Build the first experience customers have with a financial platform. We’re recruiting a Senior Software Engineer for a financial services client’s customer acquisition team. You’ll work on the journey from someone’s first visit to becoming an active customer: the public website, onboarding, identity verification, sign-in and promotions.

This is a hands-on role with real ownership. You’ll build across the stack, help shape technical decisions and see how your work affects customer experience and growth. What you’ll do

- Build customer-facing features in React and TypeScript, alongside APIs and services in .NET.
- Improve onboarding, SSO and the systems that determine what information each customer needs to provide.
- Own features from design discussions through release and ongoing improvement.
- Work closely with design, product, compliance and other engineers.
- Keep performance, reliability, accessibility and maintainability front of mind.

What you’ll bring
- Strong full-stack engineering experience,



with solid .NET skills and confidence building frontend products in React and TypeScript.
- Experience with relational databases, data-driven rules and headless CMS platforms.
- An eye for edge cases and a habit of writing explicit, testable code.
- Curiosity about how technical decisions affect conversion and the customer experience.
- The confidence to take ownership while priorities evolve.

Experience with OAuth/OIDC or SAML, KYC integrations, multilingual websites, technical SEO or high-conversion digital products would be a bonus. The details
- Location: Sydney, NSW (on-site)
- Seniority: Mid-Senior level
- Employment type: Full-time

If you like building polished customer experiences and enjoy solving the engineering challenges behind them, I’d love to hear from you. Apply now or reach out for a confidential chat.

📌 Senior Software Engineer | Full Stack .NET & React | Sydney (On-site)
🏢 Big Wave Digital
📍 Sydney