Ontario, Canada

Olusola Ajayi

Building scalable, user-centric systems.

A Senior Software, AI & Cloud Engineer with over a decade of experience building, deploying, and scaling production-grade software systems.

I design and build intelligent, event-driven, real-time, and distributed systems—from user-facing applications and AI-powered workflows to the cloud infrastructure that runs them. Experienced with AWS, Docker, Kubernetes, Terraform, Ansible, Monitoring, CI/CD, and cloud-native architectures, I focus on creating platforms that are scalable, resilient, observable, and cost-efficient.

I bring an end-to-end engineering mindset: translating product requirements into robust software, designing reliable architectures, integrating AI where it creates meaningful value, and automating the infrastructure and delivery pipelines required to run systems reliably in production.

View projectsGet in touch

Live Products

A few of production-grade products I have worked on

  • MAP GIS Mining - SaaS

    SymxAI Asset Tracking

    Designed and built real-time inventory (trucks and loaders on mine site) tracking on a live map with Geolocators, using CesiumJS, React, TypeScript, and short-polling in Node.js. This showed the location of each asset as well as its operational and engine statuses in real time.

    ReactResiumTypeScriptNode.jsPostgreSQLCesiumJSGeolocatorsShort-polling
  • Real-time analytics Mining - SaaS

    SymxAI inspection platform

    Web and Mobile Dashboards visualizing thousands of inspection records and field media; offline-first sync for mobile.

    ReactTypeScriptNode.jsPostgreSQLAWSCDKMicroservicesAthenaDynamoDBPostgresqlSequelizeReact NativeFlutter
  • Next.js migration Podcasting - SaaS

    Podopolo podcast platform

    Migrated frontend to Next.js for better performance and SEO; MongoDB to PostgreSQL for relational data.

    Next.jsReactPostgreSQLReact Native
  • MongoDB to PostgreSQL Podcasting - SaaS

    Podopolo podcast platform

    Migrated data architecture from MongoDB to PostgreSQL for complex relational queries.

    ReactNode.jsAWSDockerReact Native
  • Multi-tenant platform Fashion - e-Commerce

    The Fitting Room

    3D fitting room where buys can try clothes on in a virtual environment, using their 3D body scan tocheck size and fittings.

    ReactNode.jsThree.jsWebGLWebXR
  • Multi-tenant platform Energy - Fintech

    BuyPower electricity vending

    Solely designed and built a multi‑tenant electricity/water vending platform

    ReactNode.jsAWSDocker

Career

Where I have worked

  • SymxAI

    Apr 2023 — March 2026

    Ontario, Canada · full-time

    Senior Software Engineer

    • Lead development across frontend and backend for a real-time analytics platform processing inspection data and media.
    • Built React + TypeScript dashboards visualizing thousands of inspection records and field media assets.
    • Designed scalable APIs and backend services using Node.js and PostgreSQL.
    • Implemented offline-first sync for mobile clients; optimized queries, caching, and frontend performance.
    ReactTypeScriptNode.jsPostgreSQLAWSCesiumJSFlutterReact NativeCDKMicroservicesAthenaDynamoDBPostgresqlSequelize

  • Podopolo

    Jun 2021 — Dec 2022

    USA

    Senior Software Engineer

    • Led full-stack development for a content and podcast platform used by thousands of users.
    • Migrated frontend from React to Next.js for better performance and SEO.
    • Designed backend APIs for engagement, analytics, and content delivery.
    • Migrated data architecture from MongoDB to PostgreSQL for complex relational queries.
    Next.jsReactNode.jsPostgreSQLMongoDBAWS

  • BuyPower Inc.

    Mar 2020 — Dec 2020

    Nigeria

    Senior Software Engineer

    • Designed and built a multi-tenant electricity vending platform for utility token generation.
    • Implemented React interfaces for billing, payment workflows, and transaction monitoring.
    • Built Node.js backend APIs for token generation, billing, reconciliation, and payment integrations.
    • Managed deployment with Docker, Nginx, and AWS EC2.
    ReactNode.jsAWSDocker

  • Andela, EppMe Digitals, RCCG HQ, Placid Properties

    2008 — 2019

    Various

    Earlier Engineering Roles

    • Built and maintained full-stack applications using JavaScript, Node.js, PHP, Python, Ruby on Rails, MySQL, MongoDB, and PostgreSQL in Agile environments.
    JavaScriptNode.jsPythonPostgreSQLAgile

About

My Philosophy

I'm a senior full-stack engineer who believes the best software comes from understanding the problem deeply before writing code. Over eight years I've built real-time analytics platforms, content and podcast systems, multi-tenant fintech products, and industrial inspection tools — each time focusing on reliable APIs, performant UIs, and systems that support real-world workflows.

I care about clean abstractions, type safety, and shipping systems that scale. I'm most energized when owning systems end-to-end — from product requirements to production deployment — and working with teams that value both engineering depth and user impact.

Education

  • BSc Computer Science — Algoma University · Ontario, Canada
  • ND Electrical/Electronics Engineering — Osun State Polytechnic Iree · Nigeria

Certifications

  • AWS Certified Cloud Practitioner
  • Oracle Certified Java SE7 Associate & Professional

Contact

Let's build something worth using

Have a project in mind or want to connect? I'd love to hear from you.

ebenezerajayi@gmail.com+1 (249) 525-6115
GitHubLinkedIn

Ontario, Canada · Open to opportunities