Open to opportunities

Oserumense ISESELE

@oserumenseisesele

Message

Senior .NET software engineer delivering scalable backend systems and measurable performance improvements.

Nigeria

Message

What I'm looking for

I seek backend or cloud-focused roles where I can modernize systems, drive microservice migrations, improve performance, and work in collaborative, growth-oriented teams.

I am a resourceful senior software engineer with over five years of experience building and modernizing web-based, client-server and N-tier applications using .NET, C#, Java and cloud technologies. I have a verifiable track record of driving initiatives to completion—reducing bugs, clearing backlogs, upgrading core apps, and delivering sole-developed features that increased user engagement.

I excel in migrating monoliths to microservices, implementing event streaming with Kafka, optimizing databases and search with MongoDB and ElasticSearch, and applying TDD and CI/CD practices on Azure and AWS. I produce clear technical documentation, improve system performance, and collaborate effectively across cross-functional teams to deliver reliable, maintainable solutions.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Castille

Jul 2024 - Present (1 year 11 months)

Worked on .NET, C#, and Java applications; reduced bugs by 45% and cleared 80% of a microservice backlog while solely developing the Family & Friends project that increased user patronage by 10%. Upgraded core apps from .NET 5 to .NET 8 and developed Java APIs for Salesforce integration.

C .NET 8+Spring Boot API Development Regression Testing Microservices Salesforce Integration

Software Engineer

Secured Records Management Solutions Ltd

Aug 2023 - Jul 2024 (11 months)

Led migration from ASP.NET to .NET Core to support 20,000 RPM, integrated MongoDB and ElasticSearch improving search response times by 25%, and reduced code redundancy 30% through refactoring to .NET 7/8 with Entity Framework.

ASP.NET .NET Core Kafka MongoDB Elasticsearch Entity Framework TDD AWS EC2 S3

Software Engineer

Akiddie

Jul 2019 - Jul 2023 (4 years)

Collaborated in a 12-engineer team to decouple a monolith into microservices using Azure, designed backend APIs with ASP.NET MVC (.NET 6), optimized SQL stored procedures, and implemented background processing to increase job success rate by 40%.

ASP.NET MVC Azure SQL Server Stored Procedures Redis Microservices

Education

Degrees, certifications, and relevant coursework

Covenant University

Bachelor's Degree (Hons), Computer Engineering

Grade: 4.13/5.0 (82.5%)

Activities and societies: Testing: Manual testing, unit testing, regression testing; Tools: NUnit, MSTest, xUnit; Technical writing and system design documentation.

Bachelor's Degree (Hons) in Computer Engineering with a GPA of 4.13/5.0 (82.5%).