Abdulsamad Osunlana in a black T-shirt

Abdulsamad Osunlana

Senior Software Engineer / Founder, Upsert Labs

Abdulsamad Osunlana in a black T-shirt, studio portrait

I’m Abdulsamad, a Senior Software Engineer in Lagos. I studied Applied Geophysics (BSc, University of Ilorin, and MSc, University of Ibadan), and I’ve built software since 2019.

The work I like best has real money and real people behind it. A buyer who must never be charged twice. A shop that must keep selling when the network drops. A merchant whose store must stay up when another one falls over. I design for those failures first, and I prove the guarantees with tests.

Experience

  1. Aspen PublishingMay 2025 to present

    Foundational services for internal teams and third party integrations on Azure and .NET. I review code across teams for standards, security and performance, lead design discussions, and enforce unit, acceptance and integration test coverage.

  2. Aspen PublishingJun 2024 to May 2025

    Azure and ASP.NET Web API services, built to The Standard.

  3. Upsert LabsJun 2026 to present

    My own company. EventHome, Upsert, Upsert Scout and client builds such as Inkz ’N’ Paint.

  4. Open source, The StandardMar 2024 to present

    EventHighway, the RESTFulSense client rewrite, ADotNet and The Standard book, reviewed in public by the maintainers.

  5. AXA MansardJan 2023 to Jul 2024

    .NET services and acceptance testing.

  6. AIpidataNov 2022 to Apr 2023

    Designed and helped build PI-Pet, a pet tracking app for health vitals and location.

  7. BUNKR EssentialsMay 2021 to Sep 2022
  8. SolversBayFeb 2019 to Jun 2020

Stack

C# and .NET, ASP.NET Core, EF Core, PostgreSQL, Azure. TypeScript, Next.js and React. Paystack, webhooks and ledgers. Docker and Coolify. Flutter for mobile. Tested with xUnit, Vitest and Playwright.