Daniel Joffe
Senior frontend engineer turned full-stack. I ship complete products — Next.js frontends, Python/FastAPI backends, Postgres, and the LLM pipelines in between.
WyrdFold
LiveAI-powered job-search product I built and run solo. Resume tailoring, job ingestion, match scoring — with the production LLM pipelines (versioned prompts, shadow runs, async observability) behind them.
10s → 2s Load Time
Reduced mobile load time from 10s to 2s at FightCamp.
80% Fewer Eng Requests
Decreased Content team's developer dependency by 80% at FightCamp.
200+ Pages in 2 Months
Increased campaign page launches to 200+ in 2 months at Winc.
80% Component Adoption
Built React component library adopted by 80% of apps at Internet Brands.
I've worked with these companies to build fast, beautiful, and inclusive digital experiences.
A Self-Serve Landing Page CMS at Winc
From 3 pages per week to 200+ in two months. Self-serve tooling eliminated the engineering bottleneck at Winc.
A React Component Library at Internet Brands
Built a React component library adopted by 80% of applications, then trained the team to own it.
Cutting FightCamp Mobile Load Time from 10s to 2s
Cut mobile load times from 10 seconds to 2 and dropped bounce rates by 39% at FightCamp.
I Audit Before I Build
At FightCamp, I found HD images and 800MB videos loading on every page. Lazy loading, srcset optimization, and bundle analysis cut bundle size by 62% and eliminated render-blocking on every page.
I Build for Autonomy
The best thing I can leave behind is a team that doesn't need me. I build CMS tooling that gets marketing off the engineering backlog, component libraries that new hires learn in a day, and documentation that outlives the person who wrote it. I invest in people the same way. Five developers I've mentored have gone on to promotions and dream jobs, including one now at JPL.
I Measure What Matters
Lighthouse scores, bounce rates, Core Web Vitals. I treat performance as a feature, not an afterthought. At FightCamp, systematic optimization lifted Lighthouse from ~35 to ~80 and cut mobile bounce rates by 39%.
I Think in Systems, Not Just Components
Building auth systems and rate limiters taught me to reason about tradeoffs: JWT vs sessions, in-memory vs distributed state, fail-open vs fail-closed. I bring that architectural thinking to every layer of the stack, not just the UI.
Building something that needs senior full-stack engineering?
Open to full-time roles with product-focused teams. If the frontend has to be excellent and you want one engineer who can own the whole stack, let's talk.