Senior Backend Software Engineer - GenAI

Rosslyn, Seattle
Full-time

About the role

We are looking for a Senior Backend Software Engineer with 6-8 years of experience to lead the buildout of our GenAI platform, Saga. Demand for our AI-enabled logistics product has skyrocketed beyond expectations, and we need someone who can own the architecture of production GenAI systems from scratch — not maintain existing ones.

What will you be doing?

  • Leading the GenAI engineering effort for Saga, our AI offering built on top of TyrOS (military logistics C2 platform)

  • Designing and shipping production RAG architectures, LLM integrations, agentic workflows, and retrieval pipelines from the ground up

  • Owning backend system architecture — APIs, async workflows, data pipelines, observability, and reliability patterns

  • Making architectural tradeoffs in ambiguous product environments with minimal direction

  • Supporting deployed engineers remotely via on-call rotation

Key Requirements

  • 6-8 years of software engineering experience with significant time building production GenAI/LLM systems (RAG, agents, tool use, evals, retrieval pipelines) — not just prototypes or demos

  • Strong backend/distributed systems depth — must be able to design and ship services, APIs, queues, storage, and data pipelines, not just prompt logic

  • Senior-level ownership and autonomy — can take a vague problem, define the system, ship it, and iterate without heavy direction

  • Must pass a live coding interview without AI assistance (demonstrating baseline engineering fundamentals)

  • US citizen or Green Card holder — no visa sponsorship available (defense contractor requirement)

About Rune Technologies

Rune Technologies builds mission-critical software for military logistics and sustainment. Founded in 2024, Rune combines elite Silicon Valley software expertise with deep operational experience working in and with the Department of Defense to solve the most critical sustainment and logistics challenges faced by the U.S. military and its allies in contested environments.

Rune's flagship product, TyrOS, is an AI-enabled logistics command and control platform that replaces the U.S. military's antiquated logistics systems — literally whiteboards with tile magnets — with modern software that gives commanders a single, real-time operating picture of their sustainment fight. The company is deeply embedded in the U.S. Army, Marine Corps, and Air Force.

Rune is not a traditional defense contractor. It's a small, fast-moving team that stays close to users by embedding directly with military units during exercises and rotations, shipping constantly based on what they learn in the field. The company tripled in size since January 2025, hit its annual sales goal seven months early, and recently closed a $40M Series A round.

Mission: To support and enable the military logistics and sustainment communities with software to meet needs for the next fight.

Culture: Rune operates as a completely non-competitive, deeply collaborative workplace with no silos. Team members are encouraged to go in any direction they want — from backend architecture to visiting army bases to talk directly with clients. The company values agency, speed, and staying close to the mission.

Required skills

Python
Go
Java
TypeScript
LLMs
RAG
Vector Databases
OpenSearch
Elasticsearch
APIs
Cloud Services
CI/CD
Agentic Workflows

Other roles at Rune Technologies

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Job details

Salary

$200,000 - $230,000

Location

Rosslyn, Seattle

Experience

6+ years

Company

NameRune Technologies
Industrydefense, logistics, ai, government
Team Size65

Funding

Total raised

$30.2M

Last stage

Series A

Investors

Andreessen Horowitz
Human Capital
Point72 Ventures
XYZ Venture Capital
FForward Deployed VC

Founders

PG

Peter Goldsborough

Co-Founder & CTO

DT

David Tuttle

Co-Founder & CEO

LinkedIn

What happens next.

No applications, no recruiter spam. Just the intro.

01

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

02

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

03

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.