Open Mercato Full Stack Development & Support

Open Mercato
Full Stack Development & Support

Talk to Open Mercato engineer Open Mercato Support

Software development and IT | Elite Support™ powered by AI
accelerating your time-to-market by up to 3x for:

Next-Gen eCommerce Architecture

Enterprise-grade speed and flexibility from day one

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Composable, modular ERP/CRM engine

Built to Scale, Not to Rebuild

We design Open Mercato implementations with one goal: long-term scalability without tech debt or platform migration.

Enterprise ERP/CRM delivery
faster ERP/CRM engine
Results that compound at scale

Trusted by brands that grow beyond rigid ERPs and locked CRM silos

Open Mercato is the high-velocity foundation for your core business operations. We provide the 80% of ERP/CRM infrastructure that is standard, so you can build the 20% that actually gives you a competitive edge. Fast, modular, and AI-native.

Engineering Velocity
Instant Foundation, Zero Debt. Why rebuild auth, multi-tenancy, and base schemas? Open Mercato delivers a production-ready core out of the box. You start at the finish line, not in the trenches of boilerplate code.
Hyper-Personalization
Faster Business Operations. By tailoring the remaining 20% of the system specifically to your unique workflows, we eliminate manual friction. Your team doesn’t adapt to the ERP; the ERP is engineered around your team.
Custom Module Deployment
From business spec to production. While SAP consultants spend months in discovery, Open Mercato uses Spec-Driven Development to turn requirements into functional ERP modules in days.
Platform Independence
ZERO Vendor lock-in or licensing traps. Unlike Salesforce or SAP, you own the engine. Open Mercato is 100% open-source and tech-agnostic, giving you total sovereignty over your data, your processes, and your future.

10 Operational Problems We Solve

Open Mercato provides the 80% of standard infrastructure, allowing you to focus 100% on the 20% of custom, hyper-personalized logic that actually runs your business. No more fighting the framework.

We eliminate the “plumbing.” Open Mercato handles auth, multi-tenancy, and base schemas out of the box. Your team stops being “janitors of code” and starts being architects of value.

We use Spec-Driven AI to turn business requirements into functional modules in days, not months. We bridge the gap between “business intent” and “production code” with 10x the velocity of traditional ERPs.

Gain full Platform Sovereignty. Open Mercato is 100% open-source and tech-agnostic. You own the engine, you own the data, and you decide when and how to scale—zero licensing traps.

Open Mercato is Headless-first and API-native. It acts as the central “Single Source of Truth,” connecting your WMS, CRM, and internal tools through a unified, high-performance data backbone.

Standard ERPs force you to adapt your processes to the software. We do the opposite. We use Open Mercato to build a hyper-personalized cockpit tailored 100% to your unique workflows, accelerating your operations by 3-5x.

Open Mercato is AI-Native by design. Its structured, modular nature makes it the perfect environment for LLMs and Autonomous Agents to navigate. We don’t just “add” AI; we build an ecosystem where AI can actually execute business tasks.

With the “80% Done” philosophy, we skip the boring parts. We can move from a business specification to a functional, production-ready module in as little as 10 days, keeping your business agile in a fast-moving market.

Open Mercato’s modularity allows us to innovate on specific business units (e.g., Pricing, Inventory, CRM) without risking the stability of the entire system. We swap, upgrade, and extend modules independently.

Open Mercato is Tech-Agnostic and Composable. By building on a foundation that follows industry standards and clean architecture, we ensure your system is ready for the next 10-15 years of growth, regardless of how the tech landscape changes.

Our services

Strategic IT Partnership

IT | Elite Support™

Your full-stack, embedded IT department — with the firepower of a software development company.

Start with one issue

• Zero Downtime • Instant Response • Full Responsibility

Software Development

Mobile App

Multi-platform mobile application. UX-driven, easy to use.

E-commerce store

Highly optimized, integrated with marketing tools. Boosts sales.

Web App

Lightweight, fast, easy to edit, future-proof. Website, app, or platform.

ERP/CRM/WMS

We specialize in Odoo and Open Mercato. Optimize processes and boost profits with our experts.

Cloud / DevOps

Zero downtime, full control. We manage your infrastructure and servers — monitoring, patching, and scaling.

Integration

A key to success. Fully integrated apps give you the power to never guess again.

Automation & AI

Automate everything. Cut your operation costs by 50% just by automating 20% of your business processes.

Custom development

If you need custom software, we’re ready and experienced to deliver the highest-quality code.

Estimate Project Get IT Support

Our clients

We orbit around the stars.

What our clients say

  • Dependable Subcontractor

    All work was delivered on time and according to best coding practices. Reliable execution, clean handover, and no missed deadlines.

    Case study →
    Dariusz Tomoń
    CEO / Owner
    ecomplus.pl

  • Marketing Platform That Performs

    Cosmonauts.dev built a custom influencer marketing platform with campaign workflows, approvals, and real-time collaboration. It reduced our coordination time by 60% and significantly improved delivery.

    Case study →
    Grzegorz Miller
    CEO / Owner
    millermedia.pl

  • SEO-Ready Code Delivery

    Cosmonauts.dev delivered a website with perfect technical scores: 99/100 Mobile, 100/100 Desktop. Their development meets the strictest SEO/SXO standards.

    Case study →
    Łukasz Rogala
    SEO/SXO Visioner & Strategist
    verticalseo.io

  • Precise Web Delivery

    Every feature we requested was implemented as expected. The team overdelivered on technical functionality and UI quality.

    Case study →
    Piotr Arent
    CEO & Owner Arent Capital Holding/
    Artimex S.A. / Agro Artim Sp. Z o.o. /
    YPOer
    artimex.pl , artimex.eu

  • Fast Impact on Performance

    Within days, cosmonauts.dev delivered a high-performance server setup that boosted our store’s speed and capacity. Clear, focused execution.

    Case study →
    Piotr Maroszek
    Head of eCommerce at Maro Home
    marohome.pl

  • Odoo Automation That Scales

    Cosmonauts.dev delivered a full Odoo implementation tailored to our business and market. Manual tasks were automated, freeing time for growth. Our brand and sales have scaled up.

    Case study →
    Jakub Drożdż
    Brand & Sales Manager at MOVO Training
    movo.training

  • Reliable Execution Partner

    Cosmonauts.dev delivered our web project on time and as specified. They proved to be a stable digital partner with zero delays.

    Case study →
    Mikołaj Zdunek
    CEO / Owner
    duneko.pl , ladiesgym.pl

  • Consistent Business Growth

    Thanks to the tools built by cosmonauts.dev, we expanded our interior design reach and attracted more customers. Their solution supported our digital growth exactly as planned.

    Case study →
    Aleksandra Wachowicz
    CEO / Owner
    aleksandrawachowicz.pl

  • WooCommerce at Scale

    Cosmonauts.dev handled our large WooCommerce setup with ease. They clearly understand how to build scalable, stable eCommerce infrastructure.

    Case study →
    Mateusz Salamon
    CEO / Owner
    sklep.msalamon.pl

  • 150% Conversion Growth

    Our new store boosted mobile conversions by 150% and cut bounce rate by 63%. The UX is intuitive, especially on mobile – customers flow naturally through the funnel.

    Case study →
    Oskar Chrzanowski
    CEO / Owner
    movo.training

Case Studies

  • [Case Study] Microsoft Dynamics AX Implementation – Mitsubishi & Vestas – Onsite Coordination in Denmark
    Read More

  • [Case Study] ERP G.O.L.D. Retail system implementation for DINO Polska – 1800+ stores, FMCG polish trade chain.
    Read More

  • [Case Study] Kakadu.pl/blog – Frontend Custom Development
    Read More

  • [Case Study] Poczta Polska – UX research for Polish Post on the newly created online mailing portal envelo.pl
    Read More

  • [Case Study] Merlin.pl – ERP Symphony EYC system implementation for one of leading polish e-commerce stores
    Read More

  • [Case Study] Empik.com – Generation Of Automatic Return Of Goods To Suppliers – ERP/WMS
    Read More

  • [Case Study] DUNEKO.pl – Website Implementation based on Figma project created by ROXX Agency. API Integration with Daktela CallCenter CRM.
    Read More

  • [Case Study] Denimou.com – Speed Optimisation
    Read More

  • [Case Study] sklep.msalamon.pl – E-Commerce Store Rework
    Read More

  • [Case Study] Aleksandrawachowicz.pl – Beautiful Website Creation With Interactive Lead Form Resulted In Business Growth
    Read More

  • [Case Study] Kawaprogramisty.pl – Full E-commerce Store Creation / Subscription Store
    Read More

  • [Case Study] movo.training – Rework of E-Commerce store resulted in sales growth
    Read More

  • [Case Study] Konsimo.pl – Business Intelligence Tools Integrated With Magento That Fueled The Sales Funnel And Marketing Optimisation
    Read More

  • [Case Study] Monpresi.com – Full E-Commerce Store Creation That Revolutionised Gifting Services With Super Easy To Use Gift Set Creator.
    Read More

  • [Case Study] LadiesGym.pl – Full Re-Work of corporate website / Increase conversion rate for lead forms / Get PageSpeed Score over 90+ for mobile and 99+ for desktop.
    Read More

  • [Case Study] Artimex.pl and Artimex.eu – 2 integrated websites Implementation based on Adobe XD project.
    Read More

  • [Case Study] AI powered Odoo CRM/ERP implementation for Interior Design Studio. Integration with ChatGPT.
    Read More

  • [Case Study] Marohome.pl – Setting up the server stack for the highest performance and speed of an online store with a large amount of traffic resulted in an immediate increase in sales. PageSpeed result D95/M91.
    Read More

  • [Case Study] Odoo CRM/ERP/WMS implementation for E-Commerce Store – MOVO.TRAINING
    Read More

  • [Case Study] Website Development for SEO/SXO Agency – Vertical SEO
    Read More

  • [Case Study] yerbador.com – Rework of International E-Commerce store
    Read More

  • [Case Study] Enterprise-Grade Influencer Marketing Web App: Custom WordPress & React Solution for Digital Agency Millermedia.pl
    Read More

  • [Case Study] Odoo CRM implementation for DUNEKO PiG
    Read More

  • [Case Study] On-Premise N8N Implementation and Process Automation with Migration from Zapier and Make in the LadiesGym Gym Network
    Read More

  • [Case Study] On-Premise AI Chat Implementation with Local LLM for Enhanced Data Analysis and Managerial Decision Support in the LadiesGym Network
    Read More

  • [Case Study] Custom CMS and React Frontend for Lenovo Gaming + AI Agent – Tailored Platform for a National Campaign
    Read More

  • [Case Study] High-Performance Infrastructure for Rosemi.pl – Dedicated Server with HA Setup & Speed Optimization for E-commerce at Scale
    Read More

  • [Case Study] High-Availability E-commerce Stack for Dunder.store – Dedicated Server Architecture & Performance Tuning at Scale
    Read More

Our TechStack

Future-proof technologies cut costs in long term.

AI Core

Our own AI model

Built into our core workflow to accelerate delivery by 3–5×.

Cosm_v1 AI Model

Frontend

Headless
Architecture

Backend

DevSecOps / Cloud

Mobile Development

iOS & Android

AI / Automation

REST API

Platforms

Ready-made yet highly customisable.

How we work

Simple steps that always work.

Project

1

Discovery

We turn your idea into a roadmap. We gather business needs, define priorities, and shape a clear project scope.

2

Development

We build the solution. You stay in control. Our engineers write clean, scalable code — always synced with you.

3

Testing

We break it before users do. All features are tested by us and verified together with your team.

4

Launch

We go live — with zero surprises. Together we set the launch plan, prepare production, and release.

∞

Ongoing Support

Your system, always up to speed. We maintain, fix, improve — keeping your software secure and evolving.

IT | Elite Support™

1

Onboarding

We align with your business. Goals, systems, expectations.

2

Monitoring

Your system, always under control. 24/7 oversight, instant alerts.

3

Stability

We protect uptime and performance. No surprises, no risks.

4

Acceleration

3x faster task delivery. Thanks to our CosmOS workflows.

5

Growth

Support + development in one plan. Monthly package, flexible scaling.

Estimate Project Get IT Support

Who we are

Gregory Rutecki

CEO & CTO

Schedule Meeting
gregory.rutecki@cosmonauts.dev (PL) +48 602 171 579

You get a full-stack IT department embedded into your company – with the firepower of a software development company. Mid-sized businesses gain enterprise standards without enterprise overhead, while large organizations use us when they need a partner who can move faster than their internal teams. Our model cuts IT costs by up to 50% compared to in-house teams and accelerates time-to-market 3–5×, keeping your systems stable so your business can scale without limits.”

How a Software Dev Company Accelerates Growth? Check.

The problems
you face today

Managing digital projects often feels like a constant battle. Deadlines slip. Communication breaks down. External teams disappear after delivery. Nobody takes real responsibility for results.

Support becomes a painful add-on instead of a natural part of the service. Whether you run a small business, a growing company, or an established enterprise, the problems are the same: chaos instead of clarity, patchwork instead of process, frustration instead of control.

Our answer:
CosmOS Framework

To solve these problems, we built CosmOS — our operational delivery framework.

CosmOS isn’t software — it’s how we run your collaboration. It aligns delivery, support, and growth management into one seamless orbit around your business. With CosmOS, you don’t just get a one-time project — you get an embedded IT partner, driving continuous development, elite support, and real scale.

You focus on growth. We handle the gravity.

How you win
with us

Your projects are delivered with cosmic precision: clearly defined scopes, predictable timelines, proactive communication, and full lifecycle support. You keep full visibility over progress.

You gain a partner who doesn’t disappear after delivery — we stay in your orbit, ready to solve problems before they even appear. Support isn’t an afterthought for us — it’s our DNA.

We take ownership from day one and act as an extension of your team, not just a contractor. That’s why our clients don’t just get projects done — they get stronger, faster, and more resilient.

Ready to take off?
Let’s build your future together.

Estimate Project Get IT Support

Join us


At Cosmonauts.dev, you’ll work with a focused, experienced team that builds high-impact software through clear processes, AI-enhanced workflows, and strong collaboration.

We’re a group of engineers, product experts, and architects who value precision, reliability, and long-term results. Our CosmOS framework supports efficient development by removing friction, keeping every project transparent, well-structured, and aligned with client goals.

We promote autonomy, clarity, and innovation. Whether your strength is backend, frontend, DevOps, or full-stack development, you’ll join professionals who understand why they build software — and who care about doing it right.

If you’re ready to grow with a team that combines technology, process, and purpose —we’d like to meet you.

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