christoffer.maintz
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open to small freelance jobs · Aarhus, Denmark

About

Developer from Aarhus. Consultant in DevOps, automation and AI-assisted development, with a business-critical AI system behind me and a habit of building the tools I wish I had.

My CV →contact →
Portrait of Christoffer Maintz

I’m a developer in Aarhus who likes the unglamorous machinery that decides whether a team ships fast and safely: the pipeline, the gate, the tooling, the paved road. Lately that includes making AI coding agents genuinely useful without letting them quietly lower the bar.

During my internship at WEXO I built a generative-AI platform for Shopware 6 as sole developer. It enriches a 3,000+ product catalogue in four languages, has saved hundreds of hours of manual work, and is still business-critical today. I now work as a consultant on DevOps, automation and AI-assisted development, and build open-source developer tooling on the side: Foundry, a polyglot quality gate for AI-assisted development, and the jev-tools family.

Before software I spent six years in retail leadership, which taught me more about processes, people and prioritising under pressure than any course. Today I take on freelance work in AI automation, DevOps, developer experience and platform engineering.

Fun fact: I built my first website for my dad’s business when I was 13.

100sof hours of manual work saved at Illux
3,000+products enriched by AI in production
6+ yrsretail leadership before tech
29public repositories

01Values

  1. 01

    Understand before building

    I start with how people actually work and where the time goes. The most valuable fix is often not the one first asked for.

  2. 02

    Let evidence decide

    Tests and measurements over "it seems fine", and honest numbers over impressive ones.

  3. 03

    Leave it ownable

    Code, docs and a hand-over the team can run without me. If it only works while I’m around, it isn’t finished.

  4. 04

    Automate the boring, keep humans on the judgement

    AI and tooling should take repetitive work off people’s plates, with a person reviewing wherever the system isn’t sure.

02Experience

  1. Oct 2026 - present

    AI-Native Product Engineer

    Full-time AI-native product engineer.

  2. Jul 2026 - Oct 2026

    Consultant - DevOps, AI & Automation

    Consulting across DevOps, backend, CI/CD, developer experience, automation and AI-assisted development, taking independent technical ownership of concrete solutions across software, infrastructure and development workflows.

    • CI/CD pipelines from build to test, staging and production with automated quality gates, releases and deployments across environments (incl. Azure Pipelines).
    • Containerisation with Docker and Docker Compose; work on Kubernetes-related infrastructure; Azure (Functions, SQL), infrastructure as code, secrets management and reproducible environments.
    • Modernising legacy applications: framework and stack upgrades (incl. legacy Shopware), removing deprecated code and consolidating duplicated logic.
    • Developer experience: internal CLI tools, project scaffolding and reproducible local environments; linters, static analysis, tests, hooks, dependency and secret scanning moved as early in the flow as possible.
    • AI-assisted development: coding agents with custom skills and hooks, guardrails so agent changes are never accepted uncritically, and cost-aware model routing.
    • Mapping use cases and integrating AI into existing business processes to automate manual, repetitive work.
    • Azure Pipelines
    • Docker
    • Kubernetes
    • Azure
    • IaC
    • Shopware
    • Claude Code
  3. Aug 2025 - Jan 2026

    Software Developer / Backend Engineer (intern)

    Software-consultancy internship in a client context: production-ready backend services, integrations and automation for business-critical e-commerce systems, primarily the client Illux’s Shopware webshop.

    • Built Illux Product AI end to end as sole developer: a Shopware 6 plugin generating multilingual descriptions, SEO, categories and tags from product images via generative-AI APIs behind a provider-agnostic abstraction layer.
    • Eliminated manual enrichment for most of a 3,000+ product catalogue, saving hundreds of hours of manual work. Business-critical and still in daily use.
    • Asynchronous processing on Symfony Messenger + RabbitMQ with batching, retry with exponential backoff, idempotency, rate limiting and a full audit trail; configurable confidence model with human-in-the-loop approval.
    • Artwork visualisation: shoppers preview art in curated rooms or a photo of their own, composited per scene and streamed live over server-sent events.
    • Email template preview platform rendering transactional mail against real orders with client emulation, removing the need for manual test orders.
    • Contributed cost-aware model routing to an internal agentic coding harness (Python, LangChain).
    • PHP
    • Shopware 6
    • Symfony Messenger
    • RabbitMQ
    • TypeScript
    • Vue
    • SSE
    • GitLab CI
Earlier: retail leadership (2015-2023)
  1. May 2017 - Oct 2023

    Sales Lead (acting assistant store manager)

    Ran daily operations across day and evening shifts: staffing, delegation, employee development and process improvement. Led a waste-reduction initiative worth roughly DKK 1M to the bottom line in its first year.

  2. Oct 2015 - May 2017

    Assistant Store Manager

    Shared responsibility for daily operations, planning and staff coordination; onboarding and interviews.

03Education

  1. Aug 2023 - Jan 2026

    AP Degree in Computer Science (Datamatiker)

    Electives: Advanced Databases, iOS

  2. Aug 2021 - Jun 2023

    Higher Preparatory Examination (HF)

Courses: Leadership, Communication & Employee Development (Niels Holte Kurser, 2018) · Conflict Management (Butikskontrol Syd, 2017)

04Skills

  • GitHub Actions
  • GitLab CI
  • Azure Pipelines
  • Docker / Compose
  • Kubernetes
  • mise
  • Quality gates & ratcheting
  • Pre-commit / pre-push hooks
  • IaC / Config- / Policy-as-code
  • Secrets management
  • Internal CLI tools
  • Project scaffolding
  • Reproducible local environments
  • PR automation
  • Static analysis
  • Semgrep
  • gitleaks
  • osv-scanner
  • ESLint
  • Renovate
  • LLM / generative-AI integration
  • Schema-enforced structured output
  • Prompt engineering
  • Evaluation harnesses
  • RAG · embeddings · pgvector
  • Agentic coding (Claude Code skills & hooks)
  • Guardrails & confidence gating
  • Cost-aware model routing
  • MCP
  • LangChain
  • n8n
  • ASP.NET Core & MVC
  • Spring Boot
  • Quarkus
  • Symfony / Shopware 6
  • Node.js / Express
  • REST APIs
  • RabbitMQ
  • Symfony Messenger
  • Angular
  • React
  • Vue
  • Astro
  • SwiftUI
  • WPF
  • JavaFX
  • Azure (Functions, SQL)
  • Cloudflare
  • Serverless
  • PostgreSQL
  • MS SQL / T-SQL
  • MySQL
  • Oracle / PL-SQL
  • Redis
  • Firebase
  • Supabase
  • Flyway
  • C# / .NET
  • Java
  • PHP
  • TypeScript
  • JavaScript
  • Python
  • Kotlin
  • Swift
  • SQL
  • Shell
  • Hexagonal / clean architecture
  • Event-driven architecture
  • Modular monolith
  • Domain modelling
  • SOLID & GRASP
  • TDD
  • Code review
  • Scrum
  • Legacy modernisation

Spoken languages: Danish (Native) · English (Fluent)

christoffer@maintz.dev · Aarhus, Denmark · GitHub · LinkedIn

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