Senior .NET & React Developer — AI-Driven Transformation

FinXL AU; Sydney; On-site; AUD 140,000 - 180,000; Full time

Job summary

FinXL Professional Services seeks a senior .NET and React Developer to join our consulting team and be deployed with a leading government client on a major transformation program.

You will design, implement, and govern scalable web applications using C#, ASP.NET Core, React, and REST APIs, while leading code reviews, mentoring peers, and ensuring security, accessibility, and quality. The role requires 7+ years of experience and Australian citizenship for Baseline security clearance.

Qualifications

• 7+ years of commercial development experience.
• Advanced hands-on with C#, .NET Core, React, REST APIs.
• Experience governing AI-assisted tools (Claude Code) and applying governance.

Responsibilities

• Develop, unit test, and deploy scalable .NET and React web applications.
• Lead technical design, code reviews, and proofs of concept.
• Drive adoption and governance of Claude Code across the SDLC.
• Translate requirements into compliant designs.
• Ensure solutions meet architecture, WCAG accessibility, security, and privacy standards.
• Lead resolution of performance, integration, and production issues.
• Provide technical leadership, mentoring, and coaching to developers.

Skills

C#

.NET / ASP.NET Core

React

REST APIs

Claude Code

Software architecture

Code reviews

Agile delivery

Security & privacy

Tools

Git

CI/CD

Job description

FinXL Professional Services seeks a senior .NET and React Developer to join our consulting team and be deployed with a leading government client on a major transformation program.

You will design, implement, and govern scalable web applications using C#, ASP.NET Core, React, and REST APIs, while leading code reviews, mentoring peers, and ensuring security, accessibility, and quality. The role requires 7+ years of experience and Australian citizenship for Baseline security clearance.