Constance Etiosa
Let's talk

Available for new projects

I build products, write about them, and help developers fall in love with them.

Web and mobile developer, technical writer and developer advocate. I ship production apps for startups and small businesses, and I write and speak so that developers can pick up new technology faster.

Start a projectRead my writing
articles published
50+
reads across platforms
250K+
people reached at talks
2,600+
products shipped
11
01

What I do

I work with startups, agencies and developer-tool companies. You can hire me to build a product, to explain it, or both.

01

Web applications

Marketing sites, dashboards and SaaS products built with React, Next.js and TypeScript. Fast, accessible, and easy for your team to maintain.

02

Mobile apps

Cross-platform iOS and Android apps in Flutter, from first prototype to App Store and Play Store release.

03

Technical writing

Docs, API references, tutorials and blog posts that help developers understand your product and ship with it quickly.

04

Developer relations

Community programs, workshops, talks and content strategy that connect your product with the developers it is built for.

Have a project in mind? Let's talk
02

Selected work

Products I have designed, built or shipped for clients in fintech, logistics, education, SaaS and Web3.

Open source & experiments

AI API Sandbox

A Postman-style API client with a Claude-powered side panel that explains responses, suggests next requests and diagnoses errors as you work.

Next.js · TypeScript · Claude API

Velvet Journal

A calm, privacy-first journaling app. Entries stay on the device by default.

Flutter · Riverpod · Firebase

03

Writing

Tutorials, explainers and essays on web development, Web3 and product design. More than 50 articles and 250K reads so far.

All posts on HashnodeAll posts on Substack
04

Speaking

Talks, panels and workshops for developer communities. I am open to conference, meetup and podcast invitations.

On video

Introduction to Building a Chatbot with Google Dialogflow

A Not So Deep Dive Into Networking

05

About

I work where engineering meets communication. Most weeks that means shipping a Next.js or Flutter app for a client. Other weeks it means writing the docs, tutorials and talks that help developers adopt a product.

I have built for fintech, logistics, education and Web3 teams across Nigeria and beyond. I have also spoken to more than 2,600 people at developer events about blockchain, layer 2s and getting started in tech.

Based in Lagos, Nigeria and working remotely with teams worldwide.

Web
React, Next.js, TypeScript, Node.js, Django, Tailwind CSS
Mobile
Flutter, Dart, iOS, Android
Data
PostgreSQL, MongoDB, GraphQL, REST
Tooling
Git, Docker, AWS, CI/CD, Figma
Content
Docs & API references, Tutorials, Workshops, Public speaking
06

Let's build something together.

Tell me about a product, a docs project, a talk or a community program. The form works, and so does plain email.

etiosaconstance@gmail.com