Legacy Transformation

You're not running a legacy system. The legacy system
is running you.

Every workaround your team built last year is a weight your team carries this year. REKIT removes the weight — and replaces it with infrastructure that compounds.

Let's diagnose your stack See the protocol ↓
Trading floor mid-rebuild — legacy operating reality under structural debt
Architectural blueprint rising into operating reality

The Real Cost

The real cost isn't the system. It's everything the system blocks.

Your engineers are not slow. They are stuck — fielding requests the architecture was never designed to handle, patching logic that was never meant to scale, explaining to stakeholders why 'it's more complicated than it looks.' Meanwhile, every new AI capability your competitors deploy is built on clean infrastructure. Theirs adapts. Yours resists. This is not a tooling problem. This is a structural one.

The structural shift

From the stack you have to the stack you should be running.

Data silos & batch processing
Unified lakehouse & streaming
Hardcoded business logic
Composable services
Reactive firefighting
Predictive telemetry
Legacy code & spaghetti codebase
Modern code architecture

How we rebuild

From the stack you have to the stack you should be running.

We do not 'lift and shift.' We perform calculated extractions, replacing rigid monoliths with composable, event-driven services.

Before01

Data silos & batch processing

Data is partitioned across disparate databases requiring manual, overnight ETL scripts that break frequently.

Three isolated server towers with severed cables — data silos
Fragmented · Manual
With Rekit→ 01

Unified lakehouse & streaming

Real-time event streaming feeds a unified analytical layer — fully BI-ready and AI-ready from day one.

Unified obsidian basin with copper liquid and converging light streams — lakehouse confluence
Realtime · Governed
Before02

Hardcoded business logic

Rules are buried inside a monolith. Changing a single rate requires a full engineering cycle and a release.

Obsidian monolith chained shut — hardcoded logic
Locked · Slow
With Rekit→ 02

Composable services

Decoupled functions behind an API gateway. Business teams can configure logic without engineering bottlenecks.

Central brushed-steel API hub with four orbiting satellite cubes connected by copper light threads — composable services
Composable · Configurable
Before03

Reactive firefighting

Servers run out of memory at random. Monitoring consists of users telling you the system is down.

Cracked analog gauge with red warning glow — reactive firefighting
Reactive · Manual
With Rekit→ 03

Predictive telemetry

Infrastructure-as-code auto-scales on demand. Distributed tracing surfaces anomalies before they become incidents.

Smooth holographic wave with copper forecast cone — predictive telemetry
Predictive · Self-healing
Before04

Legacy code & spaghetti codebase

Grown over decades, documented only inside senior devs' heads. One change breaks three other places.

Precarious chained tower of obsidian codex slabs — legacy debt
Brittle · Undocumented
With Rekit→ 04

Modern code architecture

Clean layers, tested modules, documented contracts. Every new dev ships from week one.

Three perfectly stacked floating slabs with copper light seams — layered architecture
Layered · Tested · Owned

Our Process

How REKIT transforms a legacy stack

No 'big bang' migration. No six-month silence. Parallel build, controlled cutover.

Phase 012 weeks · Output: Architecture assessmentAudit & Map

Audit & Map

We spend two weeks inside your system. Not to judge it — to understand its logic, its debt, and its actual potential. You get a clear picture of what's holding you back and what's worth keeping.

  • Topology architecture graph
  • Decoupling roadmap
Phase 026–10 weeks · Output: Production systemArchitect & Replace

Architect & Replace

We design the replacement layer: modular, AI-native, and built to evolve. No 'big bang' migration. No six-month silence. Parallel build, controlled cutover.

  • Composable API gateway
  • Zero-downtime cutover
Phase 0390 days · Output: Full ownershipHand Over & Compound

Hand Over & Compound

You own the new system entirely. We document it, train your team on it, and stay available for the first 90 days. After that, it runs — and improves — without us.

  • Automated CI/CD pipelines
  • Full legacy deprecation

Qualification protocol

We do not consult. We embed.

We strictly limit our engagements to structurally critical implementations where the cost of doing nothing exceeds the cost of transformation.

Mid-market core
Technical leadership
Critical juncture

Every legacy system is a story of decisions that made sense at the time. Our job is to understand that history before we systematically replace it.

REKIT

REKIT transformation philosophy

You already know the system needs to change. The only question is when.

No commitment. No pitch deck. A real conversation about your specific stack.

Book your 45-minute architecture diagnostic

Next Step

René Pfisterer, Gründer Rekit