Open to opportunities

Ayebawatari Kien-Olali

@ayebawatarikien-olali

Message

Backend Software Engineer scaling low-latency distributed systems and high-throughput platforms.

Nigeria

Message

What I'm looking for

I want to build and optimize low-latency, high-throughput backend systems—scaling microservices, hardening security workflows, and improving database performance—while tackling real-world reliability and performance challenges in production.

I’m a high-performance Backend Software Engineer with 5 years of engineering experience across .NET and Java ecosystems. I specialize in building low-latency distributed architectures, optimizing relational database query pipelines, and implementing high-throughput transaction processing systems.

In my current role at Bank 78 Microfinance Bank, I’ve supported core financial services across 15+ microservices, handling 23 million weekly transactions, and scaled automated identity verification flows (NIN/BVN integrations) to manage 6,000+ requests per minute. I also modernized slow reporting by replacing sub-optimal Entity Framework queries with high-performance stored procedures and batching, reducing execution time from 3 minutes to under 1 second per request.

Experience

Work history, roles, and key accomplishments

Current

Backend Software Engineer

Current

Bank 78 Microfinance Bank

Nov 2024 - Present (1 year 8 months)

Maintained and optimized core financial services across 15+ microservices, supporting 129k+ active customers and 23M weekly transactions. Engineered identity verification integrations, improved database query performance from ~3 minutes to under 1 second, and implemented defense-in-depth security workflows.

Distributed Systems Microservices Redis Stored Procedures Query Optimization SQL (EF Core To Stored Procedures)Database Batching Identity Verification RBAC Transaction Processing

Backend Engineer Intern

Bank 78 Microfinance Bank

Jan 2024 - Oct 2024 (9 months)

Profiled, diagnosed, and resolved latency bottlenecks in core microservice endpoints to maintain uptime during heavy asynchronous processing. Refactored legacy database schemas and optimized EF Core queries with normalization and index strategies to mitigate deadlocks.

Microservices Asynchronous EF Core Query Optimization Indexing Data Normalization Deadlock Mitigation

Software Engineer

Stringcode Limited

Mar 2021 - Jan 2024 (2 years 10 months)

Designed and shipped production-grade backend services and desktop automation tools using Java and Spring Boot. Built relational database architectures for multi-tenant applications and developed secure enterprise REST APIs integrating payment gateways and implementing RBAC.