Senior Data and Back End Engineer
McLean, VA
Category: Development
Industry: Financial Services
Reference ID: JN -032026-105923
Date Posted: 03/11/2026
Shortcut: http://careers.eliassen.com/nVNxa1
Description:
Hybrid in Mclean in McLean, VA
The organization is assembling a senior engineering cohort to accelerate Personal Loans Phase 2, focusing on building an abstraction layer and reliable data flows while core data remains with a partner. The team will include data engineers and back end engineers delivering Python, PySpark, Golang, and AWS-based solutions with an emphasis on fast, high-quality output. Work includes APIs, batch data pipelines, and standing up new infrastructure to make future data migrations transparent to downstream users. Candidates who leverage AI developer tools to improve productivity will align well with delivery expectations.
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 $80.00/hr. w2
Responsibilities:
- Design and implement an abstraction layer for data that remains with an external source, ensuring transparent future migration.
- Build and maintain APIs and batch data flows to support customer experiences and downstream consumers.
- Develop and optimize data pipelines using Python, PySpark, and big data frameworks on AWS.
- Stand up and harden back end services and cloud infrastructure, primarily in AWS.
- Deliver software increments quickly with reliable testing, monitoring, and documentation.
- Collaborate with cross-functional teams to integrate experiences from Personal Loans into the organization’s ecosystem.
- Leverage AI development tools to improve code quality, speed, and maintainability.
- Contribute to best practices for data engineering, security, and cost efficiency.
Experience Requirements:
- Senior-level experience in data engineering with Python and PySpark.
- Hands-on experience with AWS big data tools and services such as EMR.
- Proficiency building APIs and batch data pipelines at scale.
- Strong back end engineering with Python or Golang and AWS.
- Experience standing up new cloud infrastructure and shipping software quickly.
- Familiarity with front end frameworks such as Angular or React (preferred).
- Experience using AI developer tools such as Claude or Windsurf to improve productivity (preferred).
- Prior experience within the organization’s environment or similar large-scale financial platforms (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:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above