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Part Time React Developer Jobs in California (NOW HIRING)

Lancesoft

Software Engineer-Developer 4

Seal Beach, CA · On-site

$66.46 - $75.96/hr

... and Javascript/React • Experience with databases, Linux, and mTLS Education / Experience ... Additional Information Full Time / Part Time / On Call: Full time Shift: First Start Time: 8: 00 AM ...

Booz Allen Hamilton, Inc.

Software Engineer

San Diego, CA · On-site

$86.90K - $198K/yr

As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... Experience with Java, Python, C#, C/C++, .NET, JavaScript, React, and NodeJS * Master's degree ...

Lancesoft

Software Engineer-Systems 5

Seal Beach, CA · On-site

$96.75 - $110.57/hr

HTML, CSS, JavaScript, JS frameworks (REACT, Open Layers, etc.), Spring Framework, Hibernate, RDBMS ... Part Time / On Call: Full time Shift: First Start Time: 8: 00 AM End Time: 4: 30 PM Does this ...

iFLY

STEM Educator ($40/hr)

Ontario, CA · On-site

$40/hr

... part-time, flexible position. Majority of field trips occur Monday - Friday in the AM. iFLY has ... react positively to rapidly changing circumstances Ideal: * Graduate Degree in science, engineering ...

iFLY

STEM Educator ($40/hr)

Roseville, CA · On-site

$40/hr

... part-time, flexible position. Majority of field trips occur Monday - Friday in the AM. iFLY has ... react positively to rapidly changing circumstances Ideal: * Graduate Degree in science, engineering ...

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How much do part time react developer jobs pay per year?

As of May 29, 2026, the average yearly pay for part time react developer in California is $108,967.00, according to ZipRecruiter salary data. Most workers in this role earn between $102,600.00 and $119,400.00 per year, depending on experience, location, and employer.

What is a Part Time React Developer job?

A Part Time React Developer is responsible for building and maintaining user interfaces using React.js while working fewer hours than a full-time developer. They typically collaborate with teams to develop web applications, fix bugs, and optimize performance. This role is ideal for freelancers, students, or professionals looking for flexible work arrangements. Responsibilities may vary based on the company but generally include writing clean code, integrating APIs, and ensuring responsive design.

What are the key skills and qualifications needed to thrive in the Part Time React Developer position, and why are they important?

To thrive as a Part Time React Developer, you need strong proficiency in JavaScript, React.js, HTML, and CSS, often supported by a relevant degree or self-taught expertise in web development. Familiarity with version control tools like Git, RESTful APIs, and sometimes cloud platforms or front-end testing frameworks is commonly needed. Effective self-management, clear communication, and the ability to quickly adapt to changing requirements are valuable soft skills in this role. These skills and qualities ensure you can efficiently deliver high-quality code, collaborate remotely, and meet project goals within part-time constraints.

What does a typical work week look like for a Part Time React Developer?

As a Part Time React Developer, your work week usually involves 10–30 hours split between coding user interfaces, fixing bugs, reviewing pull requests, and joining brief team meetings—often conducted remotely. Depending on the company’s workflow, you may interact with designers, back-end developers, or product managers to clarify requirements and ensure smooth integration of features. The pace is generally collaborative and task-oriented, allowing for flexibility in scheduling as long as deadlines are met. This role is great for developers looking for work-life balance or students and freelancers seeking to expand their portfolio. You'll still be expected to deliver professional, maintainable code and communicate proactively to keep projects moving forward.
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Frontend Systems Developer (contract)

Frontend Systems Developer (contract)

Atomic Machines

Emeryville, CA • Hybrid

$90 - $120/hr

Part-time

Posted 18 days ago

Job description

Atomic Machines is ushering in a new era of micromanufacturing with its Matter Compiler™ technology platform. This platform enables new classes of micromachines to be designed and built by providing manufacturing processes and a materials library that are inaccessible to semiconductor manufacturing methods. It unlocks MEMS manufacturing not only for device classes that could never be produced by semiconductor methods, but also for entirely new categories. Furthermore, this digital platform is fully programmable in the way 3D printing is digital—but whereas 3D printing produces parts of a single material using a single process, the Matter Compiler™ technology platform is a multi-process, multi-material system: bits and raw materials go in, and complete, functional micromachines come out. The Atomic Machines team has also created an exciting first device—made possible only through the Matter Compiler™ technology platform—that we will be unveiling to the world soon.
Our offices are in Emeryville and Santa Clara, California.
About The Role

In this role you will help maintain and extend a web-based visual graph editor for manufacturing workflows. Users create and connect nodes representing materials/workpieces/tools and manufacturing steps (processes/inspections), validate the resulting workflow against catalogs and strict data contracts, and export a schema-compliant JSON representation for downstream tooling.

This role blends UI engineering with data integrity work. The editor must stay responsive on large graphs, preserve correctness (IDs, validation, export format), as well as support collaboration workflows through version control integrations.

This is a part-time, hybrid, freelance/contract role. Hours:

  • 1st 60 days: 20-40 hours per week
  • Ongoing: 10-20 hours (minimum) per week
What You'll Do
  • Build and maintain a React + TypeScript UI for a graph editor (node/edge creation, selection, multi-select, drag/drop, property panels)
  • Implement schema-driven validation and export (JSON Schema / AJV), ensuring stable, backwards-compatible outputs as schemas evolve
  • Improve performance and reliability for large graphs (rendering, minimizing re-renders, preventing UI jitter, safe persistence)
  • Support workflows around identity/ID rules, including ID generation, transformations on copy/paste/import, and "minting/locking" behaviors that freeze certain fields once finalized
  • Maintain integrations used in real production workflows:
    • GitLab API (branching, committing files, MR workflows)
    • Methods API (catalog sync, offline fallback, validation that blocks pushes when API is down)
    • Authentication (Okta)
  • Ship small-to-medium features end-to-end: UI, state changes, validation, tests, and docs
  • Triage bugs from real users (manufacturing/process engineers), reproduce quickly, and implement safe fixes
  • Add/maintain unit tests (Jest + TS) around tricky logic (ID transformation, export validation, API sync behavior)
  • Keep the build/lint/test pipeline healthy (Vite, TypeScript, ESLint, Jest) and handle dependency upgrades carefully
  • Collaborate asynchronously with a cross-functional team (process, production, AI) through clear PRs, strong commit hygiene, and pragmatic technical decisions
  • Tools/Stack You'll Work With: React 18, TypeScript, Vite, Tailwind CSS, ReactFlow, AJV (JSON Schema), Jest, ESLint, GitLab API, OpenAPI, Okta
What You'll Need
  • Experience building complex, stateful UI systems (not CRUD/dashboard apps)
  • Strong React + TypeScript with state management + performance optimization
  • Experience with graph/diagram editors or similar interaction-heavy UIs
  • Experience with large in-memory data + UI/data synchronization
  • Experience with validation systems + deterministic outputs (schema, exports)
  • Strong debugging in complex systems + ability to explain tradeoffs
  • Experience leading complex, ambiguous problems across cross-functional teams with multiple stakeholders
Bonus Points For:
  • Manufacturing background (MES, process planning, CAD/CAM adjacent tooling, "recipes/methods/catalog" concepts)
  • JSON Schema / AJV experience and comfort with strict data contracts
  • GitLab API experience, auth systems (Okta/OIDC), or "internal tool" deployment constraints
Hourly Rate Range
$90—$120 USD