Adyen
Large (~4,770)
Mercor
Small (~200)
Best For
Adyen
Best for: Payments and backend engineers who value a no-nonsense engineering-first culture with above-average WLB and the challenge of processing global financial transactions at massive scale
Mercor
Best for: Engineers who want to build AI hiring infrastructure at a $10B rocketship with extreme ownership and MIT-founder energy
Ratings
AdyenMercor
3.8
3.9
Overall
4.1
3.9
Work-Life Balance
3.9
3.6
Culture & Values
3.8
4.0
Comp & Benefits
3.6
3.5
Senior Mgmt
3.6
3.7
Career Opps
👍 76% Recommend
👤 80% CEO Approval (Ingo Uytdehaage)
👍 74% Recommend
👤 82% CEO Approval (Brendan Foody)
Culture Values
Adyen only
⚖️ Work-Life Balance🎯 Direct Product Impact🌱 Learning & Growth
Mercor only
🤝 Flat Hierarchy💎 Strong Comp & Equity
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate
Pros & Cons
Adyen
- Smart, humble colleagues with high standards and a market-leading payments product
- Good work-life balance with trust-based culture, free lunch, and international team trips
- Below-market compensation (~20% less than peers) with poor stock options
- Middle management quality issues as company scaled — inexperienced managers and internal politics
Mercor
- Massive impact at an AI company growing at breakneck speed
- Top-tier compensation with strong equity at $10B valuation
- Intense 9/9/6 work schedule — long hours are the norm
- Work-life balance is a real sacrifice at this stage
Bottom Line
Adyen
Adyen's engineering culture is well-regarded in fintech — principled, WLB-conscious (4.1/5), and technically rigorous — but expect a methodical Amsterdam-centric culture rather than a high-growth startup vibe.
Mercor
Choose Mercor if you want outsized impact on AI-era hiring at a tiny, fast-moving team — but the 9/9/6 schedule is real, and work-life balance is genuinely sacrificed for speed.
Open Roles
Adyen — 279 jobs
💻 Engineering
80
💼 Sales / GTM
65
⚖️ Legal
19
💰 Finance
14
⚙️ Operations
12
📋 Product
12
👤 HR / People
11
📊 Data
10
🎨 Design
5
📣 Marketing
2
🧠 ML / AI
2
Mercor — 49 jobs
💻 Engineering
20
🧠 ML / AI
6
💼 Sales / GTM
5
👤 HR / People
3
📊 Data
2
📣 Marketing
2
📋 Product
2
🎨 Design
1
⚙️ Operations
1
Summary
Adyen scores 3.8/5.0 on Glassdoor with a 4.1 work-life balance rating. Mercor scores 3.9/5.0 overall with a 3.9 WLB. That’s a 0.1-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Ship Fast & Iterate. Adyen also emphasizes Work-Life Balance, Direct Product Impact, Learning & Growth. Mercor also emphasizes Flat Hierarchy, Strong Comp & Equity.
On the hiring front, Adyen has 279 open roles and Mercor has 49 open roles.