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Mid Level React Developer Jobs in California (NOW HIRING)

Clera

AI Engineer (Mid-Level)

San Francisco, CA · On-site

$180K - $400K/yr

We're looking for a mid-level AI Engineer (2-8 years of experience) who is comfortable owning ... Python plus TypeScript/React (or equivalent), experience with cloud platforms ( AWS or GCP ), and ...

Stem Xpert

Mid-level OBIEE developer

Roseville, CA · On-site

Mid-Level OBIEE Developer Location: Roseville, CA Duration: 6 months plus possible extensions We are looking for strong OBIEE developers for an enterprise level business Intelligence endeavor. At ...

Carollo Engineers Inc.

Mid-Level Programmer

Sacramento, CA · On-site

$130K - $165K/yr

Minimum of 6 years of demonstrated ability and experience at the programmer level developing PLC code and HMI/SCADA configuration for small, medium and large size SCADA/Telemetry projects * Associate ...

Sigma Defense

1608 - Mid-level Data Engineer

San Diego, CA · On-site

$75K - $99K/yr

Sigma Defense is seeking a highly skilled Mid-level Data Engineer to support the Readiness and Effectiveness Measuring (SHAREM) support contract at Surface and Mine Warfighting Development Center ...

Sigma Defense

1608 - Mid-level Data Engineer

San Diego, CA · On-site

$75K - $99K/yr

Sigma Defense is seeking a highly skilled Mid-level Data Engineer to support the Readiness and Effectiveness Measuring (SHAREM) support contract at Surface and Mine Warfighting Development Center ...

Unto Labs

Product Engineer

San Francisco, CA · On-site

Required : • 4+ years building consumer mobile or web apps with significant user traffic. • Expert-level React and React Native skills, plus solid TypeScript. • Experience building developer ...

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All JobsMid Level React Developer JobsMid Level React Developer Jobs in California

Mid Level React Developer information

See California salary details

$39.5K

$127.7K

$156.4K

How much do mid level react developer jobs pay per year?

As of Aug 8, 2026, the average yearly pay for mid level react developer in California is $127,654.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,600.00 and $154,900.00 per year, depending on experience, location, and employer.

What does a mid level React developer do?

A Mid Level React Developer builds and maintains web applications using the React JavaScript library. They are responsible for developing user interfaces, optimizing application performance, and collaborating with designers and back-end developers to deliver seamless user experiences. Mid Level React Developers often write reusable components, manage application state, and ensure code quality through testing and code reviews. They are expected to have a solid understanding of React concepts, JavaScript ES6+, and related tools like Redux, Webpack, or Babel.

What are the key skills and qualifications needed to thrive as a mid level React developer?

To thrive as a Mid Level React Developer, you need strong proficiency in JavaScript, React.js, HTML, and CSS, often supported by a relevant degree or equivalent experience. Familiarity with development tools such as Git, RESTful APIs, and build systems like Webpack or Babel, as well as knowledge of testing frameworks, is typically expected. Effective problem-solving, teamwork, and communication skills help developers collaborate efficiently and adapt to evolving project requirements. These abilities are crucial for building scalable, maintainable applications that meet user needs and business goals.

What are some common challenges faced by mid level React developers when working on larger projects, and how can they be addressed?

Mid-level React developers often encounter challenges such as managing complex component hierarchies, ensuring consistent state management, and maintaining code readability as projects scale. To address these, developers should familiarize themselves with established patterns like Redux or Context API for state management, adopt reusable component structures, and follow best practices for code organization. Regular code reviews and collaborating closely with senior developers and designers also help ensure code quality and project alignment.
What are the most commonly searched types of React Developer jobs in California? The most popular types of React Developer jobs in California are:
What cities in California are hiring for Mid Level React Developer jobs? Cities in California with the most Mid Level React Developer job openings:
Mid Level React Developer jobs near you
Infographic showing various Mid Level React Developer job openings in California as of August 2026, with employment types broken down into 66% Full Time, 26% Part Time, 2% Temporary, and 6% Contract. Highlights an 93% Physical, 3% Hybrid, and 4% Remote job distribution, with an average salary of $127,654 per year, or $61.4 per hour.

AI Engineer (Mid-Level)

Clera

San Francisco, CA • On-site

$180K - $400K/yr

Full-time

Re-posted 5 days ago

Job description

About the Role
We're a pre-seed AI-powered HR tech startup based in San Francisco, building the next generation of intelligent talent-matching products. Our core product team is small, fast-moving, and deeply technical - you'll work shoulder-to-shoulder with founders, product, and design to ship agentic systems that automate complex, multi-step workflows across regulated and enterprise domains.
We're looking for a mid-level AI Engineer (2-8 years of experience) who is comfortable owning production systems end-to-end, from data model to deploy and monitoring, and who thrives in an environment where pragmatic engineering judgment matters as much as technical depth.
Visa sponsorship is not available for this role.
What You'll Do
  • Design, build, and maintain agentic systems that automate complex, multi-step workflows across domains such as healthcare, legal, fintech, logistics, and compliance.
  • Own production retrieval-augmented generation (RAG) pipelines and retrieval infrastructure - including vector databases, embeddings, and indexing - for domain-specific search at scale.
  • Implement multi-agent orchestration, tool-calling, memory, and reasoning components to deliver robust AI-driven user experiences.
  • Develop evaluation and safety infrastructure to measure model performance, surface regressions, and enforce enterprise-level trust and reliability.
  • Ship full-stack AI products from MVP to enterprise-grade: design APIs and data models, implement frontend and backend code, and operate production systems with CI/CD, monitoring, and testing.
  • Collaborate cross-functionally to prioritize work, define success metrics, and iterate based on user feedback and telemetry.
What We're Looking For
Must-haves:
  • 2+ years of software engineering experience with a track record of shipping user-facing or backend products.
  • Practical experience deploying LLMs or LLM-based services in production, including prompt design, orchestration, and tool integration.
  • Full-stack proficiency: Python plus TypeScript/React (or equivalent), experience with cloud platforms (AWS or GCP), and relational or NoSQL databases.
  • Working knowledge of RAG patterns, vector databases, embeddings, and retrieval pipelines, with sound judgment to choose appropriate approaches.
  • Experience building automated tests, evaluations, and monitoring for AI systems to ensure reliability beyond demos.
  • Experience designing API-driven, high-throughput systems and real-time product features.

Nice-to-haves:
  • Experience with agent or workflow frameworks such as LangGraph or CrewAI, and orchestration tools such as Temporal or Trigger.
  • Background building multi-tenant or enterprise-ready systems, or experience in regulated industries (healthcare, fintech, legal).
  • Familiarity with fine-tuning, parameter-efficient tuning, or multi-modal model integration.
Compensation & Benefits
  • Salary: $180,000 - $400,000 USD annually (inclusive of equity where applicable)
  • Early-stage equity opportunity
  • High-ownership, high-impact role on a lean, experienced core team
Location
This is an on-site role based in San Francisco, CA. Candidates must be located in or willing to relocate to the San Francisco Bay Area. Visa sponsorship is not available.

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