J.M. Janzen

Canada | work@jmjanzen.com | https://jmjanzen.com

SUMMARY
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Polyglot developer with 9+ years of experience across the full stack, with strong emphasis in
backend development and empowering internal users with self-service tools. Passionate about
learning new technologies, making friends, and min-maxing my Linux terminal flow.

Aside from work, I also enjoy honing my DSL skills on LeetCode, taking courses to deepen my
expertise (presently following a Certified Kubernetes Admin course), and playing with my various
servers and websites (currently turning myself (https://api.jmjanzen.com/me/1) into an API! Beep boop!).

SKILLS
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● Primary languages:
    ○ TypeScript, NodeJS, Python, Ruby, Bash, Go, C++11, Java SE 11.
● Some other tools:
    ○ Linux, Git, Docker, Kubernetes, Terraform, Kafka, AWS, GCP, No/SQL, vim.
    ○ CI/CD (various), microservices, deconstructing and maintaining monoliths.
    ○ HTML5/CSS3+, ReactJS, NextJS, NestJS, Nx, NPM, Gulp, webpack.
● Outlook on software engineering:
    ○ Evangelist for internal data and process democratisation, DevOps culture, and
      mindful left-shifting / self-serve support.
    ○ I love mentoring and helping people feel valued, welcome, and useful.

WORK EXPERIENCE
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Senior Freelance Developer | Freelance | Canada (remote) 2025 - present

    ● Part time subcontracting, full time learning and building fun things.

Senior Platform Engineer | Tempo Software | Canada (remote) 2023 - 2024

    ● Migrated tech stacks to monorepos on GitHub, reducing tech debt and enhancing
      developer experience (TypeScript, Bash, GitHub Actions, etc).
    ● Created and improved developer tooling to further reduce friction, increasing developer
      joy and velocity.
    ● Unified feature flag solutions with product teams, ensuring zero functionality loss.
    ● Managed NodeJS version upgrades across 5 services with zero downtime (long tailed,
      many cross dependencies).
    ● Benchmarked (ApacheBench) compression algorithms (Zopfli, Brotli, etc) in various
      configurations, moved out of middleware (ExpressJS) and into a reverse proxy (Nginx)
      defined in IaC (Terraform).

Software Engineer II | Ratehub | Canada (remote) 2018 - 2023

    ● Developed a suite of OpenFaaS integrations (NodeJS, Kafka, MongoDB) to interact with
      Salesforce and Twilio APIs based on customer signals.
    ● Personally set up the marketing infrastructure for acquisitions, including secure data
      migration pipelines.
    ● Integrated many data sources with integrations for email/SMS marketing of 200k+
      subscribers, not including transactional communication (eg. confirmations, notifications,
      magic links).
    ● Developed a Python CLI for marketing integrations.
    ● Developed a Ruby CLI for critical ETL processes.
    ● Built internal web apps to enable non-technical users to manage data and automation
      needs (these wrapped the CLIs).
    ● Responsible for migration to Salesforce, using API shims for data transformation.

Software Developer | Tire Wizard | Pickering, ON (hybrid) 2016 - 2018

    ● Orchestrated data for B2B/B2C frontend, contributing to full-stack development.
    ● Developed a Python CLI for scalable ETL automation (via VirtualBox).
    ● Migrated tooling from legacy Python to 3.x.

Software Developer | Sparq Systems | Kingston, ON (on-site) 2015 - 2016

    ● Developed features across front-end and back-end in an embedded stack.
    ● Created a NodeJS CLI for firmware updates on remote microcontroller units, including a
      user-friendly web interface.

RELEVANT EDUCATION
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Computer Programmer Analyst | St. Lawrence College | Kingston, ON (on-site) 2013-2016

    ● Good basics; some history; excellent co-op placement and people.
    ● C++, Java, linux, z/OS, TSO/ISPF, COBOL, JCL, CICS, QA,  Flash, System Analysis & Design,
      Database & Web Services, Enterprise Web Development, Web Services.

SOME OTHER INTERESTS
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I *love* Doom (1993 onward). Modding it is where I caught the programming bug.
Presently reading 60s social sci-fi, mastering seitan, and writing hopepunk.