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Software & sales systems & B2B dashboards

JSON Crew is a software house with one specialization: digital sales transformation for B2B manufacturers and distributors. We build the systems that shorten the path from a customer's first interest to a signed contract.

We don't sell isolated features — we build one connected system, layer by layer, wherever a company loses customers:

  • Min project size
    $10,000+
  • Hourly rate
    $50 - $99 / hr
  • Employees
    2 - 9
  • Locations
    Kraków, Poland
  • Year founded
    Founded 2025
  • Languages
  • Timezones

Overview by:

Reviewer avatar
Bartłomiej Kołodziejczyk

2 Languages that we service

  • English
  • Polish

1 Timezone that we service

CET
Central European Time (CET)

1 Locations

  • Kraków , Poland

Select Focus Area
Application Platforms
Amazon Application Development Framework
65%
Azure Platform
10%
Linux server
10%
Windows server
5%
CRM Functions
CRM Customer Support
20%
CRM Social Relationship Management
20%
Other CRM focus
20%
Sales automation
20%
CMS Focus
CRM Solutions
Responsys CRM Consulting & Implementation
15%
RightNow CRM Consulting & Implementation
15%
Adobe CRM Consulting & Implementation
10%
ExactTarget CRM Consulting & Implementation
10%
Marketo CRM Consulting & Implementation
10%
IBM CRM
5%
Mobile Platforms
Programming & Scripting
Typescript
60%
HTML5
10%
PHP
10%
SQL
10%
Industries
Manufacturing
40%
Construction
20%
Energy & natural resources
15%
Consumer products & services
10%
eCommerce
10%
Legal
5%
Clients
Small Business (<$10M)
60%
Midmarket ($10M - $1B)
30%
Enterprise (>$1B)
10%

Pricing Snapshot

Min. project size $10,000+
Avg. hourly rate $50 - $99 /hr
Rating for cost 5 /5

Most Common Project Size

< $10,000 based on 1 review
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

Select a service to see pricing information

Overall Review Rating

4.5
  • Quality

    5.0 /5
  • Schedule

    5.0 /5
  • Cost

    5.0 /5
  • Willing to Refer

    5.0 /5
See all 1 Reviews

JSON Crew Reviews

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Custom Software Development for Electronic Device Company

  • Custom Software Development
  • Amazon Application Development Framework
  • Less than $10,000
  • Apr. - July 2025
4.5
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They did good work."

Jul 21, 2025
Director, KG Elektronik
Gregor Koman
Verified
  • Electric
  • Mielec, Poland
  • 11-50 Employees
  • Online Review
  • Verified

JSON Crew provided custom software development services for an electronics device company. The team developed a smart control app and helped the client launch the app.

Showing 1-1 of 1 Reviews

Our Story

We're JSON Crew!
Three founders who believe sales is a system problem, not a people problem. A manufacturer can have a great product and still sell it like it's 2005, offers in Word or PDF the client never opens. 

  • Jędrzej (CEO, 10+ yrs B2B Strategy & heavy tech FullStack)
  • Maciej (CMO, 25+ yrs B2B marketing) 
  • Bartłomiej (COO, 10+ yrs full-stack, customer success & sales)

We start every project with a process map, not a framework. We design and improve whole sales proccess!

Meet the Team

Bartłomiej Kołodziejczyk

Bartłomiej KołodziejczykCOO

Jędrzej Siewierski

Jędrzej SiewierskiCEO

What Sets Us Apart

We run our own SaaS

We don't just build software — we run JSON Hub, our own CRM and quoting platform. We understand the product side operationally, not just from a brief.

AI-first, 8-week MVP Fixed Price

AI-first delivery (Cursor + Claude). A product configurator MVP in 8 weeks, fixed price, clear scope -> NOT 8 months of open-ended billing.

Process before framework

Every project starts with a process map and the profitability of your sales flow. We scope tightly and turn down projects that aren't a fit.

Verified means Clutch independently confirmed JSON Crew is a legally registered business,
has had its financial risk status checked (Creditsafe: Moderate Risk), and is backed by 1 verified client review averaging 4.5 stars.

Learn More
Verified Client Reviews
1
Overall Review Rating
4.5
Source
Clutch
Last Updated
July 21, 2025

Business Entity

Business Entity Name Json Crew Sp. z o.o.
Source Central Statistical Office of Poland
Jurisdiction of Formation Poland
Date of Formation February 12, 2025
Status Active
Last Updated August 15, 2026
ID 0001155577

Credit Report Results

International Credit Risk Assessment Moderate Risk
Source Creditsafe
Last Updated August 26, 2026
Learn More About The Clutch Verification Process

Locations (1)

Aleja Generała Tadeusza Bora-Komorowskiego 25/P4 p.24 KrakówPoland 31-476

6 - 9

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