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10 Years In Big Tech: The Ugly Truth About Fintech
Fintech is sold like prestige: modern office, high salary, clever people, important systems. All true.
Also true: your bug can block salary payment for real person. Your alert can wake you at night. Your “small change” can become regulatory incident. Welcome to adult backend engineering.
Money Adds Weight
In ordinary product, broken button is bad. In fintech, broken transfer is different category. People trust system with rent, salary, savings, business cashflow.
This changes engineering culture. Reviews are stricter. Deployments are slower. Audit trail matters. Rollback plan is not optional. Logs must explain what happened without leaking secrets.
On-Call Is Part Of Salary
High salary is not gift. It buys availability and responsibility.
You will have quiet weeks. Then one Saturday, payment processor starts returning weird errors, queue grows, dashboard turns red, and everyone wants ETA.
Good teams rotate fairly, document runbooks, and improve system after incidents. Bad teams call it heroism and burn people until they leave.
Big Tech Is Not Magic
Tier-1 company still has legacy code, strange politics, rushed launches, and services nobody fully understands.
Difference is scale. A tiny inefficiency becomes infrastructure bill. A vague requirement becomes cross-team drama. A missing metric becomes blind incident.
Do not romanticize logo. Logo does not debug production.
Pressure Creates Skill
You learn to think in failure modes. What if database is slow? What if partner returns duplicate callback? What if request times out but transaction later succeeds? What if idempotency key collides?
This is valuable. Fintech makes you allergic to hand-waving.
Pressure Also Creates Damage
Constant urgency can make engineers cynical. Every product idea sounds dangerous. Every deadline sounds fake. Every manager sounds like risk source.
You must learn to push back professionally before resentment becomes personality.
What Good Looks Like
Good fintech team has tests around money logic, strong observability, boring deployments, clear ownership, incident reviews without theater, and managers who understand risk.
Bad team has heroic releases, manual database fixes, secret Slack knowledge, and “temporary” bypasses from 2021.
Career Advice
Join fintech if you want serious backend experience and can handle responsibility. Do not join if you want constant greenfield fun and zero stress.
The money is good because blast radius is real. Respect that, or it will educate you.