# John Austine Osumba

> Software Engineer - React, TypeScript & Next.js | Workflow, AI Automation

Location: New York, New York, United States
Profile: https://flows.cv/johnaustineosumba

I'm a Software Engineer with 5+ Years Experince in TypeScript, React, and Next.js ecosystem; building and shipping product-driven, customer-facing systems at startup scale. Proven end-to-end ownership across full-stack architecture, real-time systems, AI integrations, frontend performance, and backend API design.

## Work Experience
### Software Engineer @ Vaultmont Wealth Lab
Jan 2025 – Present
-Architected and delivered a full-stack financial markets and trading education platform from the ground up, owning all system design decisions end-to-end across data modelling, API contracts, and frontend implementation.
-Implemented Google OAuth 2.0 authentication and secure session management with role-based access control across multiple user tiers.
-Built dual payment infrastructure integrating Paystack API and cryptocurrency payment gateways, enabling multi-currency transaction processing.
-Delivered a real-time investor monitoring dashboard providing stakeholders with live visibility into platform activity, user metrics, and financial transactions.
-Shipped the corporate website with performance optimisation, SEO best practices, and fully responsive design across all devices.

### Software Engineer @ AVRelated
Jan 2023 – Jan 2025
-Designed and delivered end-to-end full-stack web applications using TypeScript, React, Node.js, Express, and PostgreSQL in live production environments.
-Built and maintained secure REST APIs supporting authentication, authorization, and transactional workflows for a blockchain-based humanitarian aid platform.
-Implemented scalable backend services and asynchronous background jobs for high-volume data processing across international operations.
-Integrated mobile money payment systems and optimised API workflows supporting healthcare-aligned user needs and accessibility standards.
-Reduced manual processing time by 40%+ through targeted automation; improved feature delivery velocity by standardising backend and frontend patterns.
-Mentored team members on engineering best practices and contributed to architectural decisions focused on long-term maintainability.

### Full Stack Engineer @ PHYNIX SOLUTIONS
Jan 2021 – Jan 2023
-Developed and maintained responsive, component-based fintech dashboards using React, JavaScript (ES6+), and modern UI frameworks.
-Built and integrated RESTful APIs using Node.js supporting internal tooling and client-facing financial applications.
-Increased user engagement by 40% through performance optimisation, SEO improvements, and clean component architecture.
-Supported CI/CD pipeline configuration and managed cloud deployments on AWS throughout the full delivery lifecycle.

### UI/UX Designer @ Dlight
Jan 2021 – Jan 2022 | Nairobi
Spearheaded a team of talented graphic and UX designers to develop two innovative applications, focusing on creating seamless user experiences and enhancing customer engagement.
Designed and launched an intuitive e-commerce platform for D.light's products, improving product discoverability and simplifying the purchasing process for users.
Developed a streamlined consignment booking and load tracking system, which optimized logistics efficiency and user interaction through an intuitive interface.
Conducted user research, wireframing, prototyping, and usability testing to ensure a user-centered approach in both applications.
Key Skills:

User Research & Usability Testing
Wireframing & Prototyping (Figma, Adobe XD, Sketch)
Interaction Design & Visual Design
User-Centered Design & Design Thinking
Project Management & Team Leadership
Responsive & Accessible Design

### AI Research Intern, Data Annotator @ Masakhane
Jan 2021 – Jan 2021 | Nairobi, Kenya

### Teaching Assistant @ Ashinaga
Jan 2020 – Jan 2020 | Kampala, Uganda

### Social Media Manager @ Volkswagen Mobility Solutions Rwanda
Jan 2019 – Jan 2019 | Rwanda

### Assembly Graphics Designer @ The African Leadership University
Jan 2018 – Jan 2019 | Kigali City, Rwanda
I worked with African Leadership University's Assembly Department as a creative and graphic designer.
During my time; I was in charge of making visual production of any kind for a monthly event dubbed 'assembly'
My greatest achievement in this role was to develop an augment reality kind of a news segment that educates members of the community on what is happening in Africa and beyond


## Education
### Bachelor's degree in Computer Science
The African Leadership University


## Contact & Social
- LinkedIn: https://linkedin.com/in/john-austine-osumba-689327207
- Website: https://osumbaportfolio.vercel.app/

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Source: https://flows.cv/johnaustineosumba
JSON Resume: https://flows.cv/johnaustineosumba/resume.json
Last updated: 2026-04-05