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Chika Ejiofor

@chikaejiofor

Senior Software Engineer at Rand Merchant Bank, building banking platforms processing 150K+ daily transactions.

At Rand Merchant Bank, I led development of an enterprise banking platform serving 200K+ active users and processing 150K+ daily transactions with 99.9% uptime. I also engineered Angular applications that reduced page load times by 30%.

At IZIFIN Technologies, I architected a fintech API platform supporting 50K+ concurrent users. I improved PostgreSQL query performance by 60% and helped automate AWS deployments, reducing deployment time from four hours to 15 minutes.

At Access Bank, I managed and integrated .NET microservices serving 5M+ customers. I implemented event-driven architecture and optimized database operations supporting 500K+ daily transactions.

Earlier, I developed fintech and public-service systems at NOWNOW, Longbridge Technologies (Fidelity Bank), and Complus Tech. These included a COVID-19 result authentication system, banking services, a school management portal, and a vendor management system.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Rand Merchant Bank

Mar 2024 - Present (2 years 8 months)

Led development of an enterprise banking platform serving 200K+ active users, architecting microservices backend using C# .NET 8 and Java SpringBoot processing 150K+ daily transactions with 99.9% uptime. Engineered high-performance Angular frontend applications with NgRx state management, reducing page load times by 30% and improving Core Web Vitals scores by 40%.

C#.NET 8+Java Spring Boot Angular NgRX Microservices Payment Processing PCI DSS Fraud Detection Component Libraries Mentorship

Senior Software Engineer

IZIFIN Technologies

Sep 2022 - May 2024 (1 year 8 months)

Architected and deployed scalable fintech API platform using C# ASP.NET Core 6, processing 30K+ daily API calls with average response time under 200ms and supporting 50K+ concurrent users. Designed optimized database schemas in PostgreSQL handling 1M+ transaction records, implementing indexing strategies that improved query performance by 60%.

C#ASP.NET Core PostgreSQL Indexing CI CD GitHub Actions Docker AWS EC2 RDS S3 Technical Design Coding Standards

Software Engineer

Access Bank

Oct 2021 - Sep 2022 (11 months)

Managed and integrated core banking microservices using C# .NET 5 serving 5M+ customers, implementing event-driven architecture that improved system resilience reducing latency by 30%. Optimized critical database operations across MSSQL and MySQL databases, reducing query execution time by 45%.

C#.NET 5 Microservices Event Driven Architecture MSSQL MySQL Query Optimization xUnit Testing Agile

Software Engineer

NOWNOW

Sep 2020 - Sep 2021 (1 year)

Developed robust backend services for fintech applications using C# ASP.NET Core, processing 50K+ daily financial transactions with 99.8% success rate and sub-300ms average response time. Delivered Nasarawa State Internal Revenue System and Equatorial Guinea's COVID-19 Result Authentication System.

C#ASP.NET Core Fintech Authentication Audit Logging Regulatory Compliance Scalability

Software Developer

Longbridge Technologies

Dec 2019 - May 2020 (5 months)

Engineered secure banking backend systems using C# ASP.NET Core, implementing encryption and authentication protocols that achieved zero security breaches while serving 1M+ bank customers. Optimized API performance through caching strategies and database query tuning, improving response times by 30%.

C#ASP.NET Core Encryption Authentication API Optimization Caching Database Tuning

Software Developer

Complus Tech

Jul 2018 - Nov 2019 (1 year 4 months)

Developed multi-tenant SaaS solutions using C# .NET Core serving 20+ enterprise clients, implementing role-based access control and data isolation ensuring GDPR compliance. Built comprehensive School Management Portal and Delta State Vendor Management System.

C#.NET Core SaaS Multi Tenant Environments Role Based Access Control GDPR school management Vendor Management