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I’m Jomo Lumina, a Senior Full-Stack Engineer with over 10 years of experience helping companies build scalable, high-performance web and cloud solutions. My expertise spans .NET, React, Next.js, Vue, and GraphQL, along with AWS, Azure, and GCP for cloud deployment and automation. I’ve delivered projects for brands like Liberty, Toyota, and ZCCM, leading architecture overhauls that boosted performance by 40%+ and reduced deployment times by over 60%. I specialize in modernizing legacy systems, API integrations, and AI-enhanced SaaS platforms that improve efficiency and user experience. What makes me stand out is a hands-on, product-minded approach — I combine solid engineering with a focus on clean architecture, DevOps best practices, and measurable results. Whether it’s leading a team or delivering an end-to-end solution, I focus on shipping quality software that scales.…I’m Jomo Lumina, a Senior Full-Stack Engineer with over 10 years of experience helping companies build scalable, high-performance web and cloud solutions. My expertise spans .NET, React, Next.js, Vue, and GraphQL, along with AWS, Azure, and GCP for cloud deployment and automation. I’ve delivered projects for brands like Liberty, Toyota, and ZCCM, leading architecture overhauls that boosted performance by 40%+ and reduced deployment times by over 60%. I specialize in modernizing legacy systems, API integrations, and AI-enhanced SaaS platforms that improve efficiency and user experience. What makes me stand out is a hands-on, product-minded approach — I combine solid engineering with a focus on clean architecture, DevOps best practices, and measurable results. Whether it’s leading a team or delivering an end-to-end solution, I focus on shipping quality software that scales.

Jomo Lumina

AI Engineer, App Developer, Back-End Developer, +3

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I’m Jomo Lumina, a Senior Full-Stack Engineer with over 10 years of experience helping companies build scalable, high-performance web and cloud solutions. My expertise spans .NET, React, Next.js, Vue, and GraphQL, along with AWS, Azure, and GCP for cloud deployment and automation. I’ve delivered projects for brands like Liberty, Toyota, and ZCCM, leading architecture overhauls that boosted performance by 40%+ and reduced deployment times by over 60%. I specialize in modernizing legacy systems, API integrations, and AI-enhanced SaaS platforms that improve efficiency and user experience. What makes me stand out is a hands-on, product-minded approach — I combine solid engineering with a focus on clean architecture, DevOps best practices, and measurable results. Whether it’s leading a team or delivering an end-to-end solution, I focus on shipping quality software that scales.…I’m Jomo Lumina, a Senior Full-Stack Engineer with over 10 years of experience helping companies build scalable, high-performance web and cloud solutions. My expertise spans .NET, React, Next.js, Vue, and GraphQL, along with AWS, Azure, and GCP for cloud deployment and automation. I’ve delivered projects for brands like Liberty, Toyota, and ZCCM, leading architecture overhauls that boosted performance by 40%+ and reduced deployment times by over 60%. I specialize in modernizing legacy systems, API integrations, and AI-enhanced SaaS platforms that improve efficiency and user experience. What makes me stand out is a hands-on, product-minded approach — I combine solid engineering with a focus on clean architecture, DevOps best practices, and measurable results. Whether it’s leading a team or delivering an end-to-end solution, I focus on shipping quality software that scales.

Available to hire

I’m Jomo Lumina, a Senior Full-Stack Engineer with over 10 years of experience helping companies build scalable, high-performance web and cloud solutions. My expertise spans .NET, React, Next.js, Vue, and GraphQL, along with AWS, Azure, and GCP for cloud deployment and automation.

I’ve delivered projects for brands like Liberty, Toyota, and ZCCM, leading architecture overhauls that boosted performance by 40%+ and reduced deployment times by over 60%. I specialize in modernizing legacy systems, API integrations, and AI-enhanced SaaS platforms that improve efficiency and user experience.

What makes me stand out is a hands-on, product-minded approach — I combine solid engineering with a focus on clean architecture, DevOps best practices, and measurable results. Whether it’s leading a team or delivering an end-to-end solution, I focus on shipping quality software that scales.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Tonga (Tonga Islands)

Intermediate

Tswana

Intermediate

Work Experience

Google C# LLM Developer at Turing

April 30, 2025 - October 7, 2025

Trained large language models to understand, generate, and reason about C# code; crafted prompts and responses; evaluated model performance; performed prompt engineering, fine-tuning, and testing; collaborated with research and engineering teams to align with model goals.

Senior Software Developer at NetOne Technology Service Group

May 31, 2024 - October 7, 2025

Lead software development for a custom-built system digitizing procurement requisitions, employee management, and office expenditures; backend API using .NET Core and frontend using React; delivered a streamlined, scalable platform.

Systems Architect/Senior Software Developer at FullStack PTY LTD

June 30, 2023 - October 7, 2025

Designed new systems for local and cloud deployments (Azure and AWS); built Azure function apps to trigger events; defined AWS input/output configuration rules; built and maintained project pipelines.

Senior Software Engineer (Contracted to Liberty - Braamfontein) at CyberPro Consulting

May 31, 2022 - October 7, 2025

Developed and maintained 'MyLiberty' client portal for policy interactions; full-stack responsibilities using ReactJS for frontend and C# .NET Core 3 for backend; integrated with Liberty IT infrastructure.

Frontend MEAN Stack Developer at HelloComputer

September 30, 2019 - October 7, 2025

Maintained and enhanced client web apps including Toyota Genuine Parts and Automark blog using Angular and Node.js; developed responsive, SEO-friendly components; created cross-client email templates for campaigns; contributed to cross-platform mobile app with Angular and Ionic; customized Umbraco and Orchard CMS for content.

ElasticSearch and RabbitMQ Consultant at Emisha Systems

October 31, 2017 - October 7, 2025

Led Elasticsearch upgrade, installed and configured X-Pack for monitoring; integrated LDAP Active Directory; deployed Logstash to ingest messages from RabbitMQ; provided ongoing support and optimization for high availability, performance, and scalability.

Senior C# Developer (part-time) at TechSpotDEV

June 1, 2025 - Present

Advisory role on architecture and technical direction for a Laboratory Information Management System (LIMS); reviewed key design decisions; ensured .NET best practices; advised on integration with lab instruments and external systems; contributed C# code for complex components and edge cases; supported troubleshooting and performance tuning.

Google C# LLM Developer at Turing

April 30, 2025 - October 7, 2025

Senior Software Developer at NetOne Technology Service Group

May 31, 2024 - October 7, 2025

Lead software developer for a custom web-based system digitizing procurement requisitions, employee management, and office expenditures; backend using .NET Core and frontend using React; delivered end-to-end platform.

Systems Architect/Senior Software Developer at FullStack PTY LTD

June 30, 2023 - October 7, 2025

Designed new systems for local and cloud deployments (Azure and AWS); built Azure Function Apps to trigger events and AWS rules for input/output configurations; built and maintained project pipelines.

Senior Software Engineer (Contracted to Liberty) at CyberPro Consulting

September 30, 2019 - October 7, 2025

Developed and maintained 'MyLiberty' client portal for policy management; full-stack responsibilities using ReactJS and .NET Core 3; integrated with Liberty IT infrastructure; ensured robust, scalable experience.

Frontend MEAN Stack Developer at HelloComputer

September 30, 2019 - October 7, 2025

Maintained and enhanced client web apps (Toyota Genuine Parts, Automark blog); built responsive, SEO-friendly components; integrated RESTful APIs; contributed to cross-platform mobile app with Angular and Ionic; customized Umbraco and Orchard CMS for content.

ElasticSearch and RabbitMQ Consultant at Emisha Systems

October 31, 2017 - October 7, 2025

Upgraded ElasticSearch; integrated with Active Directory via LDAP; deployed and configured Logstash to ingest RabbitMQ data; provided ongoing support and optimization for the ElasticSearch cluster.

Intern at Siemens S.A./N.V. (Simatic IT)

December 31, 2014 - October 7, 2025

Designed and developed web-based and desktop applications using the .NET framework; followed an N-Tier architecture; Oracle database integration.

Software Development Intern at Unilab

December 31, 2014 - October 7, 2025

Developed a barcode/RFID scanning application for inventory management on Motorola MC9190; created a RESTful API for data synchronization; VB.NET with WCF for robust client-server communication.