Theo Archer

Senior Integration Engineer

I ship integrations that keep commerce moving.

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About

I'm a senior integration engineer with over a decade of experience, building Kafka and Spring Boot microservices on Kubernetes that move inventory, orders and loyalty data at scale for The Warehouse Group.

I'm comfortable bridging engineering and business, having spent years in customer-facing engineering and pre-sales earlier on. I do my best work on problems that need both solid engineering and clear communication.

Experience

  1. OCT 2024 – PRESENT

    Integration Engineer · The Warehouse Group

    Designed and built five Spring Boot microservices to replace legacy WSO2 order integrations, saving around $100k NZD a year in licensing and standing in for the tech lead on the migration. As sole developer, stabilised the Fulfilment team's Manhattan Active Omni integration, an estate of 30+ microservices and 30 Kafka Connect connectors, adding the logging, alerting and monitoring it had been missing. Also wrote a Claude Agent SDK skill that generates integration tests for Spring Boot services, cutting setup from days to minutes.

    • Java
    • Spring Boot
    • Kafka
    • Kubernetes
    • Docker
    • PostgreSQL
    • Claude Agent SDK
  2. DEC 2021 – OCT 2024

    Full Stack Developer · The Warehouse Group

    Made Salesforce Commerce Cloud back-end changes on thewarehouse.co.nz and noelleeming.co.nz to fix a long tail of slow cart and checkout load times, worst on large baskets. Built the integration behind a loyalty programme that now serves a million users, and introduced ship-to-store as a delivery option to shift purchases towards local stores.

    • JavaScript
    • TypeScript
    • Node.js
    • Jest
    • Salesforce Commerce Cloud
  3. FEB 2020 – DEC 2021

    eCommerce Personalisation Manager · The Warehouse Group

    Wrote the documentation and ran the training that scaled Dynamic Yield across the business, so 20 merchandisers could manage their own personalisation content. Built product recommendation features that won The Warehouse Group a 2021 Dynamic Yield Personalization Award.

    • Dynamic Yield
  4. MAY 2019 – FEB 2020

    eCommerce Personalisation Developer · The Warehouse Group

    Built personalised web experiences with Dynamic Yield and Salesforce Marketing Cloud. Set up tracking and analytics across web and email channels to support targeted advertising.

    • JavaScript
    • Dynamic Yield
    • Salesforce Marketing Cloud
  5. FEB 2017 – JUN 2018

    Implementation Manager · SLI Systems

    Managed implementations for 20+ clients including WHSmith and Iceland Foods. Also worked in pre-sales, helping the sales team win contracts by translating between the technical and business sides.

    • Sales Engineering
    • SaaS Implementation
    • Pre-Sales
  6. DEC 2014 – FEB 2017

    Client-Facing Engineer · SLI Systems

    Built SaaS search integrations for 50+ clients, including the data pipelines and web components on their eCommerce platforms.

    • JavaScript
    • Java
    • Data Pipelines
    • eCommerce

Education

  1. JAN 2010 – DEC 2013

    BSc Mathematics · University of Canterbury

    Other subjects: Computer Science, Economics