May 19, 2026

Senior Backend .NET Developer

Senior • Hybrid

Gdansk, Poland

🌎 Nsure.com is America’s first digital insurance agency®.

We empower customers by providing fully online tools to transparently secure home and auto insurance.


Advantages of our platform:

50+ America’s top-rated home and auto insurance companies compete for customers on Nsure.com.

Consumers can compare prices and buy insurance online, on Nsure.com, in minutes.

Our proprietary algorithms and data mining technology recommend coverage levels, so buyers don’t overinsure or underinsure.

Most data needed for comparative quotes is auto-filled, so all the buyer has to do is answer a few simple questions. There are no long forms to fill out. No salesman calling.

Customers don’t have to wait for their existing policies to expire to switch and save. We will help with the paperwork.

Customer data is safe with us. We will never sell or share personal information with third parties.


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Join the Core team as a Senior Backend .NET Developer and build modern solutions based on GraphQL, Azure, and .NET. We're looking for an experienced specialist who embraces technological challenges, values ​​code quality, and wants to have a real impact on the architecture of backend systems.


Scope of Responsibilities 

  • Design, develop, and maintain Core system using .NET (C#)

  • Integrate backend solutions with Azure services

  • Implement solutions following best practices, architecture and design patterns

  • Ensure code clarity, performance, and quality according to best engineering standards. 

  • Guarantee data security and compliance with relevant standards. 

  • Collaborate with other teams to deliver new features. 

  • Monitor and optimize API performance. 

  • Develop and maintain unit and integration tests

  • Provide technical support and mentorship to less experienced team members. 

Required Skills and Technical Knowledge 

Technical Competencies: 

  • Strong proficiency in .NET and the C# language. 

  • Hands-on experience with GraphQL.

  • Practical experience with Azure services.

  • Proficiency with Azure DevOps, including CI/CD pipelines. 

  • Experience working with SQL and NoSQL databases

  • Familiarity with containerization (Docker, Kubernetes) and microservices architecture

  • Experience working with message queue systems (like Azure Service Bus, RabbitMQ). 

  • Proficiency ChilliCream tools (Hot Chocolate, Fusion, Strawberry Shake, Nitro). 

Soft Skills: 

  • Technical maturity and the ability to make independent decisions. 

  • Strong teamwork and communication skills, willingness to share knowledge. 

  • Proactive problem-solving and process improvement mindset. 

  • Accountability for results and quality of delivered work. 

  • Openness to feedback, cross-functional collaboration, and continuous growth. 


💡 If this sounds like your kind of challenge, we’d love to connect!


Benefits you’ll enjoy:

📱 Modern tech stack – Work with the latest technologies.

🧠 Continuous learning – Access to a training platform and support from experienced team members.

🚆 Well-connected office, 7 minutes to Gdańsk Wrzeszcz SKM station,

🏋️ Well-being support – Multisport card to help you stay active and healthy,

🍔 Lunch Thursdays - join our team lunches to connect and share ideas.


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Krakow, Poland

5,700 - 6,200 USD

🏢 Summary: Senior Full Stack Developer role focused on building and maintaining high-performance applications using C# and Angular within an agile Scrum team. The position involves developing scalable backend solutions, contributing to cloud-based transformation initiatives, and applying modern design principles and microservices architecture. The role includes full lifecycle development, testing, documentation, and active participation in Scrum ceremonies. 🗂️ Requirements: 5+ years of experience with Microsoft development stack, .NET and C# experience, Strong knowledge of SQL Server and T-SQL, Experience with ASP.NET, Experience with Angular, Experience with HTML, CSS and JavaScript, Experience with Git, Knowledge of SOLID principles, Experience with Microservices architecture, Experience with Azure and .NET Core, Experience working in Scrum methodology, Fluent English communication skills 📃 Skills: C#, .NET, ASP.NET, SQL, T-SQL, Angular, JavaScript, HTML, CSS, Git, Azure, .NETCore, Microservices, SOLID, Jira 🏢 Description: The Customer: Our Client provides comprehensive operational support and a range of expert services to the world’s leading insurers, brokers, fleet managers and automotive manufacturers. Our 3,300 employees across ten countries deliver exceptional standards on a large scale for over 1,200 clients. We help the global insurance market to handle millions of claims each year in the most cost-effective and efficient ways possible.The Client is embarking on an exciting and challenging transformation program and our software solutions are a driving force behind this strategy using cloud computing and leading-edge design patterns. The Role: This is a great opportunity for an experienced Senior Full Stack Developer to join our super-motivated Software Development team, being part of one of our existing scrum teams. Each agile team includes technical leadership, development, architecture, quality, product and project management roles. We are looking for a Senior Full Stack Developer comfortable with C# and Angular, with a proven history of building high-performance apps. Key Responsibilities: Work on business requests and development improvements Develop, test, document and maintain our application back end build scalable and reusable code Provide realistic estimates for requests, fixes and new ideas Create unit tests Write clear and precise technical documentation Manage realistic work deadlines Participate in all the scrum ceremonies and be part of the team performance and continuous improvement Requirements: 5+ years of experience of Microsoft development stack including; .NET C#, SQL Server T-SQL. Important: ASP.NET, SQL Server, HTML, CSS, Javascript, Angular, Git, excellent verbal and written communication skills in English. Azure, .NET core, SOLID principles, Microservices architecture, Design principles, Angular, Jira. Ideally, you will have experience working with Scrum methodology in a variety of contexts A track record of previous experience, including training, conferences, user groups, and self-study, is desirable. Excellent verbal and written communication skills, in English.

Technology

Jacobs

Senior .NET Developer

Senior

Hybrid

Krakow, MA, Poland

🏢 Summary: Senior Backend Engineer role focused on designing and developing cloud‑enabled web applications, APIs, and digital twin solutions for large-scale data center environments using Azure and NVIDIA Omniverse. The position involves full software development lifecycle responsibilities and collaboration with international teams on global simulation and visualization platforms. 🗂️ Requirements: 7+ years of experience in software development with .NET / .NET Core, Strong C# and .NET programming skills, Experience with REST API development, Experience with Entity Framework or other ORM, Knowledge of relational and non-relational databases, Experience with SQL Server, Experience with Azure cloud services, Proficiency with Git or similar version control systems, Experience processing large datasets, Knowledge of Infrastructure as Code (Terraform preferred) 📃 Skills: C#, .NET, .NETCore, REST, EntityFramework, SQLServer, Azure, AppServices, AzureSQL, AzureFunctions, ServiceBus, Git, Terraform, Omniverse, ORM 🏢 Description: We are seeking a Senior Backend Engineer who will work with local teammates as well as collaborate closely with our U.S.-based project management and development teams, contributing to the design and implementation of modern cloud‑enabled web applications, APIs, and digital twin solutions for large‑scale data center environments. This is a unique opportunity to work on global projects, leverage cutting‑edge technologies such as Azure Cloud and NVIDIA Omniverse APIs, and help shape the future of our next‑generation simulation and visualization platforms. Key Responsibilities Develop and maintain applications using .NET / .NET Core, and Azure cloud services Contribute to the development of digital twin components, including data ingestion, simulation logic, and integration with Omniverse APIs Collaborate with project managers and developers to ensure alignment with client requirements Participate in all stages of the software development lifecycle: design, coding, testing, debugging, and documentation Write clean, efficient, secure, and maintainable code following best practices Liaise with system analysts and business owners to refine requirements and improve applications Work with Azure services such as App Services, Azure SQL, Azure Functions, or Service Bus (depending on project needs) Requirements 7+ years of experience in software development (.NET / .NET Core, Entity Framework (or other ORM), REST APIs)) Strong C# / .NET programming skills and design principles Familiarity with relational/non relational database design and development (SQL Server preferred) Knowledge of Entity Framework or other ORM tools Proficiency with GitHub or similar version control systems Experience with processing large amounts of data Strong English communication skills, both spoken and written, enabling clear explanation of technical topics Ability to work independently and in a collaborative team environment Knowledge of IaC (Terraform preferred) Ideally You’ll Also Have Interest or experience in cloud‑based simulation, IoT, or digital twin technologies Exposure to Agile methodologies (Scrum) Microsoft Certified Developer Associate or Azure certification We offer Rewarding employment: Full-time employment with a salary that matches your qualifications Hybrid work model: Enjoy the flexibility of working from home, with just several office days per month Flexible hours: Start your day anytime between 7:30 and 10:00 AM Comprehensive benefits: Including Lux Med medical care, psychological support, life insurance, My Benefit cafeteria system, Multisport card co-financing, and a car/bike park sharing system Co-financed holidays: Enjoy "Wczasy pod Gruszą" for a well-deserved break Global projects: Engage in exciting international projects Inclusive networks: Join our diverse employee networks like Women's Network, OneWorld, PRISM, Careers Network, Green Team, SpeakUp, Collectively, and more Continuous learning: Participate in our Graduate Development Program, Learners’ Community, and self-learning platforms Language courses: Enhance your skills with courses in English, German, and Polish

Technology

N-iX

Senior Full stack .NET Engineer

Senior

Remote

Kraków, Poland

5,500 - 6,250 USD

🏢 Summary: Senior Full Stack Developer role focused on building and enhancing high-performance applications using C# and Angular within an agile Scrum team. The position involves backend development, scalable architecture design, cloud-based solutions, and active participation in a transformation program leveraging modern design patterns and Azure. The role combines hands-on coding with mentoring and technical leadership responsibilities. 🗂️ Requirements: 5+ years experience with Microsoft development stack, Strong experience with .NET and C#, Experience with ASP.NET, Experience with SQL Server and T-SQL, Experience with Angular, Experience with HTML, CSS, JavaScript, Experience with Git, Knowledge of .NET Core, Understanding of SOLID principles, Experience with Microservices architecture, Experience working in Scrum methodology, English proficiency (written and spoken) 📃 Skills: C#, .NET, ASP.NET, SQL, T-SQL, Angular, HTML, CSS, JavaScript, Git, Azure, .NETCore, Microservices, SOLID, Jira, Scrum 🏢 Description: #5289 The Customer: Our Client provides comprehensive operational support and a range of expert services to the world’s leading insurers, brokers, fleet managers and automotive manufacturers. Our 3,300 employees across ten countries deliver exceptional standards on a large scale for over 1,200 clients. We help the global insurance market to handle millions of claims each year in the most cost-effective and efficient ways possible. The Client is embarking on an exciting and challenging transformation program, and our software solutions are a driving force behind this strategy, using cloud computing and leading-edge design patterns. The Role: This is a great opportunity for an experienced Senior Full Stack Developer to join our super-motivated Software Development team, being part of one of our existing scrum teams. Each agile team includes technical leadership, development, architecture, quality, product and project management roles. We are looking for a Senior Full Stack Developer comfortable with C# and Angular, with a proven history of building high-performance apps. Key Responsibilities: Provide knowledge/helping/mentoring to other developers – team philosophy is important for us! Work on business requests and development improvements – proactivity is appreciated! Develop, test, document, and maintain our application back end. Build scalable and reusable code. Provide realistic estimates for requests, fixes, and new ideas. Create unit tests. Write clear and precise technical documentation. Manage realistic work deadlines. Participate in all the Scrum ceremonies and be part of the team performance and continuous improvement. Knowledge and Experience: 5+ years of experience of Microsoft development stack including; .NET C#, SQL Server T-SQL. Important: ASP.NET, SQL Server, HTML, CSS, JavaScript, Angular, Git, excellent verbal and written communication skills in English. Azure, .NET core, SOLID principles, Microservices architecture, Design principles, Angular, Jira. Ideally, you will have experience working with Scrum methodology in a variety of contexts; different team sizes, organizational cultures, distributed development, etc. A track record of previous experience, including training, conferences, user groups, and self-study, is desirable. Personal Attributes: Self-organising problem solver. Able to think outside the box (open thinking). Strong ability to work effectively in a team. Collaborating, motivating and energizing others (Team player). Encourage and drive others to deliver high-quality, cutting-edge software. You will have attention to detail and have a proactive ethos. Always looking for continuous improvement. Excellent verbal and written communication skills, in English.