Karen Chioma Okonkwo
Verified Expert in Engineering
Software Developer
London, United Kingdom
Toptal member since December 15, 2021
Karen is a software engineer with four years of professional experience. She loves building web software solutions that impact users. Karen is well-versed in creating easy-to-use, responsive, accessible, and user-friendly websites and web applications. She is also experienced in the development of back-end services and APIs. A developer with an excellent grasp of engineering concepts, data structures, algorithms, and system designs, Karen makes sure to provide the best possible quality.
Portfolio
Experience
Availability
Preferred Environment
Visual Studio Code (VS Code), Git, Linux, MacOS
The most amazing...
...project I've worked on is an app for a digital and inclusive bank that provides financial services to anyone who has a phone number.
Work Experience
Software Engineer
Bloomberg
- Built full-stack tools to ensure that the most valuable content was being written and promoted by Bloomberg's 3000+ editorial staff worldwide to 300,000+ Bloomberg Terminal subscribers at all times. Used Python, TypeScript, Kafka, and Comdb2.
- Created solutions to privileged large datasets curated by Bloomberg's data journalists using Python and React.
- Acted as the Scrum Leader for my team, orchestrating efficient sprint planning, daily stand-ups, and retrospectives, fostering a cohesive and agile team environment.
- Facilitated seamless communication among cross-functional teams, ensuring alignment with project goals and timely delivery of high-quality software solutions.
Software Engineer
Freelance
- Architected and developed fully functional, accessible, and responsive web applications using various tools and technologies for multiple clients.
- Provided services that spanned from front-end development to full-stack application development.
- Built a full-stack application for Anozie Stores to manage their orders and allow users to track their order status, significantly improving their customers' shopping experience.
- Implemented the website for a digital health company. The goal was to create an aesthetically pleasing user experience while providing comprehensive information about the product's offering.
- Developed a website for Geraldine’s Flourish Foods to boost its online presence, provide information about products and services, and offer a platform for customers to purchase their products.
- Created an MVP for a property technology startup, Rentgage. I built a mobile application for the product's client side and a back end to go with it.
- Made an MVP for a restaurant management system and a fully functional, accessible, and responsive UI for the product's web application using React. I integrated the web application with the back end using RESTful API endpoints.
- Handled the translation of various designs and wireframes into high-quality code for front-end systems.
Front-end Developer
Partnerbeat, Inc.
- Enhanced Partnerbeat's real-time collaborative meeting note platform, leveraging advanced libraries and tools like YJS, Prosemirror, Tiptap, and Hocuspocus for seamless multi-user editing.
- Integrated Google Calendar to automatically link notes to meetings and connected the platform with CRM tools like Salesforce and Hubspot to create actionable insights and facilitate next steps based on meeting interactions.
- Developed Google Docs-style sharing permissions, enabling users to create and share personal or team-specific notes with customizable access controls for individual or organization-wide sharing.
- Refined the user interface using Figma designs, making UI/UX improvements for a visually appealing, intuitive user experience.
- Added support for customizable meeting templates, allowing clients to streamline note-taking for different meeting types.
Front-end Engineer
Softcom
- Built out the web application for the third version of the Eyowo (Eyowo X) using React and TypeScript. Eyowo is a fintech product that provides online personal and business banking and other financial services to 600,000+ users in Nigeria.
- Built out the non-graduates (N-creative) web portal for the NPower program, a job creation and skills empowerment scheme created by the Nigerian government for over one million applicants using React and TypeScript.
- Collaborated with other teams and disciplines, including back-end developers, product managers, designers, UI developers, and QA testers to deliver value with each product.
- Worked with designers to translate various designs and wireframes into high-quality code.
Software Engineer | Intern
GRIT Systems Engineering Ltd.
- Maintained the existing web dashboard for multi-source power and energy monitoring leveraging React, TypeScript, and Material UI.
- Built out the web interface to facilitate the trading of electricity, providing a way for clients to reduce the waste of excess energy produced.
- Developed Python microservices for User and Order management using Flask.
- Ensured the organization of the software team to improve workflow.
Experience
Eyowo Bank's Web App Version 3
Website for Geraldine's Flourish Foods
Order Management and Tracking for Anozie Stores
Iddera
https://www.iddera.com/Nuvle's Minimum Viable Product (MVP)
A Minimum Viable Product for Rentgage
WhatsApp Web Clone
https://whatsapp-clone-web.netlify.app/Abeg App Clone
https://abeg-app-clone.netlify.app/Blog Scribbles
https://scribbles-blog.netlify.app/Fyyur
Education
Bachelor's Degree in Computer Engineering
University of Lagos - Lagos, Nigeria
Certifications
JavaScript Algorithms and Data Structures Masterclass
Udemy
SQL for Joining Data
DataCamp
Intermediate SQL Queries
DataCamp
Webpack 2: The Complete Developer's Guide
Udemy
Full-stack Developer Nanodegree
Udacity
React Front To Back
Udemy
Front-end Developer Nanodegree
Udacity
Skills
Libraries/APIs
Node.js, React.js, REST API, API Development, Socket.IO, Google Calendar API
Tools
GitHub, Git, Auth0, Webpack 2, Babel
Languages
JavaScript, HTML, CSS, HTML5, TypeScript, CSS3, SQL, Python, GraphQL, C++
Frameworks
Redux, Flask, Express.js, Next.js, Tailwind CSS, React Native
Paradigms
Object-oriented Programming (OOP), Unit Testing, Responsive Web Design, REST, Agile Development, Testing
Storage
Database, JSON, MongoDB, Amazon S3, Database
Platforms
Docker, Linux, MacOS, Visual Studio Development, AWS, HubSpot Development, Salesforce Design
Other
Software Engineering, Front-end, Web Development, Responsive Design, APIs, UI Development, Web UI, Web UX Design, UX Development, Axios, Data Structures, Algorithms, Digital Computers, Web Accessibility, Client-side JavaScript Frameworks, Cross-browser Compatibility, Progressive Web Applications (PWAs), Strapi, Headless CMS, Computer Architecture, System Programming, Data Modeling, API, Identity & Access Management (IAM), Containerization, Deployment, Back-end Developers, MERN Stack, Data Science, Tiptap, ProseMirror, Hocuspocus
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring