Open to remote and on-site roles

I build the backend that makes products work.

I'm Chima Kalu, a full-stack developer in Abuja, Nigeria. Over 6 years I've built APIs, fintech integrations and client websites with Node.js, React, Vue and PHP, from database to interface.

Download CV (PDF) See my work GitHub

6+Years building production software

4Companies and clients worked with

8Live projects you can open

40–60%Tool cost cut by the Zowasel email platform

About

Backend-first, comfortable across the stack.

I'm a backend-leaning full-stack developer who likes owning a feature end to end: the data model, the API, and the screen a user actually touches.

At Zowasel I built an email marketing platform from scratch that replaced paid external tools. At Essolo I worked on a B2B banking platform, integrating supplier APIs for virtual cards, transfers and airtime. Since 2024 I've worked with a UK-based client, building and maintaining their portfolio of live websites.

I mentor newer developers, write clear code, and prefer boring, reliable solutions that stay up.

Based inAbuja, Nigeria
FocusNode.js APIs, integrations
FrontendReact, Vue, Svelte
EducationB.Sc. Computer Science
AvailabilityRemote or on-site

Experience

Where I've worked

JUL 2024 – PRESENT

Freelance Web Developer

Direct client contract, UK-based · Remote

Build, maintain and manage a portfolio of web projects for a UK-based client, working across several projects and time zones.
Deliver client websites from requirements to production, including Royal Pixy and Vygor Ltd.
Maintain live sites such as izuobani.com, zetcsolutionsltd.com and ksji897.com.

JAN 2023 – JUN 2024

Software Developer (Backend-Leaning)

Zowasel, agritech / SaaS · Remote

Built a greenfield email marketing platform (Node.js, Express, Vue.js) with admin panel, user dashboard and REST API, cutting external tool costs by 40–60%.
Created a reusable email template system that reduced campaign prep time by about 50%.
Added multi-user collaboration to remove editing conflicts across the admin team.
Designed a Staff Task Manager and a Support Ticket Assignment & Monitoring system, improving internal tracking efficiency about 3×.
Contributed to a platform-wide rebuild with a ~30% gain in performance and reliability.

JAN 2022 – NOV 2022

Full-Stack Developer

Essolo, fintech B2B banking platform · Remote

Built REST APIs for business onboarding: registration, OTP-based login and secure authentication.
Integrated third-party fintech supplier APIs for virtual cards, PIN management, transfers, card payments and airtime recharge.
Built the matching frontend in Svelte and Bootstrap.
Fixed issues found in QA and pre-release testing, keeping a low-defect release record.

JAN 2020 – DEC 2021

Web Developer

Javatek Africa · Hybrid

Built and maintained client web applications with PHP, MySQL, JavaScript and jQuery.
Mentored aspiring developers on HTML, CSS, JavaScript, PHP, MySQL and deployment.
Worked on requirement analysis, implementation and delivery for live client projects.

Projects

Selected work

Zikel Solutions

Client · Featured

Corporate website for a consultancy offering strategic consulting, management support, and workflow/AI software for healthcare providers, social care organisations and enterprises.

ReactTypeScript

Visit zikelsolutions.com →

Spec Fund Management

Client · Featured

Website for an SEC-regulated asset management firm offering structured investment vehicles, fixed income trading, wealth management and financial consultancy.

HTMLCSSJavaScriptPHPMySQL

Visit specfundmanagement.com →

Royal Pixy

Client · Built solo

Digital media and creative wellness platform delivering structured content, lifestyle resources and personal empowerment insights.

PHPMySQL

Visit royalpixy.com →

ZETC Solutions Limited

Client

Corporate site for a firm offering management consulting, capacity-building training, tax advisory, executive recruitment and healthcare governance.

Visit zetcsolutionsltd.com →

Izuchukwu Obani