Ebenezer Sam-Oladapo

Senior Backend Engineer | C# .NET | Distributed Systems | Financial Technology

Lagos, Nigeriamrsamoladapo@gmail.com+2348060373055GitHubBlog

Summary

Senior Backend Engineer with 5+ years of experience designing and building enterprise-grade financial systems, transaction processing platforms, workflow automation solutions, and distributed applications using C#, .NET, SQL Server, PostgreSQL, Azure, and AWS. Proven track record delivering business-critical banking platforms supporting investments, funds transfers, payment processing, approval workflows, and system integrations at scale. Experienced in API design, microservices architecture, cloud-native development, observability, and high-availability backend systems.

Experience

Backend Engineer · Access Bank

Mar 2022 — Present

Lagos, Nigeria

Design and develop enterprise financial platforms supporting investment processing, funds transfers, payment operations, workflow automation, and banking integrations across one of Africa's largest financial institutions.
Led backend development of a bank-wide digital investment platform for term deposit booking and lifecycle management.
Designed and implemented APIs, approval workflows, authorization processes, settlement services, and investment processing modules using C# and .NET.
Automated manual investment operations, significantly reducing processing time and operational friction.
Delivered a scalable platform supporting investment creation, approval routing, maturity processing, and transaction tracking.
Built and maintained core backend services supporting RTGS and NIP transaction processing across bank branches.
Developed maker-checker authorization workflows, approval hierarchies, routing engines, and exception management services.
Implemented secure integrations with internal banking systems and external payment infrastructure.
Improved transaction processing efficiency through automation and workflow orchestration.
Contributed to migration initiatives from monolithic applications to microservice-based architectures.
Improved deployment efficiency and maintainability through modular service design and cloud-native engineering practices.
Developed integrations with internal banking systems and external financial service providers.
Reduced settlement turnaround times and improved reliability of payment processing services.
Implemented observability solutions using OpenTelemetry, Prometheus, Grafana, and centralized logging.
Participated in code reviews, debugging, testing, and production issue resolution for business-critical systems.
Contributed to CI/CD improvements, deployment automation, and engineering best practices.
Worked extensively with Git-based workflows, repository management, and collaborative software development processes.

Software Engineer · CWG Plc

Feb 2021 — Jan 2022

Lagos, Nigeria

Delivered enterprise software solutions supporting payment operations, merchant services, and cloud-based communication platforms.
Built a transaction monitoring platform supporting over 5,000 merchant terminals, improving visibility into transaction performance and operational anomalies.
Designed and implemented a high-volume email delivery platform capable of processing over 10 million emails daily using AWS services.
Developed scalable cloud-native applications using containerized infrastructure and modern deployment practices.
Collaborated with business stakeholders to translate operational requirements into production-ready technology solutions.

Education

B.Eng. Electrical & Electronics Engineering · University of Benin

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Skills

C# · .NET 6/7/8 · ASP.NET Core · Web API · Entity Framework Core · LINQ · Microservices · REST APIs · gRPC · Event-Driven Architecture · Workflow Automation · Distributed Systems · Prometheus · Grafana · Loki · OpenTelemetry · SQL Server · PostgreSQL · MySQL · Redis · Cassandra · Docker · Kubernetes · Helm · AWS (EC2, SQS, Lambda) · Azure · xUnit · Integration Testing · Postman · JMeter

Projects

Crypto Trade Exchange

github.com/mrsamoladapo

Built a real-time cryptocurrency trading platform using SQLx, PostgreSQL, and Redis. Developed asynchronous backend services handling order placement, wallet management, market data processing, and transaction workflows. Implemented concurrent processing workflows using Tokio to support high-throughput transaction execution. Designed REST APIs and WebSocket services for real-time market updates and order tracking. Implemented structured logging, distributed tracing, and observability using Tracing, OpenTelemetry, Prometheus, and Grafana. Containerized services using Docker to simplify local development and deployment workflows. Wrote automated tests covering API endpoints, business logic, and database interactions.