Backend · Payments · PSP
2026
Available for new engagements
I design reliable backend systems for complex products.
Payment systems rarely fail on the happy path. They fail when a callback arrives twice, a provider times out mid-transfer, or a transaction gets stuck between states.
Bank of Africa Group platforms (via Synapse) · Wave, Orange Money, Free Money integrations · Ecom 360 in production.
A scoped engagement starts with a written brief. I reply within two business days with fit and a start date. The current role at Synapse, for Bank of Africa, is full-time and on-site. Calls in French; English in writing.
Expertise
Backend, payments, PSPs, AI. One requirement: the system stays correct.
One engineer, six domains. Five are tied to systems I have shipped or published. Applied AI stays a direction, with an audit trail — not a client product.
Expertise in detail →Working with me
A named engineer, a written scope, a firm quote.
For a fintech, a bank, or a product team with a backend, payment, or PSP problem. You work with me, not a rotating bench. Remote from Dakar.
Ranges are indicative, in EUR. Confidential client code stays off this site. The public proof is named above.
Where to start
Three starting points, depending on why you are here.
Hiring and architecture depth are below. The ways to work together are just above.
Experience
Where the work happened.
Everything is independently verifiable. No paid badges, no invented quotes. Named recommendations stay on LinkedIn. The Synapse contract title is Consultant Backend Engineer. Senior describes the level of the work.
- Synapse GroupeFeb 2025 — PresentConsultant Backend Engineer — Banking & Payment SystemsEmbedded in Bank of Africa Group's engineering teams through Synapse Groupe — enterprise banking platforms for payments, transfers, and transaction processing across 11+ subsidiaries.
- ENG Technologie GroupeJul 2023 — Feb 2025Software Engineer — FinTech, Digital Lending & Mobile MoneyBuilt backend microservices for a FinTech platform covering digital lending, payment processing, and mobile money integrations.
- Mafalia — Ecom & Fintech appsJun 2022 — Nov 2023 · parallel with ENG from Jul 2023Software Engineer (Freelance) — SaaS for SMEs & Informal RetailBackend development for a SaaS platform helping SMEs and informal retailers manage sales, inventory, orders, and finances.
- Full experience
Case studies
What shipped, and what is lab work.
Each project states its nature: production, confidential professional patterns, or a personal lab.
Approach
Start from the problem. Make the trade-offs explicit.
Architecture Lab
Reference designs, architecture decisions, and playbooks.
Open labs for payment orchestration, dual PSP, and the ledger. Nothing here describes a client production system.
AI-assisted payment operations — anomaly investigation on controlled data, with an audit trail — is a direction I am exploring. It is not a shipped client product.
Open the lab →Send the problem, not a pitch deck.
Two business days. I reply with fit and a start date — or I say it is not a match.
- The system, and the failure that matters
- Constraints: regulation, timeline, who operates it after
- Sprint, review, build, or an embed