Demo

Senior Fullstack Engineer

Apex Systems
Irvine, CA Contractor
POSTED ON 6/24/2026
AVAILABLE BEFORE 7/16/2026
Job#: 3036488

Job Description:

HEY Everyone,

Pat From Everforth Apex here with another opportunity. Working with one of my top clients in Irvine, CA, trying to fill a Senior Software Engineering position. Its onsite 5 times a week, but the interviews are all virtual. Looking for someone that is agnostic in programming but can work both front end backend. As always my recruiter assistant Riley will give you a call if you apply, but if you need a direct line to me please send me an email at [email protected] .

Senior Software Engineer

Location: Irvine, California (Onsite)

Role Overview

We are seeking a Full-Stack Software Development Engineer for a high-impact initiative focused on improving incident management systems and operational efficiency. This role will design and deliver tools that reduce manual operational work and improve the speed and reliability of incident response processes. This is an opportunity to contribute to internal platforms that support critical engineering teams in a high-scale, fast-paced environment.

Key Responsibilities

  • Design, develop, and deliver full-stack features supporting incident management tools.
  • Build automation and tooling to reduce operational toil and improve team efficiency.
  • Contribute across the full software development lifecycle: design, development, testing, and deployment.
  • Develop backend services and APIs using Java-based frameworks.
  • Build and enhance frontend components using modern JavaScript frameworks like Vue.js.
  • Own both development and testing responsibilities for delivered features.
  • Collaborate with engineering teams through code reviews, agile ceremonies, and design discussions.

Required Qualifications

  • Prior experience as a Software Development Engineer (SDE II or higher) within a large-scale enterprise engineering environment, including its tools and coding standards.
  • Ability to work onsite in Irvine, CA.
  • 5 years of professional software engineering experience.
  • Backend-heavy full-stack engineering skills with a primary focus on Java.
  • Experience with modern frontend frameworks such as Vue.js or similar.
  • Experience building APIs, services, and distributed systems.
  • Proven ability to own and deliver features end-to-end, including both development and testing.
  • Comfortable working in highly complex, pipeline-heavy environments and agile teams.

Preferred Qualifications

  • Experience building internal tools, automation, or operational platforms.
  • Background in improving automation and efficiency.
  • Familiarity with event-driven architectures and messaging systems.
  • Knowledge of CI/CD processes and software delivery pipelines.
  • Experience with cloud-based environments.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6 months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.

© 2026 Everforth, Inc. All rights reserved.

Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex.

Salary : $80 - $90

If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Senior Fullstack Engineer?

Sign up to receive alerts about other jobs on the Senior Fullstack Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$110,730 - $135,754
Income Estimation: 
$128,617 - $162,576
Income Estimation: 
$117,033 - $148,289
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Apex Systems

  • Apex Systems Providence, RI
  • Job#: 3041500 Job Description: Design Architect Position Summary Lead the planning, design, and execution of capital construction and renovation projects. ... more
  • 4 Days Ago

  • Apex Systems Washington, DC
  • Job#: 3038145 Job Description: Apex Systems is looking for a Robotics Expert to support our client's practice! Role Overview Senior (10 year's experience) ... more
  • 4 Days Ago

  • Apex Systems Washington, DC
  • Job#: 3038130 Job Description: Apex Systems is looking for a Physical AI Expert to help innovate and lay out the roadmap for our client's Physical AI lands... more
  • 4 Days Ago

  • Apex Systems Washington, DC
  • Job#: 3037783 Job Description: If you are interested, please apply here or email an updated copy of your resume to Sara at [email protected] . Everforth Ap... more
  • 4 Days Ago


Not the job you're looking for? Here are some other Senior Fullstack Engineer jobs in the Irvine, CA area that may be a better fit.

  • EY Irvine, CA
  • Location: Anywhere in Country At EY, we’re all in to shape your future with confidence. We’ll help you succeed in a globally connected powerhouse of divers... more
  • 4 Days Ago

  • ARIA GROUP Irvine, CA
  • Job Title: Senior Engineer Location: Irvine, CA or Traverse City, MI Compensation: $100k - $140k Base salary will vary depending on job-related knowledge, ... more
  • 7 Days Ago

AI Assistant is available now!

Feel free to start your new journey!