Stellan Muller-Cohn

Software Developer

Highly motivated self-starter with 5+ 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

– Present

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

– Present

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