Theo Archer

Integration Engineer

I ship integrations that keep commerce moving.

About

I'm an integration engineer at The Warehouse Group, building Kafka-based microservices on Kubernetes that move inventory, orders, and loyalty data at scale. Before going deep on engineering I spent years in client-facing roles — onboarding enterprise clients, supporting pre-sales, and leading small teams. I still present quarterly tech reviews to 100+ stakeholders. I do my best work on problems that need both technical rigour and clear communication.

Experience

  1. OCT 2024 — PRESENT

    Integration Engineer · The Warehouse Group

    Built a Kafka/Spring Boot microservice processing 320k inventory records per hour. Played a senior role in migrating legacy WSO2 integrations to Spring Boot — acting as deputy to the tech lead, contributing to architecture decisions, reviewing pull requests for contractors and internal team members, and delivering $100k NZD in annual licensing savings. Also consolidated six services into one, simplifying maintenance and clearing out a long tail of bugs. Built an automated test suite to replace manual QA processes. Improved observability across order management with Kibana and New Relic. Present quarterly tech reviews to 100+ stakeholders.

    • Java
    • Spring Boot
    • Kafka
    • Azure API Manager
    • Docker
    • Kubernetes
    • CI/CD
  2. DEC 2021 — OCT 2024

    Full Stack Developer · The Warehouse Group

    Cut cart and checkout response times by over 50% on thewarehouse.co.nz and noelleeming.co.nz. Built the Salesforce Commerce Cloud integration for a loyalty program that now serves a million users. Introduced ship-to-store as a delivery option to shift purchases toward local stores.

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

    eCommerce Personalisation Manager · The Warehouse Group

    Created documentation and ran training to scale Dynamic Yield adoption across the business, enabling 20 merchandisers to manage their own personalisation content. Helped build the product recommendation features that won a customer experience award.

    • Dynamic Yield
    • Salesforce Marketing Cloud
  4. MAY 2019 — FEB 2020

    eCommerce Personalisation Developer · The Warehouse Group

    Implemented tracking and analytics across web and email channels, improving targeted advertising ROI. Built personalised web experiences using Dynamic Yield and Salesforce Marketing Cloud.

    • JavaScript
    • Dynamic Yield
    • Salesforce Marketing Cloud
  5. JUN 2018 — MAY 2019

    Backpacking Europe & SEA · Career Break

    Travelling solo around Europe and South East Asia

  6. FEB 2017 — JUN 2018

    Implementation Manager · SLI Systems

    Managed implementations for 20+ clients including WHSmith and Iceland Foods. Spent a lot of time in pre-sales too, helping the commercial team win contracts by bridging the technical and business sides.

    • Sales Engineering
    • SaaS Implementation
    • Pre-Sales
  7. DEC 2014 — FEB 2017

    Client-Facing Engineer · SLI Systems

    Implemented SaaS search integrations for 50+ clients, building data pipelines and web components across eCommerce platforms.

    • JavaScript
    • Java
    • Data Pipelines
    • eCommerce

Education

  1. JAN 2010 — DEC 2013

    BSc Mathematics · University of Canterbury

    Other subjects: Computer Science, Economics