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Junior React Developer Startup Jobs in Arizona (NOW HIRING)

Design, develop, and maintain Next.js / React and .NET based web applications supporting high ... Mentor junior engineers by providing technical guidance, feedback, and best practices

Design, develop, and maintain Next.js / React and .NET based web applications supporting high ... Mentor junior engineers by providing technical guidance, feedback, and best practices

Engineer

Chandler, AZ · On-site

$100K - $120K/yr

React JS, UI Developer Experience: Minimum 10 years Roles & Responsibilities A highly experienced ... Adept at mentoring junior developers, driving UI modernization initiatives, and contributing to ...

Senior Software Engineer

Phoenix, AZ · On-site +1

$121K - $160K/yr

Develop and support proprietary applications, websites, and services using React * Serve as a ... Develop new software to help modernize Healthcare IT * Mentor junior and mid-level engineers ...

Showing results 41-60

Junior React Developer Startup information

What does a junior React developer do at a startup?

A Junior React Developer at a startup is responsible for building and maintaining user interfaces using the React JavaScript library. They typically work closely with designers and other developers to implement features, fix bugs, and ensure the application's front-end is responsive and user-friendly. In a startup environment, they may also have opportunities to contribute ideas, learn new technologies, and take on additional responsibilities as the company grows.

What are some common challenges faced by junior React developers in a startup environment?

Junior React Developers in startups often encounter fast-paced work environments where priorities can shift quickly, requiring adaptability and a willingness to learn on the job. Collaboration is key, as you’ll likely work closely with designers, backend developers, and product managers to rapidly build and iterate on features. Limited resources and smaller teams mean you may take on a broader range of tasks than in larger companies, which can accelerate your learning but also present challenges in managing workloads. It's important to communicate proactively, seek feedback, and take initiative to overcome obstacles and grow your skills.

What are the key skills and qualifications needed to thrive as a junior React developer at a startup, and why are they important?

To thrive as a Junior React Developer at a startup, you need a solid understanding of JavaScript, React.js fundamentals, and basic web development concepts, typically supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, package managers (npm/yarn), and basic knowledge of RESTful APIs are usually expected. Proactive communication, eagerness to learn, and adaptability help you stand out in the fast-paced and collaborative startup environment. These skills are crucial for contributing effectively to dynamic projects, rapidly acquiring new technologies, and supporting the team’s growth.

What is the difference between Junior React Developer Startup vs Junior Front-End Developer?

AspectJunior React Developer StartupJunior Front-End Developer
Required SkillsReact.js, JavaScript, HTML, CSSHTML, CSS, JavaScript, basic frameworks
Work EnvironmentStartups, agile teams, fast-pacedVarious industries, corporate or agency settings
CertificationsBasic web development certifications, React coursesWeb development certifications, HTML/CSS courses
Industry UsageTech startups, SaaS companiesMedia, marketing, corporate firms

Junior React Developer Startup focuses specifically on React.js skills within startup environments, emphasizing JavaScript and modern frameworks. In contrast, Junior Front-End Developer is a broader role covering general front-end skills across various industries. Both roles require foundational web development knowledge, but the React Developer position is more specialized and often found in tech-driven startups.

What are popular job titles related to Junior React Developer Startup jobs in Arizona?

For Junior React Developer Startup jobs in Arizona, the most frequently searched job titles are:

What job categories do people searching Junior React Developer Startup jobs in Arizona look for?

The top searched job categories for Junior React Developer Startup jobs in Arizona are:

What cities in Arizona are hiring for Junior React Developer Startup jobs?

Cities in Arizona with the most Junior React Developer Startup job openings:

Infographic showing various Junior React Developer Startup job openings in Arizona as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution.

Mechanical Commissioning Field Trainer

Socket.dev

Chandler, AZ • On-site

$90 - $120/hr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted yesterday

New


Job description

LotusWorks is an Engineering Services provider specializing in managing Commissioning, Construction Services, Calibration, Operations & Maintenance scopes of work within global manufacturing facilities. LotusWorks operates globally across EMEA and North America partnering with the world's leading manufacturers across the Semiconductor, Pharmaceutical & Biologics, Medical Device and Data Centre sectors. Our team of Engineering and Technical professionals is immersed in cutting‑edge technologies and innovations. LotusWorks is committed to a diverse and inclusive workplace, integral to our people‑first approach.

In this role, you will provide hands‑on mechanical commissioning training and mentorship to engineers and technicians working on mission‑critical data center and advanced manufacturing projects. This is a field‑based mechanical engineering position focused specifically on mechanical systems, equipment startup, testing, functional testing, and integrated systems testing. You will partner with Commissioning Managers and Leads to develop mechanical commissioning competency across project teams. This position requires approximately 75–90% travel, including extended assignments at project locations.

Responsibilities:
  • Travel extensively between mission‑critical project locations to provide hands‑on mechanical commissioning training and mentorship.
  • Embed with project teams to train and develop junior Mechanical Commissioning Engineers and Technicians during live field commissioning activities.
  • Develop junior personnel from initial field exposure through supervised execution and independent mechanical commissioning competency.
  • Train personnel across the mechanical commissioning lifecycle, including L2 installation verification, L3 startup, L4 functional performance testing, L5 integrated systems testing, and turnover.
  • Provide field training on chillers, cooling towers, air handling units (AHUs), computer room air handlers (CRAHs), computer room air conditioning units (CRACs), pumps, heat exchangers, hydronic systems, HVAC systems, piping systems, valves, controls, and associated mechanical equipment.
  • Teach personnel to interpret mechanical drawings, P&IDs, equipment schedules, sequences of operation, specifications, equipment submittals, control diagrams, and approved settings.
  • Provide practical instruction on mechanical testing, including pressure testing, flushing, equipment startup, pump testing, valve verification, airflow and waterflow verification, temperature and pressure verification, controls testing, and functional testing.
  • Train personnel on mechanical system startup readiness and safe work practices, including LOTO/COHE, equipment isolation, stored energy hazards, PPE, and safe mechanical work practices.
  • Develop troubleshooting competency across mechanical systems, controls, communications, HVAC equipment, piping systems, and associated equipment.
  • Train personnel to identify and document mechanical installation deficiencies, QA/QC issues, commissioning defects, failed test conditions, and system readiness risks.
  • Provide instruction on mechanical commissioning documentation, including test scripts, checklists, deficiency reports, test evidence, commissioning records, and turnover documentation.
  • Coordinate with Commissioning Managers and Leads to identify upcoming mechanical commissioning activities that provide training and development opportunities.
  • Develop individual training plans and conduct field competency assessments to document technical progression and readiness for additional responsibility.
  • Identify recurring mechanical commissioning knowledge gaps and develop targeted training materials using lessons learned, troubleshooting examples, and commissioning best practices.
  • Support consistent mechanical commissioning execution, testing methodology, documentation quality, and technical standards across project locations.
  • Provide technical leadership with feedback on personnel readiness, competency gaps, training priorities, and development needs.
  • Support the development of personnel with the potential to progress into Mechanical Commissioning Engineer, Lead, and SME positions.
  • Maintain flexibility to travel approximately 75–90%, including short‑term visits and multi‑week or multi‑month project assignments.
  • Any other duties or responsibilities that may be assigned to you in your role.
Skills Required:
  • Extensive hands‑on mechanical commissioning experience within data center, semiconductor, or other mission‑critical facilities.
  • Strong knowledge of mission‑critical mechanical systems, including chillers, cooling towers, AHUs, CRAHs/CRACs, pumps, heat exchangers, hydronic systems, HVAC systems, piping systems, valves, controls, and associated mechanical equipment.
  • Strong understanding of L2–L5 mechanical commissioning, startup, functional performance testing, Integrated Systems Testing (IST), and turnover.
  • Experience performing or overseeing mechanical testing, troubleshooting, startup, and commissioning of mission‑critical mechanical systems.
  • Ability to read and interpret mechanical drawings, P&IDs, equipment schedules, specifications, sequences of operation, equipment documentation, and control diagrams.
  • Strong knowledge of mechanical LOTO/COHE, equipment isolation, stored energy hazards, and safe mechanical work practices.
  • Demonstrated ability to train and mentor Mechanical Commissioning Engineers and Technicians through hands‑on field instruction.
  • Strong communication, leadership, troubleshooting, and problem‑solving skills.
  • Ability and willingness to travel approximately 75–90% to active construction and commissioning project sites.
Education / Licenses / Certifications:
  • Bachelor's degree in Mechanical Engineering preferred.
  • Relevant mechanical trade license or certification preferred.
  • Commissioning certification preferred.
  • Proof of education, licenses, and certifications will be required where applicable.
Benefits:
  • Medical, Dental and Vision Insurance
  • Life, Short‑Term, Long‑Term Disability Insurance
  • Training and Education Assistance
  • 401k Retirement Plan
  • Extra Annual Leave with Years of Service
  • Maternity/Paternity Leave
  • Recognition Rewards

LotusWorks is an equal opportunity employer and prohibits discrimination and harassment of any kind. We are committed to creating a diverse and inclusive workplace where all employees feel valued, respected, and empowered.

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