Application Security
Security that works with engineering, not against it.
Application security fails when it is bolted on late, enforced without context, or designed without understanding how developers actually work. Security gates that block deployments without clear remediation paths create adversarial relationships. Vulnerability backlogs that grow faster than remediation erode trust in the program. Generic secure coding standards that developers cannot apply to their actual stack get ignored.
Deep Layer designs AppSec programs with an adoption-first philosophy. Secure SDLC integrated into existing workflows. Pipeline security with calibration-before-enforcement — rulesets tuned against your actual codebase before blocking is enabled. Standards written with code examples in your languages. Findings delivered in pull requests, not PDFs.
Challenges We Address
The problems that bring clients to us.
Security Bolted On Late
Security review happens after development is complete. Findings require architectural changes that are too expensive to fix late in the cycle.
Pipeline Without Security Gates
CI/CD deploys code to production with no secrets detection, no SAST, no dependency scanning, and no container image verification.
Vulnerability Backlog Growth
Scanners produce findings faster than engineering can remediate. No risk-based prioritization. No SLA governance. The backlog becomes noise.
Standards Without Code Examples
Secure coding standards written in abstract security language. Developers cannot translate generic OWASP guidance into their framework and language.
SaaS Security Questions
Customer security questionnaires require evidence of AppSec practices that do not exist. No SBOM, no pen test reports, no SDLC documentation.
Ideal Clients
Who this is built for.
Service Offerings
What we deliver.
AppSec Program Design
Program DevelopmentComplete application security program — Secure SDLC framework, pipeline security architecture, coding standards, developer enablement, governance model, and threat modeling toolkit.
Secure SDLC Program Build
Program DevelopmentImplement a Secure SDLC across your development organization — security requirements, design review, code review, testing, and release verification integrated into existing workflows.
Pipeline Security Implementation
ImplementationEmbed security controls into CI/CD — secrets detection, SAST, SCA, container scanning, IaC security, and SBOM generation with calibration before enforcement.
Penetration Testing (Web / Mobile / API)
AssessmentApplication penetration testing covering OWASP Top 10 and API Top 10 — scoping, execution, findings with reproduction steps, and remediation guidance.
SaaS Application Security Assessment
AssessmentSecurity evaluation of SaaS applications — multi-tenancy isolation, API security, data protection, authentication architecture, and compliance mapping.
Software Supply Chain Security
Program DevelopmentGovernance program for the dependencies, suppliers, and build artifacts your software relies on — dependency risk policy, SBOM program, supplier assessment framework, and SLSA alignment roadmap.
Penetration Testing
AssessmentAdversary-perspective testing of applications, infrastructure, and cloud environments — every Critical/High finding is actually exploited, not assumed. Includes attacker narrative and remediation retest.
API Security Assessment
AssessmentManual API security assessment identifying authorization failures, data exposure, and business logic flaws that automated scanners miss — OWASP API Security Top 10 coverage with proof-of-concept requests.
Secure Code Review
AssessmentManual security review of application source code — injection flaws, auth weaknesses, authorization bypasses, cryptographic errors, and logic issues identified at the file, function, and line number level.
Threat Modeling Workshops
Design & ArchitectureStructured threat models for in-scope systems — facilitated workshops producing data flow diagrams, STRIDE threat analysis, security requirements, and prioritized controls before code is written.
Developer Security Training
ImplementationHands-on secure coding training calibrated to your team's specific language stack and framework — not generic OWASP slides. Practical exercises, quick reference cards, and materials you own.
Frequently Asked Questions
Common questions.
Do you perform the penetration testing or coordinate it?
Both. Deep Layer performs web, mobile, and API penetration testing directly. For specialized testing (hardware, wireless, physical), we scope and coordinate with vetted specialists.
What languages and frameworks do you write secure coding standards for?
Standards are tailored to your stack. Common languages include TypeScript/JavaScript, Python, Go, Java, C#, and Rust. Standards include framework-specific examples (React, Django, Spring, .NET, etc.).
How do you prevent DevSecOps from slowing down development?
Calibration before enforcement. Rulesets are tuned against your actual codebase before blocking is enabled. A notification period lets developers see findings without being blocked. Only after tuning and baseline are established do gates become enforcing.
What is the difference between a penetration test and a secure code review?
A penetration test finds vulnerabilities from the outside — what an attacker can exploit over the network. A secure code review finds vulnerabilities at the source code level — implementation errors invisible to external testing, like hardcoded credentials, cryptographic misuse, or authorization logic bypasses. They are complementary.
What does Software Supply Chain Security cover that DevSecOps does not?
DevSecOps embeds scanning into your CI/CD pipeline. Supply chain security addresses the governance layer — dependency risk policies, SBOM programs, supplier security assessments, SLSA build provenance, and software transparency packages for customers and regulators.
Ready to discuss application security?
30-minute discovery call. We will discuss your environment, your challenges, and whether there is a fit — no sales pitch.