Dennis Marchand

Victoria, BC · jacquesporveau@gmail.com · linkedin.com/in/dennis-marchand-ba0060103 · escape-the-mud.dev

Senior Software Engineer with ~10 years of experience building product-critical features and platform infrastructure. Recently focused on AI-augmented engineering, shipping agentic tooling, LLM integrations, and evaluation frameworks that teams actually use. Strong TypeScript/React fundamentals with real fullstack depth across Ruby/Rails and Postgres. Known for leading complex cross-team initiatives and making the engineers around me better.

TypeScript · JavaScript · React · Ruby on Rails · Postgres · REST APIs · Claude API · MCP · Datadog · NewRelic · Sentry

Experience

Senior Software Engineer at Roofr

Jan 2023 – Present

• Led overhaul of permissions system from static to fully configurable, including custom user-defined roles; authored RFC reviewed by staff engineers, wrote technical direction doc, designed and sequenced implementation across the team
• Designed core permissions hook used as the primary interface for all teams interacting with the permission layer
• Built internal agentic grooming tool using Claude Code and Jira MCP, conversational and category-based with correct ADF formatting; adopted by the engineering team
• Developed AI evaluation framework for assessing candidate take-home assignments
• Ran internal knowledge-sharing session on AI-augmented workflows; multiple managers reported engineers changed how they work as a result
• Built core activation features including automations and the job board
• Contributed to design system primitives and developer experience tooling

Senior Software Engineer at Productboard

Mar 2022 – Dec 2022

• Senior engineer on Customer Board, a major feature for visualizing and organizing customer feedback at scale
• Led planning, estimation, and development sequencing; wrote significant portion of shipped code
• Part of a Canada-wide layoff in December 2022

Software Developer at Lightspeed Commerce

Oct 2020 – Feb 2022

• Built Order Ahead, a contactless food ordering platform during COVID-era demand spike, shipping QR code generation, admin tools, and order scheduling
• Cut end-to-end test execution time by 72% in the Payments org
• Took on Scrum Master responsibilities and drove early research that helped lay the foundation for Lightspeed Capital

Software Developer at JUUL Labs

Feb 2017 – Jun 2020

• Built and maintained B2B digital storefronts connecting JUUL with wholesale purchasers; joined through acquihire of a boutique consultancy
• Led development of a wholesale-specific e-commerce storefront and rewrote the store locator in modern JavaScript, significantly increasing test coverage

Mentor at Lighthouse Labs (part-time)

Mar 2017 – Mar 2020

• Mentored bootcamp students across weekly shifts, providing technical guidance on TDD, Agile workflows, and mock technical interviews