Onyekachukwu Chukwuka
Onyekachukwu Chukwuka

Lead Software Engineer and Solutions Architect

Open to offers · Member since 18 Oct 2026
Location
United Kingdom
Desired salary
Unspecified
Work preference
Hybrid / Full Time, Contract, Freelance
Experience level
Lead

About

Professional summary

I am a Lead Software Engineer and AWS Certified Solutions Architect with more than nine years of experience designing and delivering secure distributed systems. My work spans banking, payments, biometric identity, enterprise SaaS, cloud platforms, and applied AI.

I specialise in Java and Spring Boot engineering, microservices, event-driven architecture, API design, and solution architecture. I translate complex business and legacy-system requirements into reliable, secure, maintainable modern services.

In regulated banking environments, I lead technical design and hands-on delivery for Open Banking, payments, fraud controls, transaction processing, security remediation, and platform modernisation. I have experience integrating modern Java services with COBOL, SOA, IBM mainframe, and DB2-backed platforms.

I am also a technical founder and principal solutions architect at Dexspace Ltd, where I build AI- and trust-oriented products from concept through deployment and operations. My work includes AI decision intelligence, communication coaching, identity verification, KYC/AML workflows, and consumer product development.

I bring strong cloud and platform engineering capability across AWS, Docker, Kubernetes, Terraform, CI/CD, observability, and production support. I enjoy mentoring engineers, improving engineering standards, and building resilient systems that handle sensitive data and high transaction volumes.

Skills

54 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Lead Engineer TSB Bank

I lead solution design and hands-on engineering delivery for regulated banking services, including Open Banking, payments, fraud controls, transaction processing, security remediation, and platform modernisation.

I architect Java and Spring Boot APIs integrating modern microservices with COBOL/SOA, IBM mainframe, and DB2 platforms. I have built Kafka-based fraud-alerting services using Docker, Kubernetes, and Istio; supported services processing over 10,000 transactions per hour at 99.9% uptime; contributed to loan pre-approval data pipelines; and delivered resilience, AWS Lambda, vulnerability remediation, and zero-downtime Oracle WCS to Adobe AEM migration work.

Technical Founder and Principal Solutions Architect Dexspace Ltd

I founded Dexspace Ltd and own product, solution, and cloud architecture from concept through implementation, deployment, security, observability, and operational support.

I built The Council, a Java-first AI decision-intelligence platform with specialist AI advisors, peer review, authentication, billing, quotas, persistence, and AWS deployment. I also built Impromptu, an audio-first AI communication coach, and am architecting Runam, a trust and project-funding platform with KYC/AML and verification workflows; I also delivered TheSongApp music-discovery product.

Software Engineer - Independent Contractor Andela

I designed and delivered secure payment and transaction-processing services for fintech and enterprise engagements using Java, Spring Boot, REST APIs, microservices, and relational databases.

I worked in distributed engineering teams and mentored other engineers through code review, pairing, technical guidance, and practical software engineering standards.

Software Engineer Measurabl (via Andela)

I developed Java and Spring Boot services alongside Angular and TypeScript features for a U.S. enterprise sustainability platform used by global real-estate organisations.

I worked with Kafka, Docker, Kubernetes, Elasticsearch, Redis, AWS, SQL, Metabase, and platform internationalisation. I expanded BDD and automated testing practices, increasing relevant code coverage to 97% and reducing regression risk.

Backend Team Leader Hardcore Biometric Systems

I progressed from backend engineer to team leader on a nationwide biometric enrolment and verification platform used by the Nigerian Police Force and supporting millions of sensitive identity records.

I translated high-level architecture into Java and Spring microservices, data models, integration flows, deployment patterns, and secure processing pipelines. I led improvements to CI/CD, automated testing, code review, release practices, and mentoring while supporting fingerprint, facial, and iris workflows.

Backend Engineer Star Sapphire

I built resilient Java microservices using Netflix OSS patterns for service discovery, client-side load balancing, circuit breaking, and distributed tracing.

I designed multi-tenant e-learning functionality and secure payment-gateway workflows covering training, licensing, subscriptions, and user management.

C# Developer Savannah Health Innovations

I developed C#, Entity Framework, REST API, and relational-database capabilities for clinical and administrative healthcare workflows.

I integrated third-party healthcare services and supported secure handling of sensitive patient and operational information.

Freelance Software Developer Upwork

I have delivered backend systems through selected freelance engagements in agricultural monitoring, telecommunications number management, and logistics.

My work has used Spring Boot, PostgreSQL, microservices, location-aware matching, tracking, and payment capabilities to support client-specific products and operational workflows.

Education

Learning history

Bournemouth University

MSc, Data Science and Artificial Intelligence

Graduated with Merit in Data Science and Artificial Intelligence.

University of Benin

BEng, Petroleum Engineering

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