Open to opportunities

Joshua Olawuyi

@joshuaolawuyi

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Senior back-end engineer delivering scalable cloud-native Java microservices.

Portugal

Message

What I'm looking for

I seek senior engineering roles focused on building scalable, cloud-native backend systems, collaborative teams, mentorship opportunities, and projects that leverage AI and modern AWS tooling.

I am a seasoned senior back-end engineer with over 5 years of experience building scalable, cloud-native solutions across enterprise, automotive, and fin-tech domains. I specialize in Java-based microservices, RESTful API design, event-driven architectures, JVM performance tuning, and AWS infrastructure (CDK, Fargate, Lambda, SQS/SNS), and I actively explore AI integrations like Spring AI with vector databases.

I have led and contributed to greenfield and modernization projects—reducing cloud costs, improving observability, and increasing test coverage—while mentoring teams and collaborating cross-functionally to deliver robust, maintainable systems. I seek impactful engineering roles where innovation meets scale and practical outcomes are prioritized.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Volkswagen

Dec 2024 - Present (1 year 1 month)

Leading greenfield development of AWS-based microservices for Volkswagen's fleet charging infrastructure, implemented real-time message routing and cost-saving Lambdas to reduce Fargate costs by 13%, and introduced a RAG system using Spring AI with a PostgreSQL vector DB.

Java 21+AWS CDK Fargate SQS SNS PostgreSQL CI CD

Software Engineer

Critical TechWorks

Mar 2024 - Nov 2024 (8 months)

Developed Spring Boot microservices for BMW's Reprocessing-as-a-Service, improved performance via non-blocking I/O and JVM tuning, and enhanced observability with Prometheus and Grafana for autonomous-driving data workflows.

Java 21+Spring Boot AWS Fargate SQS Docker PostgreSQL Prometheus Grafana

Senior Software Developer

Soft Alliance

Sep 2022 - Feb 2024 (1 year 5 months)

Led back-end engineering for enterprise fintech and CRM platforms, built event-driven features with Kafka, integrated Spring Boot and Node.js payment services, and improved CI/CD with GitLab pipelines.

Spring Boot Kafka Node CI CD Docker Spring Security PostgreSQL

Software Developer

Interswitch

Nov 2021 - Aug 2022 (9 months)

Built a reactive Spring Boot payment gateway, integrated MasterCard Auto Billing Updater, and deployed services to Kubernetes via Spinnaker while implementing Kafka messaging and Redis caching to improve performance.

Reactive Spring Kafka Kubernetes Docker Redis Spinnaker Spring MVC CI CD

Software Developer

Covenant Visions International

Jul 2016 - Nov 2021 (5 years 4 months)

Modernized pension systems by decomposing legacy monoliths into Java EE microservices, developed real-time self-service investment dashboards with Angular, and integrated REST APIs with regional banks to enable digital pension contributions.