Senior Full Stack Engineer

Company Overview:

Over the past 15 years, eTel has delivered essential solutions for the federal government by securing and managing data, providing scalable identity access, modernizing legacy systems, and building high-performance platforms. By integrating new technologies and ensuring reliable operations we help agencies stay prepared for future challenges As a premier technology solutions and services company to the US federal government, eTel possesses longstanding relationships across the federal civilian marketplace. Other customers include the broader Treasury Department, Commerce Department, and State Department.

eTel offers integrated CMMI Level 3 processes, tools, and techniques with innovative, cost-efficient, and secure solutions to address complex challenges. eTel also holds ISO 9001:2015, ISO/IEC 27001:2013, and ISO/IEC 20000-1:2018 certifications, and offers dedicated subject matter experts (SMEs) and thought leaders that possess a deep understanding of customers’ environments and challenges.

Location: Farmers Branch, Texas (Hybrid – 2–3 days onsite at IRS Farmers Branch)

Citizenship: US Citizen (MUST)

Security Clearance: Must be eligible to possess MBI (IRS Background Investigation) clearance. Active MBI clearance is preferred.

Job Summary :

The Senior Full Stack Engineer serves as a technical leader responsible for designing, developing, and maintaining enterprise-scale APIs that enable secure, standardized access to IRS data across legacy and modern platforms. This role supports the full API lifecycle, from architecture and design through deployment, monitoring, and optimization, while mentoring team members and ensuring alignment with IRS enterprise standards.

Key Responsibilities :

• Lead the design and implementation of REST, GraphQL, and gRPC APIs aligned with IRS architectural standards.


• Develop and maintain backend services using modern programming languages such as Java, Python, Node.js, or Spark.


• Build and integrate frontend components as needed using frameworks such as React, Angular, or Vue.


• Define and enforce API versioning, authentication, and authorization standards using OAuth and JWT.


• Guide decomposition of legacy COBOL services and command codes into modern API-based services.


• Ensure backward compatibility, data integrity, and consistent object modeling across systems.


• Support API readiness reviews and consumer onboarding activities.


• Implement automated unit, integration, and regression testing frameworks.


• Enable observability through monitoring tools such as Datadog, New Relic, or Prometheus.


• Mentor mid-level engineers and provide technical direction across delivery teams.


• Contribute to technical documentation, API specifications, and design artifacts.

Required Qualifications :

• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience.


• 5 to 8 or more years of full stack software development experience.


• Strong experience designing and building enterprise APIs.


• Proficiency in frontend and backend development technologies.


• Experience with cloud platforms such as AWS, Azure, or GCP.


• Hands-on experience with containerization and orchestration using Docker and Kubernetes.


• Strong understanding of CI/CD pipelines, secure coding practices, and DevSecOps principles.

Commitment to Diversity -
eTelligent Group provides equal employment opportunities (EEO) to all applicants without regard to race, color, religion, gender, sexual orientation, gender identity, nations origin, age, disability, genetic information, marital status, amnesty, status as a covered veteran, and any other characteristic provided in accordance with applicable, federal, state and local laws.