Senior AI-First Full Stack Developer

Springtime Technologies is growing rapidly, and we're looking for a Senior Full Stack Developer with an AI-first mindset to drive the next evolution of our platform. In this senior hands-on role, you will own both backend and frontend delivery, architecting scalable services, building robust APIs, and shipping production-ready React interfaces - across our SaaS platform used by 200,000+ users across 75+ countries., * Lead backend architecture design - ensuring scalability, performance, and maintainability.

• Design, build, and optimize RESTful APIs and service integrations powering our SaaS platform.
• Own database design and data modeling decisions.
• Apply clean architecture principles, domain-driven design, and proper separation of concerns.
• Build and own frontend features in React/TypeScript - from component design to API integration and state management.
• Define clean API contracts between backend services and frontend interfaces you build and ship yourself.
• Establish and enforce coding standards and best practices across backend and full stack development.
• Perform code reviews and provide constructive technical feedback. Mentor engineers and guide technical decision-making.

We work with both .NET (C#) and Python stacks. You are not required to know both, strong, senior-level expertise in either is sufficient. We care about depth over breadth., Above all else, we are looking for someone who thinks with AI at the centre. This means:

• You actively use AI tools (GitHub Copilot, Claude) in your daily development workflow - not occasionally, but as a default.

• You have hands-on experience integrating LLM APIs (e.g. OpenAI, Anthropic Claude, Azure OpenAI) or AI/ML components into production applications.

• You approach architecture decisions with an AI-augmentation lens: what can be automated, enriched, or replaced with a model?, * Bachelor's or Master's degree in Computer Science - or equivalent professional experience.

• 5+ years of professional full stack development experience - backend and frontend.

• Strong experience designing and building RESTful APIs and distributed systems. Solid proficiency in C# (.NET stack) OR Python - senior-level depth in one is sufficient.

• Strong experience with relational databases (MS SQL Server, PostgreSQL).

• Hands-on experience building production UIs with React and TypeScript - not just consuming APIs.

• Confident with state management patterns, component architecture, and frontend performance.

• Understanding of CI/CD pipelines and containerized environments (Docker). Fluent English, spoken and written.

Springtime Technologies is a provider of AI-based cloud solutions for accounts payable automation serving multi-national companies in the manufacturing, pharmaceutical and chemical industries. We enable our customers to automate the incoming invoice process on a global scale. More than 120,000 business users in 70 countries use our cloud software already. The company was founded in 2004 by a team of AI experts and has offices in Germany, Austria, and the Philippines.