Senior Fullstack AI Engineer - Agents

Vannevar Labs; United States; Remote; USD 160,000 - 180,000; Full time

Job summary

Vannevar Labs is seeking a Senior Fullstack AI Engineer to design and prototype innovative AI-native solutions that impact critical missions. This role requires expertise in fullstack development and AI technologies. Join a team dedicated to supporting national security operations that matter, with opportunities to work across various disciplines and leverage state-of-the-art AI capabilities. Competitive salary and benefits offered, including flexibility to work remotely.

Benefits

Health, dental, and vision insurance

100% remote first culture

Unlimited PTO

Lifestyle stipends

Salary top-up during military reserve duty

Fully paid parental leave

Child and pet care reimbursement during travel

Qualifications

• A track record of shipping high impact, fullstack, and preferably data or AI-enabled applications.
• Deep and current knowledge of AI capabilities, LLM tooling, and emerging trends.
• Excitement to work cross-functionally with engineers, designers, and ML engineers.

Responsibilities

• Design & prototype agentic solutions; own the full lifecycle of building agents.
• Build chat and agent native applications while implementing new features.
• Collaborate across disciplines to build effective AI-native applications.

Skills

AI capabilities

Fullstack development

React

Typescript/JavaScript

Python

Relational databases

Caching technologies

Distributed search systems

Job description

Join to apply for the Senior Fullstack AI Engineer - Agents role at Vannevar Labs

Join to apply for the Senior Fullstack AI Engineer - Agents role at Vannevar Labs

Our mission is to be the technology backbone for strategic competition against peer adversaries. These missions – including intelligence, information operations, special activities, and perception management – are happening today and their success or failure will determine if we go to war tomorrow.

We've been on the front lines of these missions since 2019, and have grown to support a wide range of missions across all US service branches, multiple combatant commands, partner nations, and interagency stakeholders. We deploy both hardware and software products to support people on the front lines that span collection, planning / assessments, and effects.

We've grown from $3M in run-rate revenue in 2021 to $80M in run-rate revenue today. We've been profitable since 2022 and have raised $91M in venture capital funding through Series B. We're valued at $1.5B as of 2025.

About The Role

The Agentic AI team is building key AI-native applications as well as the platforms and libraries to embed Agentic AI across the company. We are looking for a Senior Fullstack Software Engineer to help build and deliver mission-critical capabilities into the hands of those who serve our nation.

We are working in a space that is a perfect fit for AI Agents - the process is plentiful but well specified, there is an abundance of multi-modal data, and accelerating speed to decision is the difference between winning and losing. You will work on cutting edge technical challenges that span AI, UX design, and software engineering, while also working on problems that matter.

What You’ll Do

• Design & prototype agentic solutions. Own the full lifecycle of building agents - prompt engineering, custom agent architectures, tool-calling, fine-tuning, guardrails, and evaluations.
• Build chat and agent native applications. Implement new features to grow our dedicated chat-first application and embed agentic assistant experiences into new applications.
• Implement re-usable components to enable other developers. Work with other engineers to build re-usable components for key patterns like contextual chat experiences, human-in-the-loop agents, and ambient agents that can be used across the Vannevar product suite.
• Embed with customers and mission owners. Dive deep into customer workflows to collect feedback, debug in the field, and iterate quickly.
• Collaborate across disciplines. Building effective AI-native applications crosses many disciplines. To build the right application you will work with AI Engineers to understand the capabilities an limitations of AI agents, designers to pick the right UX patterns for users, and product owners to solve real-world customer workflows.
  
  

Must Have

• A track record of shipping high impact, fullstack, and preferably data or AI-enabled applications
• Deep and current knowledge of AI capabilities, LLM tooling, and emerging trends.
• An excitement to work cross-functionally with other engineers, designers, and machine learning engineers
• Bias towards achieving outcomes, including willingness to step outside your immediate role to ensure mission success.
• Familiarity with relational databases (like Postgres), caching technologies (like Redis), object stores (like S3), and distributed search systems (like ElasticSearch)
• Experience with React, Typescript/JavaScript, and Python
• Active or previous TS / SCI Clearance is a plus but not needed
  
  

What We Offer

The salary range for this position is $160,000 - $180,000 + equity + 401K match. Within the range, individual pay is determined by experience, relevant education, and/or training.

We’re proud to offer competitive benefits that support our employees. Some key highlights of our benefits package include:

• Health, dental, and vision insurance
• 100% remote first culture. You can work from anywhere in the US and all full time employees have WeWork access
• Unlimited PTO including competitive vacation and holiday schedules
• Lifestyle stipends - Monthly mental health, wellness & fitness stipend, in-home office setup stipend and family planning assistance
• Salary top-up during military reserve duty
• Fully paid parental leave
• Child and pet care reimbursement during travel
  
  

Vannevar Labs is an equal opportunity employer, and qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status.

We encourage candidates from all backgrounds to apply, even if you don't feel like you're a perfect fit. If you're passionate about contributing to our mission, we'd love to hear from you!

IMPORTANT NOTICE

We are committed to protecting the privacy of all applicants. Official emails from the company will come from an @vannevarlabs.com domain. Under no circumstances will a legitimate representative from our company contact you to request passwords, financial information, or other sensitive personal data. Please be vigilant of potential scams.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Defense and Space Manufacturing

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