Isaiah Nyalali
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§ 01 Case files

Things I've built, and what they changed.

Production platforms, telecom automation and ventures. Each file covers the problem, the approach and the result, with numbers where I'm allowed to share them.

11 files shown

Case No. 01Live

Own platform · Founder & sole engineer · 2025 —

Shop by Isaiah — a commerce platform built for Tanzania

My own e-commerce platform, designed around how Tanzanians actually buy: mobile money, SMS and delivery by rider. I designed, built and run every layer, from the storefront to the 20-plus-module operations dashboard.

Problem

Small sellers run on WhatsApp chats, cash reconciliation and handwritten receipts. Orders get lost, payments are hard to match, and there is no stock picture.

Approach

Mobile-money checkout via Snippe with signed webhooks. Order, dispatch and inventory tracking. Sourcing and purchase orders. SMS and e-mail notifications, digital receipts and PDF invoices.

Outcome

A production system that takes payment, confirms it automatically and keeps buyer, seller and rider informed. Customer data is encrypted at rest, behind a strict security policy.

  • PHP 8.2
  • MySQL
  • Vanilla JS
  • Snippe payments
  • NextSMS / BRIQ
  • PII encryption
  • CSP
shop.isaiah.me.tz ↗
Case No. 02Internal tool

Huawei Technologies · Airtel Tanzania project

License & Alarm Tracker — LTE/5G OSS automation

A browser-based tracker with two modules, bringing equipment licences and faults from two iMaster MAE OSS systems (Mwanza and Dar es Salaam) into one view. It replaced manual spreadsheet tracking.

Problem

Licence and alarm data lived in separate OSS exports and spreadsheets. Reports took hours, manual entry caused errors, and nobody had one view across both systems.

Approach

It separates LTE and 5G licences automatically from OSS Excel exports and classifies alarm CSVs by severity, NE type and status. Each OSS's data stays isolated, with a combined master view on top. It is local-first: vanilla JS with IndexedDB and localStorage, fully offline, nothing to install, and data never leaves the machine. Built iteratively with GenAI assistance on GTSLLM.

Outcome

Live dashboards for licence counts, expiry and alarm summaries, with data-freshness indicators. Daily and monthly Excel/PDF reports, import-diff analysis (new and resolved) and shift-handover summaries are generated automatically. Manual entry errors are gone.

Hours → minutesRoutine report turnaround2
2 → 1OSS systems, one view
0Installs, servers or data leaving the machine
  • Vanilla JS
  • IndexedDB
  • localStorage
  • Excel / PDF export
  • iMaster MAE
  • LTE / 5G
  • GTSLLM
Case No. 03Proprietary

Huawei Technologies · Professional Services

Site Solution Generator

An internal automation tool that generates telecom site designs from planning data, used on national rollouts including Vodacom Spring 6, TTCL Rural Coverage and UCSAF Phase 8.

Problem

Each site design was assembled by hand. It was slow, repetitive and error-prone across hundreds of sites.

Approach

A Python and Pandas pipeline that reads planning inputs, applies the design rules and outputs a ready solution, with validation built in.

Outcome

Design time fell from 45 minutes to 3 minutes per site, with a 0% error rate on generated designs.

453 minDesign time per site1
15×Faster
0%Error rate
  • Python
  • Pandas
  • RAN design
Case No. 04Venture

CEO & CTO, founder · 2023 – 2025

SeLink Tanzania

A Progressive Web App that turns SMS-based SGR train tickets from Tanzania Railways Corporation into scannable QR codes. Built offline-first, with careful message parsing and secure local storage for low-connectivity journeys.

  • PWA
  • Service Workers
  • Offline-first
  • QR
Case No. 05Venture

CEO & CTO, founder · 2023 – 2025

TwigaCV

A SaaS builder for ATS-friendly CVs, with PDF generation, multiple templates and secure authentication. Built end-to-end on the MERN stack; it was also my final-year project at UDSM CoICT.

  • MongoDB
  • Express
  • React
  • Node.js
  • PDF
Case No. 06Venture

CEO & CTO, co-founder · 2022 – 2023

Unikoba

A campus fintech wallet. Students deposited meal money and paid at cafeterias from the app, so food budgets couldn't drift into other spending.

  • Fintech
  • Wallet
  • Payments
Case No. 07Live

Public tool

Salarika

A Tanzanian salary, HESLB and loan calculator. It works out net pay after PAYE and social security, and estimates how much loan you can afford.

salarika.netlify.app ↗
Case No. 08Live

Academic platform · CoICT, UDSM

BIT2025 by Isaiah

My academic archive for the CoICT class of 2025: course materials, an ATS CV builder and study tools in one place.

bit2025.isaiah.me.tz ↗
Case No. 09Live

Client website · Clean energy

Nishati Eco

A website for a Tanzanian clean-cooking company selling eco-friendly charcoal briquettes and efficient cookstoves.

nishatieco.co.tz ↗
Case No. 10Open docs

API documentation

SGR Docs

Developer documentation for the TRC SGR public trip-search API, so developers can integrate with Tanzania's railway trip data.

Case No. 11Open docs

API documentation · Payments

PalmPesa Docs

Everything a developer needs to integrate the PalmPesa payments API with cURL, with request and response examples.

  1. 1. Average design time per site, measured during Huawei Professional Services projects, 2025.
  2. 2. Routine daily and monthly licence and alarm report preparation, Airtel Tanzania OSS operations.

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