Semeton Balogun

Bridge between country programme teams and the platform engineering team on DIGIT HCM, the open-source platform running national malaria campaigns (SMC and ITN).

• –Supported SMC and ITN campaigns across Abuja, Bauchi, Taraba and Borno, including on-site field support
• –Diagnosed activity dates being stamped at server sync time instead of on-device creation time: late-synced work counted against the next day's quota, locking field workers out of working days and skewing attendance-based payment. Documented the root cause and the fix requirement
• –Contributed to the stock-reconciliation design for an ITN distribution pilot: partial receipts, auto-returned shortfalls, and in-transit vs lost states in an offline-first ledger
• –Sizing infrastructure and support staffing for a 2027–29 multi-state campaign programme (11 states, ~27M target population)

DIGIT HCM · PostgreSQL · Elasticsearch · Kibana · Offline-first sync

Recruitment platform and HRMS modules (internal recruitment, exit, onboarding) for a multi-tenant HR suite serving enterprise clients.

• –Built the Kafka pipeline publishing recruitment, exit and onboarding data to the company data lake, as a non-blocking side effect so a mapping failure can't fail the primary write
• –Implemented the two-way integration between the recruitment platform and the core HRMS: requisition-to-job creation, status sync back, internal-applicant pre-fill, SSO with company-access checks, service-to-service auth
• –Led tenant-isolation and security hardening: SSRF-safe webhooks, company-scoped reads and writes, per-client mail credentials with delivery logging, throttled upload limits, GDPR self-service deletion (anonymise or hard-delete)
• –Backend for AI-assisted hiring: CV parsing, candidate ranking with normalised scores, automated screening; frictionless apply with no sign-up, OAuth pre-fill and magic-link login

PHP 8 · Laravel · MySQL · Kafka · Redis/Horizon · Algolia · S3 · Pest

Led engineering on Tangerine LMS: from a separate codebase per client to one multi-tenant platform, Tangerine365, running on-premise at banks and enterprises, as a self-serve cloud product, and inside Human Manager HRMS.

• –Set up version control and merged the per-client codebases into one, with per-client customisation — a bug fix now shipped once instead of once per deployment
• –Acted as solutions architect for client deployments: chose the architecture and server specifications, and represented engineering in every critical stakeholder meeting
• –Designed the hardest rollout, First Bank's three-tier on-premise deployment built to the bank's infrastructure requirements
• –Launched the self-serve cloud version at tangerine365.com, and made it the default learning module in Human Manager HRMS so every new HRMS tenant gets an LMS
• –Wrote a custom SQL Server driver alongside the MySQL default; deployed across IIS inside bank networks, Apache, DigitalOcean, and AWS; cut infrastructure costs ~85%
• –Built REST integrations with 5+ external organisations, ran security and load testing with OWASP ZAP and JMeter, and trained client teams on the platform

PHP 8 · Laravel · SQL Server · MySQL · Node.js · Memcached · Docker · IIS · Apache

Built the backend for an academic matching and funding platform.

• –Backend services and REST APIs in Laravel, integrated with a React frontend
• –Cut API response times ~50% through query optimization and indexing
• –Introduced staging environments and branching discipline; cut production errors by over 90%
• –Added email verification to eliminate ghost sign-ups
• –Integrated Flutterwave for payments, HubSpot for user management, and cron-driven email automation

Joined through Bincom's tech apprenticeship; became my first engineering role.

• –Backend components in Node.js and PHP across educational platforms (ARM Learn) and internal API systems
• –OAuth2 integrations with Google and Facebook
• –Trained 5+ interns; helped run technical community events

Tangerine365 — Led

Multi-tenant LMS deployed across Wema Bank, First Bank, PremiumTrust Bank, and Seven-Up Bottling Company.

A full rewrite of a legacy PHP 7.4 LMS into a multi-tenant PHP 8 platform with per-tenant database isolation. The hard part was the multi-database strategy — keeping MySQL as default while supporting SQL Server for the banks that required it, without forking the codebase.

Read: Part 1 · Part 2 · The hosting setup

PHP 8 · Laravel · MySQL · SQL Server · Docker · Jitsi Meet · LDAP · IIS

Terminoxx360 — Sole engineer, new version

Real-time ATM fleet monitoring, running at Access Bank.

I maintain the version running at Access Bank, where I fixed the jobs that stalled under database locks. I then rebuilt the platform as its sole engineer: a new version designed to avoid those locking problems, built to serve multiple countries and regional subsidiaries from one deployment.

Read: The hosting setup

Laravel · MySQL · Redis · Queue workers · Ollama · Claude · OpenAI

TrustCenta — Sole engineer

Two products: estate access control and a cybersecurity suite.

TrustPass handles QR-based entry passes for digital estates — role-based permissions, real-time revocation, web dashboard and mobile app. The Cybersecurity Suite wraps ZAP and Gophish behind clean APIs with scheduled scans and automated reporting.

Read: Post-mortem, Part 1 · Part 2

Laravel · Next.js · React Native · MySQL · Docker · ZAP · Gophish

Agent Contract — Creator

A governance runtime that puts deterministic guardrails around AI coding agents.

Published npm CLI that drops a policy layer into any repo so AI agents (Claude, Codex, Copilot) operate under explicit, enforceable rules instead of hoping they read the instructions file. Enforcement happens before writes land, not in post-hoc review. v0.8 on npm. I use it daily in my own agent-first workflow on production codebases.

Read: The writeup

Node.js · CLI · YAML · Claude · OpenAI