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# Senior Software Engineer - Front End/Back End (Library of Congress)

- **Company:** Ad Hoc, LLC
- **Location:** Silver Spring, MD, United States (Remote available)
- **Experience:** Expert
- **Salary:** $120,000.0 - $140,000.0
- **Contract:** Temporary contract
- **Skills:** Adobe Analytics, Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Amazon S3, Cascading Style Sheets (CSS), Cloud Engineering, Code Review, Continuous Integration, Data Integration, Software Design Documents, Elasticsearch, Python (Programming Language), PostgreSQL, Software Engineering, SonarQube, Web Content Accessibility Guidelines, Openapi, Backend, Gitlab, Git, Event Driven Architecture, AngularJS, Integration Frameworks, Front End Software Development, Functional Programming, Cloudwatch, Restful APIs, Amazon Simple Queue Service (SQS), Terraform, Software Version Control, Legacy Systems, Microservices
- **Published:** August 29, 2026
- **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/18128293?backUrl=%2Fcareer%2F18128293%2FSenior-Software-Engineer-Front-End-Back-End-Library-Congress-Maryland-Silver-Spring

## About the Role

* 7+ years of relevant engineering experience and a Bachelor's degree, or equivalent additional experience in lieu of a degree
 * Must meet federal suitability requirements and pass a background investigation as a condition of employment
 * Expert-level proficiency in at least one of: frontend engineering (Angular, JavaScript, HTML/CSS) or backend engineering (Python, Java, PostgreSQL, Elasticsearch)
 * Strong working knowledge of containerized microservices and AWS services (ECS, RDS, S3, Lambda, CloudWatch)
 * Experience building and consuming versioned RESTful APIs with published OpenAPI specifications
 * Hands-on experience with CI/CD pipelines in GitLab and version control via Git
 * Working knowledge of WCAG 2.1 AA accessibility standards and their application to frontend or backend development
 * Strong written and verbal communication skills, able to translate technical decisions for non-technical audiences including federal agency stakeholders, * Prior experience with federal agency digital services or government contracting environments
 * Experience with infrastructure-as-code using Terraform
 * Familiarity with event-driven architectures using AWS SNS/SQS and Lambda/Step Functions
 * Experience with consumer-driven contract testing using Pact or API contract governance across microservices
 * Exposure to SAFe or scaled Agile delivery frameworks including PI planning and ART coordination
 * Familiarity with third-party integrations such as Pay.gov, login.gov, or identity/authentication platforms
 * Experience mentoring engineers in a cross-functional federal delivery environment

To learn more about working at Ad Hoc, please visit:https://adhocteam.us/join

## Description

Ad Hoc is a technology company that empowers organizations to deliver scalable, impactful digital services. Using modern, agile methods, our team creates products that meet people's needs and transform their experience of government.

Work on things that matter

Our collaborations have shaped some of the defining moments in public-sector service delivery. We've helped build products that connect Veterans to tailored services, help millions access affordable health care, and support important programs like Head Start. As we work with agencies to deliver critical services, we're also changing how the government approaches technology.

Built for a remote life

Our culture, communications, and tools are built for remote work, enabling us to bring together top talent nationwide. At Ad Hoc, remote life empowers our teams to design work environments that fit their lives and that foster flexibility and collaboration to achieve positive outcomes for our customers.

Committed to high expectations and a welcoming culture

Ad Hoc values acceptance, accountability, and humility. We aren't heroes. We learn from our mistakes and improve the process for the next time. We build small, inclusive teams to collaborate closely with our partners to solve the right problems and deliver software that works.

The Federal Civilian business unit supports many customers spanning the federal, commercial, and nonprofit space. Our customers include NASA, the General Services Administration, Office of Personnel Management, the Library of Congress, Health & Human Services, and the FDIC. We partner with these agencies to build new capabilities, deliver products, establish data as a strategic asset for informed decision-making, modernize legacy systems, and build the digital service infrastructure necessary to scale their mission impact., Senior Software Engineer - Front End/Back End serves as an experienced individual contributor within a team, with the expectation that you will further develop your leadership, guidance, and mentoring skills. With minimal oversight from leadership, you will be responsible for supporting the goal of meeting scope, schedule, and delivery requirements. A Senior Software Engineer - Front End/Back End impacts the long-term goals of the program, while contributing to the implementation of the program's development strategy. You may serve as the discipline's primary lead when working with stakeholders and utilize strong influential skills to drive improvements in software engineering processes and practices. Primary expectations of a Senior Software Engineer - Front End/Back End include:

 * Design, develop, and deploy high-quality features across frontend or backend systems within a cloud-native microservice architecture, with strong ownership of your area of the codebase
 * Enforce engineering quality standards including mandatory peer code review, SonarQube quality gate compliance, and resolving security findings in-sprint rather than deferring them
 * Build and consume RESTful APIs with versioned OpenAPI specifications, contributing to backend data integration logic using PostgreSQL and Elasticsearch or implementing user-facing features using Angular, HTML/CSS, and JavaScript
 * Lead technical design discussions, author Architecture Decision Records, and present system diagrams and design documents to engineers, product owners, and federal stakeholders
 * Diagnose and resolve production issues across systems you own, using incidents as opportunities to improve system resilience and inform team knowledge
 * Actively mentor junior and mid-level engineers, providing code review feedback and guidance that builds technical capability across the team
 * Contribute to CI/CD pipeline hygiene, infrastructure-as-code standards via Terraform, and GitLab pipeline optimization
 * Participate in technical interviews and candidate evaluations
 * May lead small, less critical, or temporary team structures and projects


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