Application & Product Security · Montreal · Remote engagements

Senior application security, built into engineering.

Deovis helps engineering teams secure complex applications, APIs and cloud-native architectures. From risk analysis through control implementation, Deovis contributes to architecture decisions, integrations and development practices, then validates the resulting changes with the teams delivering them.

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15+ years in cybersecurityOSCP certifiedIBM X-Force Red · ServiceNow · Element AI · OKIOK DATA

Services

Application security across the engineering lifecycle, with specialist expertise in architecture, identity and cloud-native systems.

01 / design

Secure Design & Threat Modeling

Identify security risks before they become expensive engineering problems.

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Review architectures, data flows, trust boundaries, identity models and sensitive integrations to uncover design weaknesses early and define practical security requirements.

  • Architecture & data-flow reviews
  • Threat modeling & abuse cases
  • Authentication & authorization design
  • OAuth/OIDC & token architectures
  • Multi-tenant isolation & trust boundaries
  • AI/LLM feature threat modeling

Deliverables → Architecture & trust-boundary diagram · Prioritized threat model · Abuse cases · Security requirements · Mitigation plan

02 / validate

Application & API Security Assessments

Test how applications fail under realistic attack conditions.

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Combine manual offensive testing, application mapping and targeted code analysis to uncover vulnerabilities in authorization, identity flows, tenant boundaries and business logic that automated scanning often misses.

  • Web application security testing
  • REST & GraphQL API assessments
  • Authentication & authorization testing
  • Multi-tenant isolation & BOLA/BFLA
  • Business logic & complex attack paths
  • Targeted secure code review
  • Mobile application security
  • AI/LLM application attack paths
  • Remediation validation

Deliverables → Assessment report · Prioritized vulnerabilities · Evidence & exploitation paths · Remediation guidance · Remediation validation

03 / architect

Identity & Cloud-Native Security

Secure the trust relationships connecting users, services and workloads.

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Assess authentication and authorization architectures alongside cloud-native infrastructure to understand how identities, tokens, workloads and network boundaries interact, and where trust assumptions can fail.

  • OAuth 2.0 & OpenID Connect
  • JWT & token lifecycle
  • Token exchange & internal identity
  • API authorization models
  • AWS IAM & application perimeter
  • Kubernetes & EKS security
  • Istio, mTLS & service identity
  • Workload identity & service-to-service authorization
  • Cloud-native attack paths

Deliverables → Identity & trust-flow mapping · Control & configuration analysis · Attack scenarios · Prioritized risks · Target architecture & security roadmap

04 / enable

AppSec Engineering & Technical Leadership

Strengthen security controls and support their implementation with engineering teams.

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Deovis contributes to AppSec tooling integrations, control automation and vulnerability management workflows, helping teams set priorities, resolve technical dependencies and validate changes through adoption.

  • SAST, SCA & CI/CD security integration
  • Triage & vulnerability workflow automation
  • Security configuration & integration support
  • Prioritization & technical remediation coordination
  • Change review & control validation
  • Documentation & knowledge transfer

Deliverables → Prioritized backlog · Controls & integrations within the agreed scope · Implementation plan · Validation tests · Technical documentation

Ways to work together

Flexible ways to bring senior AppSec expertise into the work.

How engagements work

From security question to engineering outcome.

  1. 01
    Understand the system

    Start with how the system actually works: architecture, data flows, identities, trust boundaries, critical assets, and engineering constraints. Identify where security assumptions matter most before testing begins.

  2. 02
    Assess what matters

    Combine architecture analysis, threat modeling, manual testing, code review, and targeted automation as needed. Focus on realistic attack paths and prioritize risks by exploitability, impact, and business context.

  3. 03
    Strengthen & validate

    Turn findings into practical design or implementation changes with engineering teams. Review proposed fixes, challenge remaining assumptions, and validate that critical controls work as intended.

Architecture → Threats → Attack paths → Engineering changes → Validation

Why Deovis

Deep AppSec expertise, grounded in engineering reality.

Deovis combines offensive security, architecture and application security experience to examine the areas that most often shape application risk: design decisions, code, APIs, identity boundaries, cloud-native infrastructure and delivery pipelines.

Each engagement starts with understanding the system and the attack paths that matter. Findings are translated into practical recommendations, with support to review and validate the resulting changes.

FocusApplication security, architecture and complex cloud-native systems
ApproachOffensive security expertise, architecture analysis and close collaboration with engineering teams
Experience15+ years in security · OSCP · IBM X-Force Red · ServiceNow · Element AI

A good place to start

Need senior AppSec expertise for a critical system, architecture decision, or engineering initiative?

Contact Deovis