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Hi, I’m John Austine Osumba — a Senior Full Stack Engineer, Product Designer, and UX Developer. I bring 5+ years of experience building product-driven, customer-facing systems in startup environments and real-world operations. I combine a strong product mindset with end-to-end ownership across frontend, backend, APIs, databases, security, cloud deployment, and incident handling. I enjoy collaborating with cross-functional teams to translate business requirements into production-ready software and scalable, reusable UI components.…Hi, I’m John Austine Osumba — a Senior Full Stack Engineer, Product Designer, and UX Developer. I bring 5+ years of experience building product-driven, customer-facing systems in startup environments and real-world operations. I combine a strong product mindset with end-to-end ownership across frontend, backend, APIs, databases, security, cloud deployment, and incident handling. I enjoy collaborating with cross-functional teams to translate business requirements into production-ready software and scalable, reusable UI components.

John Austine Osumba

Full Stack Developer, Product Designer, UX Designer, +2

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Hi, I’m John Austine Osumba — a Senior Full Stack Engineer, Product Designer, and UX Developer. I bring 5+ years of experience building product-driven, customer-facing systems in startup environments and real-world operations. I combine a strong product mindset with end-to-end ownership across frontend, backend, APIs, databases, security, cloud deployment, and incident handling. I enjoy collaborating with cross-functional teams to translate business requirements into production-ready software and scalable, reusable UI components.…Hi, I’m John Austine Osumba — a Senior Full Stack Engineer, Product Designer, and UX Developer. I bring 5+ years of experience building product-driven, customer-facing systems in startup environments and real-world operations. I combine a strong product mindset with end-to-end ownership across frontend, backend, APIs, databases, security, cloud deployment, and incident handling. I enjoy collaborating with cross-functional teams to translate business requirements into production-ready software and scalable, reusable UI components.

Available to hire

Hi, I’m John Austine Osumba — a Senior Full Stack Engineer, Product Designer, and UX Developer. I bring 5+ years of experience building product-driven, customer-facing systems in startup environments and real-world operations.

I combine a strong product mindset with end-to-end ownership across frontend, backend, APIs, databases, security, cloud deployment, and incident handling. I enjoy collaborating with cross-functional teams to translate business requirements into production-ready software and scalable, reusable UI components.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Head of Digital Marketing & Communication (Full-time) at Sheth Naturals

January 1, 2024 - Present

Led UI/UX redesign initiatives for an e-commerce platform; improved mobile usability and conversion rates; worked closely with developers to align front-end designs with back-end systems and workflows; mentored cross-functional teams to improve operational efficiency.

Software Engineer (Remote) at Avrello Tech

December 20, 2023 - December 20, 2025

Designed and delivered end-to-end full-stack web applications using TypeScript, React, Node.js, Express, and PostgreSQL.

Motion & Data Analyst at ICap International

March 20, 2023 - September 20, 2023

Developed interactive dashboards to visualize health care data and system workflows; translated complex data sets into usable front-end interfaces for national-level reporting tools; improved usability and efficiency through front-end optimization; worked with multidisciplinary teams to support data-driven decision-making.

UI/UX Designer (Contract) at D.Light Energy

December 20, 2021 - April 20, 2022

Designed and implemented front-end interfaces for e-commerce and consignments tracking platforms; collaborated with engineers to integrate UI components with back-end APIs; contributed to reusable design systems supporting scalable front-end development.

Full Stack Web Developer at Pynix Media UK

December 20, 2021 - April 20, 2022

Developed and maintained interactive front-end interfaces using React, JavaScript, and modern UI frameworks; built and integrated RESTful APIs using Node.js; optimized performance; increased user engagement by 40%; collaborated with designers and stakeholders; supported CI/CD and AWS deployments.

Co-founder & Lead Software Developer at Trendy Kenya Solutions

February 20, 2021 - November 20, 2022

Designed, built, and deployed full-stack web applications using modern JavaScript frameworks and backend technologies; integrated APIs and optimized system workflows for fintech and diaspora-focused platforms; implemented state management and performance improvements; evaluated and adopted new tools to improve development efficiency.