C# Developer

Join our ongoing collaboration with one of the largest North American banks – serving over 17 million clients worldwide. We are seeking a strong Software Developer to join the Cash Analytics team, responsible for building and supporting core pricing and risk analytics platforms for cash products.

This role focuses on developing high-performance, data-intensive systems used for pricing, risk calculation, and large-scale batch processing. The candidate will work closely with front office, risk, and engineering teams to deliver scalable, reliable, and efficient solutions in a complex production environment.

Industry: Finance

Location: Kraków / Hybrid/ Remote from Poland

Your daily work will include:

• Taking care of existing C#/.NET applications and developing new backend services, APIs, and integrations

• Design, develop, and enhance pricing and risk analytics systems (batch and real-time)

• Work with large datasets and optimize data processing performance (SQL, in-memory, parallel processing)

• Collaborate with front office and risk teams to translate business requirements into technical solutions

• Troubleshoot and resolve complex production issues in critical systems

• Improve system scalability, performance, and reliability

• Contribute to system design and modernization of legacy platforms

• Write clean, maintainable, and efficient code following best practices

• Collaborating with developers across Poland and Canada

• Participating in code reviews, discussing technical improvements, and sharing best practices

• Using GitHub, Jira, and Jenkins for CI/CD and task management

Team & Collaboration

• 5 (Montrose) + around 30 on the client’s side, including developers, QAs, Business Analysts, and Project Managers

• Regular meetings:

  • 3 short standups per week (Montrose team)

  • 1 weekly standup (all team)

  • 1 weekly project status meeting (all team)

• Communication via email and Webex chat

• Working hours: usually 9:00–17:00 CET 

Qualifications:

• Strong knowledge of C# and .NET

• Good understanding of data structures, system design, and performance optimization

• Good knowledge of Python

• Solid experience with SQL, including performance tuning and working with large datasets

• Knowledge of Git and collaborative development workflows

• Proven ability to debug and resolve issues in complex production environments

• Experience working in Linux environments

Perks, Snacks & Everything Nice :)

Work Environment & Flexibility

• Top-quality equipment to support your work

• Flexible working hours

• Remote work option

• Exciting and challenging projects with international teams

Learning & Development

• English lessons with a native speaker

• Dedicated training budget for personal and professional growth

Health & Well-being

• Private medical insurance

• Multisport card 

• Air-conditioned workspace

• Showers available at the office

Food & Comfort

• Lunches from Kraków’s top restaurants delivered to the office or a refund of the budget allocated for it

• Fully stocked kitchen with drinks, fruit, and snacks

Lifestyle & Fun

• No dress code- dress comfortably

• Chillout area with bean bags, therapy balls, PlayStation 4, Nintendo Switch 2 + games, stretching area, and pull-up bar

• Regular team events

Additional Perks

• Indoor bicycle parking