Senior Fullstack Developer (React / .net)

Join a newly built team to create from scratch a system for managing receivables, payments, and financial risk. The platform supports the full Invoice to Cash process, including invoice issuance, payment matching, receivables management, and debt collection workflows. It enables collection specialists to work with automated decision-making workflows.

The system will be extended with AI components, such as agent-based customer contact, delay root cause analysis, action recommendations, and risk management assessing customer payment capacity based on multi-source data. The solution is built as a greenfield project with a strong focus on automation, integrations, and scalability.

Quick Facts

• Greenfield project
• Microservices architecture
• 70% React / 30% .NET development
• Strong focus on AI, automation, integrations, and scalability

Responsibilities

• Designing microservices architecture
• Full-stack development (React / .NET)
• System integrations
• Building CI/CD processes
• Automating development processes
• Co-defining SDLC (release strategy, testing, rollout)
• Implementing AI in development

Requirements

• Minimum 6 years of experience in React and TypeScript development
• Practical experience with .NET
• Experience designing systems from scratch (greenfield)
• Strong system design skills
• Very good knowledge of PostgreSQL
• Experience with integrations and data-heavy systems
• Experience with Azure or other cloud solutions
• Experience with CI/CD and automation
• Ability to work under pressure and deliver solutions
• Proactive and problem-solving mindset
• Openness to working with AI tools in daily development
• Very good command of Polish and English (minimum B2)

Nice to have

• Experience in financial systems
• Experience with AI agents
• Tech leadership experience
• Knowledge of Snowflake / data layer
• Experience with AI workflows
• Experience with SQL Server (legacy)