Principal Software Engineer
Los Angeles, CA
Category: Development
Industry: Financial Services
Reference ID: JN -072026-107846
Date Posted: 08/08/2026
Shortcut: http://careers.eliassen.com/MiNVNq
Description:
On-site in Los Angeles, CA
Our client seeks a Principal Software Engineer to lead backend services and APIs for a payment processing platform supporting prominent technology partners. The role will drive technical leadership across release engineering, DevOps pipelines, observability, reliability, and secure SDLC in an AI-enabled environment.
This is a contract to hire opportunity. Applicants must be willing and able to work on a w2 basis and convert to FTE following contract duration. 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 $76.00/hr. w2
JN -072026-107846
Responsibilities:
- Lead development of backend services and RESTful APIs for payment processing at scale.
- Drive release engineering, Azure-based DevOps pipelines, and secure SDLC practices.
- Design and optimize distributed, event-driven architectures using queues and messaging.
- Implement observability with Datadog or equivalent, including alerting and incident response.
- Own test automation frameworks and integrate suites into CI/CD.
- Advance CI/CD workflows, platform reliability, and SLA adherence.
- Collaborate with QA, Security, and Infrastructure for seamless deployments.
- Mentor engineers and promote engineering best practices.
- Translate stakeholder requirements into scalable technical solutions.
- Operate in an AI-driven SDLC and implement intelligent testing capabilities.
Experience Requirements:
- 8+ years of software engineering experience with 2+ years as a hands-on technical lead.
- Expertise in C#, .NET, SQL Server, and Azure services such as AKS, Service Bus, App Services, and Azure DevOps.
- Strong knowledge of RESTful API design, OAuth2, and microservices.
- Hands-on with queuing, multithreading, and distributed computing using Kafka, Service Bus, or MQ.
- Proven ownership of test automation frameworks beyond unit testing, integrated with CI/CD.
- Observability experience with Datadog or similar tools.
- Experience in payments or financial services with high transaction volume.
- Familiarity with GitHub Actions and container orchestration.
- Secure coding and compliance in regulated environments such as PCI DSS or SOC 2.
- Experience with Agile methodologies and tools such as JIRA.
- Preferred: fintech environment experience, peer-to-peer payments exposure, stability and release management, open-source or publications, and leadership of scalable platform practices.
Education Requirements:
- Bachelor’s degree in computer science or related field, or equivalent work experience.
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 contact fraud@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