Technical due diligence is a real gate for software companies. Build to pass it.
Investors evaluating software companies at seed and Series A look for specific signals in the codebase, architecture, and deployment setup. A product built to production standards passes this review. A product built quickly without discipline fails it — or gets through with conditions that require remediation before close. We build to the standard that passes.
You have an investor looking at your technical product and you need your codebase and architecture to hold up to scrutiny.
Technical due diligence for software companies varies in depth by investor type and stage: a seed investor might spend 2 hours in a technical call asking architecture questions; a Series A investor might send an external CTO or technical partner who reviews the codebase, the deployment setup, the security posture, and the scalability story over 2–3 days. Both types of diligence are looking for the same signals, just with different levels of depth.
The signals a technical reviewer looks for in a production application: TypeScript with strict mode (indicates the team takes code quality seriously, reduces the risk of runtime type errors at scale); authentication implemented correctly (server-side session validation, no credentials in client-side code, no JWTs stored in localStorage); multi-tenant architecture if B2B (data isolation between customers, demonstrating that the product is built for the enterprise, not a single-tenant prototype); test coverage for critical paths (not necessarily 100% coverage, but evidence that the important workflows are tested); production deployment infrastructure (not running on a developer's laptop, hosted on infrastructure with monitoring and alerting); and documentation (README, architecture overview, deployment runbook — evidence that the team could be replaced without the product dying).
The red flags that technical reviewers flag: any types throughout the codebase; credentials in git history; row-level security absent in a multi-tenant application; no error monitoring; a production environment that's deployed manually without a CI/CD pipeline; and N+1 database queries that will collapse under load.
A product built to the technical standards that pass investor due diligence — TypeScript, secure authentication, documented architecture, production deployment, and the codebase quality signals that a technical reviewer will assess positively.
TypeScript strict mode throughout
`strict: true` in tsconfig.json, no `any` escapes, generated types from the database schema. The reviewer sees a type-safe codebase where the compiler is doing real work.
Secure authentication and authorisation
Clerk with server-side session validation on every API request. Row-level security in Postgres for data isolation. RBAC enforced at the API layer, not just the UI. The OWASP Top 10 vulnerabilities addressed by default (injection prevention via parameterised queries, XSS prevention via React's DOM escaping, CSRF protection, secure headers).
Multi-tenant architecture
Clerk Organisations as the tenant primitive. Organisation-scoped data access enforced at the database and API layers. The architecture that a reviewer will recognise as production multi-tenant SaaS.
Production deployment with CI/CD
Vercel with GitHub Actions integration — every PR builds and deploys a preview environment, every merge to main deploys to production. Environment variables managed in Vercel (not in repository). Sentry for error monitoring with alert configuration.
Architecture documentation
README with project overview, local development setup, and deployment instructions. Architecture overview explaining the key design decisions. Database schema documentation. The documentation that tells a reviewer the team understands their own system.
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
A product built to the technical standards that pass investor due diligence — TypeScript, secure authentication, documented architecture, production deployment, and the codebase quality signals that a technical reviewer will assess positively.
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Technical diligence readiness is a defined quality standard. Fixed scope, fixed price with that quality standard as the baseline.
Related engagements.
Your Series A investors are sending in a technical due diligence firm. You need to be ready.
Read more02Seed stage means you have the funding and a hypothesis. Now you need the product.
Read more03The application works. The codebase is holding the business back. Here's how to modernize it without a big-bang rewrite.
Read moreQuestions, answered.
The areas typically covered: codebase quality (TypeScript, linting, code organisation, test coverage); security posture (authentication, authorisation, data access controls, dependency vulnerabilities); scalability architecture (database design, caching, infrastructure); deployment and operations (CI/CD, monitoring, incident response); and documentation (README, architecture, onboarding documentation). The depth depends on the investor and the stage.
A codebase assessment before a raise is a common engagement type. The assessment identifies the specific issues a reviewer would flag, prioritises them by severity, and provides a remediation plan. Minor issues (missing documentation, inconsistent TypeScript usage) can be addressed in 2–4 weeks. Architectural issues (no multi-tenancy, missing security controls) require longer remediation.
Yes — architecture documentation, security architecture overview, scalability roadmap, and the technical section of the data room are common post-build deliverables. The documentation is derived from the actual architecture of the application, not written generically.
Applications built from scratch to diligence-ready standards: $25k–$65k. Diligence remediation for existing applications: $8k–$35k depending on the issues identified. Fixed-price.
New build: 10–14 weeks. Diligence remediation: 4–10 weeks depending on the scope of issues.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.