Zum
Public Transport
31open roles
$105kmedian advertised pay
Scaling fasthiring pace, 79 of 100
51 daysmedian time a role stays open
Overview
Zum is a student transportation company headquartered in Redwood City, California, that combines school bus and charter operations with its Connected Mobility Experience platform of apps, dashboards and routing software for districts, parents, drivers and yard teams. Founded in 2015, it serves school districts across the US, is rolling out electric school buses including a large fleet in San Francisco, and is backed by investors such as Sequoia Capital, GIC, TPG and SoftBank. It hires software, iOS and platform engineers and product managers at headquarters, alongside local diesel technicians, dispatchers, safety and operations supervisors and sales staff.
Key facts
As of Nov 13, 2026, Alion lists 31 open roles at Zum. Zum is headquartered in Redwood City, United States. It was founded in 2015. The median pay stated in its open roles is $94k, across 28 postings that state pay.
- Open roles
- 31Job postings Alion tracks, as of Nov 13, 2026
- Headquarters
- Redwood City, United StatesAlion company profile, updated Nov 13, 2026
- Founded
- 2015Alion company profile, updated Nov 13, 2026
- Employees
- 200+Alion company profile, an estimated range
- Median advertised pay
- $94kPay stated in 28 open postings
- Technologies in its job postings
- 32Named in its job postings
How Zum hires
Truth index
B 79/100
Median time to fill
51 days
Ghost roles
0%
Stale roles
83%
Reposted roles
0%
Zum scores B on the Alion truth index (A is best, E worst), measured over 6 open roles re-checked against its own hiring board: 0% look like ghost listings, 83% have gone stale and 0% are the same role posted again. Its roles close in a median of 51 days. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
Jobs
≈ $112k – $221k per year (Estimated) · Hybrid · Full-Time · 8+ years exp · Bachelor's Degree · Redwood City
SQL
Looker
Apply
$206k – $260k per year · In office · Full-Time · PhD · United States
Apply
≈ $113k – $222k per year (Estimated) · Remote (United States) · Full-Time · 5+ years exp · United States
Apply
$175k – $195k per year · Hybrid · Full-Time · 5+ years exp · Redwood City
Apply
$240k – $280k per year · Equity · Hybrid · Full-Time · 8+ years exp · Bachelor's Degree · Redwood City
JavaScript
TypeScript
Node JS
PostgreSQL
Redis
Apache Kafka
OpenSearch
DevOps
gRPC
Kubernetes
Apply
$200k – $240k per year · Equity · Hybrid · Full-Time · 5+ years exp · Redwood City
Swift
SwiftUI
Apply
$240k – $280k per year · Equity · Hybrid · Full-Time · Redwood City
JavaScript
TypeScript
RxJS
Angular
React.js
Mobile
React Native
State Management
Design
Figma
Apply
Apply
$190k – $260k per year · Equity · Hybrid · Full-Time · 5+ years exp · Bachelor's Degree · Redwood City
Python
JavaScript
Java
TypeScript
Node JS
PostgreSQL
Apache Kafka
DevOps
gRPC
GCP
Datadog
AWS
Kubernetes
Apply
$240k – $280k per year · Equity · Hybrid · Full-Time · 8+ years exp · Bachelor's Degree · Redwood City
Python
JavaScript
Java
TypeScript
Node JS
GCP
AWS
Apply
Salary insights
Compensation ranges based on this company's open jobs
Median
$105k
Typical range
$64k – $280k
Open positions
27
24
Jobs
Junior
16.7%
Middle
20.8%
Senior
41.7%
Staff
16.7%
Architect
4.2%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Junior | 4 | $81k | $70k – $94k |
| Middle | 5 | $82k | $64k – $105k |
| Senior | 10 | $182k | $80k – $260k |
| Staff | 4 | $280k | $147k – $280k |
| Architect | 1 | $260k | $260k |
Highest paying role
Staff Product Engineer, Backend
$280k
Normalized to USD per year
All salaries at Zum
By role, level and city, against the market · 27 jobs with pay
Growth
Hiring Momentum
79/100
Scaling fast
Open positions
31
9 opened / 7 closed in 30 days
Median time-to-fill
48 days
faster than 28% of the market
ATS activity
Every ~6 hours
Today
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Field & Service
45% ▼
Industrial Engineering
13% ▼
Management
10% ▲
Finance
5%
Operations
5% ▲
Backend
3% ▼
Actively hiring for Field & Service (+5 in 30 days)
Activity Timeline
Added Looker to stack
Oct 2026
Added SQL to stack
Oct 2026
New location: Los Angeles
Oct 2026
New location: San Francisco
Oct 2026
+5 jobs in a week
Oct 2026
New location: United States
Oct 2026
Added Agile to stack
Oct 2026
Added Perplexity to stack
Oct 2026
Added Claude to stack
Oct 2026
Added ChatGPT to stack
Oct 2026
Added Microsoft Excel to stack
Oct 2026
Added Google Sheets to stack
Oct 2026
Tech stack
Technologies named in job postings at Zum over the last 12 months, by layer, with the share of postings for each.
Technologies in use
32
Postings analysed
15
Stack modernity
83/100AI adopter
Languages
SQL20%
TypeScript13%
JavaScript13%
Node JS7%
Frameworks & libraries
Angular7%
React Native7%
RxJS7%
SwiftUI7%
Databases
OpenSearch7%
PostgreSQL7%
Redis7%
Cloud & platforms
Apache Kafka7%
Figma7%
Kubernetes7%
Looker7%
AI & ML
ChatGPT7%
Claude7%
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Full Zum tech stack
32 technologies · by team · pay by technology · changes · similar stacks
Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
Shared investors
News
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Offices
Where the company hires and what each office is for
Cities
9
Hiring now
9
Countries
1
Busiest office
Redwood City
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
Redwood City
United States
HQ
12 open roles 11 posted in 90 days 42% engineering 50-200 est. staff $226k Avg Salary
hires for Backend, Management, Operations
Seattle
United States
Plant / site
4 open roles 5 posted in 90 days 25% remote 10-50 est. staff $105k Avg Salary
hires for Field & Service, Management
Oakland
United States
2 open roles 2 posted in 90 days 10-50 est. staff $79k Avg Salary
hires for Field & Service
Saint Louis
United States
1 open roles 3 posted in 90 days 10-50 est. staff $64k Avg Salary
hires for Field & Service
Omaha
United States
1 open roles 1 posted in 90 days 10-50 est. staff $64k Avg Salary
hires for Field & Service
Roanoke
United States
1 open roles 1 posted in 90 days 10-50 est. staff $80k Avg Salary
hires for Industrial Engineering
Rockford
United States
1 open roles 2 posted in 90 days 10-50 est. staff $80k Avg Salary
hires for Industrial Engineering
Los Angeles
United States
1 open roles 1 posted in 90 days 1-10 est. staff $94k Avg Salary
hires for Industrial Engineering
San Francisco
United States
1 open roles 1 posted in 90 days 1-10 est. staff $86k Avg Salary
hires for Field & Service
Earlier presence
Philadelphia, United States
Yonkers, United States
Shawnee, United States
Kansas City, United States
Johnston, United States
How to cite this page
Alion, "Zum: key facts", as of Nov 13, 2026. https://alion.io/company/ridezum
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page. CC BY-SA 4.0