AN

Arinze Nnaji

Available to hire

Hi, I'm Arinze Nnaji. I'm a senior software engineer with extensive experience building scalable backend services, microservices architectures, and cloud-native deployments across Europe and Africa.

About

Hi, I’m Arinze Nnaji. I’m a senior software engineer with extensive experience building scalable backend services, microservices architectures, and cloud-native deployments across Europe and Africa. I work primarily with Java and Node.js, Docker, Kubernetes, and modern CI/CD pipelines, delivering robust software for financial services and telecoms.

I enjoy driving migrations from monoliths to microservices, designing event-driven processes, and collaborating with cross-functional teams to ship high-quality, interoperable systems. When I’m not coding, I mentor teammates and contribute to open-source initiatives.

  • 13 years' experience
  • Joined April 2026

Industry experience

  • Software & Internet
  • Financial Services
  • Telecommunications
  • Retail
  • Professional Services

More experts in Stockholm, Sweden

Work experience· 7 roles

Senior Software Engineer · CabonlineDec 2025 – Present · 1 yr

Built and maintained distributed backend services supporting large-scale taxi and mobility operations across Nordic markets. Designed and implemented event-driven workflows for order and payment processing, including automated refund handling via Swish. Integrated and versioned protobuf-based contracts, migrating from deprecated schemas to system-wide standards to improve interoperability and reduce integration failures.

Senior Software Engineer · TelenorOct 2021 – Dec 2025 · 4 yrs 3 mos

Improved concurrency in backend processing, boosting throughput and efficiency. Integrated Temporal workflows to automate complex processes. Implemented a Node.js internal client tool to aid incident resolution. Improved inventory management by optimizing data handling and API integrations.

Consultant · Sigma Consulting (at Telenor)May 2019 – Sep 2021 · 2 yrs 5 mos

Migration of old monolithic application to a microservices-based approach. Epic-based development and implementation of eSIM integration. Implemented future-term termination subscriptions on customer demise (integration with third-party API). Migrated subscriptions from old system to the new system. Implemented a validation service to mitigate order processing issues.

Senior Software Engineer · First City Monument BankJun 2018 – May 2019 · 1 yr
Software Engineer · Interswitch LimitedJun 2015 – Jun 2018 · 3 yrs 1 mo
Web and Mobile Developer · Novedad LimitedAug 2013 – Jan 2015 · 1 yr 6 mos
Web and Mobile App Intern · Terragon LimitedMar 2012 – Sep 2012 · 7 mos

Education

B.Sc. Computer Science · Covenant University2009 – 2012

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