Stellan Muller-Cohn

Software Developer

Highly motivated self-starter with 6+ years of experience in test automation and internal Full Stack web services. Interested in customer-focused Full Stack, Backend and DevOps roles.

Work

Senior Software Engineer in Test

– Present

Software engineer focused on building Backend test infrastructure for continuous integration of on-instrument software. Promoted to Senior Software Engineer in 2024.

  • Implemented and maintained automation for formal verification and continuous testing of on-instrument software using Python and C#

  • Designed and implemented replacement for manual test agent configuration management process with automated Ansible-based solution

  • Developed authentication and data management features for an internal web-based data visualization service using the Dash(Python) Full Stack framework

  • Managed deployments of an internal web-based data visualization service and the required reverse-proxy and cache services

Software Engineer - Contract

–

Contract software engineer responsible for delivering customer and employee facing web and mobile features in support of Covid testing operations.

  • Designed and implemented reporting of Covid testing site demographic data using Google Firebase and ReactJS with Typescript

  • Added functionality for employee Covid testing intake iOS application using Swift

  • Setup integration tests utilizing production-like Frontend and Backend deployments

Python Test Engineer

HP
–

Software engineer focused on building and maintaining Python-based automation systems and internal tooling to support quality and release confidence for a large-scale consumer mobile application.

  • Maintained and implemented test automation and framework features for testing of a large-scale consumer mobile-application on both Android and iOS

  • Built an internal data processing tool to collect and format nightly test results for the QA team

Automation Engineer

–

Automation engineer supporting internal IT and identity systems by building and maintaining tooling for employee lifecycle management, authentication, and platform migrations.

  • Designed and maintained system for managing employee lifecycle using ServiceNow

  • Automated migration of employee accounts from legacy to new systems

  • Stood up and maintained Okta instance

  • Assisted team with one-off PowerShell scripts

Projects

RPiPWMFanControl

A temperature based fan control daemon for raspberry pi using hardware PWM for efficiency.

  • Implemented hardware based PWM fan speed control with temperature-based control system

  • Designed and implemented git-tag-based build and deployment system for go binaries using GitHub Actions

  • Created cli interface for configuration of service using go flags

ServerPartDealsTable

A web app that displays storage media from serverpartdeals.com in an easily sortable and filterable view.

  • Reverse engineered and implemented a client for serverpartdeals.com's product data api

  • Created searchable table view of serverpartdeals.com's product data using Svelte

  • Setup automated deployment of application to Github pages using Github Actions

Skills

Languages & Frameworks

  • Python
  • TypeScript
  • Go
  • C#
  • React
  • Svelte
  • FastAPI
  • Plotly Dash

Systems & Infrastructure

  • Docker
  • Linux
  • CI/CD pipelines
  • GitHub Actions
  • Ansible
  • Bash
  • AWS

Platforms & Tools

  • Google Firebase
  • Okta
  • ServiceNow

Interests

Guitar

Surfing

Programming

Animals