JO

John Oluwatosin Ajayi

Available to hire

I’m John Oluwatosin Ajayi, a backend and fullstack mobile developer with 6+ years of experience building and scaling high-performance applications.

About

I’m John Oluwatosin Ajayi, a backend and fullstack mobile developer with 6+ years of experience building and scaling high-performance applications. I specialize in Python backend systems (FastAPI, Django, Flask) and Flutter cross-platform mobile development, with strong focus on secure APIs, real-time sync, payment integrations, and cloud-native deployments.

I’ve led and shipped production solutions across fintech and safety use-cases, including building a personal safety and emergency response app with 500+ active users and developing giftcard trading platforms with secure wallets, real-time exchange rates, and Paystack integrations. I enjoy architecting resilient systems, optimizing performance, and collaborating with teams to deliver user-centered products end to end.

  • 7 years' experience
  • Joined October 2026

Languages

  • EnglishAdvanced

Industry experience

  • Education
  • Healthcare
  • Financial Services
  • Software & Internet
  • Professional Services
  • Media & Entertainment

More experts in Ibadan, Nigeria

Work experience· 6 roles

Fullstack Mobile Developer · SafelifyJan 2023 – Jan 2025 · 2 yrs 1 mo

Developed a personal safety and emergency response app with live tracking, SOS alerts, and Firebase backend services. Built backend workflows for alert processing and secure syncing, and implemented push notifications, background location tracking, and offline-first design. Helped scale adoption to 500+ active users while maintaining high reliability and quality, including a 5.0 iOS App Store rating with no reported crashes.

Fullstack Mobile Developer · SkillsquaredJan 2022 – Jan 2024 · 2 yrs 1 mo

Contributed to software development for production web and mobile solutions for client projects delivered by the agency, supporting the full SDLC including requirements, development, testing, deployment, and user training.

Full Stack Web Developer · Kwara Tech AcademyFeb 2021 – Dec 2023 · 2 yrs 11 mos

Designed and built LMS and web platforms using Django, PostgreSQL, and responsive UI patterns. Delivered dynamic sites using Django MVC, HTML/CSS/JavaScript/AJAX for real-time features, and ensured cross-browser compatibility and SEO-friendly layouts. Automated testing and deployment workflows to improve release cycles.

Chief Technology Officer (CTO) · Tunmyque HubJan 2020 – Jan 2025 · 5 yrs 1 mo
Freelance Web Developer · Torify TechNov 2019 – Nov 2020 · 1 yr 1 mo
Lead Backend & Mobile Engineer · NeobottechJan 2018 – Jan 2025 · 7 yrs 1 mo

Education

B.Sc. Technology Education (Electrical/Electronics) · University of Ilorin, Kwara State2018 – 2022

Certifications and awards

WAPCo Scholarship Recipient2030 – 2026

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