Kostiantyn Chaiun
@kostiantynchaiun
Full bio (About) Kostiantyn Chaiun specializes in building Telegram bots and automating operational workflows. His focus is turning routine, error-prone tasks into transparent, measurable flows: lead generation, sales funnels, bookings & payments, logistics, customer support, internal policies, reporting, and analytics. Kostiantyn combines engineering rigor (architecture, security, testing) with product thinking (metrics, usability, scalability). He starts from the business goal: maps the process (BPMN/diagrams), formalizes rules, selects tech and integrations, ships an MVP, measures the key metrics, and iterates. Every project comes with documentation (requirements, diagrams, Swagger/OpenAPI), team instructions, and monitoring to ensure stability. He works with online education, e-commerce, local services, infobusiness, and SaaS. Kostiantyn sets up CRM and payment integrations, notifications, reporting, roles & permissions, and moves workflows from “spreadsheets and chats” into managed, automated scenarios inside Telegram and connected systems. Skills & Tech Stack Languages & Platforms Python (FastAPI/Flask, aiogram/Telethon), Node.js/TypeScript (Telegraf, NestJS) SQL/NoSQL: PostgreSQL, MySQL, MongoDB; caching: Redis Queues & background jobs: Celery/RQ/RabbitMQ Integrations: REST/Webhooks, OAuth/JWT, webhook signatures Telegram & Automation Telegram Bot API, Inline mode, Keyboards, Web Apps/Mini Apps Payments (where available): TG Payments/Web checkout, invoices, billing Funnels: lead magnets, quizzes, auto-messaging, segmentation, triggers Auto-support: answer bases, operator escalation, SLA logic Document flows: requests/invoices/acts, file uploads, statuses & routing n8n/Make/Zapier: no-code integrations and custom nodes Integrations: amoCRM/Bitrix24/HubSpot, Notion/Airtable/Google Sheets, Slack/Discord Payments & Finance Stripe, Fondy, LiqPay, WayForPay, PayPal (invoices/checkout/webhooks) Subscriptions, trials, duplicate-charge prevention, refund workflows Transaction logging, reconciliation, report exports DevOps & Quality Docker/Docker Compose, GitHub Actions (CI/CD) Monitoring & alerting: Sentry, Prometheus/Grafana, logging Testing: Pytest/Jest, load testing, canary releases Security: roles/permissions, secret storage, encryption, GDPR-minded handling Data & AI (as needed) ETL/replication to DWH, dashboards (Metabase, Superset) LLM/AI assistants in bots (request handling, classification, summarization) Why it helps your business (benefits of working with Kostiantyn) Business-oriented architecture. Built around metrics (leads, conversions, support AHT, LTV/churn) rather than a random feature list. Automation from process map to release. Formalized policies, diagrams, specs, MVP, docs, and team training. Reliability & predictability. Tests, monitoring, event logs, alerts — fewer manual checks and “fire drills.” Integrations without drama. CRM, payments, sheets, inventory, service desk — with proper webhooks/limits/retries. Scalability. Queues, caching, schema versioning, feature flags — safe to grow traffic and scope. Transparency. Clear instructions, checklists, and diagrams — systems live inside the company, not only “in the dev’s head.” Security & compliance. Access controls, secret management, sensible data practices. Support & improvements. Post-release sprints, feedback loops, A/B ideas to lift conversion and reduce costs. Typical deliverables Lead-gen & quiz bots with qualification and auto-write to CRM. In-Telegram sales: catalog, cart, invoices, statuses, manager chat. Support/Service Desk: FAQ + escalations, prioritization, SLAs, reporting. Internal team bots: leave/purchase requests, approvals, alerts, checklists. Accounting & reporting: automated KPI collection and exports for finance/marketing. Workflow (at a glance) Diagnostics: goals, metrics, pain points, process map. Design: specs, diagrams, prototypes, integration plan. MVP build: short iterations, demos, feedback. Launch: documentation, team onboarding, monitoring. Improvements: metrics, experiments, scaling. Engagement models Turnkey project. From analysis to launch and maintenance. Iterative growth. Improvement backlog, retainer/support. Audit & architecture. Review of the current system and a practical roadmap. Short version (for site/card) I build Telegram bots and automate business processes: sales, support, bookings, payments, reporting, and CRM/accounting integrations. I deliver robust architecture, clear specs, and documentation, with monitoring and alerts. Projects go live “ready to run” — with metrics, logs, and a growth plan.
$685.51 Earned
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Berkhamsted, GB
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Joined Sep 2025
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