Marsden Lwero

Full Stack Engineer with 3+ years of hands-on experience building corporate information systems for the financial services sector, from database schema through to production deployment. Proven track record delivering a live fintech lending and savings platform (Eguna Capital) end-to-end using Spring Boot, Kotlin, and Angular, including secure payment integration, RESTful API design, role-based access control, and system security controls. Experienced working in formal Agile/Scrum environments, writing system documentation, and training end users on production systems.

Currently leading a 5-person development team while contributing to a GraphQL-based institutional management system for a government agency. Strong analytical and problem-solving skills, solid grounding in SQL database fundamentals, and a track record of resolving system issues and communicating technical solutions clearly to non-technical stakeholders. Seeking to bring proven full-stack delivery and banking-sector fintech experience to the Full Stack Engineer role within Co-operative Bank's Youth Financial Services team.

Full Stack Software Developer (Contract) - Kenya Revenue Authority (KRA) - Kenya

(2026-01)

KESRA Institutional Student Management System (ISMS) | Full-time

• Developed and tested a GraphQL ReviewController handling institutional student admission review actions (Recommend, Recommend for Review, Approve, Decline) with role-based access control, securing system functions in line with organizational access requirements.
• Refactored ApplicationController and ReviewController to remove redundant logic, improving code maintainability and reducing duplication across the review workflow — building reusable code for future use.
• Diagnosed and resolved document-fetching bugs and production issues; built new file view and download endpoints to improve admissions officer workflow.
• Authored and executed extensive Postman test suites covering GraphQL queries and mutations, supporting SIT/UAT validation of API correctness before features were released to the live system.
• Collaborated within a Spring Boot, Kotlin, and GraphQL stack under a formal Agile/Scrum process, participating in sprint planning and implementing user stories with cross-functional team members.
• Maintained technical documentation on system configuration and API behavior to support ongoing development and knowledge transfer.

Lead Developer - Eguna Capital Limited - Kenya

(2025-07)

Part-time

• Lead a cross-functional team of 5 developers in an Agile/Scrum environment, running sprint planning and standups to deliver features for a production fintech lending and savings platform serving 90+ active members.
• Directed system and workflow optimizations that drove a measurable increase in loan volume processing throughput, contributing to the organization's competitive differentiation.
• Own architecture and technical decision-making across the Spring Boot 3.x/Kotlin backend, Angular 20 frontend, and PostgreSQL data layer, applying RESTful API design principles throughout.
• Manage production deployment and infrastructure on a DigitalOcean droplet with Nginx, SSL (Certbot), and systemd-managed services, coordinating changes through structured change control procedures.
• Attend to and resolve system failures on the live platform, coordinating fixes with the wider team to minimize downtime.
• Mentor team members on Kotlin, Spring Boot, and Angular best practices, and conduct code reviews to maintain quality standards.

Full Stack Developer - Eguna Capital Limited - Kenya

(2023-03 - 2025-06)

Full-time

• Built a production-grade fintech/banking-adjacent system from the ground up, covering company onboarding, member registration, and full loan lifecycle management (application, approval, disbursement, and reducing-balance repayment).
• Gathered and analyzed user requirements to prepare system specifications, translating business needs into technical solutions for loan and savings workflows.
• Integrated M-Pesa STK Push payments via Tuma Payment Solutions, enabling real-time mobile money transactions for loan repayments and deposits.
• Designed and implemented the Bonanza Fortune Savings Scheme, including automated monthly interest calculation and posting.
• Built automated PDF generation (iText html2pdf) for certificates, membership cards, receipts, and account statements.
• Implemented email automation (Brevo/Namecheap) and scheduled monthly jobs for recurring platform processes.
• Built server-side pagination and role-based JWT authentication, securing system access and restricting program functions by user role in line with organizational security requirements.
• Wrote system documentation and configuration guides, and trained end users and staff on new features to support platform adoption.
• Deployed and maintained the platform (Spring Boot JAR + systemd) on a DigitalOcean Managed Database and Droplet with a custom domain and SSL, achieving reliable production uptime.

ICT Officer Student Intern - Kenya Medical Research Institute (KEMRI) - Kenya

(2023-01 - 2023-03)

Internship

• Provided IT support and troubleshooting for staff hardware, software, and network issues across the department.
• Assisted with routine system maintenance, user account administration, and technical documentation.
• Gained hands-on exposure to enterprise IT operations and support processes in a research institution setting.

BSc. - Computer Science - Kenyatta University (2024)