{"schemaVersion":"jobsearcher.job.v1","id":"7c8d4bf9b717b04a94d1f080","url":"https://jobsearcher.com/jobs/7c8d4bf9b717b04a94d1f080","canonicalUrl":"https://jobsearcher.com/jobs/7c8d4bf9b717b04a94d1f080","title":"C# / .NET Developer — API Identity authentication and authorization services","description":"C# / .NET Developer — API Identity authentication and authorization services (Mid-Level) About the RoleWe are looking for a mid-level C# / .NET developer to build and maintain high-performance API services that power our trading platform. You will work on various .NET API services other across the platform, specifically around our identity authorization and authentication API. This is a backend-focused role. You will work with Redis and relational databases to deliver scalable and reliable APIs in a production trading environment. Strong .NET fundamentals and comfort with distributed systems are important.What You'll Work On• Cross-service features — API services using SQL (PostgreSQL or SQL Server) and Redis, across the broader platform• Redis-backed data access — Reading and serving cached data snapshots with low latency; session and user-state management across data servers• API platform patterns — Building on our internal REST server framework: dual-port public/private hosting, Swagger documentation, compression, CORS, and standardized error handlingResponsibilities• Design, implement, and maintain REST API endpoints in C# / ASP.NET Core (.NET 8+)• Experience with authorization and authentication best practices including OAuth 2.0, API keys, JWT tokens, MFA, key rotation, etc.• Integrate with Redis for caching, snapshots, and pub/sub patterns using StackExchange.Redis and related libraries• Write and optimize SQL queries and stored procedures against PostgreSQL or SQL Server as needed• Add Swagger/OpenAPI documentation and follow established API conventions• Tune performance for high-throughput, low-latency scenarios (thread pool configuration, connection pooling, async patterns)• Participate in code reviews, troubleshooting production issues, and iterative feature deliveryRequired Qualifications• 3–5 years of professional experience with C# and .NET (ASP.NET Core)• Solid understanding of REST API design, HTTP semantics, and API versioning practices• Comfort with async/await, dependency injection, and standard .NET service patterns• Experience with Redis — caching, key design, connection management, and basic pub/sub• Experience with relational databases — writing queries, understanding indexes, and working with PostgreSQL or SQL Server• Familiarity with Git, CI/CD pipelines, and deploying services to productionNice to Have• Experience with Polly or similar resilience libraries (retries, circuit breakers)• Experience with performance logging, observability, and production debugging under load","company":"Tradezero America","rawCompany":"tradezero america","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-09-02T08:18:40.883Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"C# / .NET Developer — API Identity authentication and authorization services","description":"C# / .NET Developer — API Identity authentication and authorization services (Mid-Level) About the RoleWe are looking for a mid-level C# / .NET developer to build and maintain high-performance API services that power our trading platform. You will work on various .NET API services other across the platform, specifically around our identity authorization and authentication API. This is a backend-focused role. You will work with Redis and relational databases to deliver scalable and reliable APIs in a production trading environment. Strong .NET fundamentals and comfort with distributed systems are important.What You'll Work On• Cross-service features — API services using SQL (PostgreSQL or SQL Server) and Redis, across the broader platform• Redis-backed data access — Reading and serving cached data snapshots with low latency; session and user-state management across data servers• API platform patterns — Building on our internal REST server framework: dual-port public/private hosting, Swagger documentation, compression, CORS, and standardized error handlingResponsibilities• Design, implement, and maintain REST API endpoints in C# / ASP.NET Core (.NET 8+)• Experience with authorization and authentication best practices including OAuth 2.0, API keys, JWT tokens, MFA, key rotation, etc.• Integrate with Redis for caching, snapshots, and pub/sub patterns using StackExchange.Redis and related libraries• Write and optimize SQL queries and stored procedures against PostgreSQL or SQL Server as needed• Add Swagger/OpenAPI documentation and follow established API conventions• Tune performance for high-throughput, low-latency scenarios (thread pool configuration, connection pooling, async patterns)• Participate in code reviews, troubleshooting production issues, and iterative feature deliveryRequired Qualifications• 3–5 years of professional experience with C# and .NET (ASP.NET Core)• Solid understanding of REST API design, HTTP semantics, and API versioning practices• Comfort with async/await, dependency injection, and standard .NET service patterns• Experience with Redis — caching, key design, connection management, and basic pub/sub• Experience with relational databases — writing queries, understanding indexes, and working with PostgreSQL or SQL Server• Familiarity with Git, CI/CD pipelines, and deploying services to productionNice to Have• Experience with Polly or similar resilience libraries (retries, circuit breakers)• Experience with performance logging, observability, and production debugging under load","datePosted":"2026-09-02T08:18:40.883Z","dateModified":"2026-09-02T08:18:40.883Z","hiringOrganization":{"@type":"Organization","name":"Tradezero America","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"7c8d4bf9b717b04a94d1f080"},"url":"https://jobsearcher.com/jobs/7c8d4bf9b717b04a94d1f080"}}