John Oluwatosin
Ajayi
Backend & Fullstack Mobile Developer
Seasoned software engineer with 6+ years of experience architecting high-performance mobile and web applications. Expert in Python backend systems and Flutter cross-platform development.
About Me
I'm a seasoned Backend & Fullstack Mobile Developer with 6+ years of experience architecting and scaling high-performance mobile and web applications. My expertise spans Python backend systems (FastAPI, Django, Flask) and Flutter cross-platform mobile development.
Throughout my career, I've delivered production-grade solutions at Tunmyque Hub, Neobottech, and Safelify — including a personal safety app with 500+ active users and fintech platforms processing 10k+ transactions. I specialize in secure APIs, real-time data sync, payment integrations, and cloud-native deployments.
I'm passionate about leading fullstack teams, optimizing performance, and driving user-centric product growth. Whether it's building microservices architecture or scaling mobile applications, I bring technical excellence and strategic thinking to every project.
Skills & Tech Stack
Backend Development
Mobile Development
Database & Storage
DevOps & Cloud
Frontend & Web
Tools & Practices
Technology Proficiency
Deep expertise across the full technology stack
Backend Development
Mobile Development
DevOps & Cloud
Professional Experience
Chief Technology Officer (CTO)
- •Directed full-stack architecture for a scalable WordPress platform, integrating FastAPI microservices for user analytics, notifications, and third-party sync
- •Designed and deployed secure REST APIs handling 10k+ daily requests with JWT authentication and rate limiting
- •Implemented CI/CD pipelines using GitHub Actions, reducing deployment time by 45%
- •Led team of 5 developers in agile sprints, code reviews, and cloud infrastructure management on AWS
Lead Backend & Mobile Engineer
- •Founded and scaled agency delivering 12+ production mobile apps using Flutter + Python backend stack
- •Architected Django/FastAPI backends with PostgreSQL, Redis, and Dockerized microservices deployed on AWS ECS
- •Built Donxchange — real-time giftcard trading app with secure wallet, rate engine, and instant payouts
- •Developed MystreetTab — digital payment platform for street vendors with offline sync and inventory tracking
- •Optimized API response times from 800ms to 180ms through query tuning and caching strategies
Fullstack Mobile Developer
- •Engineered Flutter cross-platform app with real-time location sharing, SOS alerts, and emergency contact routing
- •Built FastAPI backend for alert processing, user authentication, and secure data syncing via Firebase
- •Integrated Paystack for premium subscriptions and achieved zero crashes across Android & iOS
- •Secured 5.0 rating on iOS with 500+ active users and 9% conversion rate
Fullstack Developer
- •Developed Donxchange: Fullstack giftcard marketplace with real-time exchange rates and secure transactions
- •Built MystreetTab: Vendor management system enabling cashless payments in informal markets
- •Designed database schemas, ETL pipelines, and admin dashboards using Django ORM and React
- •Automated testing and deployment workflows, achieving 40% faster release cycles
Full Stack Web Developer
- •Built LMS platforms using Django, PostgreSQL, and vanilla JavaScript with responsive UIs
- •Managed full SDLC: requirements, development, testing, deployment, and user training
- •Ensured cross-browser compatibility and SEO-friendly, responsive designs
Freelance Web Developer
- •Delivered dynamic websites using Django MVC, HTML, CSS, and AJAX for real-time features
- •Ensured cross-browser compatibility and SEO-friendly, responsive designs
- •Managed client relationships and project timelines for multiple concurrent projects
Featured Projects
Livespring
Christian ministry platform providing online services, sermon resources, event management, and community engagement tools for churches and believers.
Ministry Platform
Safelify
Multi-service platform providing comprehensive safety and wellness solutions including airport concierge, healthcare, telehealth, and legal services.
Healthcare & Services Ecosystem
Safelify Elite - Airport Concierge
Premium airport concierge service providing VIP assistance, fast-track security, lounge access, and personalized travel support.
Airport Services
Safelify HMS - Health Management
Comprehensive health management system for hospitals and clinics with patient records, appointments, and medical staff coordination.
Healthcare Management
Safelify Telehealth Portal
Telemedicine platform enabling virtual consultations, prescription management, and remote patient monitoring.
Telehealth Platform
Safelify TeleLegal
Online legal consultation platform connecting clients with lawyers for virtual legal advice and document services.
Legal Services
BOD Property Partners Ltd
Comprehensive real estate platform showcasing properties, agent listings, and client management systems.
Real Estate Solutions
Townhall Today
Nigeria's social townhall mobile app - similar to Twitter, enabling community discussions and civic engagement. Currently in MVP stage.
MVP • Social Platform
MyDivineMatch
Faith-based dating platform connecting individuals with shared values and beliefs for meaningful relationships.
Dating Platform
MyRealEx
Modern dating platform with advanced matching algorithms and secure communication features.
Dating Platform
Creative Mindz Inc
Educational platform providing courses, learning materials, and student management for creative development.
Education Platform
AsporaWork
Language learning platform designed to help users master new languages through interactive lessons and practice.
Language Learning
Agrisummex
Agriculture business website showcasing farming solutions, agricultural products, and industry expertise.
Agriculture Business
Tunmyque
Community platform with custom FastAPI microservices layer over WordPress, featuring analytics and automation.
10k+ daily API requests
Megethos Heritage
Digital ebook reading platform providing access to diverse literature and educational content.
Ebook Platform
ELI Africa
Comprehensive learning platform delivering educational content and courses across Africa with interactive features.
Learning Platform
Recognized Expertise
AWS Certified Solutions Architect
Amazon Web Services
Google Flutter Developer Certificate
Python Professional Certificate
Python Institute
Client Testimonials
What real clients and organizations say about working with me
Outstanding work on our property management platform. The backend infrastructure handles our extensive listings seamlessly, and the user experience is exceptional.
John's technical expertise transformed our vision into a sophisticated multi-platform solution. The HMS, Telehealth, and TeleLegal portals exceed expectations.
Building a Twitter-like platform for Nigeria required scalable architecture and real-time capabilities. John delivered an impressive MVP that handles our growing user base beautifully.
The matching algorithms and real-time chat features John implemented are robust and secure. His attention to user privacy and data protection is commendable.
Our e-learning platform required complex course management and user tracking. John's backend solutions are maintainable, scalable, and performance-optimized.
Services I Offer
Comprehensive software development solutions tailored to your business needs, from initial concept to production deployment.
Backend Development
Scalable REST APIs, microservices architecture, and robust server-side solutions using Python, FastAPI, Django, and Flask.
Full-Stack Web Development
End-to-end web application development with modern frameworks, responsive design, and seamless user experiences.
Mobile App Development
Cross-platform mobile applications using Flutter with offline-first architecture and real-time synchronization.
WordPress Development
Custom WordPress solutions, theme development, plugin integration, and API extensions for enterprise needs.
API & Payment Integrations
Third-party API integrations, payment gateway setup (Paystack), and secure transaction processing systems.
DevOps & Cloud Solutions
CI/CD pipelines, Docker containerization, AWS deployment, and infrastructure management for scalable applications.
Transparent Pricing
Professional, scalable, and transparent pricing tailored to your project needs. All prices are based on Nigerian market standards.
(For client projects. Flexible for employment opportunities)
Hourly Rates
Backend Development
₦12,000 – ₦20,000
per hour
API development, database design, authentication, integrations (Django, FastAPI)
Frontend Web Development
₦10,000 – ₦18,000
per hour
Responsive UI, dashboard integration, API consumption
Mobile App Development
₦15,000 – ₦25,000
per hour
Cross-platform Android & iOS apps, Firebase, real-time features
Daily Rate
₦80,000 – ₦150,000
per day
8 hours of focused development work
Project-Based Pricing
Business Website
₦300,000 – ₦600,000
per project
5–10 pages, admin panel, contact forms
Web Application
₦700,000 – ₦2,000,000
per project
User auth, dashboards, backend APIs
Mobile App (MVP)
₦1,200,000 – ₦3,000,000
per project
Flutter app, backend API, authentication
Fintech / Payment App
₦2,500,000 – ₦5,000,000
per project
Wallets, Paystack/Flutterwave, admin panel
Monthly Retainer
Basic Support
₦250,000 – ₦400,000
per month
Bug fixes, monitoring, small updates
Standard Support
₦500,000 – ₦800,000
per month
Ongoing development & feature updates
Dedicated Developer
₦1,000,000 – ₦1,800,000
per month
Full-time monthly commitment
WordPress Development
Basic WordPress Website
₦200,000 – ₦350,000
per project
3–5 pages, premium theme, contact form, SEO, responsive
Business / Corporate Website
₦350,000 – ₦700,000
per project
5–10 pages, custom layout, blog, admin dashboard, security
Advanced WordPress Website
₦700,000 – ₦1,200,000
per project
Custom theme, plugins, booking forms, user roles
WooCommerce / E-commerce
₦800,000 – ₦1,800,000
per project
Products, payment gateway, order management, notifications
WordPress Maintenance
₦80,000 – ₦200,000
per month
Updates, backups, security monitoring, content updates
Important Notes
- Prices are based on Nigerian market averages
- Final cost depends on scope, timeline, and complexity
- 40–50% upfront payment required for project-based work
- Urgent or high-risk projects may attract premium pricing
Neobot Tech • Professional • Transparent • Scalable
Let's Work Together
Available for freelance projects, full-time opportunities, and consulting. Let's discuss how I can help bring your ideas to life.
Get in Touch
Contact Information
© 2025 John Oluwatosin Ajayi. All rights reserved.