Fintech & distributed systems · High‑throughput APIs · Secure, observable services
- Backend engineer with strong DevOps/SRE habits and a database background (PostgreSQL, MSSQL, MySQL, Redis).
- Build and operate payment & revenue collection systems, inventory and map‑aware apps (PostGIS), and high‑reliability APIs.
- Comfortable on bare‑metal/VPS as well as cloud (AWS · Azure · GCP). CI/CD with GitHub Actions.
- Pragmatic, security‑minded (MFA, RBAC, audit trails) with deep care for logs, metrics and tracing (Sentry, New Relic).
- Recent wins: reduced a critical workflow from 3+ minutes → ~50 seconds; supported daily volumes of 100k+ transactions/log events.
- Payments: resilient ledgers, idempotency, reconciliation, AML/CFT and PCI considerations.
- Django @ scale: async views where useful, DB‑first performance (indexes, partitions, materialized views), caching.
- Ops: predictable deploys, GitOps‑y workflows, least‑privilege infra, incident response playbooks.
Languages: Python, SQL, Bash, Go (learning)
Frameworks: Django, FastAPI, Lumen (PHP), Sanic, Flask
Data: PostgreSQL (+ PostGIS), MSSQL, MySQL, MongoDB, Redis
Infra/Tools: Linux, Nginx, Gunicorn (Unix sockets), Systemd, Docker, GitHub Actions, Poetry, New Relic, Sentry
Stack: Python · Django · PostgreSQL · Redis · Django‑Q2 · Nginx/Gunicorn
- Idempotent payment flows · reversible transactions · audit‑grade logging
- KYC/KYB hooks · compliance flags · dispute/reversal workflows
- CI/CD with GitHub Actions; environment‑specific settings
Repo: Private (case study on request)
Stack: Django · PostgreSQL · Celery/Queues · DRF
- Multi‑warehouse, batch/lot, movement ledger
- Low‑stock alerts; supplier and purchase orders
Repo: Private (case study on request)
Stack: Django/FastAPI · PostgreSQL · Redis
- USSD short‑code flows for staking
- Mobile money (MoMo) integration; tokenised payments; idempotent debits
- Per‑partner branding for media organizations; rate limits; audit logs
Repo: Private (case study on request)
Stack: Django · Channels/WebSockets · PostgreSQL · Redis · PostGIS (optional)
- Realtime voter turnout dashboard and statistics
- GOTV tools (broadcasts/targeted nudges) and exit‑poll collection
- Heatmaps & constituency overlays; observer/incident reports
Repo: Private (case study on request)
Stack: Django · PostgreSQL · Celery/Queues
- Commission rules engine (tiers, time windows, exceptions) with reconciliation
- Scheduled payouts, transactional statements, and dispute workflows
Repo: Private (case study on request)
Stack: Django · PostGIS
geography=Trueusage examples, spatial indexes, distance queries, tile caching notes
Repo: Private (case study on request)
Stack: Django · DRF · Telegram Web Apps
- Inline keyboards + web‑app flows, session store patterns, enum/stack‑based navigation
Repo: Private (case study on request)
Stack: Python · GitHub Actions · Docker
- Release & deploy automation for Django/API services (tagging, changelog, image build & push)
- Rollback playbook, health checks, and environment‑specific configs
Repo: https://github.com/andrewadu/shipmate
- Using Django Q2, reporting issues and small patches where possible.
- Exploring Go for high‑concurrency services and CLIs.
- Google Cloud Fundamentals – Core Infrastructure (notes & quiz prompts).
- Incident checklists and postmortem template.
- Email: andie.89@icloud.com · LinkedIn: https://www.linkedin.com/in/andrew-adu-01276781 · Portfolio: https://builtbyandie.dev
Last updated: Aug 14, 2025