Olayinka Olawale

Senior Backend Engineer & Tech Lead - Munchory - Abuja, Nigeria (Hybrid)

(2025-10)

Architected multi-tenant Node.js/NestJS backend for a food delivery platform, designing scalable service layers supporting concurrent home-cooked meal bookings, chef scheduling, and multi-vendor management.
Built real-time logistics engine with WebSocket-driven GPS tracking and SLA-compliant delivery status updates, enabling express and instant order flows across distributed rider networks.
Engineered a subscription scheduling service for recurring weekly meal plans with queue management, conflict resolution logic, and advance delivery booking.
Implemented role-based access control (RBAC) system with secure vendor dashboards, enabling verified chefs to manage orders, menus, and compliance certifications.
Designed AI-driven personalisation module in Node.js leveraging user history data to generate meal recommendations, directly increasing user retention potential.

Backend & Cloud Engineer - SalesGroup - Remote (Contract)

(2025-12 - 2026-02)

Led Node.js backend migration from monolithic architecture to distributed microservices on GCP, improving fault tolerance, horizontal scalability, and deployment independence across services.
Containerised services using Docker and Kubernetes, designing inter-service API gateway patterns and communication contracts between decoupled backend services.
Optimised cloud resource allocation, reducing infrastructure costs while maintaining high-availability SLAs across high-traffic periods.

Blockchain Backend Engineer - Buildorz - Remote

(2023-09 - 2026-04)

Built Node.js and AWS cross-chain backend infrastructure optimising transaction throughput for decentralised applications, reducing processing latency by 70% through code optimisation and targeted database indexing.
Conducted rigorous Solidity smart contract security audits across ERC-20 token contracts and DeFi protocols, achieving a 100% fund safety record across all deployed contracts.
Designed and maintained backend APIs integrating Web3.js and Ethers.js for on-chain interactions, wallet connections, and ERC-20/ERC-721 token operations on Ethereum and EVM-compatible chains.
Mentored cross-functional engineering team, increasing team velocity by 25% through structured code review, pair programming, and knowledge-sharing sessions.

Backend Engineer - MyCareAssistant - Remote

(2024-01 - 2025-03)

Owned end-to-end Node.js and PostgreSQL backend architecture for a healthcare platform, ensuring HIPAA-aligned data integrity and secure patient record management at scale.
Engineered Redis caching strategies that reduced API load times by 45%, significantly improving mobile subscriber experience and server throughput.
Enforced authentication, authorisation, and encryption protocols protecting sensitive user health data to industry compliance standards.

Freelance Backend & Web Developer - Olinkstech Ltd - Abuja, Nigeria

(2021-01 - 2023-12)

Delivered bespoke PHP-based school management portals for educational institutions, covering student registration, result processing, fee management, and academic session administration.
Built custom content management systems (CMS) and administrative portals for clients across education and SME sectors, enabling non-technical staff to manage digital content independently.
Developed multi-role management portals with staff, admin, and parent dashboards, integrating authentication, reporting pipelines, and data export features.
Maintained full project lifecycle ownership from requirements gathering and architecture through deployment and client handover, consistently delivering on time and within budget.

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