Full Stack Developer (.NET / C# / SQL REQUIRED)

Job Description Full Stack Developer (.NET / C# / SQL REQUIRED)Location: San Diego, CA (Hybrid – 2 days onsite)Compensation: $110,000 – $120,000 + Bonus + Full BenefitsAbout the RoleWe are seeking a Full Stack Developer with strong C#/.NET and SQL expertise to join a growing team building modern, cloud-based applications in the energy sector.You will play a key role in designing and developing scalable software solutions that power both internal operations and customer-facing platforms. This is a hands-on engineering role in a collaborative, agile environment that values clean code, performance, and continuous improvement.Important – Required Technical StackThis role is specifically focused on the Microsoft stack.Candidates must have hands-on experience with:C# and .NET (6+)SQL (writing, tuning, and optimizing queries)Candidates without C#/.NET experience will not be consideredKey ResponsibilitiesDesign, develop, and maintain full-stack applications using C#/.NET and modern frontend technologiesBuild and optimize SQL queries across large and complex datasetsDevelop and integrate REST and/or GraphQL APIsCollaborate on system architecture, technical design, and code quality standardsWrite clean, maintainable, and well-tested codeParticipate in code reviews and continuous improvement initiativesWork independently while managing priorities and deadlines in a hybrid environmentContribute to cloud-based solutions hosted in AWSRequired Qualifications3+ years of professional experience in software developmentStrong hands-on experience with:C# / .NET (6+) — REQUIREDSQL (query optimization, performance tuning) — REQUIREDExperience building and consuming RESTful or GraphQL APIsExperience with modern development tools (Git, GitHub, CI/CD)Strong problem-solving skills and ability to work independentlyExcellent communication and collaboration skillsMust be authorized to work in the U.S. (no sponsorship available)Preferred QualificationsExperience with frontend frameworks such as ReactExperience working in AWS environments (Lambda, DynamoDB, or similar)Familiarity with microservices or event-driven architectureExperience building or supporting SaaS platformsAWS Certification (Solutions Architect preferred)Experience in the energy or utilities industry (a plus)Why Join Us?Work on real-world, data-driven applications in the energy sectorBe part of a team that values ownership, quality, and collaborationOpportunity to build scalable, cloud-native systemsHybrid flexibility with a strong engineering cultureWork EnvironmentHybrid role: 2 days onsite in San Diego, CACollaborative, agile team with a focus on resultsApply TodayIf you are a .NET developer with strong SQL skills looking to work on impactful software in a collaborative environment, we'd love to connect.Company DescriptionCalTek is a manufacturing, technical, engineering and IT consulting firm that has expanded its business operations from its headquarters in San Diego, throughout all of California and into Arizona, Colorado, Florida, Georgia, Texas and Washington. CalTek has staffed positions with global companies such as Siemens, Parsons, and Illumina but also works with startups with 10+ employees.Company DescriptionCalTek is a manufacturing, technical, engineering and IT consulting firm that has expanded its business operations from its headquarters in San Diego, throughout all of California and into Arizona, Colorado, Florida, Georgia, Texas and Washington. CalTek has staffed positions with global companies such as Siemens, Parsons, and Illumina but also works with startups with 10+ employees.