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34 junior frontend developer jobs at 25 companies in Fairfield, CA

PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Frontend Engineer
San Francisco, California, United States
$150k-$200k/yr OnsiteFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
2+ YOE2+ years software development; experience defining frontend architecture; hands-on Kubernetes; APIs/backend experience; background in systems or distributed systems.
Kubernetes, Grafana, WebSockets, GitOps
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1mo
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Frontend Developer (React) Junior/Mid
San Francisco, California, United States
RemoteFull Time
CareerSwift
CareerSwift: AI-powered recruitment and job search automation platform
3+ YOERequires 3+ years with React, JavaScript/TypeScript, modern CSS frameworks, and REST/GraphQL API integration; experience optimizing UI performance and collaborating with designers/backend engineers.
React, JavaScript, TypeScript, REST, GraphQL, CSS
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1mo
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Senior Frontend Engineer
San Francisco or New York City
$150k-$250k/yr OnsiteFull Time
Halliday
Halliday: Unified crypto payment infrastructure and agentic workflow protocol for blockchain.
2+ YOE2+ years building production frontends with React and TypeScript, strong frontend fundamentals (state management, API integration, responsive design, performance), product mindset, collaboration skills, and willingness to be based in SF Bay Area or NYC.
React, TypeScript, Workflow Protocol, ethers.js, viem, wagmi
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3w
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Frontend Engineer, Autonomous Traffic Control
Houston or San Francisco
OnsiteFull Time
Bot Auto
Bot Auto: Operates a fleet of autonomous trucks for freight transportation.
0+ YOEBachelor's degree or equivalent, 0-3 years full-stack experience with frontend expertise. Proficiency in React, TypeScript, Vite, Tailwind; familiarity with Python/Go/Java/Node.js, REST and real-time systems.
React, TypeScript, Vite, Tailwind, Python, Go, Java, Node.js, REST, WebSockets, MQTT, NATS, Kafka, Mapbox, deck.gl, Leaflet, Docker, Kubernetes, AWS
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3mo
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AI Frontend Engineer
San Francisco, California, United States
$140k-$205k/yr OnsiteFull Time
Klarity
Klarity: Uses AI to map, structure, and automate enterprise workflows.
2+ YOE1-2 years of shipping production code or strong portfolio from exceptional grads.
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2mo
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Front-End Engineer
Oakland, California, United States
$90k-$120k/yr HybridFull Time
Dutch
Dutch: Providing virtual veterinary consultations and prescription services for pets.
1+ YOEBachelor's degree (any) with 1 year front-end experience; strong JS (ES6+), TypeScript, CSS; Vue.js; Shopify; REST/GraphQL; Git; HTML.
JavaScript, TypeScript, CSS, Vue.js, Shopify, REST API, GraphQL, Git, HTML
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1mo
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Software Engineer, Front-End
San Francisco or Seattle
$164k-$284k/yr HybridFull Time
Superhuman
Superhuman: An AI-native productivity platform for email, writing, and collaboration.
7+ years front-end experience with TypeScript/JavaScript, React, HTML/CSS; strong UI/UX focus; experience with AI features; familiarity with CI/CD; ability to work independently; mentor junior engineers.
TypeScript, JavaScript, HTML, CSS, React
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3w
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Software Engineer | Frontend
Lisbon or San Francisco or Sunnyvale or Raleigh or Seattle or Boston or London or Bangalore or Dublin or Kyiv or Portugal
OnsiteFull Time
SingleStore
SingleStore: Provides a distributed SQL database for real-time analytics.
2+ YOEFrontend engineer with 2+ years on a SaaS product; strong experience with React and TypeScript, browser application architecture, and familiarity with backend languages (Golang, Python, Rust) is a plus.
React, TypeScript, Golang, Python, Rust, SQL
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1mo
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Software Engineer, Product Experiences
San Francisco or Washington
$160k-$220k/yr OnsiteFull Time
Peregrine
Peregrine: Data integration and analytics platform for public safety agencies.
2+ YOE2+ years building production user-facing software; strong React/TypeScript frontend skills; full-stack experience; degree in CS or equivalent; experience with distributed systems and product-focused development.
React, Redux, TypeScript, Mapbox, Python, Django, Celery, Airflow, Kafka, PostgreSQL, Elasticsearch, Bedrock, Sagemaker, AWS, Pulumi, Terraform, Kubernetes
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1mo
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Product Engineer
San Francisco, California, United States
OnsiteFull Time
Goodfire
Goodfire: Developing tools to interpret and steer artificial intelligence systems.
2+ YOE2+ years building production software; full‑stack depth in frontend, backend, systems, or infrastructure; strong product judgment; collaboration with research, design, and customer teams; focus on model interpretability.
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2d
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Software Engineer
United States or San Francisco
$96k-$169k/yr HybridFull Time
Ethos
EthosNasdaq: LIFE: Provides an online platform for instant life insurance coverage.
2+ YOE2-5 years software engineering experience; full-stack JavaScript/TypeScript, Node or Python; frontend (HTML,CSS,React); API design, security, testing, and feature-flag/A-B experience.
Javascript, Typescript, Node, Python, Optimizely, HTML, CSS, React, Claude Code, Cursor, Copilot, Iterable, Twilio, Salesforce, Regal, Webpack
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2w
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Software Engineer, Product
San Francisco or New York City
$141k-$225k/yr HybridFull Time
Pave
Pave: Cloud-based software for managing and benchmarking employee compensation.
2+ YOE2+ years engineering experience (full-stack, backend, or frontend); experience with TypeScript and Node.js preferred; strong product instincts, collaboration, and execution focus; B2B SaaS experience a plus.
TypeScript, Node.js
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2w
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Full-Stack Software Engineer
United States or San Francisco
RemoteFull Time
Concentrate AI
Concentrate AI: Provides an AI gateway for managing LLM model access.
2+ YOE2+ years experience; strong TypeScript and Node.js skills; frontend experience with React/Next.js; PostgreSQL schema and query knowledge; Docker, CI/CD, JWT/OAuth, testing discipline; familiarity with Fastify and modern frontend tooling.
TypeScript, Node.js, React, Next.js, Tailwind, Fastify, PostgreSQL, Docker, CI/CD, JWT, OAuth, Kysely, Drizzle, Redis, Nginx, Turborepo, Nx, OpenAI
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1mo
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Software Engineer - Product (New Grad)
San Francisco, California, United States
$130k-$150k/yr OnsiteFull Time
Julius
Julius: Conversational AI for automated data analysis and visualization.
Experience with React, Next.js, Tailwind CSS, Python; shipped production code; strong frontend and backend understanding; live projects.
React, Next.js, Tailwind CSS, Python
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2w
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Founding Design Engineer
San Francisco, California, United States
$150k-$250k/yr OnsiteFull Time
Hikinex
Hikinex: Provider of outsourced sales and administrative business solutions.
1+ YOE1+ year experience (1–5 years) shipping frontend React/TypeScript, portfolio or product with real users, experience at early-stage startups, familiarity with design systems, and a Design/Arts/CS degree.
React, TypeScript, Figma, Tailwind CSS, Next.js
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2mo
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Founding Software Engineer
San Francisco or United States
$140k-$180k/yr RemoteFull Time
Recourse
Recourse: Building AI-powered claims intelligence software for healthcare arbitration.
2+ YOE2+ years building production software; full-stack exposure; hands-on AI/LLM integration; experience with TypeScript/Node, Python, SQL, and modern frontend frameworks; strong ownership and product judgment; regulated environment experience a plus.
Claude, Claude Code, Cursor, TypeScript, Node, Python, SQL, HL7/FHIR
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3mo
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Software Engineer, Fullstack
San Mateo or Chicago or Louisville
$125k-$160k/yr OnsiteFull Time
Treehouse
Treehouse: Installs residential EV chargers and home battery backup systems.
2+ YOEBachelor's in CS or equivalent experience; 2+ years frontend and 2+ years server-side experience; strong JavaScript and modern JS framework skills; cloud and SQL experience preferred.
JavaScript, Node.js, Java, Python, Scala, C#, C++, Go, React, Angular, VueJs/Ember, AWS, Azure, GCP, Docker, Kubernetes, SQL
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1mo
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Full Stack Product Engineer, AI Enabled Products
San Francisco or New York City or Colorado or United States
$130k-$175k/yr RemoteFull Time
Solv Health
Solv Health: Connects patients with same-day doctor appointments and urgent care.
2+ YOE2+ years building and maintaining production web applications; comfortable across frontend and backend; experience with React, Python, and SQL/Postgres; experience using AI-assisted development tools; strong testing, debugging, and collaboration skills.
React, Remix, Python, FastAPI, Postgres, SQL
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2w
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Software Engineer, AI Product Insights
San Francisco, California, United States
$188k-$254k/yr HybridFull Time
Mixpanel
Mixpanel: Provides an event-based analytics platform for tracking user behavior.
2+ YOEBachelor's degree or equivalent experience, 2+ years professional software engineering experience; strong full-stack fundamentals across frontend, backend, and data layers; excellent debugging, communication, and collaboration skills; experience with AI/LLMs a plus.
React, TypeScript, Django, Python, LLMs, TimesFM, Slack
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2mo
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Software Engineer Intern
San Francisco, California, United States
OnsiteFull Time
Phonely
Phonely: AI-powered voice platform for automated customer phone interactions.
Pursuing or recently completed degree in Computer Science or related field; experience with JavaScript/TypeScript and modern frontend frameworks; familiarity with Next.js; strong problem-solving and debugging skills; ability to work with customers and teammates; eager to learn quickly.
JavaScript, TypeScript, React, Next.js, Python, AWS, GCP, Kubernetes, Redis, Datadog
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