DIGITAL ENGINEERING · HALLE, GERMANY

We build it. We run it. We stand behind it.

Custom software and infrastructure from a senior engineering team that takes full ownership — no handoffs, no layers, no disappearing after launch.

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Full-stack delivery GDPR-ready Multilingual EU-hosted Built-in Monitoring 24/7 operations

WHAT WE BELIEVE

Small teams do extraordinary things when their tools get out of the way. We build those tools.

WHAT WE DO

What We Do

Custom Software Development

Web applications, mobile apps, and backend systems — built from scratch for your exact requirements. Full-stack engineering across every layer, using whatever technology your problem demands.

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Open-Source Platform Deployment

Leading open-source platforms for learning, collaboration, publishing, and communication — deployed, configured, hardened, and operated on your infrastructure.

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Infrastructure & Performance Engineering

Edge architecture, China access acceleration, CI/CD pipelines, observability stacks, and container orchestration for production-grade reliability.

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Managed Operations

24/7 monitoring, incident response, backup, security patching, and capacity planning. Your systems stay running — we make sure of it.

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PROBLEMS WE SOLVE

Problems We Solve

Digital Education

For institutions building video course platforms, student enrollment systems, and multilingual learning environments.

Publishing & Content Protection

For organizations distributing high-value content with device-bound licensing, watermarking, and encryption.

Knowledge & Workplace

For teams that need self-hosted wikis, file collaboration, calendars, and email under their own domain.

China Acceleration

For CDN-hosted products that load too slowly in mainland China.

Operational CRM

For admissions teams and membership organizations that have outgrown spreadsheets.

CASE STUDIES

Selected Work

Digital Education 2025 Custom Software

Bilingual digital publishing platform with enterprise-grade content protection

Challenge

A global educational network needed a platform to sell video courses and eBooks in two languages, with device-bound licensing, dynamic watermarking, and a voucher redemption system — all built on infrastructure they controlled.

Approach

We built a modern web platform with an event-sourced licensing engine that derives entitlements deterministically from immutable records. Encrypted adaptive streaming and device fingerprinting enforce playback limits. Integrated payment processing handles purchases with idempotent webhook fulfillment.

Outcome

The platform is live, serving bilingual content globally with near-instant video playback. Admins manage courses, vouchers, and user access through a single back-office dashboard.

AES-128

Encryption

310+

Global Edge Locations

EN/ZH

Multilingual

Full-Stack Web Event-Driven Licensing Stream Encryption Payment Integration Bilingual Content

This engagement was delivered under NDA. Details anonymized.

Higher Education 2026 Custom Software

Custom admissions CRM for a university serving Chinese-speaking students

Challenge

A university needed a centralized system to track prospective students across multiple engagement channels, replacing fragmented spreadsheets and manual workflows that were losing applicants in the pipeline.

Approach

We designed a type-safe architecture with a modern component-based frontend backed by a lightweight database engine. The prospect-to-enrollment funnel is modeled as a structured pipeline with engagement scoring, multi-channel intake logging, and role-based access controls.

Outcome

The CRM provides admissions staff with unified visibility into the full recruitment pipeline, from initial inquiry through enrollment follow-up. Auto-generated type bindings from the database schema eliminated data model mismatches between frontend and backend.

Multi-channel

Intake

100%

Custom-built

Secured

Data Security

Full-Stack Web Pipeline Architecture Type-Safe Design Role-Based Access

This engagement was delivered under NDA. Details anonymized.

Infrastructure 2025 Performance Engineering

Region-aware reverse proxy that makes CDN-hosted sites fast in mainland China

Challenge

A globally-hosted web application was unusable in mainland China — page loads exceeded five seconds and cached media was inaccessible. Moving infrastructure to China was not an option due to regulatory and cost constraints.

Approach

We built a high-performance reverse proxy deployed on a Hong Kong premium transit node. The proxy detects user geolocation at the request level and rewrites HTML attributes and JSON payloads in-flight to redirect cached assets to the nearest edge. Non-China traffic passes through to the global CDN untouched.

Outcome

China page load times dropped from over five seconds to under two. The lightweight containerized proxy handles streaming HTML rewriting at 27ms p99 latency. Hot-reloadable geolocation databases update with zero downtime.

3×

Latency Reduction

27ms

Rewrite Latency

98%

Cache Hit Rate

Edge Computing Reverse Proxy Geolocation Routing HTML Rewriting Premium Transit

This engagement was delivered under NDA. Details anonymized.

Cloud Architecture Edge Computing Stream Encryption API Design Container Orchestration Database Engineering Geolocation Routing CI/CD Automation Observability Payment Integration Identity & Access Performance Engineering Mobile Development Full-Stack Web China Acceleration Managed Operations

HOW WE WORK

Our Process

Discovery

We listen, map your workflows, and identify what the system must do — and what it must never break.

Architecture

We choose the right stack, design the data model, and plan integrations — all before implementation begins.

Planning

We break the work into milestones with clear deliverables, timelines, and checkpoints you can track.

Build

We develop iteratively, shipping working increments so you see progress — not just promises.

Quality Assurance

We test across environments, audit for security, and verify performance before anything goes live.

Operate

We monitor, maintain, and evolve the system so it keeps working long after launch day.

WHY US

Why Kros

Senior-only delivery

Every project is led and built by experienced engineers. No handoff to junior staff, no outsourced layers, no bait-and-switch.

Full ownership from idea to ops

We stay with your system from the first conversation through production operations. One team, one relationship, total accountability.

We still pick up the phone at 2 AM

When your system has a problem, we respond. Not a ticket queue — an engineer who knows your stack and your story.

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