Open to senior backend roles
Aigbedion Oghomwen
Senior Software Engineer
I build and run the backend systems that move money — Java, Spring Boot and microservices in regulated banking and payments environments.
8+
Years building backend systems in banking & payments
~60%
Latency reduction delivered on critical service paths
2×
AWS certifications — Solutions Architect & Developer
01 — About
Backend engineering where correctness is not optional
Senior Software Engineer with 8+ years of experience designing, building, deploying and supporting enterprise backend systems in regulated banking and payments environments. Strong expertise in Java, Spring Boot and microservices, with hands-on experience owning services end-to-end and leading technical design decisions.
Proven track record of improving system performance, reliability and security, with production experience deploying and operating services on AWS. Effective collaborator with architects, QA, DevOps and business stakeholders in Agile delivery environments.
- Based in Munich, Germany
- Focus Java · Spring Boot
- Domain Payments · Banking
- Cloud AWS certified ×2
- Ways of working Agile · Scrum
02 — Skills
Technical toolkit
The stack I design, build and operate with day to day — production systems, not side projects.
Backend Engineering
Security & Access Control
Messaging & Async
Data & Persistence
Cloud & Deployment
Testing & Quality
Operations & Reliability
Delivery & Practices
03 — Experience
Where I have built
Eight years across European and African payment infrastructure, owning services from design through production support.
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Senior Software Engineer (Java Backend)
Unzer Group GmbH
Unzer Group is a European payment services provider offering integrated payment solutions for online and in-store merchants.
- Design, develop, deploy and operate Java / Spring Boot microservices supporting financial reporting, reconciliation and integrations with banking and enterprise systems.
- Own backend services end-to-end — from technical design and implementation through testing coordination, deployment support and production operations.
- Lead technical design discussions and contribute architectural input to ensure alignment with enterprise security, reliability and compliance standards.
- Deploy and run backend services on AWS (EC2, S3, ECR, Secrets Manager) in collaboration with platform and DevOps teams.
- Implement secure authentication and authorization using Spring Security, OAuth2, JWT and role-based access control.
- Provide technical leadership during production incidents — impact analysis, root-cause investigation and driving timely resolution.
- Contribute to performance optimization initiatives, achieving ~60% latency reduction in critical service paths.
- Participate in code and design reviews, and maintain API specifications and operational documentation.
-
Software Engineer — Mobile Financial Services
Interswitch Group
Interswitch is a leading African digital payments and commerce company serving banks, merchants and consumers.
- Developed Java backend services powering consumer-facing mobile banking and payment applications.
- Designed and maintained RESTful APIs consumed by mobile clients and external partner systems.
- Implemented and maintained Apache Kafka consumers to integrate backend services with asynchronous processing pipelines.
- Designed and optimized SQL schemas and queries for high-volume transactional workflows.
- Collaborated with product, QA and operations teams to deliver reliable financial services.
- Supported production environments — troubleshooting issues and ensuring high service availability.
- Mentored junior engineers and regularly conducted code reviews to lift code quality and team consistency.
-
Java Developer
Lonzec Technologies
Client engagement: First City Monument Bank.
- Worked within a delivery team providing backend Java services integrated with core banking systems.
- Supported application development, maintenance, testing and documentation in a regulated banking environment.
04 — Credentials
Certifications & education
2025
AWS Certified Solutions Architect — Associate
Amazon Web Services
2024
AWS Certified Developer — Associate
Amazon Web Services
2015
B.Eng. Engineering
University of Benin
05 — Contact
Let us talk
Whether you are hiring for a senior backend role, scoping a payments integration, or want a second opinion on a service design — send a note and I will get back to you.