Python Backend Engineer - Fintech & Payments

HAKEEM ADEWALE OYERINMADE

Lagos, Nigeria +234********** ********@*****.***

LinkedIn: https://www.linkedin.com/in/hakeemoyerinmade GitHub: Adeakim

PROFESSIONAL SUMMARY

Results-driven Python Backend Engineer with 5+ years building and scaling high-performance microservices, payment systems, and API-driven platforms. Deep expertise in designing global payment integrations, telemedicine infrastructure, and fintech solutions for emerging markets. Proficient in cloud-native deployments (AWS, Docker, CI/CD), async Python,Proven record of delivering reliable, scalable systems across distributed teams. TECHNICAL SKILLS

Backend: Python · FastAPI · Django · Flask · Node.js Cloud & Infra: AWS · Docker · CI/CD · RabbitMQ · Kafka Databases: PostgreSQL · MySQL · Redis

Frontend: React.js ·Nextjs ·JavaScript · TailwindCSS PROFESSIONAL EXPERIENCE

Python Backend Engineer — SBSC (UBA)-- Jan 2026 – Present

● Developed Django REST Framework microservices for a multi-channel banking self-service platform, supporting web, mobile, USSD, and custom channels.

● Built secure channel API-key authentication, role-based access control, and country-level tenant isolation for user and administrative APIs.

● Implemented configurable service-request workflows, including dynamic forms, approval processes, customer validation, fulfilment, and request tracking.

● Integrated external banking, notification, and audit services, while improving reliability through automated tests, API documentation, and CI/CD deployments.

Python Backend Engineer — GoFlex Jan 2025 – Dec 2025

● Building and scaling the Django backend powering GoFlex — an international payments and invoicing platform for freelancers, solopreneurs, and entrepreneurs — enabling seamless cross-border payments across multiple currencies and regions.

● Engineered GoFlex's end-to-end invoicing system with automated payment reminders, real-time tracking, and direct Stripe payouts, eliminating the SWIFT and PayPal friction that typically blocks global freelancer earnings.

● Built an escrow system enabling secure fund holding between clients and freelancers, with milestone-based release logic and automated dispute triggers to protect both parties in international transactions.

● Developed a dispute resolution feature with structured claim submission, evidence upload, and admin adjudication workflows — ensuring transparent conflict management across cross-border contracts.

● Implemented Stripe-powered payout infrastructure supporting multi-currency withdrawals, payout scheduling, and real-time transfer status tracking for global freelancers.

● Implemented secure webhook handling and transaction reconciliation pipelines, improving payment reliability and reducing failed transaction rates at scale.

Backend Developer — Sterling Bank sept 2023 –Dec 2024

● Built a FastAPI backend for the Plearnty quiz platform with JWT/OAuth2 authentication, role-based access control, and async database operations across PostgreSQL/MySQL with Alembic migrations.

● Implemented wallet creation and payment system with wallet-to-wallet and wallet-to-bank transfers, transaction PIN security, subscription billing integration, and payment history tracking.

● Developed Netflix-style multi-profile management allowing users to create and switch between multiple profiles

(Undergraduate, Professional, Prospective) with subscription management, exam type associations, and profile-specific analytics.

● Integrated Elasticsearch for centralised logging with structured JSON indexing and exception tracking; built high-performance leaderboards with optimised SQL queries and scheduled background jobs. Backend Engineer — MobiHealth Int'l Aug 2023 – Mar 2024

● Developed FastAPI backend services for a telemedicine platform, including doctor-patient scheduling, secure video consultation flows, and encrypted medical record management.

● Designed and implemented RBAC authentication/authorisation flows for doctors, patients, and admins — ensuring HIPAA-aligned access control.

● Built subscription and payment workflows for consultation plans, integrating payment gateways to support multi-region patient billing.

● Improved API response times for high-volume, multi-region requests through query optimisation, caching, and async processing.

Backend Engineer — Dukka May 2022 – Jun 2023

● Developed and maintained Dukka's digital bookkeeping and payments platform serving small businesses in emerging markets across Africa.

● Refactored a monolithic codebase into a microservices architecture, significantly improving scalability, deployment speed, and fault isolation.

● Built Dexter, an internal analytics web app used by stakeholders to monitor platform activity and drive data-informed decisions.

● Collaborated cross-functionally with product and engineering teams to design and ship features including expense tracking and a payment gateway.

Associate Software Engineer (Full Stack) — Decagon Institute Mar 2020 – Apr 2022

● Delivered two full-stack products — Closed Circuit (social enterprise funding platform) and Clean City

(environmental reporting app) — on time and within budget.

● Worked across backend and frontend stacks, collaborating with a globally distributed engineering team and product managers on end-to-end feature delivery.

Web Developer — Iriri Services Nig Ltd Mar 2019 – Jan 2020

● Contributed to web application development using HTML, CSS, JavaScript, and responsive UI design across multiple client projects.

EDUCATION

B.Sc. Biochemistry · Obafemi Awolowo University 2015 – 2019 KEY HIGHLIGHTS

● Built multi-currency payment flows on Stripe for international freelancers and businesses — removing traditional banking friction (PayPal/SWIFT limitations).

● Led the refactoring of a production monolith into microservices at Dukka, directly improving platform scalability for the African SMB market.

● Delivered secure, HIPAA-aligned telemedicine backend serving multi-region patient bases at MobiHealth.

● 5+ years of collaborative software delivery across cross-functional and distributed teams; strong async communication and self-management skills.

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