An engineering organization with one engineer and no shortcuts.
Zyntlow is the name over the whole body of work: three products live in production and twenty-two more built since 2023, across commerce, financial infrastructure, field operations, health and developer tooling.
- Founded
- 2023
- Base
- Accra, Ghana
- Live products
- 3
- Projects built
- 25
Photography pending — the work is the portrait for now.
I am Adams Eugene, a software engineer in Accra, Ghana. During the day I lead the front end at Pilgrim Consultancy on Heatmap, an e-commerce analytics platform — revenue attributed to every element, conversion funnels, session replay, and the instrumentation that makes all three trustworthy.
The rest of the time I build the products collected here. It started as client work — a laundry, a school, a clinic — and turned into something more deliberate once the same problems kept reappearing: stock that nobody trusts, a till that stops when the network does, records spread across three notebooks and a WhatsApp thread.
TallyhubGH is the clearest expression of that: a commerce platform with 61 screens, 572 server routes and 76 data models, shipping as a web app, an installable PWA and a desktop binary, with an on-device model answering questions about the business without sending a byte anywhere.
Two of those products are live today:TallyhubGHfor commerce, and Kernvofor banking surfaces. Zyntlow exists so the rest of the work reads as what it is — a practice with a consistent way of building — rather than a list of repositories.
Where the practice was learned
Six years of paid work before and alongside Zyntlow. The employer is the company that paid; where the product is better known than the company, both are named.
Zyntlow
NOW2023 — presentAccra, GhanaFounder & Principal EngineerThe independent practice, and the products on this site. Alongside them, contract work for Ghanaian businesses — a savings-and-loans institution, a poultry farm, a beauty retailer, schools, salons and a church administration — which is where most of the offline-first and multi-tenant thinking was paid for before it became a product.
Pilgrim Consultancy
NOWAugust 2023 — presentRemoteLead Frontend EngineerLead front end on Heatmap, an e-commerce behavioural analytics platform: a 500-component Vue application rendering revenue-attributed heatmaps, conversion funnels and session replay, with visual element selection for custom event tracking, AI-assisted insight generation, and IndexedDB caching to keep large recordings responsive. Integrations out to Mixpanel, Amplitude, Intercom, HubSpot and Slack.
Asqii Inc.
February — August 2023RemoteFrontend DeveloperA school-management progressive web app built to keep working without a connection — React and TypeScript on the surface, SQLite compiled to WebAssembly underneath so records persisted in the browser rather than waiting on a server.
JLS Trading Co
September 2021 — August 2022RemoteFull-Stack EngineerTwo products end to end: a school-management application covering exams, reporting and billing, and a bug-tracking platform on a Node back end with a React client. Also the first mentoring — bringing intern developers through full-stack work.
KNUST
September 2020 — September 2021Kumasi, GhanaResearch & Teaching AssistantResearch in computer architecture and FPGA design, and undergraduate tutorials with the supplementary material to go with them. The hardware end of the degree — and the reason correctness at the bottom of a stack reads as normal rather than pedantic.
Six positions, held consistently
These are not aspirations. Each one has cost something to hold, which is how you know it is real.
Correctness before polish
A receipt that prints the wrong total is worse than an ugly one. Money paths get invariants, idempotency and audit trails first; animation comes after.
Assume the network fails
Every product is designed for the moment connectivity drops mid-transaction. Local-first storage, replay queues and explicit sync state are defaults, not features.
One codebase, many surfaces
Web, installable app, desktop binary and second customer-facing screen should share logic. Platform differences belong behind a utility layer.
Density is a feature
Operators live in these screens for eight hours. Keyboard flows, tabular numbers and information density beat generous whitespace in the tools that run a business.
Own the whole stack
Schema, API, client, desktop packaging and deploy pipeline. Understanding the seams is what makes the hard bugs findable.
Build for where you are
Built in Ghana for businesses that run on intermittent power, shared devices and mobile money — constraints that produce better software everywhere.
Practice areas in full
What each area covers, and how much of the portfolio sits inside it.
- D-01
- Commerce Systems04
- Multi-tenant retail and wholesale platforms: offline-capable point of sale, warehouse-scoped inventory, purchasing, credit sales and reporting. The largest and oldest area of the practice — it is where most of the hard engineering lives.
- D-02
- Financial Infrastructure01
- Core-banking and money-movement surfaces: account hierarchies, double-entry ledgers, transaction lifecycles, KYC-style onboarding flows, and matching web plus mobile clients.
- D-03
- Field & Agriculture Ops01
- Livestock and field operations tooling — attendance, feed, yields, labour and cost tracking for teams working outside reliable connectivity, where sync and conflict handling matter more than polish.
- D-04
- Health & Care Systems02
- Hospital and maternal-care systems: patient records, appointments, departments, clinical workflows and the APIs behind them.
- D-05
- Web Experience & Analytics04
- Behavioural analytics and conversion tooling: heatmap rendering pipelines, element-level revenue attribution, widget and plugin runtimes, page-quality grading and performance instrumentation.
- D-06
- Developer Tools & Automation04
- Editors, orchestrators, canvases and pipelines: SDLC automation, code workspaces, design canvases, sync bridges and internal services.
- D-07
- Learning Platforms04
- E-learning, assessment and school-management products: course delivery, consultancy booking, automatic marking of exam papers, student and staff records, and mobile companions.
- D-08
- Consumer & Local Services05
- Appointment-driven and community-facing products: salons and barbershops, front-desk operations, ordering, rentals, waste collection and church or community platforms.
Working on something that needs to hold up?
Architecture reviews, offline-first data models, dense operational interfaces, or a platform that has outgrown its first version.