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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

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.

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.

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.

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.

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.

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.