Software Engineer (Full Stack) - Platform Performance

Posted 9 Days Ago
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London, Greater London, England
2-4
Mid level
Information Technology • Software
The Role
As a Full-Stack Software Engineer, you'll optimize performance across frontend and backend systems, create reusable UI components, and collaborate with teams to improve user experience.
Summary Generated by Built In

Description

We’re looking for a Full-Stack Software Engineer (2–4 years experience) to join our Platform Performance team and help us deliver lightning-fast, scalable experiences to millions of users around the world.

In this role, you’ll work across the stack—sharpening frontend speed, optimizing backend services, and making our user interfaces more responsive, reliable, and delightful to use. You’ll collaborate with passionate engineers and product managers to identify performance bottlenecks, contribute to architectural improvements, and help evolve our design system.

This is a fantastic opportunity for an ambitious engineer looking to build their skills in a fast-paced environment and make a meaningful impact at scale.
Freelancer.com is the world's largest freelancing and crowdsourcing marketplace, connecting over 80 million users across 247 countries, regions, and territories. Our platform enables businesses, entrepreneurs, and individuals to collaborate with skilled professionals from anywhere in the world, turning ideas into reality faster than ever before.

Our mission is bold: to create one billion jobs globally by empowering people to work for themselves and build sustainable careers online. Every feature we ship and every performance improvement we make brings us one step closer to enabling opportunity at an unprecedented scale.

What You’ll Do

  • Identify and solve performance issues across both frontend (Angular) and backend (PHP, Python, Go).
  • Optimize page load speed, rendering performance, and API response times.
  • Contribute to our design system and build reusable UI components using Angular and TypeScript.
  • Help maintain and evolve scalable backend systems for high-performance APIs.
  • Collaborate with cross-functional teams to implement best practices in performance, usability, and accessibility.
  • Participate in architecture discussions and continuously improve our codebase and tooling.
  • Promote and support performance monitoring and testing practices.

What We’re Looking For

  • 2–4 years of professional experience as a full-stack or frontend engineer.
  • Solid experience with Angular and TypeScript.
  • Comfort working with backend technologies like PHP, Python, or Go.
  • A good understanding of frontend performance optimization techniques.
  • Familiarity with RESTful API design and backend performance considerations.
  • Experience building and maintaining reusable UI components.
  • Exposure to design systems or component libraries.
  • Strong communication skills and a collaborative mindset.
  • A proactive attitude, with the ability to take ownership and see tasks through.

Bonus Points (Nice to have)

  • Understanding of accessibility and UI/UX design principles.
  • Familiarity with SEO and frontend performance metrics.
  • Experience with automated testing (Jest, Cypress, PHPUnit, etc.).
  • CI/CD or DevOps knowledge.
  • Open-source contributions or personal projects.

Why Join us

  • Work on a platform with global impact—we’re on a mission to create one billion jobs.
  • A culture that values ownership, transparency, and meritocracy.
  • Fast-track your growth with mentorship, real ownership, and exposure to internet-scale challenges.
  • Weekly CEO town halls, quarterly hackathons, and team events to keep you engaged and inspired.
  • A chance to help build the tools and systems that power the next generation of our platform.

Top Skills

Angular
Cypress
Go
Jest
PHP
Phpunit
Python
Restful Apis
Typescript
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The Company
HQ: Sydney, NSW
77,339 Employees
On-site Workplace
Year Founded: 2009

What We Do

Twelve-time Webby award-winning Freelancer.com is the world’s largest freelancing and crowdsourcing marketplace by total number of users and projects posted. More than 58 million registered users have posted over 21 million projects and contests to date in over 2,000 areas as diverse as website development, logo design, marketing, copywriting, astrophysics, aerospace engineering and manufacturing.

Freelancer owns Escrow.com, the leading provider of secure online payments and online transaction management for consumers and businesses on the Internet with over US$5 billion in transactions secured. Freelancer also owns Freightlancer & Loadshift, enterprise freight marketplaces with over 550 million kilometers of freight posted since inception. Freelancer Limited is listed on the Australian Securities Exchange under the ticker ASX:FLN and is quoted on OTCQX Best Market under the ticker FLNCF.

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