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.
Achievements
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.
Teams I've worked with
I've worked with these companies to build frontends that are fast, accessible, and genuinely good to use.
Featured Projects
WyrdFold: A Self-Hostable LLM Job-Search Platform
Scored ~44,000 job postings for $167 in LLM spend with a two-phase pipeline. A full-stack AI job-search platform I built and run solo.
API Performance: Pooling and Parallelism
Persistent browser pool, shared HTTP connections, parallelized DB operations, and JWT hardening across two FastAPI services.
Multi-ATS Job Pipeline: FastAPI Behind Next.js
Six-ATS job pipeline: FastAPI scraper, weighted scoring, Next.js admin dashboard, JWT cookie auth, auto-detect input, and 8-second scans.
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.
A React Component Library at Internet Brands
Built a React component library adopted by 80% of applications, then trained the team to own it.
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.
How I Think
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.
Senior full-stack engineering, frontend included.
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.