Serge BelovTechnical Specifications Writing
Turn your business vision into a developer-ready blueprint.
What this is
Bad specs are why projects go over budget and deliver the wrong thing. I work with you to translate business requirements into precise technical specifications — detailed enough that any competent developer can build from them, flexible enough to survive real-world changes.
Who it's for
- Non-technical founders preparing to hire a development agency or freelancers
- Product managers who need to align engineering and stakeholders before sprint planning
- Businesses going through a tender process and needing technical documentation
- Teams starting a new project who want to de-risk the build phase
Problems it solves
- Developer estimates vary wildly because the requirements aren't clear
- Features get built wrong because the original intent wasn't captured
- Scope creep derails projects because boundaries weren't defined upfront
- Non-technical stakeholders and developers can't communicate effectively
What you get
- Comprehensive technical specification document (PDF and Markdown)
- User story map with acceptance criteria for each feature
- System architecture diagram
- Data model and entity relationship overview
- Third-party integration list with API requirements
- Open questions and decision log
How it works
- 1
Discovery session
A structured 90-minute session where I extract requirements, goals, constraints, and non-negotiables.
- 2
Clarification
I identify ambiguities and open questions, then resolve them with you asynchronously before writing begins.
- 3
First draft
Full spec document delivered within 5–7 business days of the discovery session.
- 4
Review
One structured review round: you mark up the doc, I address every comment and rewrite as needed.
- 5
Final delivery
Final document delivered in PDF and Markdown. Ready to hand directly to developers.
Pricing
From $500
Fixed price for the defined scope. No hourly billing, no surprises.
Optional add-ons
Project estimation
Based on the spec, I provide a realistic time and cost estimate range you can use for budgeting or vetting quotes.
Vendor selection support
I help you evaluate developer proposals against the spec, flag red flags, and recommend the right fit.
Additional revision round
A second structured review and revision pass beyond the included round.
API specification (OpenAPI)
Full OpenAPI spec for any APIs to be built, ready for developer or documentation tooling.
Frequently asked questions
How detailed does the spec get?
Detailed enough that a developer who's never spoken to you can understand the system, the business rules, and every feature's expected behavior. Typically 20–50 pages depending on project complexity.
What if requirements change after the spec is written?
Specs should be living documents. I deliver in Markdown so you can maintain it. If changes are significant, I offer paid revision sessions to update the spec.
Can you work from an existing codebase?
Yes. If you're adding features to an existing system, I'll review the codebase before writing the spec to ensure technical compatibility.
Do I need to be technical to work with you on this?
Not at all. My job is to bridge the gap between your business knowledge and technical implementation. You speak business; I translate it.
Can this spec be used for a tender or RFP?
Yes, absolutely. Many clients use the output directly as their technical brief for agency tenders or freelancer RFPs.
Ready to get started?
Describe your situation and I'll tell you exactly how I can help — or be straight with you if I'm not the right fit.