Emmanuel E.

Full Stack Engineer

Full-time available

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Bio

Emmanuel E. is a proficient Backend Engineer with a strong foundation in building and maintaining scalable backend systems. He has demonstrated expertise in technologies such as Express, TypeScript, SpringBoot, PostgreSQL, and Grafana. Emmanuel's experience spans across notable positions at Baxi by Onafriq and Pixavus, where he played a critical role in deploying systems for POS, MPOS, and Mobile Wallet services. His skills extend to optimizing system performance using tools like Redis and Nginx, and he is adept at…

  • Projects completed3
  • Hourly rate
  • 3-4 years experience
  • Member since Sep 2025
Expertise
NodeJSTypescriptGraphQLKubernetesAWSSQLMongoDBJavaPythonGitKafkaDatabase:RelationalDatabase:Document
Video Intro
Assessments

General Project Assessment

Great score on Debug and Enhance a ReactJS Property Search Component, Difficulty Easy · Great score on Create a React.js Movie Management Component, Difficulty Easy · Great score on Develop a React.js Quiz Game Application, Difficulty Medium · Great score on Design a Scalable NextJS News Portal, Difficulty Medium · Great score on Resolve Third-Party Service Delays in NextJs Application, Difficulty Medium

Projects

InvoiceHub

Collaborated with a team to build the backend APIs that powers InvoiceHub, a web application that was built as a project for the Stutern’s Hackathon. This application helps small business owners manage their clients and customers, track paid and unpaid invoices with real-time notifications on payment and daily happenings on their platforms. It also has Paystack Payment Integration for seamless payment experience for customers and clients. The application is under review by the organizers of the application.

Real Logistics

A backend API simplifies package delivery operations by providing real-time tracking and management features. Whether you're managing deliveries, tracking shipments, the application handles all.

Natours

A fully functional tour company’s website and web API for users to register and book for events. They can also give reviews based on their experiences.

Experience

  1. Backend Engineer

    Baxi by OnafriqJul 2021 — Present
    • Built and deployed scalable backend systems for POS, MPOS, and Mobile Wallet services using Express, TypeScript, SpringBoot, and PostgreSQL.
    • Designed and implemented RESTful APIs for seamless communication across platforms.
    • Optimized system performance, reducing response times by 36% through continuous monitoring and improvements using Grafana, PM2, Redis and Nginx.
    • Integrated third-party services like Stripe, PayStack and Twilio to enhance functionality and user experience.
    • Created documentation for backend systems, APIs, and integrations using Swagger and Postman.
    • Improve SEO ranking and application load time using NextJS
    • Migrated the core backend application from a monolithic system to a microservice system, reducing downtime by 42%. GRPC was using for service to service comunication and RabbitMQ and Kafka were used as the queuing system and background job handlers.
    • Implemented a real-time fraud detection tool using machine learning models, reducing fraudulent transactions by 43% within the first quarter of implementation.
    • Participated in CI/CD processes using GitHub Actions and Docker, ensuring smooth and automated deployments.
    ExpressTypeScriptSpringBootPostgreSQLGrafanaPM2RedisNginxGitHub ActionsDockerReactJSNextJS

  2. Backend Engineer

    PixavusNov 2020 — Jul 2021
    • Built, deployed and maintained scalable backend systems using NestJS, GraphQL, BullMQ, Docker and Kubernetes to support media sharing and real-time notifications.
    • Designed and optimized APIs to handle user interactions and live events efficiently.
    • Integrated AWS S3 bucket and CloudFront for content storage and delivery.
    • Integrated third-party services to enhance platform functionality and user experience.
    • Documented the APIs using Apollo GraphQL for cross-team collaboration.
    NestJSGraphQLBullMQDockerKubernetesAWS S3CloudFrontApollo GraphQL
Education

  1. Bachelor of Electrical Engineering

    University of Nigeria, NsukkaNsukka, Enugu, Nigeria.2015 — 2021

  2. Machine Learning

    Stanford - online (Coursera)Remote2023 — 2023
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