Senior Data and Back End Engineer

Senior Data and Back End Engineer McLean, VA Type: Contract Category: Development Industry: Financial Services Reference ID: JN -032026-105923 Date Posted: 03/11/2026 Shortcut: + Description + Recommended Jobs 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 organizationu2019s 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 organizationu2019s environment or similar large-scale financial platforms (preferred). _Recruitment Transparency Notice_ _Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team (_ _ _, 781-808-2924) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Groupu2019s use of these tools, including AI tools, as part of the application and hiring process._ _Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range._ _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 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_ _ _._ _About Eliassen Group:_ _Eliassen Group is a leading strategic consulting company for human-powered solutions. For over 30 years, Eliassen has helped thousands of companies reach further and achieve more with their technology solutions, financial, risk & compliance, and advisory solutions, and clinical solutions. With offices from coast to coast and throughout Europe, Eliassen provides a local community presence, balanced with international reach. Eliassen Group strives to positively impact the lives of their employees, clients, consultants, and the communities in which they operate._ _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._ _Donu2019t miss out on our referral program If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check_

Created: 2026-03-16