Application Security Engineer Resume
Skills & ATS Keywords

Aim for 30 to 44 named AppSec tools, languages reviewed, threat-modeling frameworks, supply-chain artifacts, OWASP standards, and certifications on the page. Group them into 7 to 9 row labels (SAST, DAST, SCA, API Security, Threat Modeling, Supply Chain, Secure SDLC, Languages Reviewed, Certs). Below 24 the file reads thin for an engineer who is supposed to own SAST and SCA for a product org; past 50 the rows look like a glossary the candidate read once. Every chip must point to something a product-security director can ask about: a Semgrep rule set you authored, a Snyk policy you tuned, a Burp scan you ran against a staging cluster, a STRIDE session you facilitated with a backend squad, an SBOM you started generating for a tier-1 service, an OWASP ASVS Level 2 control you signed off. The numbers a panel reads on top of the chips are squads supported, SAST and SCA findings triaged, false-positive rate, threat-modeling sessions per quarter, bug-bounty MTTR, and supply-chain attestation coverage.

Sit it under the Profile Summary and above Work Experience. AppSec hiring managers, product-security directors, and the parser stacks used by product-security pipelines (Workday, Greenhouse, Lever, iCIMS, Ashby) scan the upper third of page one before anything else, and a Semgrep, Snyk, Burp Suite, STRIDE, ASVS, SLSA, or OSCP token weighs more when it sits inside a labeled Skills row at the top of the file than when it shows up two pages later inside a paragraph. Drop the block onto page two and the AppSec tool acronym cluster collapses into prose, the parser registers a fraction of it, and the SAST and SCA and threat-modeling bullets stop echoing the keywords the screen is actually weighting. Hold the block to 7 to 9 grouped rows so a product-security director reads your SAST, DAST, SCA, API-security, threat-modeling, supply-chain, and certification coverage in one downward pass before the first product-team bullet.

Open the AppSec req in one tab and the draft in another, then walk the posting top to bottom and highlight every named AppSec tool (Semgrep, Snyk, Checkmarx, Burp Suite, Veracode, ZAP, GitHub Advanced Security), every framework (OWASP Top 10, ASVS, SAMM, STRIDE, PASTA, SLSA), every supply-chain artifact (SBOM, Sigstore, cosign, in-toto), every language family the team reviews (Java, Python, Go, TypeScript, .NET), and every certification block (OSCP, OSWE, OSWA, CSSLP, CASE, GWAPT). Anything that turns up gets a slot on the Skills row only when you can defend it with a real product-security bullet: the squad you ran the Semgrep rollout against, the bug-bounty queue you triaged, the threat-model session you facilitated. Mirror the exact capitalisation and acronym form the posting uses (if the req writes “Snyk Code” rather than “SAST”, carry “Snyk Code” on the row), and stash a copy of the highlighted JD as a paraphrase reference for the cover letter and the recruiter intro call.

Application Security Engineer is the application-specialist subset of the security family: the entire scope is product code, the SDLC around it, and the developer teams shipping it. The week reads like SAST and SCA program ownership in Semgrep and Snyk across product squads, threat-modeling sessions facilitated against new designs in STRIDE or PASTA, API security reviews on REST and GraphQL and gRPC, supply-chain attestations through Sigstore and SLSA and SBOM tooling, OWASP ASVS control mapping, and bug-bounty triage on HackerOne or Bugcrowd. Security Engineer is the generalist chair that carries AppSec scanners alongside cloud posture, on-prem IAM, detection engineering, and incident response across the whole estate. DevSecOps Engineer sits on the pipeline side: the file is CI/CD-shaped security automation, IaC scanning, container build hardening, secrets in pipelines, and platform-team partnership rather than product-team partnership. If your week is SAST and SCA across product squads, threat models for new designs, OWASP control coverage, and bug-bounty queues, the file belongs in the AppSec pile. If you also carry endpoint detection and cloud posture, the Security Engineer guide is the better read. If your week is securing the pipeline itself rather than the product code shipping through it, a DevSecOps page (in the pipeline) is the right next step.

Helpful, but not load-bearing. Strong AppSec candidates lean defender-first: secure design reviews, threat modeling, SAST and SCA tuning, secure code review, bug-bounty triage, security-champion enablement. Offensive technique reading shows up indirectly through Burp Suite Pro proficiency, the ability to validate a SAST finding against a running build, and a working sense of OWASP Top 10 exploitation patterns. An OSCP, OSWE, or OSWA on the page lifts the file at L2 and L3 because it signals the candidate can read a SAST report, write a working proof of concept against the staging cluster, and explain to a backend engineer why the finding is exploitable in the actual code path rather than only in a scanner abstract. If your background is pure defender and you have no offensive credential, lead the page with threat-modeling cadence, ASVS coverage, false-positive rate, and supply-chain artifacts instead. The senior chairs care more about whether developers ship safer code after you partner with them than whether you can pop a shell.

OSWE (Offensive Security Web Expert) is the AppSec-specific credential a panel filters on hardest because it tests source-to-exploit web vulnerability discovery through actual code review, which is the closest paper proxy for the day job. OSCP remains the most-screened offensive credential and is still useful at L1 and L2 even when the chair is defender-first, because it signals you can validate a finding rather than only read a scanner output. OSWA (Offensive Security Web Assessor) is the web-focused offensive credential one tier below OSWE and lands well at L2. GWAPT (GIAC Web Application Penetration Tester) is the SANS-side web-AppSec credential most US enterprise reqs accept as the OSWE alternative. CSSLP (ISC2 Certified Secure Software Lifecycle Professional) is the secure-SDLC governance credential read for senior chairs that own AppSec program design. CASE (EC-Council Certified Application Security Engineer) lands at L1 and L2 as a foundational AppSec credential for candidates entering from QA or junior developer roles. List them on a single Certifications row near Education, name the issuing body (Offensive Security, SANS, ISC2, EC-Council), and hold off on in-progress sits until the test date is locked.

Five number families turn an AppSec bullet from filler into ownership in 2026. Product-squad scope supported with the SAST or SCA tool named (rolled out Semgrep and Snyk across 14 product squads, triaged 320 SAST findings to a 4.2 percent false-positive rate over 9 months). Threat-modeling cadence with the framework named (facilitated 28 STRIDE sessions across new designs in 4 quarters, shipped documented mitigations on 94 percent of high-risk threats before code merge). OWASP ASVS coverage with the level and audit window pinned (cleared OWASP ASVS Level 2 across 22 tier-1 services ahead of the SOC 2 Type II audit window, retired 18 broken-object-level-auth patterns on the GraphQL surface). Bug-bounty triage with the platform and MTTR named (managed the HackerOne queue handling ~140 valid reports per year, cut critical-severity MTTR from 22 days to 6 days). Supply-chain artifact coverage with the toolchain named (stood up SBOM generation through Syft and CycloneDX on 9 tier-1 services, signed every production image with Sigstore cosign, attested to SLSA Level 3 on the payments pipeline). Vague verbs without a squad count, a tool name, a false-positive rate, a threat-modeling cadence, or an ASVS level read as filler; the strong bullet pins one or two of these numbers to a named AppSec stack and a real outcome.