Full Time Full Stack Software Developer Jobs in California

ABOUT US

At PARTNER, success starts with the right mindset: connection, compassion, and curiosity. Whether consulting with clients or collaborating with colleagues, these principles guide how we work. We deliver engineering, environmental, and energy consulting, plus design services across the Americas, Europe, and beyond. As a leader in Commercial Real Estate (CRE), we’re 1,600+ professionals strong in 40+ offices. Our mission is simple: create the best home for talented professionals. If you value delivering exceptional experiences through problem-solving, coordination, and a mindset of care for clients and colleagues, you’ll feel right at home. That approach has earned us recognition on ENR’s Top 500 Design Firms, Inc. 5000’s Fastest-Growing Companies, and Zweig’s Best Firms to Work For. Here, your ideas matter, your impact is real, and your work helps shape the future. Check out this role and join our team of talented professionals.

Learn more about Partner at www.partneresi.com

SUMMARY

Partner Engineering and Science, Inc. is seeking an experienced Senior Full-Stack Software Engineer to serve as a technical leader within our innovative Products Team. This role is centered on hands-on development, architectural decision-making, and mentoring developers to support the delivery of high-quality, scalable software applications. As a Senior Full-Stack Software Engineer, you will help modernize our systems, drive sound engineering practices, and contribute to the successful implementation of new solutions aligned with business goals. You will work closely with cross-functional partners while providing technical guidance, thoughtful code review, and day-to-day mentorship to other engineers. We use AI agentic-assisted development and are continually refining our processes to help developers be as productive and effective as possible. 
The ideal candidate has a strong software engineering background, expertise in Ruby on Rails (or similar frameworks), VueJS (or React), and experience working with cloud-hosted environments, especially AWS. You should also bring a passion for mentoring developers, driving technical excellence, and improving engineering processes. 

We are particularly interested in candidates with experience leading or contributing to production AI-enabled software, including LLM-based application features, evaluation frameworks, and the engineering patterns needed to make these systems reliable, observable, maintainable, and useful in real business workflows. 

Responsibilities and Duties 

• Software Development: Lead the design, development, testing, and deployment of software applications. Collaborate on both front-end and back-end development tasks as necessary. 
• Team Leadership: Mentor a team of software developers to ensure professional growth and technical excellence. Perform code reviews, suggest best practices, participate in architecture and design sessions, and align with design and product management. 
• System Modernization: Maintain and modernize existing systems to improve scalability, reliability, and performance. Guide the technical implementation of new features and system upgrades. 
• Collaboration: Work closely with cross-functional teams, including product managers, designers, and QA, to ensure alignment on project objectives. Serve as a liaison between technical teams and business stakeholders. 
• Continual Learning: Establish best practices for coding, testing, and deployment within the team. Promote the use of CI/CD pipelines and automation to enhance efficiency and reduce errors. Use AI-assisted development to improve workflows, from feature development to debugging and aligning on technical requirements. 
• Technical Oversight: Provide guidance on architectural decisions, engineering patterns, and tool selection. 

Required Qualifications 

• Experience: 5+ years of software development experience with increasing levels of responsibility. 
• Education: Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience. 
• Technical Skills: 
• Expertise in software development; experience with Ruby on Rails is a strong plus. 
• Experience with cloud-hosted environments, particularly AWS. 
• Proficiency with source control systems (GitHub). 
• Knowledge of CI/CD pipelines (e.g., Github Actions, Travis CI). 
• Familiarity with application monitoring tools like New Relic. 
• Exposure to JavaScript frameworks, especially Vue.js, is a plus. 

Preferred Qualifications   

• Experience designing, building, or leading production software features that use LLMs or similar AI services, with practical understanding of prompt workflows, evaluation methods, reliability concerns, and system tradeoffs. 
• Experience defining or improving evaluation approaches for AI-enabled product functionality, including quality measurement, failure analysis, and iterative refinement. 
• Experience with cloud application deployments using containerization (e.g. Docker, Kubernetes), DevOps, particularly in AWS. 
• Experience with Python for backend services, scripting, automation, data workflows, or AI-related application development. 
• Knowledge of Agile development methodologies and practices. 
• Strong understanding of testing frameworks and debugging tools 

 Soft Skills   

• Strong leadership and mentoring abilities. 
• Excellent problem-solving and analytical skills. 
• Effective communication and collaboration skills, with the ability to work cross-functionally. 
• A passion for learning, continuous improvement, and building high-quality software.