About the Position

Senior Legacy Migration Engineer (C#, .Net)

Location: Stockholm, AB, Sweden

Employment Type: FULL_TIME

Start date: 2026-09-07

End date: 2026-12-31

We are hiring a Senior Software Engineer to execute migration and stabilization work across business-critical insurance and pension integrations in our platform.

Responsibilities

Execute migration tasks across legacy and modern components
Validate environment parity and eliminate runtime blockers before cutover
Diagnose and fix production critical issues in services, queues, and integrations
Build and run end-to-end migration verification and rollback tests
Produce concise runbooks and deployment notes for repeatable execution
Ensure all acceptance criteria are met before go or no-go decisions

Requirements

Mandatory Technical Skills

C# and .NET Framework 4.x (3.5 exposure is a plus)
WCF, SOAP, ASMX service maintenance and migration
IIS deployment and troubleshooting (application pools, bindings, config)
Windows Services and Task Scheduler based batch operations
SQL Server troubleshooting and secure configuration handling
IBM MQ integration fundamentals (connectivity, queue and channel diagnostics)
PowerShell automation for deployment, verification, and operations
TFS & Git based workflows and CI/CD pipeline collaboration
General knowledge on PKI (Public Key Infrastructure)

Preferred Technical Skills

Candidate should have at least 2 of the following:

C or C++ maintenance in Windows service environments
Mainframe adjacent integration patterns (EBCDIC and file bridge patterns)
Container and Kubernetes exposure for coexistence with modern APIs
Production observability and incident response in regulated environments
Legacy security hardening (service accounts, encrypted settings portability)

We Offer

Competitive salary
Opportunity to work in a dynamic and innovative environment
Collaborative work culture with infrastructure, DBA, MQ, and operations teams
No people management responsibility

About the Company

emagine Polska is a company operating in the telecommunications industry, based in Warsaw, Poland. The company is involved in innovative projects, focusing on the development and maintenance of portals using modern technologies. Emagine Polska values creativity, motivation, and independence in its team members, emphasizing a collaborative work environment. The company is structured to support agile methodologies, particularly SCRUM, and is integrated with DevOps practices, highlighting its commitment to efficient and effective project management. Emagine Polska is distinguished by its focus on leveraging cutting-edge technologies like React.js and TypeScript, and its dedication to fostering a culture of continuous improvement and innovation.

Senior Legacy Migration Engineer (C#,.Net)

Job description