Senior Data Engineer or Backend Engineer
McLean, VA
Category: Data
Industry: Financial Services
Reference ID: JN -032026-105922
Date Posted: 03/11/2026
Shortcut: http://careers.eliassen.com/cityB2
Description:
Hybrid in McLean, VA
Our client is building an abstraction layer, API integrations, and batch data pipelines to enable seamless customer experiences while core data remains with a third-party data host. The team seeks Senior-level Data Engineers and Backend/Full Stack Engineers skilled in Python, PySpark, big data tooling, AWS, and modern software delivery. Engineers who leverage AI tools to improve speed and output will align with the project’s productivity goals. Work will focus on performant data flows, services, and infrastructure that keep downstream users insulated from future platform migrations.
We can facilitate w2 and corp-to-corp consultants. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $55.00 to $75.00/hr. w2
Responsibilities:
- Design and implement an abstraction layer that decouples downstream experiences from underlying data location.
- Build and maintain APIs and batch data flows that source data from external repositories and expose it to internal consumers.
- Develop data pipelines using Python and PySpark across big data platforms, including AWS EMR and related services.
- Stand up and harden backend services and infrastructure in AWS to support scalable and reliable delivery.
- Deliver backend features with emphasis on performance, reliability, and maintainability, with optional light front-end integration.
- Apply AI-assisted engineering practices to accelerate development, testing, and documentation.
- Collaborate with cross-functional stakeholders to ensure transparent data access and minimal disruption to users.
- Contribute to code reviews, automation, and continuous integration to improve quality and speed.
Experience Requirements:
- Senior-level experience in data engineering or backend software engineering.
- Proficiency with Python and PySpark for data processing and pipeline development.
- Hands-on experience with big data tools and AWS services such as EMR.
- Experience building and consuming APIs and managing batch data pipelines.
- Background in standing up new infrastructure and delivering software in AWS environments.
- Ability to build backend systems with some exposure to front-end frameworks such as Angular or React.
- Demonstrated use of AI tools to improve engineering throughput and quality (preferred).
- Prior experience within similar large-scale financial services environments (preferred).
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
Please be advised- If anyone reaches out to you about an open position connected with Eliassen Group, please confirm that they have an Eliassen.com email address and never provide personal or financial information to anyone who is not clearly associated with Eliassen Group. If you have any indication of fraudulent activity, please contact InfoSec@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contactInfoSec@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
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