Senior Full-Stack Engineer
General InformationRequisition # 692Locations USA-VA-ArlingtonPosting Date 05/01/2026Security Clearance Required - Active Public TrustRemote Type HybridTime Type Full timeDescription & RequirementsElder Research Inc., a wholly owned subsidiary of MANTECH international Corporation seeks a motivated, career and customer-oriented Senior Full-Stack Engineer to join our team in Arlington, VA who will help lead development of the analytics platform. This is a high-ownership role: you'll drive front-end architecture decisions, contribute meaningfully to Python backend services, mentor engineers on the team, and ship complex features end-to-end.The balance between front-end and back-end work in this role evolves with the product—some sprints emphasize UI development, while others focus on Python-based pipelines and document-processing services. We’re seeking a true full-stack engineer who is equally comfortable operating across both layers and can adapt as priorities shift, rather than someone with a strong bias toward one side of the stack.As a Sr. Full-Stack Engineer, you will lead front-end architecture for a growing internal platform, driving component design, state management, routing, and performance optimization, while also contributing to Python backends that power document processing, OCR, summarization, and inference pipelines. You will build end-to-end large-scale PDF upload workflows with chunking, resumability, progress feedback, and robust error handling, supported by scalable Python services, and develop interactive prompt-guidance and conversation continuity features, including context upload and deep integration with OCR and inference systems.Responsibilities Include But Are Not Limited ToBuild and maintain strongly typed front-end components using TypeScript and React, including complex document and conversation workflows integrated with Python servicesDevelop advanced file upload interfaces with chunking, resumable flows, progress tracking, and resilient error handlingLeverage browser APIs (File API, Streams, Web Workers) and optimize front-end performanceLead front-end architecture decisions, design reviews, and establish component standardsDevelop and extend Python backend utilities for document processing, chat/inference, OCR, and pipeline orchestrationWrite Python scripts for QA automation, data validation, CI/CD, and support serverless/containerized workflowsMentor engineers, lead technical discussions, and produce clear internal documentationEnsure accessibility (WCAG 2.1 / Section 508), testing coverage, and strong GitHub/CI/CD governance practicesMinimum QualificationsExpert-level TypeScript and React, with a track record of owning complex front-end systems end-to-endStrong, production-grade Python skills: not just scripting, but building and maintaining backend utilities, integrating with microservices, and contributing to data and inference pipelinesComfort moving fluidly between front-end and backend work sprint-to-sprint without a strong preference for eitherProven delivery of large-file upload systems (chunking, resumable uploads, error recovery)Hands-on experience with browser APIs (File API, Streams, Web Workers) and front-end performance profilingExperience mentoring engineers and leading technical design discussionsStrong Git/GitHub fluency and CI/CD experienceDemonstrated accessibility experience — hands-on work with WCAG or Section 508 compliancePreferred QualificationsExperience building analytics or AI-assisted internal toolingFamiliarity with OCR and document-processing systemsExperience with serverless architectures (Lambda, S3-based pipelines)Experience in regulated or security-conscious development environmentsComfort working in cross-disciplinary teams alongside data scientists and cloud engineersClearance RequirementsMust have a current/active Public Trust at time of hire.About Elder Research, Inc - People Centered. Data DrivenElder Research considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.If you need a reasonable accommodation to apply for a position with Elder Research, please email us at careers@elderresearch.com and provide your name and contact information.