Technical Due Diligence
Technical Due Diligence & Architecture Audit
Independent, evidence-grounded technical audits of software codebases, cloud infrastructure, and security risks before acquisition, funding, or major architectural decisions.
Written scope and a fixed-scope proposal. No sales calls.
Who this is for
The buyer this is written for
- Role
- Investor, Private Equity Principal, Non-Technical Acquirer, or Incoming CTO
- Organisation
- An investment firm, acquiring company, or executive team evaluating an acquisition target or reviewing a legacy software asset
- What triggers the search
- An upcoming M&A transaction, investment decision, leadership transition, or unexplained production instability requiring an unvarnished technical assessment.
The problem
What is actually going wrong
Hidden technical debt and single points of failure
Codebases that look functional in product demos often conceal brittle undocumented dependencies, unmaintained third-party libraries, and zero automated test coverage.
Undiscovered security vulnerabilities and data risks
Improper access controls, unencrypted data flows, hardcoded credentials, or non-compliant customer data handling create massive post-acquisition liabilities.
Unrealistic development timelines and scaling limits
Without an architectural baseline, buyers cannot verify if the current codebase can support planned roadmap growth or if it requires an emergency rewrite.
What you get
Delivered in the engagement
- Executive summary with clear red-flag risk matrix categorized by business severity (P0/P1/P2)
- Comprehensive codebase audit covering architecture, code maintainability, and test coverage
- Cloud infrastructure, hosting efficiency, and cost optimization review
- Security, authentication, and data isolation boundary evaluation
- Actionable remediation roadmap with prioritized engineering effort and cost projections
How it runs
The sequence
- 01
Repository & dependency analysis
Perform deep clean-room static analysis, dependency vulnerability scans, and code quality profiling across all repositories.
- 02
Architecture & data flow audit
Trace authentication, database interactions, API integrations, and third-party SaaS dependencies for single points of failure.
- 03
Security & compliance boundary review
Audit data storage, encryption, tenant isolation, and secret management against production best practices.
- 04
Deliver written findings and remediation plan
Produce an independent, factual report detailing findings, risk severity, scalability bottlenecks, and concrete remediation steps.
Evidence
Engagements that prove this
Every claim below is drawn from a recorded engagement. Each links to its full case study, including the trade-offs that were accepted.
Primary evidenceSocial Networking • Jun 2026 • Next.js, PostgreSQL, React, Sentry, Stripe, Supabase, Tailwind CSS, TypeScript
Full-stack audit identifying subscription webhook race conditions and data access vulnerabilities before production scale.
- Discovered and resolved subscription sync failures between Stripe and Supabase
- Audited row-level security policies to prevent cross-tenant data leakage
- Established automated Sentry error monitoring and performance telemetry
Read the full case study →Marketing and Advertising • Jun 2025 • CSS, JavaScript, Laravel, MySQL, Nginx, PHP
Audited high-throughput background processing platform experiencing queue lockouts.
- Diagnosed background job starvation and thread pool contention
- Restructured database connection architecture to eliminate request timeouts
Read the full case study →Healthcare Industry • Aug 2023 • JavaScript, MySQL, PHP, WordPress
Audited healthcare software platform against accessibility and security compliance baselines.
- Evaluated data isolation boundaries to ensure compliance awareness
- Verified WCAG contrast and screen-reader accessibility across core interfaces
Read the full case study →Wider evidence: Diagnostic Audits draws on 106 recorded engagements, from a corpus of 106 documented projects.
Questions
Answered directly
How long does a technical due diligence audit take?
Standard technical due diligence audits are completed within 5 to 10 business days, delivering a comprehensive written risk report and executive presentation.
Do you require team interviews or only repository access?
We prioritize codebase and infrastructure evidence first (repos, CI/CD, cloud configs). Brief technical interviews with key leads are conducted to clarify undocumented architecture and processes.
Is the audit confidential?
Yes. All audits are conducted under strict non-disclosure agreements with clean-room access protocols and no external data sharing.
This page answers
- Who conducts technical due diligence on software companies before acquisition?
- What should be included in a software codebase technical audit?
- How to evaluate technical debt and architecture risks in an M&A deal?
- Independent code review and SaaS architecture due diligence consultants
- Pre-investment software security and infrastructure audit checklist
Start a written project inquiry
Describe the target codebase, technology stack, business context (M&A, investment, turnaround), key concerns, and required turnaround timeline.
You describe the problem in writing. You receive a written scope, an approach, and a fixed-scope proposal.
