Senior Software Engineer

Building reliable systems
for the work that matters.

I'm Shuaibu, a senior engineer with eight years shipping production software across regulated and high-volume domains. Currently at PwC Nigeria, helping enterprises meet the country's e-invoicing mandate.

› available for select consulting

About

I work where compliance, scale, and developer ergonomics intersect RegTech, FinTech, HealthTech, and Retail SaaS. The throughline is the same: take a hard, high-stakes problem and ship something dependable, observable, and quiet.

Past lives include architecting multi-tenant retail systems at Timart for 60,000+ merchants and 100k+ daily transactions, and leading the EHR frontend at Iturah Health. I care about clean domain models, pragmatic DevOps, and the parts of the codebase nobody wants to inherit.

Lately I'm drawn toward energy and other infrastructure-grade domains (climate, logistics, govtech): the kind of work where reliability, compliance, and long time horizons compound.

Experience

PwC Nigeria

2026 to Present

Senior Software Engineer · InvoiceTracker

Building PwC's enterprise e-invoicing platform aligning Nigerian businesses with the FIRS Merchant–Buyer Solution mandate.

Multi-tenant invoice submission pipeline (Next.js · NestJS · PostgreSQL · Redis · AWS) issuing IRNs sub-second under enterprise load.
ERP connectors for SAP, Oracle NetSuite, and Microsoft Dynamics, eliminating manual reconciliation for tax teams.
Signed audit trails, RBAC, and PII tokenisation aligned with NDPR and PwC global security standards.
CI/CD on GitHub Actions with Terraform, blue/green deploys, and Datadog observability, supporting 99.9% availability.

Timart

2020 to 2025

Fullstack Software Engineer

Architected the multi-tenant retail platform from a few hundred merchants to 60,000+ active stores processing 100k+ transactions daily.

Event-driven microservices on Node.js, Redis, PostgreSQL, deployed to AWS ECS, 99.8% uptime over five years.
Migrated performance-critical services from Node.js to Go, lifting throughput by 43%.
Designed payment orchestration over Paystack and Flutterwave with fraud controls aligned to CBN and PCI-DSS.
Offline-first PWA with WebSocket sync for low-connectivity markets, 37% reliability improvement on the merchant app.
Led code quality, testing, and CI/CD culture across the engineering team.

Iturah Health

2021 to 2022

Senior Frontend Engineer

Owned the frontend of a HIPAA-aligned EHR and telemedicine suite, turning clinical workflows into interfaces clinicians actually wanted to use.

Real-time telemedicine integrating Zoom SDKs and WebSockets for secure rooms, queues, and low-latency video.
Multi-step intake workflows with rigorous Zod validation, protecting the integrity of critical patient records.
Modular design system in Storybook that cut frontend technical debt by ~30%.

Paritie Dynamic

2017 to 2020

JavaScript Developer

Refactored legacy codebases into modern TypeScript, built out testing culture (Jest + Cypress to 92% coverage on critical flows), and mentored juniors on the team.

Selected Work

01 · RegTech

PwC InvoiceTracker

Problem Nigerian enterprises had limited time to comply with FIRS's new e-invoicing mandate, but their ERPs (SAP, Oracle, Dynamics) had no native path to the regulator.

Solution An enterprise platform that validates invoices in real time, issues IRNs with QR codes, brokers ERP↔FIRS traffic, and produces audit-ready reporting, with RBAC, signed audit trails, and SLA-grade observability.

Next.js· NestJS· PostgreSQL· Redis· AWS· Terraform

Visit platform →

02 · Retail SaaS · FinTech

Timart Desktop

Problem Retail merchants in low-connectivity markets needed POS and inventory software that didn't fall over when the internet did, but still synced cleanly to the cloud the moment it returned.

Solution An offline-first Electron app with local SQLite and WebSocket-based reconciliation, multi-store support, and POS hardware integration. Now handles 100k+ daily transactions across 60k+ stores.

Electron· React· Node.js· Go· SQLite· WebSockets

Download →

03 · AI · Conversational

Timart AI Assistant

Problem Many merchants find traditional dashboards friction-heavy. They already live in WhatsApp, that's where the work should happen.

Solution A WhatsApp-native assistant that turns voice notes and chat into product creation, inventory updates, and sales tracking, backed by OpenAI and the WhatsApp Business API.

Node.js· OpenAI· WhatsApp Business API

Try on WhatsApp →

Stack

Languages

TypeScript · JavaScript · Go · Python · SQL

Frontend

Next.js · React · React Native · Remix · Electron · Tailwind · Storybook · TanStack Query

Backend

Node.js (NestJS, Express) · Go · Django · FastAPI · PostgreSQL · Redis · Kafka · RabbitMQ · Prisma

Infrastructure

AWS (ECS, Lambda, RDS, S3, CloudFront) · Terraform · Docker · GitHub Actions · Datadog · Sentry · OpenTelemetry

Practice

System design · Domain-driven design · Multi-tenant SaaS · Offline-first sync · Compliance (NDPR, PCI-DSS, HIPAA-aligned) · Mentorship

Contact

Working on something real?

I read every email. The fastest way to reach me is below, happy to talk about regulated platforms, scaling pains, or thoughtful engineering hires.

Building reliable systems for the work that matters.