Available to hire
I am Yayi Muhammed, a software engineer with four years of direct experience working with backend systems and web clients. I have worked with programming languages such as JavaScript, TypeScript, Python, and Golang, along with databases like Postgres and MongoDB. I am passionate about creating scalable, secure, and efficient software solutions.
Throughout my career, I have collaborated cross-functionally with DevOps, product, and frontend teams, delivering robust APIs and optimizing system performance. I have experience implementing rigorous unit testing and leading refactoring efforts, consistently ensuring code reliability and project success.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Work Experience
Full-Stack Engineer (Backend Heavy) at Earnipay
September 1, 2024 - PresentArchitected and maintained scalable backend systems to support Earnipay’s financial technology operations, ensuring high availability and low-latency performance. Collaborated cross-functionally with DevOps, product, and frontend teams to deliver robust and secure APIs for financial services. Implemented and optimized savings features within the platform, enabling users to manage their savings goals, automate transfers, and track progress. Designed and integrated data processing pipelines and backend services using Node.js and NestJS, optimized for speed and reliability. Integrated third-party financial APIs and improved system monitoring and logging to enhance operational efficiency.
Full Stack Engineer at Uleval Technology
August 31, 2024 - August 7, 2025Spearheaded the development of software applications leveraging React for the frontend and NestJS for the backend, ensuring seamless integration and optimal performance. Integrated Rabbit MQ for reliable message brokering and asynchronous task handling, and Kafka for efficient handling of high-throughput data streams and real-time analytics. Implemented rigorous unit testing protocols for three critical modules within NestJS, ensuring code reliability and robustness. Led refactoring efforts for up to three legacy codebases, achieving a significant speed improvement of 30% or more through strategic optimizations, modernization techniques, and adoption of Kafka for scalable data processing.
Full-Stack Engineer at Onhova
September 1, 2023 - August 7, 2025Designed and developed scalable backend architectures using Node.js and NestJS to support Onhova platform, resulting in 30% improvement in system performance. Collaborated with frontend engineers, product managers, and QA teams in Agile environments to deliver end-to-end solutions for complex business requirements, ensuring timely project delivery and alignment with stakeholder expectations. Conducted regular security audits and vulnerability assessments, implementing robust security measures to safeguard sensitive information and ensure compliance with industry standards and regulations. Optimized database schemas, API endpoints, and microservices to accommodate growing user traffic and data volume, resulting in enhanced platform efficiency and user experience.
Full-Stack Engineer at Calm Global Technology
March 31, 2022 - August 7, 2025Optimized database schemas, API endpoints, and microservices to accommodate growing user traffic and data volume, resulting in enhanced platform efficiency and user experience. Refactored and optimized up to two legacy codebases, resulting in notable performance enhancement of over 20%. Implemented strategic improvements and modern coding practices to streamline code efficiency and boost overall system speed which enhanced better user experience. Collaborated with frontend engineers, product managers, and QA teams in Agile environments to deliver end-to-end solutions for complex business requirements, ensuring timely project delivery and alignment with stakeholder expectations.
Freelance Software Developer
May 31, 2021 - August 7, 2025Developed full-stack applications, including e-commerce platforms, blogs, and landing pages, leveraging React, Node.js, and Django. Designed responsive and user-friendly UI/UX, ensuring seamless cross-platform experiences. Implemented secure and scalable backend solutions, optimizing performance and reliability.
Full-Stack (Backend Heavy) at Earnipay
September 1, 2024 - PresentArchitected and maintained scalable backend systems to support Earnipay's financial technology operations, ensuring high availability and low-latency performance. Collaborated cross-functionally with DevOps, product, and frontend teams to deliver robust and secure financial services APIs. Implemented and optimized savings features enabling users to manage savings goals, automate transfers, and track progress. Designed and integrated data processing pipelines and backend services using Node.js and NestJS, optimized for speed and reliability. Integrated third-party financial APIs and enhanced system monitoring and logging to improve operational efficiency.
Full Stack Engineer at Uleval Technology
August 31, 2024 - September 3, 2025Led development of software applications using React for frontend and NestJS for backend, ensuring seamless integration and optimal performance. Integrated RabbitMQ for reliable message brokering and asynchronous task handling, and Kafka for efficient handling of high-throughput data streams and real-time analytics. Implemented rigorous unit testing protocols for three critical modules within NestJS to ensure code reliability and robustness. Led refactoring of up to three legacy codebases achieving significant speed improvements of 30% or more through strategic optimizations, modernization techniques, and adoption of Kafka for scalable data processing.
Full-Stack Engineer at Onhova
September 1, 2023 - September 3, 2025Designed and developed scalable backend architectures using Node.js and NestJS supporting Onhova platform resulting in 30% system performance improvement. Collaborated with frontend engineers, product managers, and QA teams in Agile environments to deliver end-to-end solutions for complex business requirements, ensuring timely project delivery and stakeholder alignment. Conducted regular security audits and vulnerability assessments implementing robust security measures to safeguard sensitive information and ensure compliance with industry standards and regulations. Optimized database schemas, API endpoints, and microservices to accommodate growing user traffic and data volume, resulting in enhanced platform efficiency and user experience.
Full-Stack Engineer at Calm Global Technology
March 31, 2022 - September 3, 2025Optimized database schemas, API endpoints, and microservices to accommodate growing user traffic and data volume, resulting in enhanced platform efficiency and user experience. Refactored and optimized up to two legacy codebases resulting in notable performance enhancement over 20%. Implemented strategic improvements and modern coding practices to streamline code efficiency and boost overall system speed which enhanced better user experience. Collaborated with frontend engineers, product managers, and QA teams in Agile environments to deliver end-to-end solutions for complex business requirements ensuring timely project delivery and stakeholder alignment.
Freelance Software Developer
May 31, 2021 - September 3, 2025Developed full-stack applications including e-commerce platforms, blogs, and landing pages leveraging React, Node.js, and Django. Designed responsive and user-friendly UI/UX ensuring seamless cross-platform experiences. Implemented secure and scalable backend solutions optimizing performance and reliability.
Education
B.Tech in Transport Management at Ladoke Akintola University of Technology
January 1, 2010 - January 1, 2015B.Tech in Transport Management at Ladoke Akintola University of Technology
January 1, 2010 - January 1, 2015Qualifications
Node.js and Express for Beginners
January 11, 2030 - August 7, 2025Complete Node Course with Node.js, Express.js and Socket.io
January 11, 2030 - August 7, 2025NestJS Zero to Hero - Modern TypeScript Backend Development
January 11, 2030 - August 7, 2025A guide to Django ORM | Master the Art of Querying Database
January 11, 2030 - August 7, 2025Full-stack web development with React and MongoDB
January 11, 2030 - August 7, 2025Node js and Express for beginners
January 11, 2030 - September 3, 2025Complete Node course with node js, express js and socket.io
January 11, 2030 - September 3, 2025Nest Js Zero to Hero - Modern TypeScripts Backend Development
January 11, 2030 - September 3, 2025A guide to Django ORM | Master the Art of Querying Database
January 11, 2030 - September 3, 2025Full-stack web development with React and MongoDb
January 11, 2030 - September 3, 2025Industry Experience
Software & Internet, Financial Services, Professional Services
Earnipay is a unified financial platform designed to empower both businesses and individuals. For businesses, it provides access to credit, high-yield accounts, and essential tools to drive growth. For individuals, it offers tailored solutions for savings, loans, and payments, all in one place.
As a Backend Engineer on the Earnipay team, I contribute to building and scaling the core platform that powers these services. My role involves designing and implementing robust APIs, integrating secure payment and credit systems, and ensuring high availability and performance. I focus on creating a reliable backend infrastructure that delivers a seamless, user-friendly financial experience for thousands of users.
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