Hey, I'm

Dayton Johnson.

I make software.

Senior engineer at HubSpot in Commerce, owning core frontend architecture across line items, products, and pricing. On the side, I build two SaaS products as sole engineer: Posing Perfect and Career Iterator. I move fast and go deep.

See my workGet in touch

About

I make software. Production SaaS, complex frontend systems at scale, and everything in between.

By day I'm a senior engineer at HubSpot in the Commerce org. I own architecture, cross-team coordination, and delivery across complex, large-scale frontend systems. I write RFCs, take ownership seriously, and care a lot about the systems I leave behind.

On the side, I'm building two SaaS products from scratch as sole engineer: Posing Perfect, a platform for bodybuilding coaches and athletes, and Career Iterator, an AI-powered career management tool.

  • ▸Self-taught from the start
  • ▸Comfortable going deep on things I don't know yet
  • ▸Dabbles in embedded synthesizer development
  • ▸Competed in Men's Physique bodybuilding (Top 3 in debut)
  • ▸Open to senior remote roles

Experience

Senior Software Engineer, Commerce Platform @ HubSpot

Aug 2022 – Present

  • ▸Senior engineer in HubSpot's Commerce org, owning frontend architecture across a large multi-repo system spanning pricing, line items, discounts, and product bundles.
  • ▸Led end-to-end delivery of tiered pricing across a complex multi-repo system, driving architectural decisions, resolving dependency challenges, and coordinating across teams to ship at scale.
  • ▸Independently designed and built the Bundle Item Edit Panel, owning state management architecture, product logic, and multicurrency integration.
  • ▸Served as frontend DRI for Discount Codes Enhancements, owning requirements alignment with backend and full implementation independently.
  • ▸Drove Line Item Field-Level Permissions to rollout under critical production conditions, coordinating across multiple teams and frontend surfaces.
  • ▸Authored RFCs, technical explainers, and cross-team planning artifacts.

Projects

In development

Posing Perfect

A full-stack platform for bodybuilding coaches and athletes.

Built around a problem I ran into firsthand: preparing for my debut Men's Physique competition. I own everything: product, system architecture, backend (Supabase/PostgreSQL), frontend (Next.js/React), auth, testing (Cypress), and deployment (Vercel).

Next.jsTypeScriptSupabasePostgreSQLCypressVercel
In development

Career Iterator

An AI-powered career management tool.

Built as sole engineer. A tool for taking a deliberate approach to career growth: tracking what you've done, identifying where to go next, and making progress concrete.

TypeScriptReactHono

Skills

Languages

TypeScriptJavaScriptHTMLCSSSQL

Frontend

ReactNext.jsReact Native

Backend & Infra

Node.jsPostgreSQLSupabaseRESTGraphQLDocker

Tooling & Process

CypressSystem DesignGitGitHubLinear

Contact

Let's work together.

I'm open to senior engineering roles, interesting consulting engagements, and conversations with other builders. If you've got something worth talking about, reach out.