, and secure handling of sensitive data.
Familiarity with distributed systems, concurrency, error handling, and data consistency.
Experience with Git, automated testing, debugging, and collaborative software development workflows.
Familiarity with AWS, Docker, Kubernetes, CI/CD pipelines, and production monitoring.
Strong problem-solving skills, attention to detail, and the ability to work independently in a remote team.
Preferred Qualifications
Experience working in fintech, digital banking, mobile money, payment processing, or digital wallet platforms.
Experience integrating with third-party payment gateways, banks, mobile money APIs, or remittance providers.
Understanding of financial transaction lifecycles, settlement, reconciliation, ledger systems, and idempotent payment processing.
Experience with asynchronous messaging systems, event-driven architecture, or distributed transaction patterns.
Familiarity with financial compliance requirements, audit logging, and secure software development practices.
What We Offer
The opportunity to build and scale real-world fintech infrastructure serving African and international markets.
A collaborative, innovative, and technology-driven working environment.
Meaningful ownership of backend systems and technical decisions.
The opportunity to contribute to products that improve access to digital financial services.**
