Vaadin Developer Jobs in California (NOW HIRING)

Our client is seeking a highly motivated, full-time Software Engineer to join their growing engineering team. This individual will design and build applications and microservices, transforming use cases and design diagrams into production-ready code. As part of an emerging team, the successful candidate will help establish workflows and implement best practices. The role includes collaborating on design and architecture, writing maintainable technical documentation, participating in code review, and establishing deployment pipelines. This position offers a clear path toward technical leadership; as the engineer builds trust and familiarity with the company's systems, they will have the opportunity to grow into a technical lead for one of our core applications and its related microservices. Our client values deep, hands-on engineering experience and craftsmanship. AI tools are strongly encouraged as accelerators, but they are not a substitute for sound judgment, design skill, or fundamentals.

The client's primary stack today is PHP/Symfony, with Stimulus on the front end and MySQL/MariaDB for data, and supporting work in JavaScript/TypeScript, Python, Java/Spring Boot, and Amazon Redshift. As business priorities evolve, there may be opportunities to contribute to Java/Spring Boot codebases, so adaptability across language ecosystems is valued. Familiarity with these technologies—or the ability to learn them quickly—is essential.

RESPONSIBILITIES:

• Build and maintain applications and microservices in PHP, Python, and/or Java, with thorough testing, security, and privacy as guiding principles from inception.
• Own sensitive operations end-to-end, designing systems with appropriate access boundaries and safeguards from the outset.
• Create clean and robust UIs using templating engines like Twig, Mako, or Jinja, and frameworks like Stimulus, Vaadin, or Vue.js.
• Work with modern JavaScript/TypeScript using Node.js.
• Design and implement CI/CD workflows and deployment pipelines.
• Collaborate with Product to refine requirements and contribute to use cases, sequence diagrams, and design documentation.
• Collaborate effectively with near-shore and contracted developers on shared codebases.
• Perform code reviews that uphold quality, standards, and maintainability.
• Troubleshoot issues across backend, frontend, and database layers.
• Contribute to and maintain internal technical documentation and architectural diagrams.
• Mentor team members on software engineering fundamentals — testing, code structure, version control workflows, and code review practices.
• Work within Kanban and Scrum frameworks depending on project needs.

QUALIFICATIONS:

Technical Skills:

• 5+ years of professional software development experience.
• Strong experience in PHP (Symfony preferred).
• Experience developing microservices and REST APIs.
• Experience building UIs with modern templating frameworks and JavaScript/TypeScript.
• Experience with relational databases such as MySQL/MariaDB, PostgreSQL, Amazon Redshift.
• Ability to write clear, meaningful unit tests with frameworks like PHPUnit, unittest, JUnit or Jest.
• Experience with Docker and containerized application workflows.
• Knowledge of Git-based workflows, branching strategies, and pull request reviews.
• Comfortable working in Linux environments.

Soft Skills:

• Strong communication and collaboration skills within distributed, cross-functional teams.
• Reliable ownership of tasks and the ability to propel projects forward.
• Sound judgment and discretion when working with sensitive systems and data.
• Ability to identify blockers early and unblock yourself or others effectively.
• Detail-oriented approach to implementation, testing, and documentation.

Nice-to-Have Skills:

Technical:

• Working knowledge of Java (beneficial for cross-functional development and potential future projects).
• Familiarity with Python.
• Effective use of AI coding assistants to accelerate development without compromising code quality.
• Experience with AWS services such as Redshift, S3, RDS.
• Understanding of Linux/Apache configurations.
• Knowledge of caching, API optimization, and backend performance tuning.
• Familiarity with workflow automation via Apache Airflow.
• Experience tuning ML models and integrating them into applications.
• Ability to design and code within security and compliance standards.

Process & Leadership:

• Support or leadership in designing and developing new applications.
• Experience creating or maintaining design documentation (use cases, flows, sequence diagrams).
• Experience participating in or improving code review standards.
• Experience working in Agile or Kanban environments.
• Leadership qualities suited to an emerging team.

Bonus:

• Experience with healthcare financial data, CMS regulatory data, or 270/271 EDI transactions.
• Experience with cross-team or cross-time-zone collaboration.

PHYSICAL REQUIREMENTS:

• May be tasked with lifting, carrying, pushing or pulling up to 25 lbs., if able to do so.
• Must be able to sit for prolonged periods of time and walk/stand for moderate periods of time.
• Must be able to bend at the knees and waist frequently
• Must be able to repetitively use a telephone and a computer mouse and keyboard.

All employment is contingent on candidates providing at least two positive professional references from prior managers. We are looking for local candidates only. U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. We are unable to sponsor at this time. To apply for this position please visit our website at www.PsiNapse.com, and click on “Looking for Work”.Thank you for your interest. Please understand that only qualified candidates will receive a response. PsiNapse Technology, a national, workforce augmentation and solutions firm, offers competitive compensation, professional service, and customized benefits to qualified temporary and career professionals looking for employment. We are an Equal Opportunity Employer and do not discriminate on the basis of race, religion, color, gender, sexual-orientation, age, national origin, citizenship, disability, or any other protected category.bility, or any other protected category.