Full Stack Developer

Apex Systems; Merrifield (VA); On-site; USD 135,000 - 187,000; Full time

Job summary

Apex Systems is seeking an experienced Full Stack Developer to support a large-scale enterprise technology environment. You will design, develop, test, implement, and maintain custom software solutions across the full stack, collaborating with stakeholders to translate requirements into scalable technical outcomes.

Responsibilities include modernizing legacy applications, deploying and supporting enterprise apps, and documenting architecture and design decisions.

Qualifications

• Bachelor's degree in Computer Science, IT, or related field (or equivalent experience).
• Extensive experience developing end-to-end custom software solutions.
• Strong expertise with modern application development technologies including C#, .NET, React, JavaScript, SQL, MongoDB, MuleSoft, Azure.

Responsibilities

• Design, develop, test, implement, and maintain custom software solutions.
• Partner with stakeholders to gather requirements and translate them into technical solutions.
• Build and enhance modern web applications using current frameworks and technologies.

Skills

C#

.NET

React

JavaScript

SQL

MongoDB

MuleSoft

Microsoft Azure

Education

Bachelor's degree in Computer Science or related field

Job description

# Full Stack DeveloperApply**Job#: 3042035****Job Description:**Full Stack Developer**Apex Systems | Supporting a Leading Financial Services Organization**Apex Systems is seeking an experienced Full Stack Developer to support a large-scale enterprise technology environment. This role will focus on designing, developing, modernizing, and supporting custom applications that improve business operations and deliver innovative technology solutions. The ideal candidate will have strong experience across the full software development lifecycle and a passion for solving complex business challenges through modern application development.What You'll Do* Design, develop, test, implement, and maintain custom software solutions* Partner with business stakeholders to gather requirements and translate them into technical solutions* Build and enhance modern web applications using current development frameworks and technologies* Modernize legacy applications and migrate solutions to modern platforms* Develop technical designs, workflows, system integrations, and application architecture* Support software deployments, testing activities, and production releases* Create and maintain technical documentation throughout the software development lifecycle* Collaborate with cross-functional teams, vendors, and business partners to deliver enterprise solutions* Analyze system performance, identify process improvements, and recommend enhancements* Troubleshoot complex technical issues and drive root cause resolution* Participate in solution planning, roadmap development, and continuous improvement initiativesRequired Qualifications* Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent experience)* Extensive experience developing end-to-end custom software solutions* Strong expertise with modern application development technologies including: + C# + .NET + React + JavaScript + SQL + MongoDB + MuleSoft + Microsoft Azure* Experience developing, testing, deploying, and supporting enterprise applications* Experience modernizing legacy applications and technologies* Strong understanding of software development best practices and SDLC methodologies* Strong analytical, problem-solving, and troubleshooting skills* Ability to communicate complex technical concepts to both technical and non-technical audiences* Experience leading projects, initiatives, or technical teams* Ability to manage multiple priorities in a fast-paced environmentPreferred Qualifications* Master's degree in Computer Science, Information Technology, or a related field* Experience working within large enterprise financial services environments* Experience with portfolio management and application governance processes* Familiarity with large-scale data analysis, reporting, and forecasting methodologiesEEO EmployerApex 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. 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 Employee Services Department at [e-mail] or 844-463-6178. *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 [e-mail] 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.***Employee Type:** Contract**Location:** Merrifield, VA, US**Job Type:****Date Posted:** July 14, 2026**Pay Range:** $65 - $90 per hour