Application Security Engineer
You stop vulnerabilities from being written, rather than finding them after they ship.
No degree needed Hard. It is two disciplines, and you cannot fake either.
Test only systems you own or have written permission to test, and follow a project's published disclosure policy. Unauthorised access is a criminal offence in most countries even when your intent is to help.
Can I actually do this?
Open without a degree, and one of the better-paid places a self-taught developer can end up. It is not an entry-level role: you need to read and write code well before the security layer means anything. The most common route is a few years of development followed by a deliberate turn toward security. Everything below is free.
Who it suits. People who like reading other people's code and asking what happens if this input is hostile.
Runway. Years, and you need to be able to read code fluently first.
Coming from development? That is the strongest starting point, and it is what most job ads are quietly asking for. Backend Developer Penetration Tester Security Analyst
Also advertised as
The route
Four stations, in order. Each one is a thing you finish before the next matters.
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Station one
Learn it free
Only the best few, deliberately. Every one of these is free to use — the pill on each card says exactly what is and isn't free.
OWASP Top 10 Proactive Controls
Free to learn · no certificate
The defensive counterpart to the famous Top 10 — what to build rather than what to fear. Free and open. This is the more useful of the two for this role.
Verified 2026-07-28
OWASP Cheat Sheet Series
Free to learn · no certificate
Concrete, per-topic guidance you will actually cite in code review. Free.
Verified 2026-07-28
PortSwigger Web Security Academy
Free to learn · no certificate
You cannot defend against what you have never exploited. Free labs, no certificate.
Verified 2026-07-27
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Station two
Attest strategically
Nothing named. Certifications exist in this space and some carry weight, but appsec hiring runs on whether you can find a real flaw in real code and explain the fix to the person who wrote it. A public code review or a responsibly-disclosed finding does more than any certificate, and costs nothing.
Nothing here is worth paying for
No credential needed
Nothing named. Certifications exist in this space and some carry weight, but appsec hiring runs on whether you can find a real flaw in real code and explain the fix to the person who wrote it. A public code review or a responsibly-disclosed finding does more than any certificate, and costs nothing.
Checked 2026-07-28
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Station three
Prove it
A certificate says you passed a test. These say you can do the job.
A security fix merged into real code
Find a flaw in an open-source project, disclose it responsibly, and submit the patch. Public, dated, and attributable.
A threat model for something you built
What an attacker wants, how they would get it, what you did about it. One page.
A review comment that changed a design
Show yourself persuading an engineer, not overruling them. Appsec fails when it is a gate rather than a colleague.
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Station four
Get hired
Search these exact titles
Who hires for this. Software companies with something worth stealing, fintech, health tech, and consultancies doing secure code review.
A responsibly-disclosed finding with a merged patch is public and checkable, which is rare evidence in security work. That is our reasoning about what is inspectable, not a hiring statistic we have verified.
On salaryWe don't publish salary estimates. Numbers copied between blogs drift from reality, and a wrong number costs you real negotiating power. When we have a verified public source, it goes here with its date.
Where this route continues
- Penetration Tester — if you prefer breaking to building
- Penetration Tester — sideways move
- Backend Developer — sideways move
- Security Analyst — sideways move
This page last verified 2026-07-28 · How we verify
OWASP Proactive Controls and the Cheat Sheet Series fetched and READ 2026-07-28. PortSwigger carried from 2026-07-27.