Hire a Fractional Frontend Engineer
Fractional Frontend Engineers. Interfaces That Ship.
Senior frontend engineering that builds fast, accessible, conversion-optimised interfaces — on a flexible engagement that slots directly into your existing team and workflow.
Why engineering teams choose Fractionus
- Vetted practitioners only. We shortlist experienced frontend engineers with production codebases and track records in your stack.
- Fast start. Typical kickoff in days — no lengthy technical assessments or agency scoping processes.
- Flexible engagement. 2–3 days/week, day rate or retainer, structured around your sprint and deployment cadence.
- Clear outcomes. Features shipped, performance benchmarks improved, and code your team can maintain.
What is a Fractional Frontend Engineer?
A Fractional Frontend Engineer is a senior developer who partners with your team part-time to own the client-side engineering of your product or platform. They sit comfortably in your codebase, contribute to architectural decisions, and ship production-quality code — without needing hand-holding or a lengthy ramp-up period.
Where they go deep
- React, Next.js, and modern JavaScript/TypeScript application development
- Vue.js and Nuxt for Vue-based architectures
- Shopify Liquid theme development and Shopify Plus customisation
- Headless commerce frontend (Hydrogen, Next Commerce)
- CSS architecture, design system implementation, and component libraries
- Performance optimisation (Core Web Vitals, bundle size, lazy loading)
- Accessibility (WCAG AA) and semantic HTML
- API integration and GraphQL/REST consumption
Fractional CSIO
Ex-SoundCloud
Fractional CRO
Ex-Heineken
Fractional CXO
Ex-McKinsey
Fractional GTM
Ex-Salesforce
Fractional Head of AI
Ex-GE Capital
Fractional COO
Ex-Glossier
Fractional CTO
Ex-Afterpay
Fractional CTO
Ex-Google
Fractional CPO
Ex-Pleo
Fractional CTO
Ex-BMW
Fractional CPO
Ex-Lego
Fractional CFO
Ex-We Are Brands
When to hire a Fractional Frontend Engineer
- Your UI backlog is growing faster than your team can ship it. A fractional frontend engineer makes consistent progress on the backlog without adding permanent headcount.
- You have a design system that nobody has time to build. Establishing a component library and design token system requires focused, senior engineering time — exactly what a fractional engagement provides.
- You’re launching a new product surface. New checkout flows, onboarding experiences, or marketing pages need frontend expertise that isn’t distracted by the rest of the product.
- Your site performance is hurting conversion. A fractional frontend engineer can diagnose and fix Core Web Vitals issues, page speed regressions, and Lighthouse failures that are quietly costing revenue.
What does engagement look like?
Most teams engage a fractional frontend engineer at 2–3 days per week, embedded into the sprint cycle and attending standups and planning sessions. Common formats: weekly sprint retainer or project-based for a defined build.
90-Day deliverables typically include
- Codebase audit and technical debt assessment
- Backlog triage and priority order by complexity and impact
- First sprint of production-shipped features
- Performance baseline and Core Web Vitals improvement targets
- Component library starter or design system contribution
- Code standards documentation and PR review process
Hire a Fractional Frontend Engineer
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Why the fractional model is surging
Experienced frontend engineers who combine deep framework knowledge with production discipline are genuinely hard to hire and expensive to retain. Most product teams don’t need that seniority five days a week — they need it reliably at the right moments. The fractional model makes that possible at a cost that makes commercial sense, without the six-month hiring lag of a full-time search.
How Fractionus works
- Brief us once. Your stack, current frontend challenges, sprint structure, and delivery goals.
- Shortlist in days. Meet 2–3 vetted fractional frontend engineers matched to your framework and codebase.
- You choose. Interview, check code samples, and select your engineer.
- We handle everything else. Paperwork, billing, and smooth scale-up/scale-down.
What you’ll get — and measure
- Features shipping to production consistently, tracked against sprint velocity
- Core Web Vitals scores improving with documented before/after benchmarks
- A component library or design system foundation your team can build on independently
- A cleaner codebase with documented patterns and fewer frontend bugs reaching production
Fractional leaders from top brands
Frequently Asked Questions
Answers to the most common questions about working with a Fractional Frontend Engineer through Fractionus
Do they work across both web apps and ecommerce storefronts?
Yes. Our network includes frontend engineers with depth in both SaaS product (React/Next.js) and ecommerce (Shopify Liquid, Hydrogen). We match based on your specific platform and requirements.
Will they write tests as well as feature code?
Most senior fractional engineers write unit and integration tests as a standard part of their process, not an afterthought. This should be confirmed at brief stage so expectations are aligned from day one.
How quickly can we start?
Most clients meet shortlists within a week and kick off within days after selection.
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