Ademiju Taiwo

Backend Engineer with 5+ years of experience building and scaling fintech and payment systems. Strong expertise in Java and Spring Boot with hands-on experience designing distributed microservices handling high transaction volumes. Proven track record of improving performance, system reliability, and developer experience through clean architecture, automation, and data-driven decisions. Thrives in customer-focused, data-intensive environments.

Java Backend Engineer at MTN Nigeria (2025-01 – Present)

• Design and maintain RESTful APIs powering the MTN MoMo ecosystem, processing 500,000+ daily requests.
• Improved observability and incident response through structured logging, monitoring, and alerting, reducing MTTR and MTTD.
• Collaborate with product, mobile, QA, and DevOps teams to deliver secure, regulatory-compliant solutions.
• Support CI/CD pipelines enabling frequent, safe deployments.

Backend Engineer (Remote) at Evolutics Tech (2024-01 – 2025-11)

• Built and maintained APIs serving 10,000+ daily requests with 99.9% uptime.
• Led migration from monolith to 20+ microservices, improving scalability and fault isolation by 40%.
• Implemented Redis caching and query optimizations, reducing API latency by 60% and DB read load by 45%.
• Refined API contracts and service boundaries in collaboration with cross-functional teams.

Backend Engineer, Contract (Remote) at PayEvery (2024-01 – 2024-07)

• Developed bulk transfer and scheduled payments, increasing transaction volume by 5%.
• Implemented instant settlement processing, significantly increasing payment throughput.
• Integrated third-party partner APIs to support secure financial transactions.
• Reduced service downtime by 20% through proactive debugging and developer support.

Backend Engineer (Remote) at Digicore (2023-01 – 2024-02)

• Implemented transfer limits and airtime purchase features for partner banks, driving 15% usage growth.
• Built wallet services for a biller-reseller platform using Java 17 and Spring Boot with 90%+ test coverage.
• Delivered card validation services for secure customer onboarding.

Backend Engineer at Crown Interactive (2021-01 – 2023-03)

• Enhanced a financial services platform enabling seamless buyer–seller transactions.
• Designed loan repayment scheduling, accelerating project delivery by 20%.

B.Sc. in Food Science & Technology – Obafemi Awolowo University (2014 – 2019)

Diploma in Software Engineering – Semicolon Africa (2021 – 2022)