Senior Developer

NTS is seeking a Senior Developer to design, develop, test and maintain production capabilities of Stronghold, a secure AI-enabled SaaS platform. The ideal candidate has experience building modern cloud applications and AI-enabled systems as part of high-performance teams. In this role you will ensure system reliability, drive automation, maintain compliance, and act as the on-site technical lead.

• Design, develop, test and maintain production capabilities across the Stronghold platform
• Design and implement AI-enabled capabilities including RAG, information extraction, search, report generation and agentic-driven workflows
• Develop modern web application functionality across front-end/back-end and supporting services
• Review code and technical designs from other developers providing actionable feedback focused on security, maintainability and simplicity
• Mentor junior engineers and act as the on-site technical authority

• Active Secret clearance required, Top Secret preferred

• Bachelor’s degree or equivalent

• 10+ years of relevant experience
• 5+ years progressive relevant experience in software development, search engineering, or related discipline
• Experience with Type Script and Node
• Understanding of lexical search, vector search, semantic search, metadata filtering, and hybrid retrieval.
• Experience working in secure or restricted environments
• Strong troubleshooting, communication, and stakeholder management skills

• Experience working with the Department of State
• Experience with Open Search vector search, ingest pipelines, index state management, aliases snapshots, and security features.
• Hands-on experience developing and operating solutions using Open Search, Elasticsearch, or a comparable search platform.
• Experience with document extraction technologies for PDF, Office, email, html, audio, video, or scanned content.
• Experience integrating with Microsoft Graph, SharePoint, One Drive, Azure Blob Storage, network file shares, API
• Active Top-Secret clearance

The physical demands and work environment described are representative of those that an employee encounters while performing the essential functions of this job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

• Ability to sit, stand, and walk for extended periods; frequent use of hands for typing.
• Comfort operating independently across multiple customer sites; flexibility to travel up to 10%
• Comfort working in lab/workshop settings with noise, temperature changes, with rotating personnel.
• Work is performed primarily in a collaboration environment with moderate to high noise levels (multiple users, audio/video calls, co-location with related teams).
• Work occurs across lab, office, and occasional field/test environments, with conditions varying by task and event requirements.
• The environment is fast-paced and deadline-driven, requiring adaptability and responsiveness to shifting priorities.
• Support may occasionally require schedule adjustments outside normal business hours to accommodate test events, customer timelines, or mission needs.

• This is a hybrid position based in either Northern, VA or Washington, DC

The base salary range for this position is $150,000-$210,000

Actual compensation will be determined based on factors including relevant experience, qualifications, skills, location, and internal equity.

Nex Tech Solutions offers a comprehensive benefits package designed to support employees and their families, including competitive health,…