Fireworks AI
Small (~100)
Helsing
Mid (~660)
Best For
Fireworks AI
Best for: Engineers who want to work with ex-Meta AI infrastructure engineers on LLM inference
Helsing
Best for: AI/ML engineers motivated by national security and defense who want to apply frontier AI to high-stakes real-world problems in a mission-driven team
Ratings
Fireworks AIHelsing
4.2
4.0
Overall
3.3
3.6
Work-Life Balance
4.3
4.1
Culture & Values
4.2
4.0
Comp & Benefits
4.2
3.8
Senior Mgmt
4.0
3.8
Career Opps
👍 80% Recommend
👤 84% CEO Approval (Gundbert Scherf)
Culture Values
Fireworks AI only
🧩 Wears Many Hats🎧 Deep Work / Low Meetings
Helsing only
🎯 Direct Product Impact💎 Strong Comp & Equity
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate🌱 Learning & Growth
Pros & Cons
Fireworks AI
- World-class team of ex-Meta AI infrastructure engineers — technically very strong peers
- Working on LLM inference optimization which is one of the hottest areas in AI infrastructure
- Early-stage startup intensity with long hours expected and high performance bar
- Small team and rapidly evolving product means less structure, process, and career laddering
Helsing
- Highest talent density of any tech company — world-class AI and engineering leadership
- Extremely important mission with rewarding impact and competitive salary
- Ridiculous expectations of work hours — high salaries do not mean constant overtime
- Some management not experienced enough to lead; lacking in performance feedback
Bottom Line
Fireworks AI
Choose Fireworks AI if you want to work with ex-Meta AI infrastructure engineers on cutting-edge LLM inference — but expect early-stage startup intensity and limited structure.
Helsing
Strong engineering culture with a clear mission — but that mission (AI for defense) is not for everyone. Research the ethics carefully before applying; those aligned will find unusually meaningful work.
Open Roles
Fireworks AI — 29 jobs
💻 Engineering
7
💼 Sales / GTM
5
⚙️ Operations
3
🎨 Design
1
👤 HR / People
1
📣 Marketing
1
🧠 ML / AI
1
📋 Product
1
Helsing — 103 jobs
💻 Engineering
51
🧠 ML / AI
8
⚙️ Operations
4
📋 Product
4
💰 Finance
3
🎨 Design
2
📣 Marketing
2
👤 HR / People
1
💼 Sales / GTM
1
🎧 Support
1
Summary
Fireworks AI scores 4.2/5.0 on Glassdoor with a 3.3 work-life balance rating. Helsing scores 4.0/5.0 overall with a 3.6 WLB. That’s a 0.2-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Ship Fast & Iterate, Learning & Growth. Fireworks AI also emphasizes Wears Many Hats, Deep Work / Low Meetings. Helsing also emphasizes Direct Product Impact, Strong Comp & Equity.
On the hiring front, Fireworks AI has 29 open roles and Helsing has 103 open roles.