Proposals
A proposal is a prediction about work nobody has done yet. What matters is not the confidence of the prediction but whether it exposes its own reasoning: what was assumed, what was excluded, and what happens when an assumption turns out wrong.
Every estimate rests on assumptions. Stated ones can be checked and challenged. Unstated ones become change requests.
Items you can recognise, with days against each. A single figure for 'development' cannot be evaluated, only accepted or refused.
The person who wrote the proposal is often not the person who writes the code. Ask for the name and the experience of whoever will actually be assigned.
Read these before you look at the total. They determine whether the total means anything.
A large spread between quotes almost never means one supplier is dishonest. It usually means they scoped different amounts of work, because your brief left room to.
The cheap one may have assumed your existing system has a working API, that you will supply the designs, that data migration is your problem, and that testing means the developer clicking through it once. The expensive one may have assumed the opposite of each.
Neither is wrong until you compare them against the same assumption list. Ask both suppliers to price the same explicit set, and the gap usually collapses to something reasonable.
A proposal that makes no demands on you is a warning sign. Real projects need decisions, content, access and review time from the client, and a supplier who has thought about the schedule knows this.
Look for stated dependencies on your side, with dates. Their absence usually means the timeline is decorative, and that when it slips the reason offered will be that you were slow.
Fixed price moves risk to the supplier, and the supplier prices that risk. Expect a padding of a third or more, and expect firm resistance to anything not written down.
Time and materials keeps the risk with you and costs less when the work is well understood, but it requires you to pay attention. For most small projects, a fixed price for a well-defined first phase followed by time and materials for the rest is the arrangement that goes wrong least often.
Not necessarily, but find out what it excludes. Usually the difference is testing, data migration, or the assumption that you supply designs and content.
Detail helps only if it is specific to you. Twenty pages of generic methodology is not more informative than one page of assumptions about your actual system.
Khmelnytskyi, Ukraine
Full-Stack Developer — Websites, Apps, Servers, Databases, AI, SEO & QA
Full-stack developer working across the entire stack — websites, apps, servers, databases, AI integrations, SEO, and QA. Languages & Core: writes code in JavaScript, TypeScript, Python, PHP, Go, and Rust. Architects scalable systems for large-scale projects. Frontend & Interfaces: builds websites and web applications with React and Next.js. Crafts responsive interfaces with Tailwind CSS, Radix UI and Shadcn, adds smooth animations with Framer Motion, and interactive charts with Recharts. SEO Audit & On-Page Optimization: semantic keyword research, resolving technical indexing issues, and optimizing page load speeds. Structures page architecture, meta tags, and multi-language support (i18n). Copywriting & Content Strategy: writes technical articles, drafts precise content briefs for writers, and develops content plans. QA & Testing: full-cycle testing for websites, web services, and Android apps — manual QA for UI/UX and business logic, plus automated testing with Jest, Vitest, Playwright and E2E. Backend, Cloud & Databases: complex API integrations of any scale. Builds servers with Node.js (Express, Fastify). Works with PostgreSQL, MySQL and MongoDB, ORMs (Prisma, Drizzle), and cloud infrastructure (Supabase, Firebase, Cloudflare). Browser Extensions & Automation: develops Manifest V3 browser extensions for Chrome, Edge, Firefox and other browsers. Builds web scrapers for complex data extraction using Puppeteer and Playwright. AI & Intelligent Agents: builds custom AI agents and integrates LLMs from OpenAI, Google Gemini, and Anthropic Claude via API, including Claude Code setups. Servers & DevOps: Linux (Ubuntu) and VPS administration — setup, updates, real-time monitoring, secure process isolation, Nginx, PM2, and CI/CD deployment via GitHub Actions. Telegram Bots: develops advanced Telegram bots (Telegraf, Grammy) integrated with AI, payment gateways, Google Sheets, and crypto exchanges. Desktop Applications: builds cross-platform software for Windows and macOS using Electron and Rust. Additional expertise: site development and customization with WordPress and Astro.
AI & Distributed Systems Architect | Enterprise AI, RAG, Cloud, Blockchain | Advisory & Fractional Leadership
AI and distributed systems architect providing advisory and fractional leadership on enterprise AI, RAG pipelines, cloud architecture and blockchain-backed data systems.