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November 3, 2026

.NET Backend Developer

Senior • On-site

Gdańsk, Poland

Quick Facts

  • Role: .NET Backend Developer

  • Team: Portal Solutions Team (backend for mobile corporate clients)

Description

You will develop and design backend components and processes that support mobile applications for corporate clients. You will work on system and functional solutions including processes, integrations, business logic, and user interactions, and participate in designing distributed architecture (microservices, distributed systems, SOA). You will focus on enterprise-grade security and performance, collaborate with analysts and business stakeholders, and support agile delivery and testing/quality.

Responsibilities

  • Develop and design backend components and processes for mobile corporate-client applications

  • Design system and functional solutions: processes, integrations, business logic, mockups, and user interactions

  • Participate in architecture design for microservices/distributed systems/SOA

  • Work on enterprise security and system performance

  • Collaborate with analysts and business on requirements

  • Support delivery process and coordinate implementations

  • Improve testing, product architecture, and code quality

  • Build solutions using Agile/Scrum methodologies

Requirements

  • Minimum 5 years of experience as a .NET Developer in IT projects (finance domain preferred)

  • Solid knowledge of REST, SOAP, Kafka, Redis, SQL Server, Entity Framework, Microservices, .NET 6/8, and .NET Framework 4.8

  • Strong communication skills and ability to explain complex technical topics

  • Understanding of distributed architecture principles, application optimization, and DDD

  • Fluent English

  • Teamwork and ability to independently organize work and set priorities

Additional Advantages

  • Experience supporting mobile applications (Android/iOS)

  • Security certifications

  • Project management certifications and practical application

  • Experience with user story mapping and event storming

Benefits

  • Employment contract with periodic bonus

  • Real impact on the product direction for corporate clients

  • Opportunity to work on large-scale, highly complex technical projects

  • Knowledge-sharing culture and technical decision-making in agile teams

  • Modern in-house stack and solution development

  • Stability and growth opportunities as part of a major financial institution

  • Access to Mindgram and MyBenefit platform (discounts/benefits, including sports card, cinema tickets, prepaid cards, shopping vouchers)

  • Medical care and ability to join group insurance on preferential terms

  • Hybrid work model in a modern office in Gdańsk (Targ Drzewny 1)

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