Lead Backend Engineer for Payments Platform & AI SDLC

Eliassen Group; Los Angeles (CA); On-site; Confidential; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

401k with company matching

Life insurance

Job summary

Eliassen Group seeks a Principal Software Engineer to lead backend services and RESTful APIs for a payment processing platform in Los Angeles. This on-site role focuses on technical leadership across release engineering, DevOps pipelines, observability, reliability, and secure SDLC in an AI-enabled environment.

This contract-to-hire opportunity requires strong C#, .NET, SQL Server and Azure skills, plus mentorship of engineers and guidance on scalable fintech integrations.

Qualifications

• 8+ years of software engineering experience with 2+ years in a technical lead role.
• Proficiency with C#, .NET, SQL Server, and Azure cloud solutions.
• Strong understanding of RESTful API design, OAuth2, and microservices.
• Familiarity with DevOps tools such as GitHub Actions.
• Knowledge of queuing mechanisms, multithreading, multitasking, and distributed computing.
• Experience with containers, release automation, and observability tools such as Datadog.
• Secure coding practices and compliance workflows in regulated environments (e.g., PCI DSS, SOC 2).
• Strong analytical, multitasking, and organizational skills.
• Experience with Agile methods and tools such as JIRA.

Responsibilities

• Analyze, design, program, debug, and modify software enhancements and new products across local, networked, cloud, or internet applications.
• Develop backend services and RESTful APIs supporting platform operations, release engineering, DevOps pipelines, and integrations.
• Collaborate with QA, Security, and Infrastructure to ensure reliable deployments and performance.
• Lead initiatives to improve CI/CD workflows, observability, and platform reliability.
• Implement monitoring and alerting to meet SLAs and enable rapid incident response.
• Mentor engineers and promote best practices across the domain.
• Translate platform requirements into scalable technical solutions with stakeholders.
• Operate in an AI-driven SDLC and leverage AI code assistants.
• Implement intelligent testing frameworks that auto-generate tests, predict defects, and enable self-healing.
• Lead test automation frameworks using standard tools for REST-based APIs on Azure.
• Integrate test suites into CI/CD pipelines.
• Lead test strategy, planning, and execution for functional, integration, system, end-to-end, accessibility, database validation, and automation.

Skills

C#

.NET

SQL Server

Azure

RESTful API design

OAuth2

microservices

DevOps workflows

Agile/JIRA

Education

Bachelor's degree in Computer Science or related field

Tools

GitHub Actions

Datadog

Job description

Eliassen Group seeks a Principal Software Engineer to lead backend services and RESTful APIs for a payment processing platform in Los Angeles. This on-site role focuses on technical leadership across release engineering, DevOps pipelines, observability, reliability, and secure SDLC in an AI-enabled environment.

This contract-to-hire opportunity requires strong C#, .NET, SQL Server and Azure skills, plus mentorship of engineers and guidance on scalable fintech integrations.