{"id":2445611,"url":"https://alion.io/job/antas-senior-full-stack-developer-net","title":"Senior Full Stack Developer ( .NET)","company":{"id":4336773,"name":"Antas","domain":"antas.rs","url":"https://alion.io/company/antas","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":9500,"max":10500,"currency":"SGD","period":"month","gross":true,"usd_annual":98400},"salary_estimate":null,"experience_years_min":12,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Angular","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"Azure","optional":false},{"name":"Azure DevOps","optional":false},{"name":"C#","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"MS SQL","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-10-13T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-13T00:00:00Z","board_verified":false,"closed_at":null,"days_open":5,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":5},"description":"We are seeking a Senior Full Stack Developer (.NET) to architect, develop, optimize, and maintain enterprise-scale web applications using Microsoft .NET technologies and modern frontend frameworks. The role requires strong proficiency in C#, ASP.NET Core, RESTful API development, distributed systems, SQL Server, and cloud-native application engineering, with the ability to deliver secure, scalable, and high-performance software solutions.\nKey Responsibilities\nDesign and implement enterprise applications using C#, .NET 6/7/8, ASP.NET Core, Web API, Entity Framework Core, and LINQ.\nDevelop RESTful APIs, asynchronous services, microservices, and distributed application components.\nBuild responsive frontend interfaces using React.js or Angular, TypeScript, JavaScript, HTML5, and CSS3.\nApply Clean Architecture, Domain-Driven Design (DDD), SOLID principles, dependency injection, and established software design patterns.\nDesign and optimize Microsoft SQL Server databases, T-SQL queries, stored procedures, indexing strategies, execution plans, and transaction processing.\nImplement authentication, authorization, and API security using OAuth 2.0, OpenID Connect, JWT, and ASP.NET Core Identity.\nDevelop system integrations using HTTP/REST protocols, JSON, middleware, and third-party API connectors.\nEngineer scalable cloud-based solutions using Microsoft Azure services and cloud application deployment practices.\nImplement automated unit, integration, and API testing using appropriate testing frameworks and mocking tools.\nConfigure source control, build automation, CI/CD pipelines, and deployment workflows using Git and Azure DevOps.\nPerform code reviews, static code analysis, debugging, root-cause analysis, and application performance profiling.\nDiagnose and resolve complex production issues relating to application latency, memory utilization, database performance, API failures, and system integration.\nEstablish coding standards, reusable component libraries, secure development practices, and maintainable software engineering guidelines.\nProvide technical leadership, conduct design reviews, mentor developers, and support implementation of engineering best practices.\nCollaborate with solution architects, business analysts, QA engineers, DevOps engineers, and stakeholders throughout the Agile software development lifecycle.\nPrepare technical specifications, API documentation, solution designs, and deployment documentation.\nRequired Qualifications and Experience\nMinimum 12 years of professional experience in software development, including at least 7 years of hands-on experience with C# and .NET technologies.\nStrong technical proficiency in .NET Core/.NET, ASP.NET Core, Web API, Entity Framework Core, LINQ, and asynchronous programming.\nMinimum 5 years of hands-on experience developing frontend applications using React.js or Angular, TypeScript, and JavaScript.\nStrong expertise in Microsoft SQL Server, T-SQL, relational database design, query optimization, and stored procedure development.\nProven experience designing and developing enterprise web applications, RESTful APIs, and service-oriented or microservices-based solutions.\nPractical experience with Microsoft Azure, cloud application architecture, and application deployment.\nKnowledge of application security, OAuth 2.0, OpenID Connect, JWT, secure coding, and API access control.\nExperience with Git-based version control, CI/CD pipelines, automated testing, and Azure DevOps or equivalent tools.\nStrong understanding of SOLID principles, design patterns, Clean Architecture, software testing methodologies, and performance optimization.\nExperience in Agile/Scrum delivery, technical design reviews, code reviews, and cross-functional engineering collaboration.\nDemonstrated ability to troubleshoot complex technical issues and provide technical guidance or mentorship to development teams.\nSkills\nDependency Injection, JSON, ASP.NET Core, .NET, Service Handling, DDD, REST APIs development, JavaScript, HTML5, Microsoft SQL Server, Stored Procedures, Cloud Deployment, Authorization, Middleware, Responsive Design, C#, API Security, C for Embedded 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