Mid Level .NET Developer

Top 3 Reasons To Join Us International environment - Onsite Opportinity Premium Personal Health Insurance 20 days Leave The Job Keystone AIis a comprehensive Dealer Management System (DMS) serving automotive dealerships across Australia, the Middle East, UK, Japan and Asia-Pacific. Built on a mature .NET technology stack, the product handles end-to-end dealership operations — vehicle sales, service workshops, parts inventory, accounting, and third-party OEM integrations. Our Professional Services team delivers manufacturer integrations, API Gateway services, custom reporting, and emerging core features. We're looking for a Mid-Level .NET Developer to join us and contribute across the full breadth of our delivery. Stack you will work with: Core C# / .NET Framework API & Services ASP.NET Core Web API RESTful Services API Gateway patterns (routing, authentication, rate limiting) Database Microsoft SQL Server T-SQL Stored Procedures Integrations OEM Manufacturer APIs (Ford, BMW, Toyota, etc.) Desktop Windows Forms (maintenance & modernisation) DevOps Git Azure DevOps CI/CD Pipelines What You'll Do Build and maintain the desktop application — build and maintain WinForms screens and incrementally refactor toward modern patterns. Develop manufacturer and third-party integrations — map payloads and handle real-time and batch data exchange with OEM systems (Ford, BMW, Toyota, Jaguar/Land Rover, etc.). Write and optimise T-SQL stored procedures for data retrieval, reporting, and integration logging. Build and maintain RESTful APIs and integration services — design endpoints, implement authentication (OAuth2/JWT), versioning, and request/response transformation. Implement observability — API logging, monitoring dashboards, and error tracing for integration health. Participate in code reviews, technical design discussions, estimation, and team workshops. Collaborate using Jira for task tracking and Confluence for documentation. Your Skills and Experience What We're Looking For Essential 4+ years of professional experience in C# and .NET development. Experience with Windows Forms desktop applications. Experience building RESTful APIs with ASP.NET Core / Web API. Solid Microsoft SQL Server skills — writing and optimising T-SQL stored procedures. Understanding of API design principles — versioning, error handling, authentication (OAuth2/JWT). Experience with ASMX / WCF / SOAP web services. Strong debugging and problem-solving skills across the full stack. Experience with Git source control and Jira issue tracking. Good communication skills and ability to work collaboratively. Nice to have Experience with API Gateway patterns or platforms (Ocelot, YARP, Azure API Management). Exposure to AI/ML integration — calling LLM APIs, prompt engineering, RAG patterns, or vector search. Experience with Docker and containerised deployments. Knowledge of the automotive dealership domain (DMS, OEM integrations). Familiarity with message queues (RabbitMQ, Azure Service Bus) or event-driven architecture. Exposure to Python (for AI/ML scripting or data pipelines). Personal Attributes Pragmatic - balances delivery speed with code quality. Curious - eager to learn new domains (automotive, AI, integration patterns). Collaborative - shares knowledge, supports teammates, participates in workshops and retrospectives. Ownership-driven - takes responsibility from development through to production support. Why Join Us? Work on a mature product with real users and real impact across the automotive industry. Diverse project work - from manufacturer integrations and API Gateways to AI features and operational dashboards. Modernisation in progress - cloud services, containerisation, and AI integration. Collaborative engineering culture with experienced developers and clear career progression. Opportunity to grow across .NET, API design, integration architecture, and emerging AI technologies. Why You'll Love Working Here We are our people, and whilst as a business we make software, as an organization, we make some of the industry’s best! Joining the team you will work with the engineers around the world from BMW, Mercedes, Honda, Porches, Hyundai … 1 WORKING HOURS Working hours is flexible and the standard guideline is between 8:00 AM to 5:00 PM with 1 hour break for lunch. Staff can start early and finish early to keep in sync with Australia working hours 2 LEAVES 12 days Annual Leave per annum. Annually leave is accumulated up to 2 years. Additional one annual leave day for every five years of service Sick Leave : 5 days paid per annum. Personal Leave : 3 days per annum 3 HEALTHCARE Premium Personal Health Insurance package for full-time and permanent staff. Annual health check 4 BONUSES 13th month bonus Loyalty reward Program (Bonus for every 3 years, 5 years of service) Project/ Performance Bonus 5 OTHER BENEFITS, ALLOWANCES AND INCENTIVES 100% salary during Probation Period Fully sponsored onsite trip to Titan international offices (AU, Thailand, UAE, EU etc.) Gifts on special occasions + holidays (Tet, Full-moon festival, Birthday, Christmas etc.) Employee Referral Program Internal events every month (Happy lunch, Milk tea Friday, etc.) Sport Activity Funding (Football every Tuesday & Thursday) Education Funding