Software Engineer (Fullstack)
RedCore is building a new HR product from scratch! We are looking for a senior engineer who enjoys working closely with Product, takes ownership of architecture decisions, and can build scalable systems from the ground up. This is a hands-on role with real impact on product direction and technical foundations.
- Design, develop, and maintain a scalable product using .NET and React
- Build clean, maintainable, and well-documented code
- Optimise application performance, reliability, and security
- Design and maintain database structures in PostgreSQL
- Integrate third-party APIs and AI services
- Collaborate closely with Product, Design, and Engineering teams
- Participate in Agile processes and continuous improvement
- 5+ years of professional experience in fullstack development using the latest .NET Core and React (TypeScript)
- Strong proficiency in ASP.NET Core and modern C#
- Strong experience with relational databases (preferably PostgreSQL and ORM tools (EF Core)
- Hands-on experience designing and optimising database schemas and queries
- Experience with Docker and GCP/AWS-based deployments
- Experience building products from scratch in dynamic environments
- Solid understanding of REST API design principles
- Practical knowledge of unit and integration testing
- Strong understanding of security best practices and performance optimisation
- Experience designing scalable backend architectures
- Understanding of monitoring and observability best practices
- Production-based experience to work with AI agents and modern AI tools (Cursor, Copilot, Codex, etc.)
- Experience integrating AI services (e.g. OpenAI, Azure OpenAI, Anthropic)
- Experience with Jira integration
- Are product-minded and customer-focused
- Strong problem-solving skills and collaborative mindset
- Understand that successful products are built around user value
- Enjoy collaborating with Product and proposing your own ideas
- Balance Engineering and Product goals
- Are proactive and comfortable solving complex challenges
- Be ready to be a core player in the team
- Paid vacations, sick leave, personal events days, days off.
- Corporate health insurance program for your well-being.
- Referral program - enjoy cooperation with your colleagues and get the bonus.
- Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences.
- Rewards program for mentoring and coaching colleagues.
- Free internal English courses.
- Yoga classes to help you stay active and energized.
- In-house Travel Service.
- Multiple internal activities: online platform for employees with quests, gamification, presents and news, RedCore clubs for movie / book / pets lovers, special office days dedicated to holidays.
- Company events, team buildings.
PIN-UP Global is an international holding company that develops technologies, B2B solutions and products for the iGaming industry. Headquartered in Warsaw, the group brings together businesses spanning product development, technology and marketing services for online gaming. It supports a portfolio of companies and brands operating across multiple markets. PIN-UP Global focuses on building advanced technology and products for the gambling sector.