Lead GraphQL Java Python Engineer
Rockville, MD
Category: Development
Industry: Financial Services
Reference ID: JN -042026-106551
Date Posted: 04/22/2026
Shortcut: http://careers.eliassen.com/642J9G
Description:
Hybrid 3 days onsite / 2 days remote in Rockville, MD
Our client seeks a Lead Software Engineer to integrate COTS platforms with internal systems that support investigations. The role centers on GraphQL API design, integration architecture, and middleware for secure and reliable data exchange. The engineer will lead vendor collaboration, mentor peers on best practices, and ensure performance, scalability, and maintainability. The environment includes Java, Python, Oracle, SQL Server, AWS, containers, and CI/CD.
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: $70.00 to $80.00/hr. w2
Responsibilities:
- Design, develop, and maintain GraphQL APIs to enable efficient data exchange between COTS platforms and internal systems.
- Architect scalable integration solutions connecting external products with internal databases, applications, and services.
- Build and maintain middleware, integration layers, and data pipelines for reliable system-to-system communication.
- Collaborate with COTS vendors on technical requirements, API specifications, and troubleshooting.
- Implement data mapping, transformation, and synchronization with data integrity and security.
- Mentor engineers on integration patterns and GraphQL best practices and guide technical decisions.
- Ensure integration solutions meet performance, scalability, and reliability requirements.
Experience Requirements:
- 7+ years of software engineering experience with 3+ years in enterprise system integration.
- Strong expertise in GraphQL including schema design, query optimization, resolver implementation, and federation patterns.
- Proficiency in Java and Python.
- Experience with REST APIs, OAuth 2.0, JWT, SAML, and API gateway technologies.
- Strong understanding of Oracle and SQL Server databases.
- Experience with AWS cloud services and containerization.
- Knowledge of CI/CD practices and DevOps principles.
- Experience with GraphQL federation and federated architectures (preferred).
- Background integrating case management, analytics, or enterprise software platforms (preferred).
- Experience with message brokers and event-driven architectures (preferred).
- Understanding of security best practices for API integration in regulated environments (preferred).
Education Requirements:
- Bachelor's degree in Computer Science, Software Engineering, or related field.
- Master's degree preferred.
- AWS-related certifications (preferred).
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.
If anyone reaches out to you about an open position connected with Eliassen Group, 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.
If you have any indication of fraudulent activity, please contact fraud@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