{"id":118439,"url":"https://alion.io/job/synergy-ecp-senior-net-react-full-stack-developer","title":"Senior .Net & REACT Full Stack 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":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","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":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASP.NET Core","optional":false},{"name":"C#","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Git","optional":false},{"name":"GitLab","optional":false},{"name":"JavaScript","optional":false},{"name":"Node JS","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","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":"2026-06-23T21:20:08Z","employer_posted_date":"2026-06-23","last_verified_at":"2026-10-17T18:29:22Z","board_verified":true,"closed_at":null,"days_open":115,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":115},"description":"As a .NET/React Full Stack Developer, you will play a critical role in the development and maintenance of web applications and services. You will be responsible for designing, coding, testing, and deploying high-quality software solutions using the .NET framework and associated technologies, as well as React. Your expertise in both front-end and back-end development will be essential in creating seamless and efficient user experiences. You will collaborate closely with cross-functional teams, including designers, product managers, and other developers, to deliver robust and scalable applications.\nIn this role, you will engage in the full software development lifecycle, from concept and design to testing and deployment. You will be expected to write clean, maintainable, and efficient code, and to adhere to best practices and coding standards. Your ability to troubleshoot and resolve complex technical issues will be crucial in ensuring the reliability and performance of our applications. Additionally, you will participate in code reviews, provide constructive feedback, and contribute to the continuous improvement of our development processes.\nWhat you'll do:\nExperienced with ASP.NET framework, Entity Framework, SQL Server and design/ architectural patterns (e.g. APIs with Dependency Injection)\nExperienced with .NET languages (e.g. C#, ADO.NET, EF)\nFamiliarity or experience with architecture styles/APIs (REST, RPC)\nDevelop and maintain web applications using React, TypeScript, JavaScript, Node.js and HTML5/CSS3\nDesign and implement both front-end and back-end components of the application.\nEnsure the performance, quality, and responsiveness of applications.\nCollaborate with cross-functional teams to define, design, and ship new features.\nWrite clean, scalable, and maintainable code following best practices.\nConduct thorough testing of applications, including unit, integration, and system testing.\nTroubleshoot and resolve technical issues and bugs.\nParticipate in code reviews and provide feedback to peers.\nUse Git/Gitlab for source control\nWhat you’ll need:\nBachelor's Degree\nMinimum 8 years of experience\nBonus if you have:\nExperience with front-end frameworks such as React.\nFamiliarity with cloud platforms like AWS or Azure.\nKnowledge of database design and development, including SQL and NoSQL databases.\nKnowledge of Object Relational Mappers, such as Entity Framework\nUnderstanding of DevOps practices and tools, such as CI/CD pipelines, Docker, and Gitlab.\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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