---
title: 'Senior Full Stack Software Engineer at Quartermaster'
canonical: 'https://feeny.ai/job/senior-full-stack-software-engineer-quartermaster-arlington-8z6j599dbz90'
type: 'job'
last_seen: '2026-11-04'
---

# Senior Full Stack Software Engineer at Quartermaster

- **Company:** Quartermaster
- **Location:** Arlington, VA
- **Compensation:** $210k–$260k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-07-17
- **Last confirmed live:** 2026-11-04
- **Apply:** https://jobs.ashbyhq.com/quartermaster/5d430c41-72b2-42c3-8a2b-74e0eb2e1cdd

## Job description

## About Us

Quartermaster is building the world's most comprehensive maritime intelligence platform. Our SmartMast™ system transforms commercial and civilian vessels into a persistent, distributed sensing network—combining HD video, AI, radar, RF sensing, and AIS to deliver real-time maritime domain awareness at global scale. With 600+ sensors deployed across 25+ countries and more than 400,000 vessels identified outside of AIS, we are setting a new standard for what ocean surveillance and safety can look like. We are a mission-driven, high-velocity team building dual-use technology for defense agencies, coast guards, and commercial maritime operators.

Job Description We are looking for a Senior Full Stack Software Engineer to help us build and scale the Quartermaster product—the operator-facing application used by defense analysts, coast guard operators, and commercial fleet managers to monitor, query, and act on maritime intelligence in real time. You will own features end-to-end, from backend geospatial fusion to React components, and your work will directly shape how our customers interact with data collected from sensors spanning the globe. You should be able to work asynchronously across a distributed team.

## Key Responsibilities

- Design, build, and ship full-stack features across our React web portal and Spring backend services.
- Develop and maintain versioned RESTful APIs that surface sensor data, vessel telemetry, and AI detection outputs to end users.
- Architect and evolve our microservices layer running on AWS, ensuring reliability, scalability, and low latency under high-throughput data conditions.
- Optimize PostGIS queries and data access patterns to support bulk artifact retrieval, map rendering, and time-series analysis across hundreds of vessels.
- Build internal admin and fleet management tools that help our operations team configure, monitor, and support deployed SmartMast units.
- Collaborate closely with our design team to implement pixel-precise UI components for data-dense map views and sensor visualizations.
- Participate in on-call rotations and take ownership of service reliability and incident response for your services.
- Review code, mentor engineers, and raise the technical bar for the team.

## Qualifications (Preferred)

- 5+ years of professional full-stack software engineering experience.
- Strong command of React and modern JavaScript/TypeScript for building complex, stateful web applications.
- Solid backend chops in Spring Boot; experience designing and building REST APIs at scale.
- Hands-on experience with PostGIS document databases; able to design schemas and write performant queries.
- Working knowledge of AWS services (S3, Lambda, ECS/EKS, IoT Core, CloudWatch) and infrastructure-as-code tooling.
- Experience with microservices architecture, containerization (Kubernetes), and CI/CD pipelines.
- Ability to read and reason about complex data flows involving real-time streams, large media assets, and geospatial coordinates.
- Strong written and verbal communication skills.
- Bonus Points:
- Experience with geospatial data, mapping libraries (Mapbox, Leaflet, [Deck.gl](http://Deck.gl)), or AIS/vessel tracking systems.
- Familiarity with WebSockets or SSE for real-time UI updates.
- Background in defense, maritime, or government software with exposure to data security requirements.
- Experience integrating ML model outputs into user-facing product features.

Work Environment

- Distributed team environment working asynchronously.
- Start-up atmosphere with autonomy given to engineers
- In office and flexible hours

## About Quartermaster

## Company Overview
- **One-liner**: Quartermaster builds a real-time, distributed maritime awareness network by equipping vessels with AI-powered sensor packages (SmartMast) and an analytics platform.
- **Entity Type**: Private (Series A)
- **Headquarters**: Arlington, Virginia, United States
- **Founded**: 2023
- **Founders**: Neil Sobin (CEO)

## Core Business
- **Primary industry**: Maritime intelligence, defense technology, AI/robotics, ocean sensing
- **Target customers**: Governments (navies, coast guards), commercial shipping operators, insurers, and maritime researchers (B2G, B2B)
- **Mission**: “Connect every vessel on the water to create a comprehensive, real-time picture of our oceans, unlocking critical data insights that underpin a prosperous global maritime ecosystem.” [quartermaster.us](https://www.quartermaster.us/about)

## Products & Services
- **SmartMast**: A weather-hardened hardware package (cameras, radios, sensors) mounted on a ship’s mast that continuously collects and relays maritime data. Combined with an AI analytics platform, it provides real-time vessel identification, anomaly detection, and environmental monitoring. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **Quartermaster Analytics Platform**: Cloud-based software that ingests SmartMast data and applies computer vision and machine learning to generate actionable intelligence for fleet operators, insurers, and government agencies.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: $43 million in Series A funding (announced May 20, 2026) [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **Notable Investors/Partners**: Co-led by First Round Capital and Quiet Capital, with participation from TMV, Steel Atlas, BoxGroup, Operator Partners, Shorewind Capital, and David (surname not specified). Key hires from Anduril (Steve Ribaudo as CGO) and Scale AI (Matt Beck as COO). [quartermaster.us](https://www.quartermaster.us/about) | [linkedin.com](https://www.linkedin.com/company/quartermasterai)
- **Growth Signals**:
  - Headcount grew 625% year-over-year to 40 employees (as of mid-2026). [linkedin.com](https://www.linkedin.com/company/quartermasterai)
  - Over 600 ships equipped with SmartMast, covering 10 million square miles of ocean. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
  - Assisted in “over 20 rescues of mariners at sea.” [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
  - Operates in 7 countries (Panama, Colombia, South Korea, UAE, Brazil, Taiwan, United States). [linkedin.com](https://www.linkedin.com/company/quartermasterai)

## Competitive Advantages
- **Proprietary hardware edge**: SmartMast is far more advanced than the standard AIS (Automatic Identification System), which is opt-in and easily spoofed. Quartermaster’s sensors provide persistent, verified, real-time data that is less susceptible to fraud. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **Pro-mariner incentive model**: Rather than selling sensors to fleet operators (a tough sell in a low-margin industry), Quartermaster creates value for mariners (e.g., rescue support, safety data) to encourage voluntary adoption, locking in network effects. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **First-mover in distributed ocean sensing**: No other company has deployed a real-time, AI-powered sensor constellation at this scale, giving Quartermaster a data moat and early relationships with governments and commercial fleets.

## Strategic Focus
- **Engineering hiring**: A large portion of the $43M Series A is earmarked for hiring engineers (RF, software, AI, systems) to accelerate product development. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **Fleet expansion**: Continue equipping more vessels with SmartMast, especially in key maritime corridors, to densify the network.
- **New applications**: Developing uses for government intelligence, marine autonomy training data, environmental monitoring, and insurance risk assessment.
- **Global presence**: Scaling operations in Latin America, Asia, and the Middle East (already in 7 countries). [linkedin.com](https://www.linkedin.com/company/quartermasterai)

## Why Work Here
- **High-impact mission**: Directly contribute to ocean safety, security, and sustainability – work that has tangible real-world results (e.g., rescues at sea).
- **Fast-growing startup**: 625% YoY headcount growth; employees have significant ownership and influence over product direction.
- **Engineering culture**: “A single engineer can make a significant impact in relatively short periods of time” because the ocean space is largely untapped. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
- **Remote-friendly**: Some roles (e.g., “Opportunity Hire”) are listed as remote, though the HQ in Arlington, VA likely expects hybrid for core engineering teams. [quartermaster.us](https://www.quartermaster.us/jobs/opportunity-hire)
- **Diverse, inclusive environment**: Equal opportunity employer that encourages individuals of all backgrounds to apply. [quartermaster.us](https://www.quartermaster.us/jobs/opportunity-hire)
- **Notable perks**: Not explicitly listed, but the company emphasizes pro-mariner values and a collaborative, mission-driven culture.

## Sources
1. [quartermaster.us/about](https://www.quartermaster.us/about)
2. [techcrunch.com](https://techcrunch.com/2026/05/20/this-startup-raised-43m-to-build-a-hive-mind-for-ships/)
3. [linkedin.com/company/quartermasterai](https://www.linkedin.com/company/quartermasterai)
4. [quartermaster.us/jobs/opportunity-hire](https://www.quartermaster.us/jobs/opportunity-hire)
5. [jobs.ashbyhq.com/quartermaster](https://jobs.ashbyhq.com/quartermaster)

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