Senior Software Engineer - C#/.NET and React | Fintech, Crypto, FX

Overview

Join a rapidly expanding fintech exchange impacting the crypto and foreign exchange markets by developing high-performance digital applications. This role demands a Senior Software Engineer proficient across the entire stack, with expert capabilities in backend C#/.NET programming alongside hands-on React and TypeScript frontend development.

Key Responsibilities

• Design, develop, and sustain features spanning the customer-facing platform including website, onboarding processes, account management, promotional content, and authentication flows.
• Craft backend services and APIs utilizing C# and .NET technologies.
• Develop contemporary frontend interfaces with React.js and TypeScript.
• Maintain ownership of feature lifecycle from design to deployment and ongoing production support.
• Influence architectural strategies and direct technical methodologies within the engineering unit.
• Commit to delivering code that is clean, maintainable, and testable with adherence to engineering best practices through code reviews.
• Enhance frontend performance metrics, accessibility standards, SEO effectiveness, and overall user experience.
• Build and support multi-region and multilingual product functionality covering internationalization and localization considerations including i18n, l10n, and routing mechanisms.
• Proactively detect and resolve issues related to performance, reliability, and quality before impacting users.
• Collaborate closely with product management, marketing, and commerce teams to implement technology that fuels customer acquisition and business growth.

Candidate Profile and Essential Experience

• Proven senior-level full stack developer with strong C#/.NET backend expertise.
• Hands-on experience in React.js and TypeScript for frontend development.
• History of delivering customer-centric digital products with strong API and service-oriented architecture knowledge.
• Familiarity with headless CMS and content-driven systems.
• Understanding scalable and maintainable frontend structures.
• Experience creating products for diverse regions and languages and knowledge of internationalization and localization.
• Expertise in technical SEO practices including crawlability, structured data, and Core Web Vitals performance optimization.
• Strong instincts regarding edge cases, failure scenarios, testing strategies, and code maintainability.
• Focus on front-end usability, quality, and conversion rates beyond mere functionality.
• Ownership mindset with accountability extending beyond code deployment.
• Adaptability in dynamic environments with shifting priorities.
• Commercial awareness connecting engineering excellence with revenue and user growth objectives.

Desirable Skills

• Experience in finance technology sectors such as fintech, cryptocurrency, foreign exchange, trading, or exchange platforms.
• Background in high-conversion consumer or e-commerce product development.
• Working knowledge of customer onboarding, identity verification workflows, and KYC processes.
• Hands-on with authentication and single sign-on technologies including OAuth 2.0, OIDC, or SAML.
• Expertise in frontend performance optimization tools and methods such as Lighthouse, accessibility standards, and multi-device compatibility.

Additional Information

This senior engineering appointment offers substantial product impact and technical leadership opportunities, balancing strategic influence with practical coding involvement. The role is based in Sydney CBD requiring onsite presence five days per week, offering a remuneration package around $200,000 inclusive of base salary, superannuation, and performance bonus. It is a permanent role exclusively for candidates with full Australian work rights as no visa sponsorship is provided.