Custom software, web & mobile apps, and AI built around your business.

Mobile and web applications: iOS, Android, and web from a single codebase

Pre-built templates work only as long as your business fits the template. When you need live order tracking, interactive maps, a dedicated courier or field-technician app, custom pricing calculators, or a two-sided marketplace, we build the application around your real workflow.

We use TypeScript, React/Astro, and Capacitor so a single, maintainable codebase powers your fast web app (PWA) alongside native iOS and Android apps in the App Store and Google Play — complete with camera uploads, geolocation, Web Push, Apple Pay, Google Pay, and Stripe. Our own courier marketplace AbiKuller runs on this stack across 245 Estonian towns with real-time bidding and instant payouts.

• Read the AbiKuller marketplace case study →
• Read the AI Marcus SaaS platform case study →

Custom business software: CRM, ERP, dispatch boards & client portals

Many growing companies still run their core operations across ten spreadsheets, email threads, and chat groups — or pay steep monthly per-seat fees for bloated SaaS tools their team barely uses. We build bespoke internal systems that bring orders, crew schedules, inventory, B2B self-service portals, and billing into one fast dashboard.

Your system can automatically issue PDF and e-invoices, generate Montonio or Stripe payment links, reconcile incoming bank statements, and dispatch jobs to field workers via Telegram or mobile app. Custom business software and applications start from €2,990 (price negotiable), run on your own server, and carry zero per-user licensing fees.

Integrating AI into your company’s daily operations

AI delivers measurable ROI when it is connected to your actual company data and internal tools rather than sitting in the corner as a generic chatbot. We connect frontier models (Claude, GPT, Gemini) to your product catalog, pricing logic, booking calendar, and internal documentation using secure retrieval-augmented generation (RAG) and tool calling.

We build two primary categories of business AI: first, 24/7 customer support and sales agents for your website, Telegram, and email that reply in Estonian, English, Russian, and Finnish, calculate preliminary quotes, check order statuses, and hand complex enquiries to your staff with a clean summary (from €990, price negotiable). Second, back-office document and workflow automation that parses incoming PDF invoices, receipts, and contracts into your accounting system and generates ready-to-sign DOCX/PDF quotes and agreements (from €1,290, price negotiable). For example, our legal AI platform Juristabi24 indexes 8,739 Estonian law sections and 648 Supreme Court rulings to draft complete legal filings.

Turnkey SaaS platforms & right-fit stack: Astro, Node.js, TypeScript, WordPress

Launching your own software product or subscription platform? We engineer complete SaaS products from zero: multi-tenant authentication, role permissions, Stripe or Montonio credit and subscription billing, admin telemetry, and multilingual interfaces. Our own AI website builder aimarcus.eu runs in 36 languages and has generated over 1,040 websites for users.

We select the stack to fit the job: modern web apps and marketing sites are built with Astro, React, and TypeScript with Node.js backends and PostgreSQL or SQLite databases. When a team prefers WordPress or WooCommerce for editorial workflows, we build and optimize those to the same performance bar — our WordPress build for Umzugschef.de scored 98 on mobile and 100 on desktop in Google PageSpeed on 18 Oct 2026.

API integrations, Telegram bots, telephony & security

Most manual copy-pasting disappears once your systems talk to each other directly. We integrate Montonio, Maksekeskus, and Stripe payments, Omniva, DPD, and Smartpost parcel logistics, the Estonian e-Business Register, Merit Aktiva, SmartAccounts, and Standard Books accounting, Saloninfra booking, and PBX call recording with AI transcription. Custom API integrations and Telegram bots start from €490, price negotiable.

Every integration includes structured logging, retry queues, and instant error alerts so a temporary third-party outage never drops an order. After launch, we can maintain and evolve your stack under a monthly care plan: Watch from €79/month, Care from €190/month, and Concierge from €490/month, price negotiable.

Handover and 100% code ownership

Your domain, cloud server, Apple and Google developer accounts, Stripe/Montonio merchant accounts, and analytics are registered in your company’s name. All source code lives in a Git repository transferred to you alongside clear documentation covering deployment, backups, and environment keys.

We never lock clients into proprietary agency platforms or charge recurring rent for custom code we wrote for you. Your team — or any developer you hire in the future — can build on the codebase immediately.