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Backend engineer with 4 years of fintech experience building and scaling distributed systems on Java (Spring Boot) and Go. I’ve driven major performance improvements, reduced deployment times, and shipped core banking functionality used by thousands of active customers. I focus on high-volume backend services, event-driven architectures with Kafka, caching with Redis, and reliable CI/CD on AWS and Kubernetes. I use Claude Code and Cursor daily, which has helped me catch security issues early and improve production readiness.…Backend engineer with 4 years of fintech experience building and scaling distributed systems on Java (Spring Boot) and Go. I’ve driven major performance improvements, reduced deployment times, and shipped core banking functionality used by thousands of active customers. I focus on high-volume backend services, event-driven architectures with Kafka, caching with Redis, and reliable CI/CD on AWS and Kubernetes. I use Claude Code and Cursor daily, which has helped me catch security issues early and improve production readiness.

Chibuikem Henry Okonkwo

Back-End Developer, Social Media Manager, Full Stack Developer, +7

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Backend engineer with 4 years of fintech experience building and scaling distributed systems on Java (Spring Boot) and Go. I’ve driven major performance improvements, reduced deployment times, and shipped core banking functionality used by thousands of active customers. I focus on high-volume backend services, event-driven architectures with Kafka, caching with Redis, and reliable CI/CD on AWS and Kubernetes. I use Claude Code and Cursor daily, which has helped me catch security issues early and improve production readiness.…Backend engineer with 4 years of fintech experience building and scaling distributed systems on Java (Spring Boot) and Go. I’ve driven major performance improvements, reduced deployment times, and shipped core banking functionality used by thousands of active customers. I focus on high-volume backend services, event-driven architectures with Kafka, caching with Redis, and reliable CI/CD on AWS and Kubernetes. I use Claude Code and Cursor daily, which has helped me catch security issues early and improve production readiness.

Available to hire

Backend engineer with 4 years of fintech experience building and scaling distributed systems on Java (Spring Boot) and Go. I’ve driven major performance improvements, reduced deployment times, and shipped core banking functionality used by thousands of active customers.

I focus on high-volume backend services, event-driven architectures with Kafka, caching with Redis, and reliable CI/CD on AWS and Kubernetes. I use Claude Code and Cursor daily, which has helped me catch security issues early and improve production readiness.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

French

Intermediate

Igbo

Advanced

Javanese

Fluent

Aragonese

Advanced

Work Experience

Software Engineer at Wizer Consulting Services

April 1, 2024 - Present

Shipped the Wizer Academy platform from scratch, building backend APIs in Java Spring Boot, integrating payment providers (Paystack and Flutterwave), and implementing automated onboarding flows. Created a self-serve CMS that reduced engineering ticket requests from the content team. Built Lucid, an escrow and settlement platform in Go, including multi-party transaction management, signing workflows, RBAC, and concurrent state handling. Maintains CI/CD across 5 services on GitLab, deploys Dockerized services on AWS, and uses Prometheus/Grafana for observability. Mentors and reviews code for two engineers.

Backend Software Engineer at Wizer Consulting Services

April 1, 2024 - Present

Developed and maintained Spring Boot microservices and secure REST APIs using JWT and RSA for an e-commerce platform, supporting user registration, payments, certificates and course material access, and troubleshooting performance bottlenecks. Implemented Amazon SES email notifications, leading to a 30% increase in open rates, enhancing customer engagement. Engineered the backend of a custom CMS, empowering non-technical team members to update content across multiple websites, reducing content update time. Implemented GitLab CI/CD pipelines with AWS CodePipeline and Docker for automated builds and deployments, reducing deploy-time by 70% and minimizing release errors by 50%. Documented REST APIs using Swagger/OpenAPI, tested workflows with Postman collections, and wrote unit and integration tests to ensure high-quality delivery across clients.

Software Engineer (Part-time) at Simplify Technologies

July 1, 2023 - December 31, 2025

Built and maintained a multi-tenant core banking platform in Java Spring Boot serving 2,000+ active customers, including loan management, savings lifecycle, payment processing, and customer communications. Designed Kafka-based event pipelines across five containerized microservices for high-volume asynchronous processing. Implemented Redis caching to reduce API response time from ~400ms to ~80ms on hot-path financial endpoints. Containerized services with Docker and deployed on Kubernetes on AWS and Azure using GitLab CI/CD automation, reducing deployment time from ~30 minutes to ~5 minutes.

Backend Engineer (Part-time) at Simplify Technologies

July 1, 2023 - Present

Led the development of a multi-tenant core banking application for microfinance institutions and clients in an agile environment, built on Apache Fineract and Mifos, improving operational efficiency and scalability. Strengthened backend security using HMAC, AES encryption, and Redis for secure request validation and response integrity. Automated background processes using @Scheduled annotations and CRON expressions, enhancing task execution efficiency. Engineered a multi-tenant messaging platform integrating Chatwoot into a Fineract-based digital banking backend with tenant-aware request routing via Reactor Context, resulting in streamlined communication and improved system reliability. Implemented bulk SMS campaigns and bulk upload of contacts using Spring Batch, Redis-backed OTP and JWT blacklist flows, and message-level audit tracking. Containerized workloads with Docker and automated deployments via GitLab CI/CD, improving process efficiency and security compliance.

Freelance Software Developer at Freelance

January 1, 2022 - June 1, 2023

Conducted manual testing, identifying and resolving 95% of application issues. Delivered multiple software projects, reducing delivery time by 30% through collaboration and optimized workflows. Designed and implemented MySQL databases with robust key relationships to enhance data integrity.

Freelance Developer / Intern at Independent & Melodia

May 1, 2021 - June 30, 2023

Delivered full-cycle backend systems for multiple clients using Java, Go, Python, and JavaScript. Completed projects across development and delivery phases, improving defect detection before production and contributing to high pre-production defect prevention across engagements.

Software Developer Intern at Melodia Coding Academy

May 1, 2021 - November 1, 2021

Developed backend, frontend, and game applications using JavaScript and Spring Boot, achieving successful project completion and enhancing full-stack development skills with technologies like Git and Docker. Configured servers, deployed applications, and tested features across various platforms, reducing downtime by 15% and enhancing deployment efficiency. Improved user experience by implementing performance optimizations that led to a 25% reduction in page load times.