COSMAS ANAYOCHUKWU ONYEKWUO
Front End Engineer
Github: Cossy1 Email:-LinkedIn: Cosmas Onyekwuo Contact: -
PROFESSIONAL SKILLS
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Agile Methodologies
Code Quality Improvement
Financial Payment Systems
Cross-platform Development
Clean Code Practices
Code Refactoring
Cross-Functional Collaborations
TECHNICAL SKILLS
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Language: Javascript, Typescript
Mobile Development: React native, Expo
Front-End: Libraries and Frameworks: React, Next JS, Axios, React Query, react-HTTP-query, Micro-Frontend,
Module Federation
Data Visualization: Graphical rendering (Recharts, Chart js).
State Management Tools: Redux, Redux-toolkit, Zustand, Context API.
CSS and CSS Libraries: Styled-Components, TailwindCSS, SCSS, AntDesign
Other Skills: Rest APIs, CI/CD( Docker, Github, GitHub Actions, Azure ), Server-side CSS (LESS, SASS), Node, swagger
Security: CORS, Axios-Interceptors, HTTP
EMPLOYMENT HISTORY
Senior Front-End Engineer React
Jan 2024 – Present
Peerless SGC
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Developed and deployed an Audit log Web application, utilizing Next Js and Typescript, for different micro-frontend
modules and services to track activities and sessions of users in different modules of the application, increasing
work-flow by 80%
Optimally Integrated and consumed third-party APIs and Internal API services
Onboarded recruits on the Frontend team and assisted in setting up the code environment
Member of the team building a revolutionary core banking application in Africa
Engaged in Code review sessions, reviewed and approved pull requests, before merging code to the development branch
Actively engage in sprint planning sessions with the team lead, engineering manager, and the rest of the engineering team
Solved several bugs, in different micro-frontend modules and optimized different components, reducing load times by
70%.
Crafted acceptance criteria and user requests, sketched wire-frames and designed frontend architecture during
sprint planning sessions with internal and external clients.
Senior Front End Engineer React
March 2024 - Nov 2024
Vsured(Emerging fintech start-up from Sub-Saharan Africa with an integrated security solution that leverages technology &
VAS)
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Led the design and implementation of a scalable, maintainable frontend architecture utilizing react, vite, and typescript for
VSURED, resulting in a 30% reduction in development time and increased codebase scalability for future features.
Created intuitive, seamless interfaces for sharing access codes and managing visitors, improving user satisfaction and
boosting platform adoption by 40% across communities.
Integrated React Query and Tanstack Query to handle real-time data fetching and caching, reducing data retrieval time by
50% and improving system reliability.
Implemented pagination, data synchronization, and background fetching, which improved system responsiveness and
contributed to a 25% increase in operational efficiency for community admins.
Employed performance optimizations such as code-splitting and lazy loading, reducing load times by 35%, and ensuring a
faster, smoother user experience even with large datasets.
Defined acceptance criteria, user stories, and sketched wireframes during sprint planning sessions, aligning frontend
architecture with business goals, leading to 100% on-time feature delivery.
Front-End Engineer React
Nov 2021 - Dec 2023
Sterling Bank(Sterling Bank is a full-service national commercial bank in Nigeria that has evolved from the nation’s preeminent investment banking institution to a fully-fledged commercial bank.)
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Part of the team that built the version 2.0 of the Altmall e-commerce application and increased the customer base from
20,000 to 50, 000 users.
● Optimally Integrated and translated several screens for the web functionality in record time on the Altmall project.
● Personally, integrated the frontend authentication flow on the vendor side of the Altmall project.
● Created several reusable components and ensured uniformity across the system
● Ensured the use of code splitting for better optimization and speed on the system which led to very fast load time
Engaged and anchored reviews and demos with engineers and stakeholders alike.
Front-End Engineer React
Nov 2020 - Oct 2022
Voomsway Innovations
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Collaborated effectively with the business, product owners, backend engineers to improve the development process.
Part of a team that designed a travel booking web app: where users could compare and view trips of several
transport companies, it works on React/Redux as frontend.
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Spearheaded performance optimization initiatives by employing techniques such as code splitting and lazy loading,
resulting in a 30% reduction in initial load times and a 25% increase in application speed
Developed a suite of custom React hooks that improved code modularity and reusability across multiple projects,
resulting in a 20% reduction in development time.
Leveraged the power of storybook for proper component Documentation.
Optimized API calls with a dynamic data-fetching hook, reducing code length and boosting data retrieval speed by 30%.
Wrote extensive test cases for components used across different projects.
Received a salary increase by 50 percent directly from the CEO as a means of promotion for improvement in work.
Front-End Engineer
Jan. 2018 - Nov. 2020
Trusoft Limited
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Collaborated with cross-functional partner teams to identify and implement project requirements
Worked closely with other developers in all projects.
Partook in the Implementation of a fitness mobile application for a client.
Actively Engaged in code reviews.
Actively managed state using Redux.
PROJECTS HIGHLIGHT
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Digisphire: A platform for organizing and promoting industry conferences and summits that focus on global
transformation across various sectors.
Altmall: An e-commerce platform powered by Sterling Alternative Finance that allows customers to purchase a wide range of
products with the flexibility to pay in installments.
Vsured Community App: A community-based multi-tenant web application used for granting access to residents
and non-residents to certain properties
CERTIFICATIONS
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Serverless Computing
EDUCATION
Yaba College of Technology, Lagos Nigeria
Higher National Diploma, Computer Science
Jan. 2018 – Feb. 2024
