Kessena Agberia
Summary
Software Engineer with over 4 years of experience building, designing scalable API’s and distributed systems across Saas, E-commerce, and Fintech domains. I have a strong background in C#, Typescript, Nodejs, .Net, SQL & NOSQL Databases, and clean Architecture. Experienced in payment integration, multi-tenant systems, real-time communication, and event driven architectures. I thrive in collaborative environments and excel at delivering innovative, reliable, and high-performance solutions.
Overview
1
1
Language
1
1
Certification
5
5
years of post-secondary education
3
3
years of professional experience
Work history
Backend / Mobile App Engineer
U&C Micro-Finance Bank
2025.12 - Current
- Revamped core banking application architecture to event-driven and microservice architecture, enhancing scalability and reducing deployment time by 11%.
- Built backend systems for financial transaction processing using ASP.NET Core.
- Designed secure APIs for customer and loan management systems.
- Developed custom-made APIs to facilitate smooth interaction between different software components within the app ecosystem.
- Implemented database models for financial data using EF Core and SQL Server.
- Led optimisation drive on wallet system, improving performance by 14% for school fees payment management.
- Optimised code to improve system performance, enhancing user experience.
- Managed source codes using version control tools, ensuring easy tracking and revisions.
- Mentored junior developers on coding practices-boosted team competency level.
- Generated financial and performance reports for management.
- Conducted thorough testing of mobile applications before deployment, reducing post-release bugs significantly.
- Worked closely with designers to create visually appealing mobile applications.
- Ensured high-quality user interfaces, enhancing overall app performance.
Backend Engineer
Estate Sync
Port Harcourt, Nigeria
2025.01 - Current
- Developed multi-tenant architecture supporting multiple estates with isolated data, enhancing scalability and resource efficiency.
- Optimised database efficiency for improved data retrieval times.
- Integrated third-party APIs into existing systems, expanding feature sets without extensive development time.
- Applied Clean Architecture and Domain-Driven Design principles to ensure modularity and testability.
- Improved site performance by identifying bottlenecks in code execution and implementing solutions.
- Streamlined existing code with refined logic and simplified functions.
- Resolved critical system issues promptly, reducing downtime significantly.
- Collaborated with front-end developers to align backend services with user interface, improving overall project cohesion.
- Updated legacy systems to modern standards, increasing functionality, usability, and overall user experience.
- Built invite-based user registration, authentication, and role assignment system resulting in 20% increase in registration.
- Adapted quickly to new programming languages and frameworks, demonstrating flexibility and a commitment to continual learning.
Software Engineer II
Estate Sync – Property Management SaaS
2023.06 - 2025.11
- Integrated payment and third-party APIs with idempotency and webhook handling, reducing payment failures and improving transaction reliability.
- Refactored and optimized payment workflows, increasing successful transactions by 20% and reducing checkout abandonment.
- Collaborated with multiple teams to design and implement backend solutions, enhancing system performance and user experience.
- Engineered and launched critical features for the Estate Sync app, utilizing clean architecture and domain-driven design principles to expand financial service accessibility and establish the company's online presence.
- Contributed to full Software Development Life Cycle (SDLC) by designing system architecture and testing implementation.
- Implemented testing and debugging protocols to ensure reliability and seamless operation across platforms.
Junior Backend Developer
Mars Software
Lagos
2023.05 - 2025.05
- Designed and developed custom software solutions for clients across various industries using Node.js, Nextjs and TypeScript, ensuring efficient functionality and scalability.
- Developed robust APIs to facilitate seamless web service interaction, improving overall system integration.
- Maintained high-quality coding standards, enhancing overall product resilience and reliability.
- Improved site performance by identifying and resolving bottlenecks in code execution, leading to faster load times.
- Resolved critical system issues promptly, reducing downtime significantly.
- Collaborated with stakeholders to translate requirements into user-centric solutions, resulting in enhanced client satisfaction.
- Collaborated closely with front-end developers, enhancing overall project cohesion.
- Adapted quickly to new programming languages and frameworks, demonstrating flexibility and a commitment to continual learning.
Backend Engineer
Mars Softwares
Lagos, nigeria
2024.03 - 2024.12
- Collaborated with cross-functional teams to design and implement efficient backend solutions,resulting in improved system performance and user experience.
- Optimised existing solutions, resulting in 20% increase in system performance and scalability.
- Spearheaded development and maintenance of Lasepa's core features to facilitate tax payments across Lagos state, enhancing user accessibility.
- Leveraged TypeScript/JavaScript and the MERN stack and .NET to create robust and high-performing Full Stack applications.
- Modernized Afritickets project by migrating it from deprecated frameworks to the latest.
- technologies, significantly reducing maintenance costs and improving functionality.
- Implemented rigorous testing and debugging protocols, ensuring seamless operation and high reliability across all platforms.Software Engineer/Tutor
Education
Bachelor of Engineering - Mechanical Engineering
University of Port Harcourt
2016.02 - 2021.02
Skills
- Programming Languages: C#, JavaScript, TypeScript, C
- Mobile App: React Native
- Backend: NET, NodeJs, Expressjs,NextJs
- Database and Management: MongoDB, PostgreSQL, MySQL, Entity Framework Core, SqlServer, TypeOrm,Prisma, Redis
- Architectures: Clean Architecture, DDD, Rest APIs, Event Driven Systems
- Messaging and Realtime: Kafka, BullMQ, Socketio, RabbitMQ
- Tools & Technologies: Docker, Git, Github, Gitlab
- Soft Skills: Problem-solving and analytical skills, Team collaboration, Mentoring
Languages
English
Elementary
Affiliations
- Football
- Swimming
- Video Games
- Technologies
Certification
The Complete 2023 Web Development Bootcamp - Angela Yu (Udemy)
References
Available upon request.
Timeline
Backend / Mobile App Engineer
U&C Micro-Finance Bank
2025.12 - Current
Backend Engineer
Estate Sync
2025.01 - Current
Backend Engineer
Mars Softwares
2024.03 - 2024.12
Software Engineer II
Estate Sync – Property Management SaaS
2023.06 - 2025.11
Junior Backend Developer
Mars Software
2023.05 - 2025.05
Bachelor of Engineering - Mechanical Engineering
University of Port Harcourt
2016.02 - 2021.02