Jędrzej Siewierski
CEO · Founder · 10+ years of experience in 3D / Three.js / Next.jsDiscovery lead on the Akpil project. Full stack: strategy → architecture → code → deployment.
JSON Crew · About Us
A software company that doesn't start with code.
A software company that doesn't start with code.
It starts with the profitability of the process.
Software development company + consulting agency + JSON Crew. Specialization: B2B quote carmation (Configure, Price, Quote). An MVP in 8 weeks, not 8 months.
2d → 30 minutes
Akpil · valuation time
12 000+
devices · KG IoT
7 steps
Forest · Live 3D Weapon Configurator
8 weeks
MVP instead of 8 months
What have we actually done?
4 implementations, 4 industries, specific figures
Not just „trusted by 150+ compaNos”—we show you the names, the numbers, and exactly what has changed. Hover over an implementation to see a preview and the results.
01_
Akpil :
57 machine types, 16 variants × 30+ options. Sales representatives were receiving 150+ inquiries per week; 60% addressed all of these inquiries. Quotation time: 2 days → 30 minutesuteses.
02_
KG Electronics :
Heating boiler manufacturer. Instead of three separate apps, there is one app for controlling heating via the cloud (AWS IoT). 12,000+ connected devices.
03_
Forest :
7-step configurator: model → stock → wood → caliber → magazine → accessories. The customer sees the price for each selection, generates a PDF, and comes to the store with a final decision.
04_
Showroom network :
5 points of sale, 12 salespeople, personnel costs = 60% in revenue. A B2C configurator instead of a new team—B2C customers make their decisions without having to visit three times.
Band
Three founders, decades of experience
We don’t outsource strategic decisions—we make them ourselves.
Maciej Ramus
CMO · Co-founder · 25+ years of B2B marketing experienceOwner of the cold outreach campaign (Apollo + Make carmation). Leads the JSON Crew.
Bartłomiej Kołodziejork
COO · Co-founder · 10+ years of 3D pipeline experienceCGI/VFX background. Operations + native English-speaking sales lead for export projects.
What sets us apart
4 Things We Do Differently
MVP in 8 weeks
We start with a process map, not by choosing a framework. Traditional agencies: 4 months of discovery + 8 months of development. Us: 1–2 weeks of discovery + 6–8 weeks for an MVP, fixed price.
Custom Configure, Price, Quote + 3D in Poland
We are among the first in Poland to build custom B2B Configure-Price-Quote solutions with 3D configurators. TaCTOn and ThreeKit cost between €50,000 and €200,000 per year for a subscription. With us, you get a fixed price and ownership of the code.
The JSON Crew
Customer community: 24/7 Slack support + weekly live workshops + 2 one-on-one sessions per month + resource library + JSON Hub BASIC included. Check out the Box.
Responsibility for the effect
We don’t „deliver code”—we deliver business results. After the UX/UI design phase (Phase 2), you’ll see a clickable prototype on the staging environment—you test it before a single line of code is written. Approval is up to you. A 24-hour SLA yeses effect upon launch.
How we work
From „We Have a The problem” to „The System Is Working” in 5 Steps
Each phase has a specific timeline, deliverable, and acceptance criterion. No „it depends” and no Time and Materials-style fiddling with the hours.
1
Advance payment and kick-off
A 30-minute Discovery+ workshop with your team. We’ll map out the sales process, business rules, and integrations. We’ll schedule the team in the production calendar.
Result: contract + scope of work + milestone schedule.
Payment: 40% deposit.
2
UX/UI Design
Wireframes, business rule diagrams, a design system tailored to your brand, and a clickable prototype on the staging environment. You test it live, provide feedback, and we iterate 1–2 times before the code goes live.
Result: clickable prototype + design system + decision document.
3
Customer approval
UX/UI design sign-off. Final revisions (if any). We won’t start coding without your approval—we protect your budget by avoiding work on an endless project.
Result: Approved design + frozen scope of work.
Payment: the next 40% (milestone).
4
Development
2-week sprints with a review during staging after each sprint. Your team tests as they go, not after the sprint is over. Internal code review + your access to the repo.
Result: production-ready system on staging, technical documentation.
5
Implementation and testing
Deploy to production with a rollback plan. UAT with your team (sales, IT, warehouse). Training on how to use the CMS dashboard—your team will manage content, prices, and options on their own.
Result: Production system + training + 24-hour SLA for critical errors.
Payment: the final 20% (after implementation).
Next step
Three paths, depending on where you are
Not everyone is ready for a 30-minute conversation from the first contact. Choose a pace that suits you.
See the showroom
12 interactive demos (3D + calculator). No contact, no obligations—see for yourself how we build.
Open the showroom →Check your budget
Cost estimator — 5 questions, price range in PLN at the end. No email required, yeses 3 minutes.
Open the estimator →Schedule a discovery session
30 minutesuteses with the founder. A concrete implementation plan for your company. No slide presentations.
Schedule a meetingFrequently Asked Questions
Everything decision-makers ask about during the first interview
↓How much does it cost to implement the configurator?
MVP Configurator: from 49,00PLN 0 (Starter — Category 1, up to 20 variants) to 89,00PLN 0 (Pro - full configuration, Customer Relationship Management integration, multi-language). Larger projects with 3D Three.js and ERP: PLN 90,000–300,000. JSON Hub SaaS: PLN 1,500/month (BASIC). We provide a specific quote after a 30-minute discovery period.
↓How is JSON Crew different from other software compaNos?
We don’t start with code—we start with a process map and a profitability analysis. Traditional agencies sell hours (Time and Materials) and a 4-month discovery phase plus 8 months of development. We offer a fixed price, an MVP in 8 weeks, a UX/UI design approved before coding begins, and accountability for the business outcome—not just for „delivering the code.”.
↓How are we different from TaCTOn, ThreeKit, and Salesforce Configure, Price, Quote?
These are subscriptions ranging from 50,000 to 200,000 EUR per year, where you don’t have access to the code or full control over the logsc. We build a custom Configure, Price, Quote + 3D solution tailored to your process: a fixed implementation price, ownership of the code, any integrations (Customer Relationship Management/ERP), and no vendor lock-in. For complex, specialized catalogs, this is more cost-effective and flexible.
↓What if the implementation fails?
We mitigate risk in stages with acceptance milestones: after the UX/UI design (Stage 2), you test a clickable prototype on the staging environment before a single line of code is written—the decision to accept it is yours. Payments are spread out across milestones (40/40/20). After launch, we provide a 24-hour SLA for critical errors and a guarantee of increased RFQs from the configurator.
↓What compaNos do you work for?
B2B manufacturers and distributors with extensive product catalogs, variants, and complex pricing (machinery, IoT, weapons, woodworking, equipment), as well as B2C compaNos with complex quoting processes. Sweet spot: 10+ employees, recurring RFQs, and pricing chaos.