Open to opportunities

Xavier Kioko

@xavierkioko

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Full-stack developer focusing on backend APIs, payments integrations, and React-based apps.

Kenya

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What I'm looking for

I seek a collaborative role building backend systems and React-based web/mobile apps, focused on payments, APIs, and growth opportunities.

I am a full-stack developer passionate about building user-centric applications that simplify routines and add value. I combine backend API design, database optimization, and React/React Native front-end work to deliver end-to-end solutions.

I have led backend development for payment products, implemented C2B and B2C integrations, and maintained MySQL databases while supporting merchants through Slack, Skype, and CRM tools. I have also built Android apps with React Native and web front ends with React.js.

I thrive in collaborative environments, contribute to code reviews and testing, and prioritize continuous learning and reliable, maintainable systems that improve operational workflows and customer experiences.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Reivax Softwares Limited

Dec 2023 - Present (1 year 10 months)

Led backend development and database modeling for the iNyumba product and implemented frontend web and Android apps using React JS and React Native, improving product delivery and integrations.

React Native React PHP MySQL API Development Laravel Postman

Current

Application Support Team Lead

Current

iPay

Sep 2023 - Present (2 years 1 month)

Led application support and backend development for iPay, maintaining and optimizing MySQL databases, developing C2B/B2C APIs and payment plugins, and resolving merchant integration issues.

MySQL API Integration PHP Laravel Postman CRM Support

Backend Developer

Fintech-Group

Jan 2023 - Aug 2023 (7 months)

Maintained bank databases and enhanced a cheque-point platform handling credits and debits, participated in code reviews, automated testing, and cross-functional UI/UX integration.

MySQL Backend Development Automated Testing Code Review Git PHP

Junior Software Developer

Directorate of Criminal Investigations

Jan 2022 - May 2022 (4 months)

Supported development and optimization of internal software, collaborated with UI/UX designers, and gained proficiency in React Native and Slim Framework while documenting integrations.

React Native JavaScript Full Stack Web Development Git Debugging Documentation

Junior Software Developer

South Eastern Kenya University

Jan 2021 - May 2021 (4 months)

Assisted in web application development, server configuration and network troubleshooting, and provided first-level end-user support during internship projects.

Web Development Configuration Android Development User Support PHP

Junior Software Developer

Kitui County Referral Hospital

Feb 2020 - May 2020 (3 months)

Contributed to web application development, learned agile practices, assisted in CCTV system configuration, and supported frontend work during website installations.

Web Development Agile Methodologies CCTV Configuration Frontend Development Team Collaboration PHP

Volunteer

Kitui County Referral Hospital

Jan 2020 - Feb 2020 (1 month)

Recorded patients' vitals, assisted with stock balancing and issuance of hospital commodities to support clinical operations.

Inventory Management Clinical Support Documentation

Education

Degrees, certifications, and relevant coursework

Strathmore University

Bachelor of Science, Computer Science and Informatics

2019 - 2023

Bachelor of Science in Computer Science and Informatics completed at Strathmore University, covering full-stack development, databases, and software engineering principles.