{"id":1242357,"url":"https://alion.io/job/optimum-infosystem-senior-net-developer","title":"Senior .NET Developer","company":{"id":3800114,"name":"Optimum Solutions","domain":"theoptimum.net","url":"https://alion.io/company/optimum-infosystem","size_band":"1001-5000","is_staffing_agency":true,"employer_type":"agency","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":7500,"max":12500,"currency":"SGD","period":"month","gross":true,"usd_annual":117444},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon S3","optional":false},{"name":"API Gateway","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"C#","optional":false},{"name":"Docker","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"JavaScript","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Oracle","optional":false},{"name":"Quarkus","optional":false},{"name":"SQL","optional":false},{"name":"Storybook","optional":false},{"name":"Windows Server","optional":false},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-09-25T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-09-25T00:00:00Z","board_verified":false,"closed_at":null,"days_open":4,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":4},"description":"Key Responsibilities\nBackend Development:\nDesign, develop, and maintain microservices architecture using .NET Core,.NET 8 and Java.\nImplement event-driven architecture to enable seamless communicationbetween microservices.\nUtilize Entity Framework (EF) for efficient database interactions andmanagement.\nContainerize applications using Docker for scalability and deploymentflexibility.\nApply Domain-Driven Design (DDD) principles to ensure clean and modularcode architecture.\nImplement OAuth for secure authentication and authorization.\nDevelop and enforce security best practices to safeguard sensitive dataand systems.\nUtilize AWS services such as S3, Lambda, API Gateway, RDS, etc., forbackend development.\nDevelop RESTful APIs endpoints to facilitate communication between thefrontend and backend.\nApply Spec Driven Development (SDD) concepts in development of code viaClaude AI technologies.\nSupport and maintain legacy .NET Framework (4.x) applications, includingmigration pathways to modern .NET where applicable.\nManage application hosting and deployment on IIS and Windows Server environments, including environment-specific configuration management using config transformations.\nFrontend Development:\nDevelop responsive and user-friendly web applications using ASP.NET including WebForm applications.\nGenerate and review unit tests using generative AI to ensure code quality and reliability.\nCreate reusable UI components and maintain a consistent design usingStorybook.\nCollaborate closely with UX/UI designers to implement intuitive andvisually appealing interfaces.\nTroubleshoot and debug issues across the stack, ensuring smooth application operation.\nOptimize application performance and scalability for a seamless user experience.\n\nRequirements:\nProven professional experience working on .NET Core stack.\nStrong proficiency in .NET Core, .NET 8, C#, Java and related backendtechnologies.\nExperience building microservices architecture and implementingevent-driven design patterns.\nProficiency in Entity Framework (EF) for database management.\nFamiliarity with Docker and containerization principles.\nKnowledge of Domain-Driven Design (DDD) principles and their applicationin backend development.\nExperience implementing OAuth for authentication and authorization.\nUnderstanding of security best practices and their application in backenddevelopment.\nHands-on experience with AWS services such as S3, Lambda, API Gateway,RDS, etc.\n Proficiency in frontend technologies such as HTML, CSS, and JavaScript,ASP.NET and WebForms.\nExperience writing unit tests and maintaining a design system with Storybook.\nStrong problem-solving skills and attention to detail.\nExcellent communication and collaboration skills.\nKnowledge and experience in utilizing generative AI to develop andreview codes via Spec Driven Development (SDD).\nHands-on experience with legacy .NET Framework (4.x) applications including maintenance and incremental modernisation.\nExperience with Oracle databases, including query optimisation and integration with .NET applications.\nProficiency in deploying and configuring applications on IIS and Windows Server, with working knowledge of Web.config transformations for environment-specific deployments.\nHands-on experience with Java Quarkus framework, including building and deploying cloud-native microservices, with working knowledge of OpenTelemetry for distributed tracing and observability. \nSkills\nKubernetes, .NET, Design Patterns, AWS, OAuth, JavaScript, Software Architecture, Full Stack Development, ASP.NET MVC, .NET Core, .Net Framework, Microservices Design, ASP.NET, SQL Server, Event-Driven Architecture (EDA), Docker, C#, API, Backend Development, AWS Lambda","description_format":"text","description_chars":3702,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","IT Resellers & VARs"],"lifecycle":[{"event":"open","at":"2026-09-25T16:15:06Z"}],"liveness":{"score":54,"band":"ok","label":"Likely open","p_open":1,"p_active":0.542,"p_room":1,"age_days":3,"expected_fill_days":31,"reasons":["seen:3","agency","velocity","win:early","comp:attention"],"computed_at":"2026-09-28T05:45:00Z"},"pay":{"stated_usd_annual":117444,"is_top_pay":false},"html_url":"https://alion.io/job/optimum-infosystem-senior-net-developer","json_url":"https://alion.io/job/optimum-infosystem-senior-net-developer.json","meta":{"generated_at":"2026-09-29T04:43:09Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4481,"day_limit":5000,"remaining_today":519,"minute_limit":60,"resets_at":"2026-09-30T00:00:00Z"}}}