Developer-Full Stack Senior

Apex Systems; McLean (VA); Hybrid; USD 69,000 - 113,000; Full time

Job summary

Everforth Apex seeks a Senior Full Stack Developer to join a fast-moving data engineering team in McLean, VA on site. You will build scalable data solutions using Python, PySpark, Spark, and AWS, enabling real-time and batch data flows.

The role requires 5+ years delivering SDLC-based solutions, strong SQL and Unix skills, and experience modernizing legacy code. Collaborative, agile mindset and accountability are essential for success.

Qualifications

• Bachelor's degree in Computer Science or Engineering or equivalent working experience.
• 5+ years of experience in delivering solutions using the Software Development Life Cycle.
• Hands-on experience with Python and PySpark.
• 3+ years of experience with complex SQL queries and Unix environment.
• Experience with legacy code and modernization projects.

Responsibilities

• Develop scalable data solutions to move data across systems in real time and in batch modes.
• Identify and deliver automated data engineering solutions using Agile practices.
• Support modernization of residual legacy applications with modern cloud tech.
• Collaborate with Product Owners and Scrum Masters to understand requirements.
• Provide production support and fix defects; participate in CI/CD practices.

Skills

Python

PySpark

SQL

Unix

Data engineering

Education

Bachelor's degree in Computer Science or Engineering

Tools

AWS

Spark

Delta Lake

Hadoop

S3

Glue

EMR

Job description

# Developer-Full Stack SeniorApply**Job#: 3052531****Job Description:**Developer-Full Stack Senior**Location:** McLean, Virginia (Onsite)Role OverviewAn opportunity is available to join a team that supports multiple IT applications built on various technologies with continuous modernization in progress. Within the Corporate Technologies - Finance Delivery Services organization, this is a multi-skilled agile team that works to discover new opportunities to implement innovative, automated, and cost-efficient solutions.Key Responsibilities* Develop scalable and reliable data solutions to move data across systems from multiple sources in real time as well as batch modes.* Identify and deliver innovative and automation solutions in data engineering, including technology implementations using an Agile construct.* While implementing technical solutions using modern cloud solutions, support residual legacy applications.* Understand business requirements and establish partnerships with stakeholders, including Product Owners and Scrum Masters.* Learn new and legacy technologies and paradigms to deploy solutions.* Utilize expertise in models that leverage the newest data sources, technologies, and tools, such as Python, Hadoop, Spark, and AWS.* Support applications, including providing fixes to production defects and making enhancements.* Evaluate defects, investigate causes, and develop solutions to address them.* Provide production support and communicate clearly on the resolution of incidents.Required Qualifications**Education:** A Bachelor’s degree in Computer Science or Engineering or equivalent working experience is required.**Experience:** This role requires 5+ years of experience in delivering solutions using the Software Development Life Cycle. Candidates must have 5+ years of relevant development experience with hands-on experience in Python and PySpark. Experience with legacy code and exposure to modernization projects is also required. Additionally, 3+ years of experience working with complex SQL queries and a Unix environment is needed.**Technical Skills:** Required skills include Python, PySpark, AWS (S3, Glue, EMR, Data lake, Delta Lake), SQL, and Unix.Preferred Qualifications* Ability to lead a team of junior developers.* Accountability, with the ability to set expectations and deliver technical solutions within an agreed-upon level of effort.* A spirit for innovation and an ability to work in a changing environment.* Ability to quickly comprehend the functions and capabilities of new technologies.* Experience in a fast-paced and constantly evolving culture.* Developed interpersonal, technical, and organizational skills.* A passion for driving value to customers and an interest in modern digital processes (Agile) and delivery (CI/CD). *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:** Mclean, VA, US**Job Type:****Date Posted:** September 17, 2026**Pay Range:** $50 - $82 per hour