Senior .NET Application Maintenance Engineer

Aether Biomedical; Rzeszów; Hybrid; PLN 120,000 - 180,000; Full time

Job summary

A technology solutions company based in Poland is seeking a Senior .NET Application Maintenance Engineer to join their hybrid work environment. The role requires strong development experience in .NET technologies and expertise in troubleshooting, MSSQL databases, and performance optimization. Candidates should possess a proactive mindset and strong communication skills. The position offers a competitive salary and the opportunity to work in a collaborative and agile team.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field.
• Strong development experience in .NET technologies.
• Solid experience with MSSQL databases and SQL queries.

Responsibilities

• Maintain and support applications developed in ASP.NET, .NET Core, and .NET Framework.
• Identify and resolve software and database performance issues.
• Collaborate with cross-functional teams to debug production issues.

Skills

Development experience in .NET technologies

Troubleshooting production system issues

Experience with MSSQL databases

Proactive problem-solving mindset

Debugging and performance optimization

Familiarity with CI/CD tools

Strong communication skills

Education

Bachelor's degree in Computer Science or related field

Tools

Jenkins

TeamCity

Azure DevOps

Job description

Senior .NET Application Maintenance Engineer5 478 - 7 122 USDNet per month - B2B7. Senior .NET Application Maintenance Engineer# Senior .NET Application Maintenance EngineerNet**Salary:** up to **1300 PLN/MD** on B2B**Work model:** hybrid from Gdynia | Warszawa | Kraków | Rzeszów---* Work in an **agile and self-sufficient team** with autonomy over development* Collaborate with an English-speaking, **multicultural team*** The client is **one of the European leaders in its field** and is building a completely new platform using the latest technologies* The **Jit community**will bring you a nice time during regular integration meetings* Enjoy**work-life balance** in a company that values flexibility and innovation**Project**---**What you'll be doing****Expected competences and knowledge*** Bachelor's degree in **Computer Science, Engineering, or a related field*** Strong development experience in **.NET technologies** (ASP.NET, .NET Core, .NET Framework)* Expertise in troubleshooting **production system issues*** Solid experience with **MSSQL databases, SQL, and stored procedures*** A proactive, problem-solving mindset* Previous experience in **debugging and performance optimization*** Familiarity with **CI/CD tools** such as Jenkins, TeamCity, or Azure DevOps* Strong communication skills to interact with both technical and non-technical stakeholders**Technologies** you'll work with---* **.NET Framework, .NET Core, ASP.NET*** **MSSQL*** **CI/CD Tools*** **Debugging & Performance Optimization*** **Version Control*** **DevOps Contributions****Client**---Our client is a Scandinavian supplier of software and services for purchasing and tendering processes in highly formalized conditions, such as orders in accordance with public procurement law at the level of the European Union or individual member states. The delivery center is located in Utrecht. Client’s platforms allow to announce tenders and conduct the entire procedure of collecting and evaluating offers at every stage of the purchasing process. They are used both by public administration bodies at various levels in European countries and by purchasing departments of large companies and corporations.**About Jit Team**---**The Human factor of IT** - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ **over 500 experienced experts**. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what **we have achieved over 15 years of activity**. By supporting indigenous initiatives, we ensure the circulation of good energy.We are looking for a highly skilled **Senior .NET Application Maintenance Engineer** to join our dynamic team. In this role, you will focus on maintaining, troubleshooting, and optimizing applications built with ASP.NET, .NET Core, and .NET Framework. Your expertise in MSSQL databases, debugging, and performance improvement will be crucial in ensuring smooth system operations. Our teams follow a **T-shaped, cross-functional setup**, meaning engineers contribute beyond their primary expertise. While you will focus on application maintenance, you should be comfortable taking on **small tasks in different areas**, including **bug fixes, PR reviews, or DevOps contributions**. We value **collaboration and adaptability** over rigid role definitions.* Maintain and support applications developed in **ASP.NET, .NET Core, and .NET Framework*** Identify and resolve software and database performance issues* Optimize **SQL queries and stored procedures** to improve system efficiency* Collaborate with cross-functional teams to debug and resolve production issues* Implement performance improvements and ensure application reliability* Work with **build and deployment tools** (e.g., Jenkins, TeamCity, Azure DevOps)* Communicate progress and technical updates to stakeholders and team membersSenior .NET Application Maintenance Engineer5 478 - 7 122 USDNet per month - B2BSenior .NET Application Maintenance Engineer., GdyniaJit Team5 478 - 7 122 USDNet per month - B2BBy applying, I consent to the processing of my personal data for the purpose of conducting the recruitment process. Informujemy, że administratorem danych jest Jit Team z siedzibą w Gdyni, ul. Łużycka 8c (dalej jako "administrator"). Masz prawo do żą...This site is protected by reCAPTCHA and the Google and apply.7. Senior .NET Application Maintenance Engineer