available for select engagements
I am Sulaiman, a software engineer who builds backends & platforms and engineering tools
Senior Software Engineer with 7+ years across full-stack development, distributed systems and fintech. I've architected finance platforms that lifted revenue 45%, orchestrated $120M+ in payouts, and pushed system performance up by 60%.I am a great student of knowledge, and I love building with team that ship.
- 7+
- years shipping
- $120M+
- payouts orchestrated
- 99.9%
- transfer success rate
- 45%
- revenue lifted
$ git log --author=sulaiman --oneline
Experience
Seven years across fintech, identity and web performance — from banks to global startups.
Senior Software Engineer & Backend Engineering Lead @ Startbutton
Mar 2025 — PresentNigeria · Remote · Full-time
- Built an automated transfer orchestration system with smart retry, lifting transfer success rate to 99.9%.
- Designed a transaction-posting engine powering the company wallet, and migrated a single-entry wallet to a double-entry ledger.
- Shipped an AI customer-support chatbot using RAG, improving support efficiency by up to 80%.
TypescriptNode.jsMongoDBRabbitMQRedisRAGSenior Software Engineer @ Macrometa
Jul 2024 — Feb 2025USA · Remote · Full-time
- Automated web performance analysis and reporting, cutting bottlenecks and improving load times by 60%.
- Optimized Core Web Vitals with Lighthouse & Puppeteer, JS bundling and critical-CSS extraction.
LighthousePuppeteerTypeScriptWeb PerfNestJSNextJSSenior Software Engineer @ Seamfix
May 2023 — Jul 2024Nigeria · Remote · Full-time
- Built and maintained the Seamfix Capture Library — face matching, liveliness checks and background cleanup.
- Developed the ID Verification Widget and a Vanilla JS SDK, streamlining developer onboarding.
Angular2+MongoDBNestJSTypeScriptJavaScript SDKComputer VisionSenior Software Engineer @ ScalingFunds
Feb 2022 — Jan 2023Germany · Remote · Part-time
- Designed and deployed scalable applications supporting €4bn in investments.
ReactNode.jsGraphQLSenior Front-end Developer @ Dalet
Jan 2021 — Dec 2021France · Remote · Contract
- Migrated Dalet Pyramid's frontend to a micro-frontend architecture, boosting performance by 60%.
AngularReduxSingle-spaSenior Software Engineer @ Kobo360
Dec 2019 — May 2023Nigeria · Hybrid · Full-time
- Built 15+ microservices powering invoicing, payments and wallets — increasing revenue by 45%.
- Led technical teams on process and best-practice improvements, raising productivity by up to 40%.
Node.jsMicroservicesPostgreSQLKafkaLead Front-end Developer @ Fidelity Bank
Aug 2018 — Dec 2019Nigeria · On-site · Full-time
- Designed SME account-opening platforms, increasing client acquisition by 40%.
- Developed a virtual banking chatbot, improving customer satisfaction by 60%.
JavaScriptReactChatbot
$ ls -la ~/projects
Selected Work
A sample of systems I've designed and shipped. Coming soon...
$ cat package.json | jq .skills
Toolbox
The tools I cook with for the software engineering kitchen.
"languages & frameworks":
"data & messaging":
"cloud & devops":
"domains":
$ tail -n 3 ~/blog/*
From the pen and keyboard
Notes and quick thoughts on distributed systems, system design, system performance and engineering generally.
$ ./say-hello.sh
Let's talk
Building something in fintech, identity or platform engineering? I'm open to fractional leadership, consulting and select full-time roles.