Field notes · Accra, Ghana

Everything I build
starts as an experiment.

I'm Dillion, a full-stack developer with a research edge. I work across the stack, from interfaces people enjoy using to machine learning models and backend systems that stay reliable under pressure.

Open to research roles, graduate study, freelance work and collaborations.

Read the entriesPlay in the lab
Dillion Amartey
Dillion, AccraFig. 1
Builds with
Go · TypeScript · React / Next.js · Python · PostgreSQL
Research
How input representation shapes gait recognition
Building now
Sannu, an AI website assistant · Progresso, a school platform
Based in
Accra, Ghana · GMT (UTC+0)

§ 01About

Full-stack developer
with a research edge.

Three-plus years working with JavaScript frameworks, building web applications and tackling machine learning problems. I got into software through curiosity; it stuck because there's always something harder to figure out.

My work spans frontend engineering, backend APIs, embedded systems and deep learning research. I've shipped things people use and researched representations that improved on existing models.

BSc. Computer Science from the University of Ghana. Right now I'm working through C and Rust.

Superscripts point to the experiments where I used each skill. Select one to jump there.

Frontend

Backend & Data

ML & Research

Infrastructure

§ 02Experience

Where I've worked.

  1. Oct 2024 – Aug 2025

    Huawei Technologies
    Osu, Accra

    Software Product Manager

    • Technical liaison between business stakeholders and engineering teams for enterprise platforms, including AI Contact Centre (AICC) and Convergent Billing Systems (CBS).
    • Reviewed UI flows and system behaviour with developers to verify usability, clarity and functional requirements.
    • Led cross-functional planning using Agile principles, keeping specs focused on maintainable, scalable implementation.

  2. Feb 2022 – Apr 2023

    Hedge Pensions Trust
    Osu, Accra

    Systems & IT Officer

    • Maintained business-critical internal systems and diagnosed infrastructure and application issues across the network.
    • Designed structured backup and recovery processes that improved data security and reliability.

  3. Sep 2022 – Nov 2022

    Bank of Ghana Hospital
    Accra

    Financial Officer

    • Short placement: cost forecasting, budgeting and accounting data in TriMed.

§ 03Projects

Selected experiments.

Each entry is written the way I work: a hypothesis, a method and what actually happened.

GitHub ↗
  1. Exp. 022026 – PresentPrivate · Product in development

    Sannu

    Hypothesis
    A small organisation's website can answer visitors and book meetings without someone watching a chat window all day.
    Method
    A private website assistant that answers only from knowledge the owner approves, books meetings with the right person and hands over to a human when it should.
    Result
    In development. It will run on this site soon.
    1. 01Visitor asks

      A widget added with one script tag. Replies stream in as they're written.

    2. 02Retrieve

      Searches only the knowledge the owner approved, stored in PostgreSQL with pgvector.

    3. 03Answer

      The model replies from those sources and says so when it doesn't know.

    4. 04Act

      Books a meeting with the right person, or hands the visitor to a human.

    Fig. 2 How Sannu answers a visitor. Questions it can't answer land in an inbox, so the knowledge grows where visitors need it.
    • Go
    • Next.js
    • PostgreSQL
    • pgvector
    • Docker
    • Cloudflare R2
    • AI
  2. Exp. 032026 – PresentPrivate · Product in development

    Progresso

    Hypothesis
    Ghanaian Primary and JHS schools can share one platform while each school's records stay its own.
    Method
    A multi-tenant school management platform built for the Ghanaian basic-school setting.
    Result
    In development.
    1. 01School address

      Each school has its own address. The edge resolves which school a request is for.

    2. 02Token must agree

      A signed-in user's school has to match the address, or the request stops.

    3. 03Scoped query

      Services get no raw database handle, only one already filtered to that school.

    4. 04Explicit escape

      Reading across schools needs a deliberately named call that's easy to audit.

    Fig. 3 How Progresso keeps each school's records its own. This is replacing about 190 hand-written school filters across 29 services, any of which a future edit could drop. The seven highest-risk services have moved over; the rest follow as they are next changed.
    • Go / Fiber
    • React
    • TypeScript
    • PostgreSQL
    • Redis
    • Cloudflare R2
  3. Exp. 04Jan – Nov 2024Full-stack build

    Pharmacy Management System

    Hypothesis
    Pharmacy operations run smoother when inventory, transactions and workflows live in one system.
    Method
    Component-based React and Tailwind frontend on Flask REST APIs with PostgreSQL.
    Result
    A responsive app covering inventory management, transactions and business workflows.
    • Figma
    • React.js
    • Tailwind CSS
    • Flask
    • REST API
    • PostgreSQL
  4. Exp. 05Sep 2025 – PresentLaravel modernisation

    Legacy E-Commerce Refactor

    Hypothesis
    A legacy shop can be brought up to current framework conventions without a rewrite from scratch.
    Method
    Rewrote controllers, routes and views, resolved dependency conflicts and hardened security.
    Result
    Ongoing: a more maintainable, more secure codebase on current Laravel conventions.
    • PHP
    • Laravel
    • Composer
    • Refactoring
    • Security
  5. Exp. 062023Machine learning

    Brain Cancer Image Classification

    Hypothesis
    Classical models and CNNs can separate cancerous from healthy brain images.
    Method
    SVM and CNN models trained on Kaggle datasets, with careful preprocessing and tuning.
    Result
    A reproducible notebook comparing both approaches.
    • CNN
    • SVM
    • Python
    • Kaggle
    Code ↗
  6. Exp. 072022IoT · Embedded

    Smart Bin Monitoring

    Hypothesis
    Waste collection can be triggered by need instead of a fixed schedule.
    Method
    An ultrasonic sensor measures fill level and a GSM module sends disposal alerts.
    Result
    Built, then extended with a dashboard showing bin levels in real time.
    • Arduino
    • C++
    • Embedded C
    • GSM
    • Ultrasonic Sensor
  7. Exp. 082026 – PresentPublic learning log

    Systems Journey: C → Rust

    Hypothesis
    Learning C properly first makes Rust's rules make sense.
    Method
    Working through the classic K&R exercises in C, with written notes for every topic, before moving to Rust.
    Result
    Ongoing, in the open.
    • C
    • Rust
    • Systems
    Code ↗
  8. Exp. 092023Django app

    Financial Accounting App

    Hypothesis
    Tracking spending by category makes a budget easier to keep.
    Method
    Django and MySQL with expense categories, budget targets and analysis views.
    Result
    A personal finance tool that supports day-to-day budget decisions.
    • Django
    • Python
    • MySQL

§ 04The Lab

Small experiments you can play.

Some come from things I've built or studied; others are just for fun. Each loads only when you press play.

  • Trial 01 · New every day

    Question of the Day

    One question a day on AI, ML, software, Linux, systems and more. One try. Share it and see who gets it.

  • Trial 02 · Gait research

    Guess the Angle

    One walker, eleven cameras. Guess which angle you're looking at.

  • Trial 03 · Ghana

    Oware

    The West African sowing game, against a computer that can be easy or ruthless.

  • Trial 04 · Pick your language

    Spot the Bug

    Fifteen languages, three snippets each. Click the line that would bite you.

  • Trial 05 · Gait research

    Representation Match

    Pair six ways of turning a walk into an image with their names.

  • Trial 06 · A classic

    Word Guess

    Guess the five-letter tech word in six tries, with colour hints after each guess.

  • Trial 07 · A classic

    2048

    Slide the tiles, merge matching numbers and try to reach 2048.

§ 05Notes

Written up properly.

How the research and the things on this site actually work, for anyone who wants the details.

All notes
  1. · 3 min readTeaching a browser to play OwareThe rules of Abapa, the most common way Oware is played in Ghana, and the hundred lines of minimax that make the Lab's computer opponent easy or ruthless.
  2. · 3 min readA daily quiz with link previews, on a free Cloudflare WorkerHow Question of the Day gives every day its own preview card on LinkedIn and WhatsApp, keeps answer stats, and still costs nothing to run.
  3. · 4 min readHow you compress a walk decides what a network can learnFive ways to turn a walking sequence into one image, two CNNs, and why the input representation mattered more than we expected.

§ 06Credentials

Education & Certifications.

§ 07Contact

Let's build something together.

Open to research roles, graduate study, freelance work and collaborations. If you're working on something and want a thoughtful pair of hands or a fresh perspective, reach out.

Email me CV ↗ LinkedIn ↗ GitHub ↗