Senior Full Stack Developer

MVML INC; Corona (CA); On-site; USD 140,000 - 180,000; Full time

Job summary

MVML INC. is seeking a Senior Full Stack Developer to own and advance our core monolithic application. You will lead hands-on development for new features and integrations, ensure performance and security, and partner with product and engineering to shape the technical roadmap.

The role emphasizes code reviews, data integrity, and collaboration with QA and DevOps to strengthen reliability. The ideal candidate brings 5–7 years in software development, strong AWS expertise, and production SQL

Qualifications

• 5–7 years in hands-on software development with monolithic architectures.
• Strong AWS experience and cloud-native awareness are required.
• Experience with SQL and production database work including transactions and auditing.
• Familiarity with HIPAA regulatory considerations is a plus.

Responsibilities

• Own and maintain the core monolithic application, implementing features and integrations.
• Establish monitoring, analyze data flows, and resolve performance bottlenecks.
• Safeguard data integrity with proper transactions, rollback, and audit logging.
• Review code changes and gatekeep repository contributions.
• Collaborate with product, engineering, QA, and DevOps to improve reliability.

Skills

Full stack development

Monolithic architecture

Code review

Performance optimization

AWS

Data security

API integrations

Team leadership

QA collaboration

System monitoring

Education

Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related field

Tools

Claude Code

Job description

Summary:The Senior Full Stack Developer owns the core application end-to-end — leading hands-on development of new features and integrations while balancing performance, maintainability, and security across the monolithic codebase. This role establishes application monitoring, analyzes data flows across systems and vendor integrations, and proactively resolves performance issues.A key responsibility is safeguarding production data integrity, executing database changes with proper transaction handling, rollback capability, and audit logging. As a senior contributor, this person also gatekeeps code quality by reviewing and approving team contributions, partners with product and engineering teams to shape the technical roadmap, and evaluates emerging technologies for platform fit. Working with QA and DevOps, they help define testing and deployment practices that strengthen system reliability and scalability.DUTIES & RESPONSIBILITIES:Application Ownership & Codebase ManagementOwn and maintain the core application, including hands-on management and cleanup of its monolithic architecture. Evaluate new features, enhancements, and integrations, balancing performance, maintainability, and security. Provide direct technical implementation — not just guidance — during discovery, design, development, and deployment phases. Translate business and counseling workflows into scalable, secure technical solutions.Performance and OptimizationEstablish application monitoring and data integration health checks to ensure uninterrupted workflows. Analyze end-to-end data flows between systems, the SaaS platform, and vendor integrations. Proactively identify performance bottlenecks and implement fixes directly.Database Integrity & Risk ManagementSafely perform and oversee direct production database changes — writing and executing queries and scripts using transactions, rollback capability, and audit logging so that no operation leaves data in a corrupted or unrecoverable state. Map current and future data flows, identifying risks to data integrity, privacy, and availability. Ensure compliance with privacy and security regulations and recommend best practices for secure data exchange and storage.Code Review & Repository GatekeepingReview and approve code changes from contributing team members before they are merged into the repository, ensuring quality, security, and consistency standards are met. Act as the primary gatekeeper for repository access and contributions.Technology Strategy and SolutionsCollaborate with product, engineering, and customer teams to define the technical roadmap. Evaluate emerging technologies (automation, cloud services, analytics, AI) for their applicability in advancing the platform. Provide hands-on implementation and oversight for vendor integrations, APIs, and third-party services.Quality Assurance and Continuous ImprovementPartner with QA and DevOps teams to ensure robust testing frameworks and deployment practices. Define guardrails to reduce production issues. Advocate for practices that improve system reliability, scalability, and maintainability.QUALIFICATIONS & EDUCATIONAL REQUIREMENTS:Education:Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related field.Qualifications:Experience: 5–7 years in hands-on software development, with direct experience managing, refactoring, and cleaning up monolithic application architectures.Technical Expertise: Strong background in SaaS platforms and cloud-native architecture, with required, non-negotiable hands-on AWS experience — this team must fully own and understand its own infrastructure internally, so AWS proficiency cannot be substituted with Azure/GCP experience alone. Microservices familiarity is a plus. Experience using Claude Code is essential.Team leadership experience is preferred.Database: Strong SQL experience, specifically including safe, hands-on production database work — writing and running queries/scripts with transaction control, rollback procedures, and logging to prevent and recover from data corruption.Code Review: Demonstrated experience reviewing code and gatekeeping contributions from other developers before changes are merged into a shared repository.Data & Integration: Experience designing and managing secure data flows, API integrations, and monitoring frameworks.Regulatory Awareness: Familiarity with EHR systems, healthcare data standards, and regulatory frameworks (HIPAA).