Oluwatimileyin Oyeti Fullstack Developer
Profile

Fullstack engineer with 5+ years building production systems, now focused on technical support for developer tooling. Experienced debugging complex issues across APIs, real-time infrastructure, and AI integrations, and communicating solutions clearly to both technical and non-technical users. Passionate about making developer tools work better through fast issue resolution, solid documentation, and automation.

Work Experience

Fullstack Developer

Rawura
Dec 2025 – Apr 2026
  • •Architected and debugged a distributed microservices system (5 services: Main API, Event Bus, WebSocket Gateway, Admin, Storefront) using Node.js, TypeScript, Express, and Next.js 15.
  • •Resolving complex cross-service failures and ensuring 99%+ uptime across 500+ daily transactions processed via RabbitMQ event-driven architecture.
  • •Designed and optimized RESTful APIs with Express.js and TypeScript, implementing role-based access control (RBAC) and MongoDB schema indexing strategies that reduced complex query response times by 35%. All diagnosed through systematic profiling and load testing.
  • •Built and maintained real-time WebSocket infrastructure with Socket.IO⁠ (intelligent 300ms batching), supporting 1,000+ concurrent users; diagnosed latency bottlenecks and reduced unnecessary API calls by 30% through state management improvements using TanStack React Query and Zustand.
  • •Developed internal tooling and analytics dashboards using Next.js 15, React 19, and the MongoDB aggregation framework; built dynamic pricing, coupon, and notification systems with advanced server-side prefetching, achieving 90+ Lighthouse performance scores.
  • •Authored technical documentation and internal knowledge bases for microservices architecture, API contracts, and onboarding workflows, enabling faster debugging and cross-team alignment.

    • Fullstack Developer

    Remote Worldwide
    Jan 2024 – present
  • •Diagnosed and resolved complex backend issues across a remote job board platform (2,000+ active users), debugging API performance regressions and data integrity issues using systematic root-cause analysis with Node.js, TypeScript, Prisma, and MongoDB.
  • •Designed and implemented automated monitoring and health-check systems, achieving 99.9% system availability by proactively detecting and resolving production incidents before user impact.
  • •Built and maintained end-to-end, integration, and unit test suites using Cypress and Jest, improving system reliability by 35% and establishing a repeatable debugging workflow for identifying regressions.
  • •Integrated Redis caching to resolve throughput bottlenecks, scaling the platform to reliably support 6,000+ monthly users. Identified via performance profiling and resolved through targeted architectural changes.
  • •Designed and deployed internal automation scripts and workflows to streamline developer operations, reducing manual overhead and improving team productivity.

    • Fullstack Developer - Team Lead

    Hypercho
    Apr 2022 – Sep 2023
  • •Led backend architecture design and debugging practices for a cross-functional engineering team, implementing message queues for API load management and resolving critical production issues, hence reducing post-launch defects by 40%.
  • •Improved authentication security and system reliability through systematic code reviews, debugging sessions, and architectural refactoring of Node.js services.
  • •Mentored developers on debugging methodologies, backend best practices, and system design patterns, establishing a culture of technical rigor and knowledge sharing.
  • •Maintained and expanded internal technical documentation, improving onboarding speed and enabling the team to self-resolve recurring issues without escalation.

    • Software Developer

    Freelance
    Feb 2020 – Apr 2024
  • •Built and integrated AI-powered features using OpenAI and LangChain into production web applications with React and Next.js — including automation workflows using n8n and Make, debugging integration issues across LLM APIs and third-party services.
  • •Diagnosed and resolved cross-browser compatibility and responsive design bugs across multiple client projects, delivering pixel-perfect implementations from UI/​UX designs.
  • •Contributed to open-source tooling (Storybook.js) and migrated client platforms to modern CMS solutions (Sanity, HubSpot), implementing structured data markup that improved SEO performance.
  • •Communicated complex technical concepts clearly to non-technical clients and cross-functional stakeholders throughout project lifecycles, ensuring alignment on deliverables and timelines.
    • Skills
    Programming Languages — Typescript, JavaScript, HTML, CSS, SCSS, Python, GraphQL, SQL,Tact.
    Frameworks — Fastify, Express, NextJs, React, Redux
    Database — MongoDB, PlanetScale, Redis, Big Data
    Cloud Platforms — AWS, GCP, Koyeb, Render, Railway
    Payment Gateway — Stripe, PayPal, Paystack
    Version Control — Git, GitHub
    Others — Tailwind CSS, Storybook, Cypress, Jest, Microservices, NodeJS,Clojure, CI/CD pipelines, n8n, make.com
    Soft Skills — Collaboration, Time Management, Communication, Active Listening, Problem-solving, Technical documentation
    Support & tooling — Technical documentation, knowledge base authoring, Ticket triage, Slack support, CI/CD
    Education

    Computer Science

    Federal University of Technology
    Akure