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Mid Level Frontend Developer Jobs in Sunnyvale, CA

Clera

AI Engineer (Mid-Level)

San Francisco, CA · On-site

$180K - $400K/yr

As a Mid-Level AI Engineer on our core product team, you'll work across the full stack to ship ... frontend and backend code, and operate production systems with CI/CD, monitoring, and testing.

Clera

AI Engineer (Mid-Level)

San Francisco, CA · On-site

$180K - $400K/yr

As a Mid-Level AI Engineer on our core product team, you'll work across the full stack to ship ... frontend and backend code, and operate production systems with CI/CD, monitoring, and testing.

Hercules

Frontend Engineer

San Francisco, CA · On-site +1

$100K - $250K/yr

Hercules is looking for a senior or staff level frontend software engineer to help us build the future of AI software development What will you do? You will build and own user-facing interfaces and ...

Measurabl

Staff Software Engineer (Web)

Oakland, CA · On-site

$175 - $205/hr

We're especially interested in 1-2 engineers with strong, architect-level frontend expertise who ... junior and mid-level developers, and collaborating across teams on engineering-wide initiatives.

W3Global Inc.

Mid Level Interior Designer

San Jose, CA

$70K - $90K/yr

We work on exciting developer, corporate, and high-technology projects in Silicon Valley and we ... Role Overview We're looking for a talented mid-level Interior Designer-Mid Level This is a great ...

Anthropic

Front End Engineer, Marketing

San Francisco, CA · On-site

$300K - $320K/yr

About the role We're looking for a Front End Engineer to support our Brand Web team, working at the ... Have a track record of contributing to production web properties at a mid-level scope, and are ...

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Mid Level Frontend Developer information

See Sunnyvale, CA salary details

$49.9K

$129.6K

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

As of Aug 22, 2026, the average yearly pay for mid level frontend developer in Sunnyvale, CA is $129,586.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,100.00 and $142,000.00 per year, depending on experience, location, and employer.

What is a mid level frontend developer?

Mid Level Frontend Developers are professionals with a few years of experience building and maintaining the user-facing parts of websites or web applications. They are proficient in HTML, CSS, and JavaScript, and often work with frameworks like React, Angular, or Vue.js. Mid level developers are capable of taking on more complex features and tasks independently, collaborating with designers and backend developers, and contributing to code reviews and project planning. They bridge the gap between junior and senior roles by demonstrating problem-solving skills, code quality, and a good understanding of best practices.

What skills and qualifications are needed to thrive as a mid level frontend developer?

To thrive as a Mid Level Frontend Developer, you need strong proficiency in HTML, CSS, JavaScript, and modern frontend frameworks like React or Angular, along with a relevant degree or equivalent experience. Familiarity with version control systems (such as Git), build tools, and testing frameworks is typically required. Effective problem-solving, attention to detail, and clear communication are essential soft skills for collaborating with designers and backend developers. These skills ensure the delivery of high-quality, user-friendly web applications that meet both technical and business requirements.

What are common challenges a mid level frontend developer faces when integrating with backend services, and how can these be managed?

Mid Level Frontend Developers often encounter challenges such as handling inconsistent API responses, managing asynchronous data flows, and ensuring seamless communication between the frontend and backend. To address these issues, it's important to collaborate closely with backend developers, maintain clear API documentation, and use tools like Postman or Swagger for testing. Additionally, implementing robust error handling and utilizing state management libraries can help ensure a smooth user experience and efficient debugging.

Are mid level front end developers still in demand?

Mid level front end developers are currently in strong demand due to ongoing digital transformation and the need for user-friendly interfaces. Skills in JavaScript frameworks like React or Angular, along with knowledge of HTML and CSS, remain highly valued by employers across various industries.

What are the most commonly searched types of Frontend Developer jobs in Sunnyvale, CA?

The most popular types of Frontend Developer jobs in Sunnyvale, CA are:

What cities near Sunnyvale, CA are hiring for Mid Level Frontend Developer jobs?

Cities near Sunnyvale, CA with the most Mid Level Frontend Developer job openings:

Mid Level Frontend Developer jobs near you

AI Engineer (Mid-Level)

Clera

San Francisco, CA • On-site

$180K - $400K/yr

Full-time

Re-posted 19 days ago

Job description

About the Role

We're a small, fast-moving team building the next generation of AI-driven products that automate complex, multi-step workflows across regulated and enterprise domains — think healthcare, legal, fintech, logistics, and compliance. As a Mid-Level AI Engineer on our core product team, you'll work across the full stack to ship production LLM-based services, own critical infrastructure, and collaborate directly with founders and product to deliver real, measurable user impact.

This is a high-ownership role on a lean team. You'll touch everything from data models and APIs to agent orchestration and evaluation infrastructure — and you'll see your work in the hands of users quickly.

What You'll Do

  • Design, build, and maintain agentic systems that automate complex, multi-step workflows across regulated industries including healthcare, legal, fintech, logistics, and compliance.

  • Own production retrieval-augmented generation (RAG) pipelines and retrieval infrastructure — vector DBs, 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 closely with founders, product, and design 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 shipped, user-facing or backend products.

  • Hands-on 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 AWS or GCP and relational or NoSQL databases.

  • Working knowledge of RAG patterns, vector databases, embeddings, and retrieval pipelines with sound judgment on when to apply each.

  • Experience building automated tests, evaluations, and monitoring for AI systems to ensure production reliability beyond demos.

  • Experience designing API-driven, high-throughput systems and real-time product features.

Nice-to-haves:

  • Experience with agent or workflow frameworks (e.g., LangGraph, CrewAI) and orchestration tools (e.g., Temporal, Trigger).

  • Background building multi-tenant or enterprise-ready systems, or prior experience in regulated industries (healthcare, fintech, legal).

  • Familiarity with fine-tuning, parameter-efficient tuning, or multi-modal model integration.

  • Up to 8 years of total engineering experience — seniority range is wide; ownership mindset matters more than years.

Compensation & Benefits

  • Salary: $180,000 – $400,000 USD annually (range reflects experience and equity mix)

  • Early-stage equity in a pre-seed company with strong investor backing

  • Visa sponsorship: Not available

Location

This is an on-site role based in San Francisco, CA. Candidates must be willing to work from our San Francisco office.