Senior Full-Stack Developer & Tech Lead - Fintech (Sydney)

Youx Powered; City of Canada Bay; On-site; AUD 150,000 - 190,000; Full time

Job summary

youX in Sydney invites an experienced Full Stack Developer to join our fintech-focused team. You will lead feature development across backend and frontend systems, shaping scalable architectures while collaborating with design, product, and engineering to refine capabilities.

The role emphasizes strong React (TypeScript) and Next.js skills, Node.js backend excellence, MongoDB expertise, and AWS infrastructure experience, with a collaborative in-office culture in Sydney.

Qualifications

• 5+ years of full stack development experience
• Strong experience with React (TypeScript preferred) and Next.js
• Proficient in Node.js backend development best practices
• Experience working with MongoDB
• Experience working with AWS infrastructure and services
• Proven ability to integrate and work with 3rd-party APIs
• Excellent communication and cross-team collaboration skills

Responsibilities

• Lead and contribute to feature development across backend and frontend systems
• Work across multiple codebases, making architectural decisions for scalability and performance
• Collaborate with design, product, and engineering teams to refine features
• Tackle complex bugs and implement efficient fixes
• Guide and mentor mid-level and junior developers
• Contribute to code reviews and assist with AWS infrastructure where needed
• Drive technical discussions and participate in sprint planning, reviews, and retrospectives
• Maintain high standards of code quality, testing, documentation, and observability

Skills

React

TypeScript

Next.js

Node.js

MongoDB

AWS

APIs

Job description

Help shape the future of fintech at youX.

youX is a fast-growing fintech company powering Australia’s brokers, lenders, and dealerships with cutting-edge technology. As we scale, we’re looking for a Full Stack Developer to join our team full-time in our Sydney office — someone who thrives in a fast-paced environment and brings deep experience, particularly with PHP.

About Us

Our technological ecosystem is transforming the asset finance landscape — from self-serve consumer tools to fully integrated CRM and partner systems. Thousands of dealerships, brokers, and OEM's, interact with youX technology every day, and we're just getting started.

You'll work side-by-side with a cross-functional team of developers, brokers, product leaders, and marketing pros. We’re an ideas-led, solutions-focused workplace, and we want someone who’s ready to lead by example and contribute meaningfully to our technical direction.

What You’ll Be Doing

Lead and contribute to feature development across backend and frontend systems.

Work across multiple codebases, making architectural decisions that support scalability and performance.

Collaborate closely with design, product, and engineering teams to build and refine features.

Solve complex bugs and implement efficient, reliable fixes.

Guide and mentor mid-level and junior developers.

Contribute to code reviews and assist with AWS infrastructure where needed

Drive technical discussions and contribute to sprint planning, reviews, and retrospectives.

Maintain high standards of code quality, testing, documentation, and observability.

What We’re Looking For

5+ year of full stack development experience

Strong experience with React (TypeScript preferred), and Next.js.

Skilled in Node.js and backend development best practices.

Experience working with MongoDB.

Experience working with AWS infrastructure

Proven ability to integrate and work with 3rd-party APIs.

Excellent communication skills and the ability to collaborate across teams and functions.

Why youX?

Work on real-world products used by brokers, dealerships, and customers nationwide.

Be part of a growing, agile team making a tangible impact in the fintech space.

Enjoy a vibrant, collaborative in-office culture based in Sydney.

Contribute directly to the future of finance technology in Australia.

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