Senior .NET Developer – Enterprise Integrations
- Location
- Warsaw, Poland
- Work mode
- Hybrid
- Type
- Contract
- Seniority
- Senior
- Salary
- Not stated
- Languages
- EN
- Posted
- 21 Oct 2026
Verified open 1 Nov 2026 · Source: Traffit
About the role
Senior .NET Developer – Enterprise Integrations
Location: Warsaw | Hybrid – 3 days per week from the client’s office
Contract: B2B
About the role
We are looking for an experienced Senior .NET Developer to join an international organisation operating in the transport and logistics industry.
You will work on a business-critical integration platform responsible for processing and consolidating shipment, status and customs-related data from multiple systems. The role combines backend development, system integration, production troubleshooting and gradual modernisation of an established .NET solution.
Your responsibilities
- Maintain and further develop an existing C# / .NET Framework solution based on Windows Services.
- Develop and optimise SQL Server / T-SQL, including stored procedures, query performance, transactions and deadlock analysis.
- Maintain data mappings and processing logic using AutoMapper, Dapper and XML/XSD.
- Develop and maintain integrations based on WCF/SOAP.
- Analyse and resolve production and data consistency issues.
- Cooperate with integration, business and master data teams.
- Support the platform’s modernisation towards modern .NET and REST-based integrations.
- Create and maintain unit and integration tests, technical documentation and development standards.
What we’re looking for
- 5+ years of commercial experience in .NET development.
- Strong knowledge of C# and .NET Framework 4.x.
- Experience with Windows Services and multithreaded processing.
- Very good knowledge of Microsoft SQL Server and T-SQL, including stored procedures, query optimisation, transactions and deadlocks.
- Hands-on experience with WCF/SOAP integrations.
- Experience with XML, XSD and XSLT.
- Familiarity with Dapper, AutoMapper and dependency injection.
- Experience with unit testing and mocking frameworks such as MSTest and Moq.
- Experience with Git.
- Strong analytical and troubleshooting skills.
- Good command of English.
Nice to have
- Experience in the logistics or transport industry.
- Experience migrating legacy .NET Framework applications to modern .NET (8+).
- Knowledge of REST APIs.
- Experience with Microsoft Azure, including Azure Functions or App Services.
- Knowledge of Docker and Kubernetes.
- Experience working in Agile/Scrum environments.
What we offer
- Opportunity to work on a business-critical integration platform used in a global logistics environment.
- Involvement in both maintaining the existing platform and its technical modernisation.
- Private medical care with LuxMed.
- MultiSport card.
Tech stack
C# | .NET Framework | SQL Server | T-SQL | WCF | SOAP | Dapper | AutoMapper | XML | XSD | XSLT | MSTest | Moq | Git
Nice to have: .NET 8+ | REST | Azure | Docker | Kubernetes
Co zyskasz dzięki aplikacji na ofertę Antal?
Gdy Twoja aplikacja zostanie rozpatrzona pozytywnie (zostaniesz zaproszony/a do procesu), otrzymasz wsparcie Konsultanta/Konsultantki, który/a utrzyma z Tobą stały kontakt (mailowo lub telefonicznie), pomoże Ci przygotować się do rozmowy rekrutacyjnej z przyszłym pracodawcą oraz zatroszczy się o jakość procesu rekrutacyjnego, w którym aktualnie bierzesz udział.
Kim jesteśmy?
Jesteśmy liderem rekrutacji specjalistów i menedżerów oraz doradztwa w obszarze HR. Marka obecna jest w 35 krajach, w Polsce działa od 1996 roku. Przez ten czas zbudowaliśmy wiele karier kandydatów, dzięki elastycznemu i kompleksowemu podejściu do wszystkich rekrutacji. Antal tworzy ponad 130 profesjonalnych konsultantów ds. rekrutacji, którzy są oni nie tylko skutecznymi rekruterami, ale także wykwalifikowanymi doradcami, specjalizującymi się zarówno w zakresie wybranego sektora, jak i stanowiska.
Sprawdź inne aktualne oferty pracy na: https://antal.pl/dla-kandydata
Zaobserwuj nasz profil na LinkedIn: https://www.linkedin.com/company/antalpoland
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