---
title: 'Senior Software Engineer at Theseus Technology Corp'
canonical: 'https://feeny.ai/job/senior-software-engineer-theseus-technology-corp-san-francisco-tjctt5q1nwjt'
type: 'job'
last_seen: '2026-09-11'
---

# Senior Software Engineer at Theseus Technology Corp

- **Company:** Theseus Technology Corp
- **Location:** San Francisco, CA
- **Compensation:** $160k–$220k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-03-28
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.gem.com/theseus-us/am9icG9zdDrw_pt54fYFbrO_mypUSM51

## Job description

## Who we are

Theseus builds visual positioning systems for autonomous aircraft operating in GPS-denied and contested environments. Our software enables reliable navigation and mission execution when conventional navigation systems fail, and our products are already being deployed in real-world operational settings.

We are building the software stack that turns advanced autonomy, mapping, and mission capabilities into practical systems operators can rely on in the field. That includes the software used to configure systems, plan missions, move maps and data through operational workflows, and understand mission performance before, during, and after deployment.

## The role

We are seeking a Senior Software Engineer to build the software layer operators rely on before, during, and after mission execution.

This is a product-oriented engineering role for someone who has experience building software for operators or other demanding real-world users and can work across the stack. You will contribute to the APIs that live on the edge and interface with deployed systems, the backend services that support map generation and mission workflows, and the frontend applications operators use, including Vozilla and related tools. You should be comfortable building reliable, understandable, user-facing systems in environments where performance, clarity, and operational usefulness matter.

You will:

- Build operator-facing software across mission planning, data workflows, and mission analysis
- Develop frontend applications, backend services, and internal APIs across edge and cloud systems
- Work across React, TypeScript, Python, and database-backed systems to support deployed products and map-generation workflows
- Partner with autonomy, field, and integration teams to translate operational needs into reliable product features
- Move quickly from ambiguous user needs to shipped software, improving reliability, performance, and usability through feedback from real deployments

You should have the following

- 3+ years of experience building software products for operators or other users with demanding workflows
- Experience owning and shipping production systems across frontend, backend, and API layers
- Strong judgment about how to make software clear, dependable, and usable in operational settings
- Ability to translate ambiguous user needs into pragmatic product and engineering decisions
- Strong proficiency in TypeScript, React, and Python
- Experience designing and working with databases and common database frameworks
- Experience building and maintaining backend services, internal APIs, and data-intensive applications
- Strong communication skills and the ability to work effectively across highly collaborative technical teams

## Nice to have

- Experience building software for robotics, aerospace, defense, industrial, or other operationally demanding environments
- Experience with mapping, geospatial systems, mission planning tools, or telemetry-heavy applications
- Experience building software that spans cloud services and edge-deployed systems

## About Theseus Technology Corp

## Company Overview
- **One-liner**: Theseus builds software-first visual positioning systems for drones operating in GPS-denied environments, enabling reliable navigation when GPS is jammed, spoofed, or unavailable.
- **Entity Type**: Private (Pre-Seed round in 2024, Seed round in 2025)
- **Headquarters**: Stanford, CA / San Francisco, United States
- **Founded**: March 2024
- **Founders**: Ian Laffey (CEO) and Sacha Lévy (CTO)

## Core Business
- **Primary industry**: Defense and Space Manufacturing
- **Target customers**: B2B – primarily U.S. Department of Defense, Special Operations Command (SOCOM), and drone manufacturers
- **Mission**: To keep humans far from the battlefield and ensure reliable position when GPS is jammed, spoofed, or gone.

## Products & Services
- **Micro Visual Positioning System (VPS) / Visual Navigation System (VNS)**: A software-only, passive system that uses onboard cameras, inertial sensors, and pre-loaded satellite imagery to compute position fixes. It sends a fake GPS signal to any drone, enabling operation in contested environments. Integrations typically take less than 30 minutes. The system is low-cost, lightweight, and has no RF signature.

## Market Standing
- **Valuation**: Not publicly disclosed
- **Total Funding**: $4,925,000 (Pre-Seed $500K led by Y Combinator, Seed $4.3M led by First Round Capital)
- **Notable Investors/Partners**: Y Combinator (first defense company accepted into the program), First Round Capital, U.S. Special Operations Command (USSOCOM)
- **Growth Signals**: 116.7% headcount growth (now 8 employees); first unit shipped to a DoD customer in August 2024; multiple customers; six-figure letters of intent from large drone manufacturers; $8 million in funding requested by the DoD for FY25 for the VNS system.

## Competitive Advantages
- First-ever defense company accepted into Y Combinator, giving access to a strong network and rapid iteration methodology.
- Passive, low-cost, lightweight alternative to bulky GPS replacements – no RF signature, cannot be jammed.
- Proven in real-world contested environments (tested by USSOCOM, deployed in Ukraine-like scenarios).
- Software-first approach allows rapid integration with existing drone platforms (<30 min).

## Strategic Focus
- Scale up production to meet the demand for millions of drones per year, especially for Western allies.
- Continue refining the Micro VPS accuracy and reliability while reducing cost.
- Expand customer base across DoD branches and allied nations, and target large drone manufacturers for integration.

## Why Work Here
- **Culture**: High ownership, fast-moving, small team (7-8 people) where every engineer’s work is deployed immediately. “Test constantly, move fast, build for real users in contested environments.”
- **Work Environment**: On-site presence in San Francisco/Stanford area; close collaboration with military operators and hardware teams.
- **Notable Perks**: Work on software that directly impacts national security; be part of a YC-backed startup that is pushing the boundaries of visual autonomy; opportunity to shape the product from the ground up.

## Sources
1. [Theseus About Page](https://www.theseus.us/about)
2. [Theseus Careers Page](https://www.theseus.us/careers)
3. [HigherGov – Theseus Technology Corporation](https://www.highergov.com/awardee/theseus-technology-corporation-782067117/)
4. [LinkedIn – Theseus Company Profile](https://linkedin.com/company/theseustech)
5. [Y Combinator – Theseus Profile](https://www.ycombinator.com/companies/theseus)

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