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Software studio · Working worldwide

Senior engineering.
AI-native delivery.

A team of specialists who design, build, test and ship complete products: architecture, backend, web, native iOS and Android, cross-platform, design and QA. We use AI at every step of the work, and we build AI products for others.

Book a callhello@kroxgroup.dev

13+ years · fintech · betting · e-commerce · energy · geospatial · logistics · AI

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years of engineering
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industries shipped in
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platforms: web, iOS, Android, cross-platform
2023
AI-native since

Services

Every discipline a product needs, under one roof.

No sub-contracting, no hand-offs between agencies. The same team that designs the architecture ships the app store build.

Architecture & system design

Event-driven microservices, modular monoliths, multi-tenant platforms. We decide how the system is shaped before the first line is written.

  • Microservices
  • Kafka
  • Multi-tenant
  • Event-driven

Backend engineering

Java and Spring at the core, Node and Python where they fit. APIs, messaging, payments, real-time and batch.

  • Java
  • Spring Boot
  • Node.js
  • PostgreSQL
  • Kafka

Web frontend

Fast, accessible interfaces in React and Next.js, from marketing sites to complex real-time dashboards.

  • React
  • Next.js
  • TypeScript
  • Tailwind

Native iOS & Android

Swift and SwiftUI, Kotlin and Jetpack Compose. In-app purchases, push, Bluetooth, store publishing.

  • Swift
  • SwiftUI
  • Kotlin
  • Compose
  • StoreKit

Cross-platform mobile

One codebase where it makes sense: React Native or Capacitor, with native modules where it does not.

  • React Native
  • Capacitor
  • Expo

Product & UI/UX design

Design systems, flows and interfaces that engineers can actually build, made alongside the engineering.

  • Design systems
  • Prototyping
  • Figma

QA & test automation

Unit, integration, contract and end-to-end suites that run on every commit. Mobile UI flows included.

  • Playwright
  • Maestro
  • Testcontainers
  • JUnit

Cloud & DevOps

AWS, Kubernetes, GitOps and observability. Infrastructure that scales on demand and tells you when something is wrong.

  • AWS
  • Kubernetes
  • Argo CD
  • Grafana

AI

AI is how we work. AI is also what we build.

01 · How we work

AI-native engineering, senior-owned

Every engineer directs AI agents for the parts that are well understood, and spends their own time on the parts that are not: architecture, edge cases, security, review. Senior-quality work in a fraction of the usual timeline.

  • Senior review on every line, whether an agent or a person wrote it
  • Weeks to a first working version, not months
  • Tests, docs and infrastructure generated alongside the code
  • Architecture, edge cases and security stay human-owned
$ agent run --task "add refund flow" --review senior
✓ 14 files changed · 38 tests added · reviewed by architect

02 · What we build

Custom AI products and integrations

Not just development with AI: we ship LLM-powered products, agents and integrations inside your existing systems, with the guardrails production needs.

  • LLM applications and assistants: chat, rewriting, extraction, translation
  • Agents that act: workflows, tool use, MCP servers
  • RAG over your documents and data
  • Multi-provider integration: OpenAI, Anthropic, Gemini, open models
  • Structured outputs, guardrails, prompt-injection hardening
  • Content moderation and classification
  • OpenAI
  • Anthropic
  • Gemini
  • Open models
  • MCP
  • RAG
  • Vector DBs

Process

Six steps, no surprises.

  1. 01

    Discover

    Goals, constraints, users. We ask until the problem is clear.

  2. 02

    Architect

    System shape, data, boundaries, risks. Written down before we build.

  3. 03

    Build

    Senior engineers directing AI agents. Working software every week.

  4. 04

    Verify

    Automated tests on every commit, QA on every release.

  5. 05

    Ship

    Production, app stores, monitoring. You see it live.

  6. 06

    Evolve

    Measure, iterate, scale. We stay as long as you need us.

Industries we have shipped in

  • Fintech
  • Sports betting
  • E-commerce
  • Energy
  • Geospatial & IoT
  • Logistics
  • Ticketing & payments
  • Marketplaces
  • Social platforms
  • Mobile gaming
  • AI products

Ways to work together

Pick the shape that fits.

01

End-to-end product

From idea to app stores and production. One team owns architecture, code, design, tests and infrastructure.

Talk to us

02

Dedicated team

Senior engineers embedded in your process, your tools and your sprints. Scale up or down month to month.

Talk to us

03

Architecture consulting & audit

A second opinion before a big decision. Reviews, migration plans, performance and cost analysis.

Talk to us

Principles

What you can hold us to.

Contact

Tell us what you are building.

A 30-minute call, no sales script. You describe the product, we tell you honestly how we would build it, how long it would take and what it would cost.

hello@kroxgroup.dev

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