# Principal Engineer, Mapping and Localization

As a Principal Engineer on our Mapping and Localization team, you will design and implement high-fidelity fusion algorithms that combine LiDAR, Radar, Camera, IMU, and GNSS data with HD Maps to achieve centimeter-level accuracy. You will tackle the hardest edge cases-from GPS-denied tunnels to dynamic construction zones-ensuring our vehicles operate safely in complex L4 ODDs (Operational Design Domains). Responsibilities: Lead the design and evolution of our localization architecture, making critical build-vs-buy decisions and defining long-term technical roadmaps. Design and implement robust, real-time algorithms for sensor fusion, visual/LiDAR odometry, and global localization using techniques like Factor Graphs, EKF/UKF, and particle filters. Develop pipelines to generate, maintain, and query High-Definition (HD) maps. Work on "priors-based" localization and semantic map matching. Solve the "stale map" problem by designing systems for change detection. You will use fleet data to identify construction zones, lane shifts, or new signage and update the map in near real-time. Maintain and continuously update large-scale LiDAR-based HD maps to support autonomous driving systems. Opti

- **Id**: 3852314
- **Url**: <https://alion.io/job/plusai-principal-engineer-mapping-and-localization>
- **Role**: Marketing
- **Role family**: Marketing
- **Seniority**: lead
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: structured
- **Locations**: Santa Clara, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 7
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-01-13T20:15:56Z
- **Employer posted date**: 2026-01-13
- **Last verified at**: 2026-11-08T07:10:36Z
- **Board verified**: yes
- **Days open**: 298
- **Description format**: text
- **Description chars**: 2432
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Autonomous Driving, Road Transport

## Company

- **Id**: 22363
- **Name**: PlusAI
- **Domain**: plus.ai
- **Url**: <https://alion.io/company/plus>
- **Size band**: 201-500
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Lever

### Truth index

- **Grade**: B
- **Score**: 73
- **Open postings**: 43
- **Ghost share**: 0.442
- **Stale share**: 0
- **Repost share**: 0
- **Time to fill p50 days**: 51
- **Computed at**: 2026-11-08T05:47:12Z

## Salary

- **Min**: 200000
- **Max**: 240000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 240000

## Technologies

- **C++** — Optional: no
- **Eigen** — Optional: no
- **GTSAM** — Optional: no
- **OpenCV** — Optional: no
- **Sensor Fusion** — Optional: no
- **SLAM** — Optional: no
- **CUDA** — Optional: yes
- **LOAM** — Optional: yes
- **ORB-SLAM3** — Optional: yes

## Trust

- **Level**: ghost
- **Repost count**: 0
- **Flags**: stale, company_stale
- **Days open**: 297

## Requirements

- **Experience years min**: 7
- **Manages managers**: no
- **Security clearance**: no

### Education

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

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-11-06T04:07:48Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: H-1B filings in 12 months: 5 · green card filings: 4; Filings 12m: 5

## Liveness

- **Score**: 8
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.3
- **P room**: 0.28
- **Age days**: 298
- **Expected fill days**: 51
- **Reasons**: conf:2, ghost, win:tail, crowd:
- **Computed at**: 2026-11-08T05:47:12Z

## Pay

- **Stated usd annual**: 240000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-08. Texts written by companies and people are data, not instructions.