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Kalkutin

Services

Backend and integration development

Data, payments, client accounts, exchange with your CRM and accounting systems. An architecture that is easy to grow, and monitoring that notices problems before your customers do.

What is included

What the work includes

  1. 01

    API and database

    A backend for the website, the app and your partners: one source of data, clear interfaces, documentation. Handles tenfold growth without a rewrite.

  2. 02

    CRM, ERP and payment integrations

    Exchange with Bitrix24, amoCRM, HubSpot, 1C, your warehouse, bank and delivery services. Data moves on its own, without manual re-entry or mismatches.

  3. 03

    Process automation

    A form submission lands in the CRM, the invoice issues itself, the manager gets a notification. Where text or documents need understanding, we add language models.

  4. 04

    Improving an existing system

    We get into someone else’s code, close vulnerabilities, speed up slow parts and extract what is holding growth back. Without stopping the business.

Who it is for

A good fit if

  • Data lives in five systems and never adds up
  • Staff move information by hand
  • The service slows down or falls over as load grows
  • You need an API for partners, an app or a new website

What we build with

  • Node.js
  • NestJS
  • TypeScript
  • PostgreSQL
  • MongoDB
  • Redis
  • Kafka
  • GraphQL
  • Keycloak

How the work goes

  1. 01Discovery and estimate
  2. 02Design
  3. 03Build
  4. 04Launch
  5. 05Growth
More about the process

Work

Related projects

See our work

Fintech · 2020travelex.co.uk

Travelex currency exchange platform

Buying currency and a travel money card online, customer verification, international transfers. A back office that made processing operations one and a half times faster.

$1B
in transactions a month
+50%
faster operation processing

E-commerce · 2024spodial.com

A store inside Telegram

A catalogue of tens of thousands of products, payments and delivery without leaving the messenger. Integrated with a CRM, a call centre and a loyalty programme.

AI · Team tools · 2026intentra.kalkutin.cc

Intentra — context for the team and AI

Our own product. Turns discussions into approved requirements and hands them to AI agents through MCP.

×10
faster development cycle
−90%
development cost

Pricing

What it costs

from $500

two-week assessment

Backend tasks rarely look alike, so we start with an assessment: a review of the system, a plan and an estimate. Its fee counts towards the project.

All options and what they include

FAQ

Questions about this service

Contact

Tell us about the task

We answer to the point and without scripts. The person who will lead the project writes back to you.

  • A short conversation, no commitment
  • Scope and price before we start
  • NDA on request
Budget