Calvin Ellis

<CalvinEllisrole="" />

About me

Principal Software Engineer

Full Stack

calvin-ellis-ma calvin@calvinellis.io Cellis9421

15+ YOE in Software Engineering

Full Stack SWE: FE / BE / DevOps

AI Enablement & Agentic Workflow Specialist

Greater Boston · Open to Opportunities

Hobbies: Hiking, Gaming, and Building PCs

Hi there! 👋

I'm Calvin Ellis, a Software Engineer and technical leader with over 15 years of experience, currently specializing in agentic solutions—helping teams ship faster and smarter with AI-augmented workflows.

My experience spans cybersecurity education (Principal at Cybrary), high-growth e-commerce (Lead at Stove & Grill Parts), and contract work with SMBs. I've led engineering strategy, mentored engineers at every level, and run company-wide AI Enablement training so teams can leverage GenTech and agentic coding tools in their day-to-day.

I care a lot about developer experience and velocity: I've run 1:1 agentic coding sessions, documented hundreds of workflows and systems for better agentic understanding of our codebases, and helped engineers find where AI can meaningfully improve how they build. I also love mentoring—from interns to senior folks—and designing systems that scale.

Tech-wise, I work across the stack: Next.js, React, TypeScript, Go, Python, Java, and a long list of cloud and DevOps tools. I'm based near Boston and always up for talking shop.

Let's build something great.

cellis9421linkedin.com/in/calvin-ellis-ma

Work History

Roles and impact over the last 15+ years.

Principal Software Engineer

Cybrary (Cybersecurity Education-as-a-Service)

September 2022 → February 2026 | Remote | Washington D.C.

Rewrote marketing website (Next.js, TS, ISR/SSR, Vercel, Tailwind)
Rewrote core application (Next.js, TS, Vercel, MaterialUI)
Multi-tenancy, Configurable RBAC, MSW Demos, Cursor rules
Organized and led company-wide 'AI Enablement' training sessions
Documented hundreds of workflows and systems, resulting in faster onboarding and better agentic understanding of our code (Confluence, Miro, READMEs)
Managed/Maintained a cloud-based complex virtual lab environment (CLAB)
Orchestrated cross-team projects - often acted as a TPM (JIRA, Trello)
Trained engineers on team/org with 1:1 agentic coding sessions, helping them find where AI can improve DX and velocity
Mentored interns, helping them complete required work and personal goals

Lead Software Engineer

Stove & Grill Parts for Less (E-commerce)

January 2017 → September 2022 | Remote | Cataumet, MA

Lead engineering strategy/team, growing revenue from $1M ARR → $10M ARR
Rewrote core e-commerce site (Shopify CMS, Liquid, JS) with WCAG 2.2 AA accessibility and better IA / design for the industry
Built sync services to move our catalog, inventory, and sales data between sales channels (Shopify, Amazon, Walmart, eBay, Etsy, Google)
Built a report / diagnostic server to provide critical insights into the business
Optimized third-party tools, significantly enhancing the security, reliability, and cost-efficiency. (Fulfillment, IMS, Marketing)
Implemented CI/CD pipelines for automated deployments of all services and sites (GitHub Actions)
Helped orchestrate engineering, marketing, and customer success efforts.
Mentored engineers of all skill levels through rapid growth.

Contract Software Engineer

Independent (SMB Websites / Systems)

May 2012 → January 2017 | Plymouth, MA

Built custom CMS platforms and marketing automation tools for small businesses, streamlining internal reporting, task management, and customer engagement.
Built web applications to improve operational efficiency, integrating CRMs and analytics dashboards based on client-specific needs.
Worked with clients to find technologies and tools that cost-effectively empower small businesses.

Game Bot Developer

Independent (Game Bot Development)

January 2009 → May 2012

Built AI bots in Java that automated gameplay and completed complex tasks across multiple video games.
Used reflection and injection techniques to run scripts on top of or inside native game clients.
Designed workflows that consumed external APIs to drive bot behavior and in-game actions.
Developed complex scripts in Java to orchestrate multi-step tasks and objectives within game environments.
Focused on Java-based tooling, API integration, and script orchestration for automated in-game completion of varied tasks.

My Philosophy on Agentic Development

A practical guide to software development enablement with AI and agentic workflows.

Read my guide