Lead Agentic Software Engineer

Reingold is a full-service marketing and creative firm in Alexandria, VA. For more than 40 years, we ve been driven by a simple mission: to help organizations -- whether in the government, nonprofit, or business sector -- as they strive to make the world a better place. We hire top-notch talent to develop and launch compelling, inventive communications campaigns, leveraging the latest technology and digital media strategies that enable our clients to meet their audiences where they are.

We re proud to say we ve built a team of curious, passionate pros --- from marketers and tech wizards to designers and strategists --- who love what they do and bring their A-game every day. We take our work seriously, but not ourselves. We believe great ideas come from collaboration, humor, and a little bit of fun along the way.

When you work at Reingold, you get more than a job, you get a community. We offer competitive salaries, a comprehensive benefits package, a dynamic hybrid work environment, a vibrant workplace and growth opportunities in a variety of specialty areas. That means when we find great people (and they find us), they stick around for the long term.

That s where you come in. Reingold is seeking a Lead Agentic Software Engineer to build the platforms our clients run on -- content management systems, e-commerce, web applications, and integrations -- and to bring AI agents and automation into that work for our government, nonprofit, and commercial clients. This is a full-time, exempt position in Reingold s Digital department, reporting to the Senior Director, Digital.

You ll spend most of your time as a hands-on, billable engineer on client projects: architecting and shipping production applications and platform builds, and applying agentic AI -- LLM-powered agents that plan, call tools, and carry out multi-step work -- to client products, delivery pipelines, and internal operations. The rest is reserved for capability building: evaluating emerging AI tools and models, developing reusable components and internal tooling, and setting engineering and quality standards that scale across teams.

It s a senior individual-contributor role that blends deep platform engineering with practical, production-grade AI.

This is a hybrid role, requiring at least two days per week on site at Reingold s headquarters in Alexandria, VA.

• Bring AI agents and automation into client products, delivery pipelines, and internal operations -- architecting agentic systems end to end: model and framework selection (e.g., Anthropic, OpenAI), tool and function calling, multi-step orchestration, context and memory, retrieval-augmented generation with embeddings and vector stores, and guardrails and fallback behavior -- choosing approaches based on accuracy, latency, and cost.
• Design, build, and ship production web applications, platforms, and integrations for client programs -- architecting the full stack across modern JavaScript frameworks (React, Type Script), server-side services, and relational and No
  
  SQL data stores.
• Define and run evaluations of agent behavior -- task success, tool-call correctness, regression, reliability, and cost -- and iterate on production systems based on measured results, holding the work to a real production bar rather than demos.
• Establish responsible-AI and data-governance practices for public-sector and regulated work: secure handling of client data, human-in-the-loop review, and safeguards against hallucination, prompt injection, data leakage, and inappropriate disclosure.
• Lead architecture and development on enterprise content management platforms -- traditional and headless alike, including Word Press, Umbraco/.NET, Adobe Experience Manager, and comparable systems -- and integrate them with AI services, third-party APIs, and client data.
• Design and build e-commerce solutions on platforms such as Adobe Commerce, Shopify, or Woo Commerce: storefront, catalog and order management, checkout and payment integration, and connections to fulfillment, CRM, and analytics.
• Deploy and operate applications on a major cloud platform: CI/CD pipelines, containerized or serverless services, monitoring, and cost management.
• Own quality on your work: build automated end-to-end, regression, and API test suites (for example with Playwright or Cypress) with CI quality gates, and implement automated accessibility testing against Section 508 and WCAG 2.1 AA (for example with axe or WAVE),…