Custom software development

Custom systems
that scale your business

Custom web apps, mobile apps, SaaS platforms, Web3.
From MVP to enterprise — no lock-in, with full source code.

Let's talk about your project →View pricing

4-8 wks

MVP to production

100%

code ownership

24/7

monitoring

4 types

of systems

4 types of systems we build

From simple integrations to comprehensive SaaS platforms — every project starts with a conversation.

🌐

SaaS web apps

B2B and B2C platforms: CRM, ERP, booking systems, education platforms, marketplaces. Multi-tenant, scalable to millions of users.

CRM for an agencyOnline course platformServices marketplaceSaaS booking system

📱

Mobile apps

iOS and Android in one codebase. React Native with Expo. Native performance, cross-platform cost. App Store and Google Play publishing included.

Courier appBusiness management appLoyalty appCommunity social app

🔗

Web3 & Blockchain

Smart contracts on Solana and Ethereum. NFT marketplaces, DeFi protocols, asset tokenization. Security audit included.

NFT marketplaceSPL token on SolanaDeFi protocolDAO governance

🔌

API integrations

We connect systems that normally do not talk to each other. CRM + ERP + e-commerce + payments — one coherent data flow.

Comarch ERP integrationAllegro/Amazon syncHubSpot connectorE-commerce invoice automation

How we build systems

Agile development with visibility at every stage — no surprises.

Week 1

Discovery workshop

We map business requirements, user stories, MVP scope. We define must-have vs nice-to-have.

Week 1-2

Architecture

System design: database, API, modules, integrations. Technology decisions. ADR documentation.

Weeks 3-8

MVP development

Iterative development in 2-week sprints. Demo every sprint — you see progress live.

Weeks 7-9

Testing & QA

Unit, integration, e2e tests. Load testing. Security. Code review of every module.

Week 9+

Deploy & growth

CI/CD pipeline, monitoring, user onboarding. Tech support and further development.

Corporate agency vs us

Why small, focused studios beat large agencies.

Parameter

Corporate agency

stronadlafirm.com

Delivery time

Corporate agency: 6-18 mo.

Us: MVP 4-8 weeks

Communication

Project manager + account manager

Directly with the developer

Technology

Old stack, legacy code

Next.js 15, React 19, TypeScript

Scalability

Monoliths, growth issues

Cloud-native, auto-scaling

Maintenance cost

~2,000-5,000 PLN/mo.

~0-500 PLN/mo. (Vercel)

Code ownership

Sometimes lock-in to their infra

100% yours, full source code

Web apps & SaaS

Custom quotes — listed prices are the minimum. Free consultation before you decide.

MVP

fromPLN 34,900 (~$8,750)

+ PLN 1,499 (~$370)/mo. — monthly (infra + monitoring + 8h of edits)

✓1 core workflow (e.g. CRM for insurance agents)
✓Auth (email/password + Google OAuth)
✓Dashboard + 3–5 data views
✓Postgres database (Supabase / Neon)
✓REST API + documentation
✓Vercel deployment + Sentry monitoring
✓Basic subscription billing (Stripe Checkout)
✓Onboarding flow + transactional email
✓Full GitHub repo + IP transfer

Delivery: 6–10 weeks

Order MVP

SaaS MVP

fromPLN 79,900 (~$20,000)

+ PLN 2,999 (~$750)/mo. — monthly (infra + monitoring + 16h of edits)

✓Multi-tenancy (orgs + roles)
✓RBAC (admin, manager, user, custom)
✓Subscription billing (Stripe Billing — trial, upgrade, dunning)
✓Admin panel with analytics (revenue, churn, MRR, LTV)
✓Public API (REST + GraphQL) + documentation
✓5–10 integrations (Slack, Zapier, webhooks, OAuth providers)
✓Audit log + GDPR compliance (data export, deletion)
✓CI/CD + per-PR preview deployments
✓Multi-step onboarding + product tour
✓Full GitHub repo + IP transfer + 60 days of revisions

Delivery: 12–16 weeks

Order SaaS MVP

Enterprise

custom quotePLN 0

+ PLN 4,999 (~$1,250)/mo. — monthly (infra + SLA + dedicated team)

✓DDD + microservices architecture (where it makes sense)
✓Multi-region deployment (EU + US + APAC)
✓SSO (Okta / Azure AD / Google Workspace)
✓SOC 2 Type II + ISO 27001 audit pack
✓Performance: 1,000+ RPS without sweating, autoscaling
✓Dedicated team: 2 fullstack + 1 ML + 1 DevOps + PM
✓Weekly sprint review + quarterly roadmap
✓99.99% SLA + 30-min critical-incident response
✓24/7 on-call + public status page
✓Compliance: GDPR + AI Act + sector (KNF, EBA, HIPAA)

Delivery: 16–24 weeks

Book discovery

Full apps & systems pricing →

More services

📱 Mobile apps

React Native + Expo. iOS and Android simultaneously. Published to App Store and Google Play.

MVPfrom PLN 14,999 (~$3,750)

STANDARDfrom PLN 34,999 (~$8,750)

ZAAWANSOWANAfrom PLN 79,999 (~$20,000)

Details →

🔗 Web3 & Smart Contracts

Solana (Anchor), Ethereum (Solidity). Smart contracts, NFT, DeFi, tokens.

TOKEN SPL (SOLANA)PLN 4,999 (~$1,250)

TOKEN ERC-20PLN 7,999 (~$2,000)

NFT CONTRACTPLN 9,999 (~$2,500)

Details →

🔌 API & Integrations

REST, GraphQL, Webhooks. We connect your systems into one data flow.

PROSTA INTEGRACJAfrom PLN 2,999 (~$750)

CRM (HUBSPOT/PIPEDRIVE)from PLN 4,999 (~$1,250)

CUSTOM REST APIfrom PLN 7,999 (~$2,000)

Details →

Technology stack

Modern, proven, scalable. No outdated tech.

Next.js 15

React framework

React Native

Mobile iOS/Android

TypeScript

Strict typing

PostgreSQL

Relational DB

Supabase

BaaS + Auth + Storage

Redis

Cache + queues

Vercel

Edge deployment

Stripe

Payments

Claude AI

AI integration

Anchor/Solana

Web3 programs

Docker

Containerization

GitHub Actions

CI/CD pipelines

Frequently asked questions

How much does a mobile app cost?+

Mobile MVP from 14,900 PLN (5-8 screens, React Native, iOS+Android). Standard 34,900 PLN, advanced 79,900 PLN — depending on feature scope, integrations, and store publishing.

Do you build SaaS systems?+

Yes. Web MVP from 34,900 PLN + 1,499 PLN/mo. (3-month fixed-scope, dashboard + auth + payments). Production-ready SaaS from 79,900 PLN + 2,999 PLN/mo. Enterprise — custom quote after discovery workshop (4,999 PLN).

What tech stack do you use?+

Next.js 15, React 19, React Native (Expo), Node.js, PostgreSQL, Supabase, Vercel, Redis. For Web3: Solana (Anchor), Ethereum (Solidity, Foundry).

Can you integrate with my existing system?+

Of course. We integrate with CRM (HubSpot, Pipedrive, Salesforce), ERP (Comarch, SAP, Enova), e-commerce (Allegro, Amazon, Shopify), payments and any REST/GraphQL API.

How long does it take to build an app?+

Web MVP: 4-8 weeks. Mobile MVP: 6-10 weeks. Full SaaS app: 8-16 weeks. Enterprise: 6-12 months. We work in 2-week sprints with a demo after each.

Do I have code access during the project?+

Yes — a GitHub repository with your access from day one. You see every commit, every PR. Full transparency throughout.

What happens after the project ends?+

Technical documentation, training, further-development plan. Optional tech support from 2,499 PLN/mo. or you host it yourself — full freedom.

Ładowanie…

Custom systemsthat scale your business

4 types of systems we build

SaaS web apps

Mobile apps

Web3 & Blockchain

API integrations

How we build systems

Discovery workshop

Architecture

MVP development

Testing & QA

Deploy & growth

Corporate agency vs us

Web apps & SaaS

MVP

SaaS MVP

Enterprise

More services

📱 Mobile apps

🔗 Web3 & Smart Contracts

🔌 API & Integrations

Technology stack

Next.js 15

React Native

TypeScript

PostgreSQL

Supabase

Redis

Vercel

Stripe

Claude AI

Anchor/Solana

Docker

GitHub Actions

Frequently asked questions

Custom systemsthat scale your business

4 types of systems we build

SaaS web apps

Mobile apps

Web3 & Blockchain

API integrations

How we build systems

Discovery workshop

Architecture

MVP development

Testing & QA

Deploy & growth

Corporate agency vs us

Web apps & SaaS

MVP

SaaS MVP

Enterprise

More services

📱 Mobile apps

🔗 Web3 & Smart Contracts

🔌 API & Integrations

Technology stack

Next.js 15

React Native

TypeScript

PostgreSQL

Supabase

Redis

Vercel

Stripe

Claude AI

Anchor/Solana

Docker

GitHub Actions

Frequently asked questions

Custom systems
that scale your business

Custom systems
that scale your business