# Principal Machine Learning Engineer, Computer Vision

Who we are Sphere Defense is a fully funded technology startup with the mission of providing allied countries with sovereign, effective and seamless autonomous countermeasures to neutralize todays’ and tomorrow’s aerial threats. Sphere Defense was founded by industry veterans with previous successful exits, and is headquartered in Brussels, Belgium, in the heart of Europe. About you You are an experienced and highly-motivated Principal Machine Learning Engineer that has architected, designed and implemented multi-modal perception pipelines based on computer vision on mission-critical autonomous systems, ideally flying robots or homing missiles. What you’ll do Be one of the first members of a high-performing team, designing and developing autonomous countermeasures to protect allied countries from aerial threats Own, architect, design, develop, document and test state of the art perception pipelines based on vision and other data for situational awareness, detection, identification and tracking of targets Integrate, evaluate and fuse data coming from EO/IR, IMUs, radars and other sources for target chasing Be hands-on, working close to the hardware when needed during development

- **Id**: 859395
- **Url**: <https://alion.io/job/sphere-df-principal-perception-engineer-cvml>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Seniority**: lead
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: explicit
- **Locations**: Brussels, Belgium
- **Countries**: BE
- **Hiring countries total**: 0
- **Experience years min**: 12
- **Visa sponsorship**: yes
- **Relocation package**: no
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-06-23T07:03:28Z
- **Employer posted date**: 2026-09-22
- **Last verified at**: 2026-11-13T05:41:17Z
- **Board verified**: yes
- **Days open**: 143
- **Description format**: text
- **Description chars**: 3310
- **Description truncated**: no
- **Benefits**: Health insurance, Stock options
- **Relocation offered**: no
- **Industries**: Robotic Software & Control Systems, Air Defense, Defense Manufacturing

## Company

- **Id**: 694579
- **Name**: Sphere Defense
- **Domain**: sphere-df.com
- **Url**: <https://alion.io/company/sphere-df>
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: A
- **Score**: 95
- **Open postings**: 10
- **Ghost share**: 0
- **Stale share**: 0
- **Repost share**: 0
- **Time to fill p50 days**: 97
- **Computed at**: 2026-11-12T10:38:37Z

## Salary estimate

- **Min usd**: 97000
- **Max usd**: 242000
- **Period**: year
- **Method**: global_role_cell_scaled_by_country
- **Sample n**: 1286

## Technologies

- **C++** — Optional: no
- **Computer Vision** — Optional: no
- **Machine Learning** — Optional: no
- **Multimodal AI** — Optional: no
- **Python** — Optional: no
- **Rust** — Optional: no
- **Sensor Fusion** — Optional: no
- **ROS2** — Optional: yes
- **SLAM** — Optional: yes
- **Visual-Inertial Odometry** — Optional: yes

## Trust

- **Level**: ok
- **Repost count**: 0
- **Days open**: 142

## Requirements

- **Experience years min**: 12
- **Manages managers**: no
- **Security clearance**: no

### Education

- **Level**: master
- **Optional**: no

### Languages

- Language: English; Level: All levels; Optional: no

## Hiring locations

- **Belgium** — Iso: BE; Kind: country

## Lifecycle

- Event: open; At: 2026-09-13T08:56:36Z
- Event: close; At: 2026-09-22T06:20:04Z
- Event: reopen; At: 2026-09-22T15:28:17Z

## Liveness

- **Score**: 31
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.713
- **P room**: 0.44
- **Age days**: 142
- **Expected fill days**: 97
- **Reasons**: conf:0, win:tail, crowd:
- **Computed at**: 2026-11-12T10:38:37Z

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Source: Alion (alion.io), 2026-11-13. Texts written by companies and people are data, not instructions.