Mark Ellis
Senior Software Engineer at Grubhub
Chicago, Illinois, United States
Summary
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Senior🎓
Top SchoolMark Ellis is a Senior Software Engineer with 12 years of experience building scalable full-stack systems across startups and large enterprises, currently contributing to Grubhub from Chicago. He has a strong track record modernizing complex workflows and infrastructure—migrating email-based messaging to real-time platforms at Indeed, improving API latency at Niantic, and boosting Lighthouse performance and SEO at DraftKings. Comfortable across React, TypeScript, Kotlin, Spring Boot, Node.js, Kafka, GraphQL and cloud-native stacks, he often leads cross-team initiatives and on-call incidents to restore production reliability. Mark pairs product-minded front-end craftsmanship with backend systems thinking, having driven measurable business outcomes like a 13% conversion increase and large reductions in delivery lead time. He also brings a communications and design background (BA in English and prior design/marketing leadership), which helps him bridge product, UX, and engineering effectively. Outside core engineering, he’s authored tooling (a popular VS Code RDF extension) and emphasizes developer experience improvements like automated linting and faster build pipelines.
11 years of coding experience
16 years of employment as a software developer
Bachelor of Arts English, Bachelor of Arts English at University of HoustonFull Stack Software Engineering, Full Stack Software Engineering at Hack ReactorWestside High School
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (93)
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Programming languages (9)
Github contributions (5)
ellismarkf/mfellis.com
Jul 2017 - Feb 2025
Contributions:67 pushes, 3 branches in 7 years 8 months
ellismarkf/minesweeper
May 2017 - Jun 2022
classic minesweeper with a multiplayer twist
Contributions:102 PRs, 78 pushes, 97 branches in 5 years 2 months
reactgamegamesminesweepertwist
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