Senior Fullstack Developer (.NET)
Company Overview
Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction. 🙂 Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives. Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.
Proxify is a leading global network of top-tier, vetted remote software, data, and AI professionals, designed to help businesses rapidly scale their tech teams with world-class talent, delivering the perfect match within two days on average. Only 1% of applicants, from over 20,000 applications each month, are accepted into the network to ensure unmatched quality. Our service offers the speed, quality, and flexibility that innovative companies demand, with true technical experts to assist at each step—enabling you to seamlessly augment your existing team or build a new one without the administrative burden and risk of traditional employment. Founded in 2018 and headquartered in Stockholm, Sweden, Proxify connects over 5,000 professionals across more than 90 countries, covering over 500 tech competencies. Trusted by over 2,000 clients worldwide—including industry leaders like Securitas, King, Electronic Arts, Electrolux, Education First, and PwC—Proxify is redefining how businesses hire tech talent. In 2025, Proxify earned a spot on the Financial Times 1,000 list as one of the fastest-growing companies in EMEA and number three in Sweden—following our inclusion in the Deloitte Fast 50 Sweden in 2023.
Job Summary
We are looking for a Senior Fullstack .NET Developer to join our fast-growing Network. In this role, you’ll own the design and implementation of backend services and APIs using .NET (C# / ASP.NET Core), while delivering polished, performant user interfaces using modern frontend technologies and .NET-driven UI frameworks. You will collaborate with product managers, designers, and other engineers to deliver end-to-end features, make architectural decisions, and mentor more junior engineers. This is a long-term, full-time remote engagement. You’ll have the opportunity to work with modern cloud platforms, CI/CD pipelines, and deliver impactful features in real products used by customers around the world.
Key Responsibilities
- Design, implement, and operate scalable backend services using .NET (C#, ASP.NET Core).
- Build and maintain responsive, accessible user interfaces using modern frontend technologies and/or .NET UI frameworks (e.g., Blazor, Razor Pages).
- Design and consume robust RESTful APIs (and optionally GraphQL) and integrate with databases and external systems.
- Ensure code quality through testing (unit/integration), code reviews, and automated pipelines.
- Drive architectural decisions for backend, frontend, and their integration (microservices, monoliths, or hybrid).
- Collaborate with designers and product teams to translate requirements into technical solutions and great user experiences.
- Troubleshoot production issues, optimize performance, and ensure application reliability and security.
- Mentor and coach other engineers, contribute to best practices and team processes.
- Participate in an agile development process and help continuously improve delivery and observability.
- Document design choices, API contracts, and deployment procedures.
Requirements / Qualifications
- 5+ years of professional software development experience, with strong fullstack exposure.
- Relational databases - MSSQL experience.
- 3+ years of production experience with .NET (C#, .NET Core / .NET 6+) and ASP.NET Core.
- Solid knowledge of JavaScript/TypeScript, HTML5 and CSS3, or experience with .NET UI frameworks such as Blazor and Razor Pages.
- Experience with relational databases (e.g., SQL Server, PostgreSQL) and ORM tooling such as Entity Framework Core.
- Strong understanding of RESTful API design and integration patterns.
- Experience with automated testing (unit, integration) and test frameworks for both backend and frontend.
- Practical experience with containerization (Docker) and familiarity with CI/CD pipelines (e.g., GitHub Actions, Azure DevOps, GitLab CI).
- Experience deploying and operating services in the cloud (Azure preferred, AWS/GCP acceptable).
- Ability to work independently and deliver high-quality results in a remote setup.
- Intermediate-advanced English
- Located in CET timezone (+/- 3 hours), we are unable to consider applications from candidates in other time zones.
Preferred Qualifications
- Deep experience with TypeScript and modern frontend tooling (Vite, Webpack).
- Proven experience with Blazor, ASP.NET MVC or other .NET-centric UI frameworks.
- Familiarity with microservices patterns, DDD, CQRS or event-driven architectures.
- Experience with container orchestration (Kubernetes).
- Knowledge of message brokers (e.g., RabbitMQ, Kafka, Azure Service Bus).
- Experience with GraphQL and schema design.
- Exposure to performance tuning, caching strategies and observability (logs, tracing, metrics).
Location
EMEA (Remote), Located in CET timezone (+/- 3 hours)
Employment Type
Full Time
Salary & Benefits
- Get paid, not playedNo more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.
- Predictable project hoursEnjoy a harmonious work-life balance with consistent 8-hour working days with clients.
- Flex days, so you can rechargeEnjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.
- Career-accelerating positions at cutting-edge companiesDiscover exclusive long-term remote positions at the world's most exciting companies.
- Hand-picked opportunities, just for youSkip the typical recruitment roadblocks and biases with personally matched positions.
- One seamless process, multiple opportunitiesA one-time contracting process for endless opportunities, with no extra assessments.
- CompensationEnjoy the same pay, every month with positions landed through Proxify.
