{"id":19877,"url":"https://alion.io/job/synergy-ecp-c-net-developer","title":"C# / .Net Developer","company":{"id":5649,"name":"Synergy ECP","domain":"synergyecp.com","url":"https://alion.io/company/synergy-ecp","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"D","score":51,"open_postings":45,"ghost_share":0.822,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-20T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Washington, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":125000,"max":155000,"currency":"USD","period":"year","gross":null,"usd_annual":155000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASP.NET Core","optional":false},{"name":"C#","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Git","optional":false},{"name":"GitLab","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Agile","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"CI/CD","optional":true},{"name":"Docker","optional":true},{"name":"Scrum","optional":true}],"status":"live","first_seen_at":"2026-06-23T21:18:14Z","employer_posted_date":"2026-06-23","last_verified_at":"2026-10-21T03:24:54Z","board_verified":true,"closed_at":null,"days_open":119,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":118},"description":"As a C# / .NET Developer, you will contribute to the development, enhancement, and maintenance of web applications and services that support mission-critical operations. You will work hands-on with the .NET framework and associated technologies to build clean, efficient, and reliable backend components that integrate seamlessly with front-end and cloud-based systems. In this role, you will collaborate closely with senior developers, designers, product owners, and other team members to deliver high-quality software solutions that follow best practices and meet customer needs. You will also support defect resolution, participate in code reviews, and continually grow your skills under the guidance and mentorship of a Senior C#/.NET Developer.\nWhat you'll do:\nDesign, develop, test, and maintain application features using C#, ASP.NET, Entity Framework, and SQL Server\nModify and enhance existing application code to improve performance, functionality, and maintainability\nIntegrate third-party components and APIs as needed\nParticipate in the full software development lifecycle, including planning, requirements analysis, implementation, testing, and deployment\nCollaborate with senior developers and architects to implement technical designs and follow established patterns and standards\nWrite clean, scalable, and maintainable code aligned with best practices and team guidelines\nConduct unit and integration testing to validate functionality and ensure code quality\nTroubleshoot and resolve technical issues, defects, and performance bottlenecks\nUse Git/GitLab for source control, branching, and code collaboration\nSupport O&M tasks such as minor enhancements, bug fixes, and performance tuning\nParticipate in code reviews and apply feedback from senior engineers to improve your technical proficiency\nAssist with remediating code and package vulnerabilities identified through scans, with senior guidance\nWhat you’ll need:\nBachelor’s degree and 8 years of software engineering experience\n3-5 years of professional experience developing software using C# and the .NET framework\nExperience with ASP.NET, Entity Framework, and SQL Server\nFamiliarity with architectural patterns and API styles (REST, RPC)\nExperience writing and executing unit tests and performing integration testing\nUnderstanding of secure coding practices and willingness to follow vulnerability remediation guidance\nAbility to collaborate with cross-functional teams and translate requirements into technical tasks\nStrong problem-solving skills and ability to work independently when implementing assigned tasks\nBonus points if you have:\nExperience with cloud platforms (AWS or Azure)\nBasic understanding of DevOps practices or exposure to CI/CD pipelines (GitLab preferred)\nExperience working with Object-Relational Mappers (ORMs) such as Entity Framework\nKnowledge of SQL or NoSQL database design principles\nExperience with containerization tools (Docker)\nFamiliarity with Agile/Scrum development processes\nRelevant certifications in .NET development or cloud technologies.\nExperience working in an Agile/Scrum development environment.\nStrong problem-solving skills and attention to detail.\nExcellent communication and collaboration skills.\nSecurity Clearance requirement:\nMust possess active TS/SCI clearance to be considered for this role.\nOther Requirements:\nU.S. Citizenship\nCompensation Spotlight: \nFor this role, our typical salary range starts at $125,000 and stretches up to $155,000. But here's the deal - we're not about capping your potential. We're committed to snapping up the best and brightest, and we're ready to put our money where our mouth is. So, if you're one of the rare exceptions to the status quo with the education, experience, and that extra something special, we're not afraid to go above and beyond to secure your talent. Because for us, it's not just about a salary. 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