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Independent Contractor - Senior Software Engineer Compensation Paid discovery and implementation milestone before expanding the engagement. Rates, scope, availability, and collaboration hours are negotiable. Behavior One Autism Solutions provides behavioral healthcare services across Southern California. We are developing a decision-intelligence platform that connects clinical, workforce, operational, and financial information to help organizations identify problems, coordinate action, and evaluate results. We are seeking to contract a senior, hands-on software engineer to assess and advance existing project materials and prototypes into a dependable application. The work includes healthcare data integrations, staffing and scheduling workflows, revenue-leakage detection, and an underlying systems-based analytical framework. You will work directly with the founder, who provides domain expertise, business priorities, and product direction. You will translate those priorities into scoped engineering work, explain technical tradeoffs, and deliver software that another engineer can understand and maintain. Primary Job Responsibilities Assess and extend existing source code, specifications, and prototypes. Build reliable integrations with healthcare, HR, accounting, and Microsoft 365 systems. Develop data validation, reconciliation, exception-management, and reporting workflows. Deliver maintainable application features with tests, documentation, and deployment support. Work directly with the founder to translate business priorities into clear engineering milestones. Skills and Qualifications Required: 3+ years of software engineer experience. Demonstrated senior-level experience delivering and maintaining production software. Strong backend engineering, relational database, SQL, and API integration skills. Ability to build or modify the application interface needed to deliver complete workflows. Familiarity with authentication, authorization, automated testing, cloud deployment, and operational monitoring. Preferred: Bachelor's degree in computer science, computer engineering, or related field Healthcare operations, practice-management software, revenue-cycle systems, or other sensitive-data applications. Accounting and workforce-system integrations. Azure, Microsoft Graph, and Microsoft identity services. Data lineage, reconciliation systems, and explainable analytics. SaaS architecture and organizational data isolation. Evaluating AI-assisted features for reliability and measurable business value. Company Operating Hours Monday-Sunday 8:00am-8:00pm Originally posted on Himalayas