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I am a Senior Software Engineer with extensive experience building scalable web and mobile applications using React, React Native, TypeScript, and PHP, backed by modern cloud-based technologies. I have led cross-functional teams, architected robust solutions, and delivered high-impact fintech and enterprise products in fast-paced environments. I am passionate about crafting reliable, maintainable software and translating complex business requirements into practical technical solutions. I thrive on improving development processes, mentoring engineers, and driving technical excellence through code reviews, testing, and performance-focused practices. I enjoy collaborating with product, design, and operations teams to deliver delightful user experiences and measurable business value.…I am a Senior Software Engineer with extensive experience building scalable web and mobile applications using React, React Native, TypeScript, and PHP, backed by modern cloud-based technologies. I have led cross-functional teams, architected robust solutions, and delivered high-impact fintech and enterprise products in fast-paced environments. I am passionate about crafting reliable, maintainable software and translating complex business requirements into practical technical solutions. I thrive on improving development processes, mentoring engineers, and driving technical excellence through code reviews, testing, and performance-focused practices. I enjoy collaborating with product, design, and operations teams to deliver delightful user experiences and measurable business value.

Demilade Ologuntoye

Front-End Developer, Back-End Developer, Full Stack Developer, +2

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I am a Senior Software Engineer with extensive experience building scalable web and mobile applications using React, React Native, TypeScript, and PHP, backed by modern cloud-based technologies. I have led cross-functional teams, architected robust solutions, and delivered high-impact fintech and enterprise products in fast-paced environments. I am passionate about crafting reliable, maintainable software and translating complex business requirements into practical technical solutions. I thrive on improving development processes, mentoring engineers, and driving technical excellence through code reviews, testing, and performance-focused practices. I enjoy collaborating with product, design, and operations teams to deliver delightful user experiences and measurable business value.…I am a Senior Software Engineer with extensive experience building scalable web and mobile applications using React, React Native, TypeScript, and PHP, backed by modern cloud-based technologies. I have led cross-functional teams, architected robust solutions, and delivered high-impact fintech and enterprise products in fast-paced environments. I am passionate about crafting reliable, maintainable software and translating complex business requirements into practical technical solutions. I thrive on improving development processes, mentoring engineers, and driving technical excellence through code reviews, testing, and performance-focused practices. I enjoy collaborating with product, design, and operations teams to deliver delightful user experiences and measurable business value.

Available to hire

I am a Senior Software Engineer with extensive experience building scalable web and mobile applications using React, React Native, TypeScript, and PHP, backed by modern cloud-based technologies. I have led cross-functional teams, architected robust solutions, and delivered high-impact fintech and enterprise products in fast-paced environments. I am passionate about crafting reliable, maintainable software and translating complex business requirements into practical technical solutions.

I thrive on improving development processes, mentoring engineers, and driving technical excellence through code reviews, testing, and performance-focused practices. I enjoy collaborating with product, design, and operations teams to deliver delightful user experiences and measurable business value.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Yoruba

Intermediate

Work Experience

Lead Frontend Developer at CITADELS SOLUTION

March 1, 2025 - Present

Led the development of Seraphs Hymnal, a modern digital hymnal platform for churches, choirs, music ministers, and hymn lovers, enabling access to hymns across mobile devices for worship and personal devotion. Built and maintained cross-platform applications using React Native and Next.js, delivering scalable, production-ready experiences. Architected REST and GraphQL APIs to improve data flow and performance. Collaborated with product, design, and backend teams to translate requirements into maintainable frontend solutions aligned with business goals. Championed automated tests and code reviews to raise quality and reliability, and established performance-focused engineering standards across the team.

Senior Frontend Engineer at Peerless (Sterling Bank)

March 1, 2024 - April 1, 2025

Led the development of SeaBaaS, a cloud-native core banking platform, enabling real-time processing and rapid product deployment. Implemented a micro-frontend architecture allowing independent deployment of frontend modules, improving scalability and development velocity. Built responsive UIs for banking operations, customer management, and financial workflows. Contributed to a microservices-based ecosystem supporting modular services and cloud-native deployments. Integrated secure open APIs and third-party services for interoperability with banking infrastructure. Drove automated testing with Playwright and unit tests, reducing defects and accelerating validation. Also led the Next.js-based corporate website for SeaBaaS.

Senior Software Engineer at SIMPLIFY INTERNATIONAL SYNERGY LTD

March 1, 2023 - March 1, 2024

Contributed to the FGN Treasury Portal, enabling secure revenue payments via multiple electronic channels using React Native for mobile and React for web. Led the evolution of the Zeus Microfinance Bank digital banking platform, delivering secure mobile applications and web portals for digital account opening, account management, fund transfers, bill payments, transaction tracking, and wallet services. Delivered the Monibag web application to enhance remittance workflows. Maintained legacy Flutter apps and deployed a full PHP web application using CodeIgniter. Drove cross-functional collaboration, solution design, and feature implementation, while elevating code quality through tests and reviews.

Software Engineer at SYSTEM SPECS

May 1, 2022 - April 1, 2023

Developed and maintained cross-platform mobile applications using React Native, delivering fintech and education-focused products. Contributed to web apps with React and SCSS, integrated and optimized REST APIs, and collaborated with cross-functional teams to ensure secure, reliable, and high-performing experiences. Improved engineering efficiency through CI/CD automation with CodeMagic, streamlined testing workflows, and enhanced release processes. Led refactoring and code quality initiatives to improve maintainability and performance.

Full Stack Developer at FREELANCE

January 1, 2020 - May 1, 2022

Delivered custom web and mobile solutions for clients using React, React Native, Flutter, Node.js, and PHP. Led end-to-end project delivery, including requirements analysis, solution architecture, development, deployment, and post-launch support. Built cross-platform mobile apps for Android and iOS with emphasis on performance and UX. Integrated APIs, third-party services, and payment solutions to support complex workflows. Managed projects using Agile methods with Jira and Asana, and maintained strong client relationships through technical consultation and value delivery.

Information Technology Intern at NASD PLC

August 1, 2019 - January 1, 2020

Contributed to internal business platforms using PHP, CodeIgniter, and MySQL, delivering solutions that improved operational visibility and process efficiency. Built a mandate management system automating customer database administration and signature verification workflows. Authored technical and end-user documentation, improved application quality through structured testing and issue resolution, and collaborated with stakeholders to align solutions with business needs.