Websites, online stores, custom development and support. VAT invoice, code in your repository, no hidden setup fees. Concrete rates — refined after a short brief.
Full implementations from brief to live. VAT invoice, code in your repository.
Bespoke code for specific business needs. Magento, WordPress, Python/FastAPI, .NET.
Subscription models — predictable costs, no lock-in contract. Magento stores get a separate care offer with a written SLA, from 990 PLN/mo.
"From X" is the price of the base scope described in the package — that scope costs exactly that. If the scope grows after the brief, the quote grows with it and is fixed before kick-off: no hidden line items, no mid-project surcharges. VAT invoice; subscriptions carry no setup fees.
Brief by email or a 15-minute call. Quote in 2 business days. Once accepted, 50% deposit, the rest after launch. Custom dev code lands in your repository (GitLab/Bitbucket/GitHub/self-hosted git — your call). No vendor lock-in.
SISL is a studio of freelancers — we run lean teams of 2-4 specialists per project, picked for the stack you need (Magento, WP, FastAPI, .NET). We deliver projects up to ~6-10 weeks; bigger ones we split into phases. If you're shopping for a 50-person corporate team with a rigid SLA, we're the wrong fit. If you want a specific thing built fast without corporate overhead, we're a good match.
Open-ended agreement with a 30-day notice — email [email protected]. The subscription runs through the paid month, no cancellation penalty. After termination your data (products, customers, orders) stays in your Magento and Optima — we never pull it out.
The portfolio page has full case studies: E-FakturaPRO (KSeF), SISL Optima Connector, WooCommerce Lumina, Battle Map (real-time data viz). Each with stack, time, and the actual business outcome.
Brief by email or a 15-minute call. Quote in 2 business days, no commitment.