---
title: "Legacy Modernization & Performance | Axio Intelligence"
description: "Performance engineering and legacy modernization: profiling, database and API tuning, cloud migration and rewrites without a feature freeze."
url: https://axiointelligence.com/services/legacy-modernization/
---

# Performance & legacy modernization

Axio Intelligence makes slow or aging systems fast and maintainable again — profiling and fixing performance bottlenecks, tuning databases and APIs, migrating platforms, and rewriting legacy components incrementally behind stable interfaces so the business never has to stop shipping.

[Scope your project](https://axiointelligence.com/book/) 

## You probably need this if…

- Pages, APIs or reports got slow as data grew, and nobody owns performance.

- A legacy system blocks new features and only one person understands it.

- You need to migrate clouds or off a platform without a customer-facing outage.

## What you get

### Performance profiling

Measure first: tracing, query analysis and load tests against realistic data.

### Targeted fixes

Indexing, caching, query rewrites, async processing and right-sized infrastructure.

### Incremental rewrites

Strangler-pattern replacement, one bounded component at a time, with parity tests.

### Migrations

Cloud-to-cloud and platform exits run as small, reversible steps.

## What we work in

Rust, Go, Elixir / Phoenix, Postgres, Ruby on Rails, Node.js, Python, Kafka, ClickHouse, OpenTelemetry

Named platforms and standards describe what we build with and build to; they don’t imply a formal partnership or certification with the vendor.

Typical engagement

**Shape:** Performance audit, then fixed-scope phases

**Timeline:** Audit: 1–2 weeks · Phases: 4–12 weeks each

**Pricing:** Fixed fee, quoted after scoping

**IP:** You own the code and designs

[Book a scoping call](https://axiointelligence.com/book/)

## Industries

### Industrial & remote assets

Monitoring and control for oil & gas, water, cold chain and infrastructure.

[Industrial & remote assets](https://axiointelligence.com/industries/industrial-remote-assets/)

### Manufacturing & distribution

Manufacturers, distributors and retailers moving off IBM mainframes, IBM i, Oracle and SQL Server.

[Manufacturing & distribution](https://axiointelligence.com/industries/manufacturing-distribution/)

### Energy & DER devices

Make batteries, solar + storage and EV chargers dispatchable.

[Energy & DER devices](https://axiointelligence.com/industries/energy-der/)

### Connectivity providers & IoT platforms

Implementation partner for MVNOs, module makers and IoT platforms.

[Connectivity providers & IoT platforms](https://axiointelligence.com/industries/iot-connectivity-providers/)

## Performance & legacy modernization: common questions

### Do we have to freeze features during a rewrite?

No. We replace components incrementally behind stable interfaces, with parity tests, so product work continues while the old system is retired piece by piece.

### Do you modernize COBOL or RPG on IBM mainframes and IBM i?

Yes, one job at a time. We move COBOL and RPG workloads off z/OS and IBM i to AWS, Azure or Google Cloud in a modern language, starting with the batch and extract jobs that cost the most, and dual-run them until the outputs match. See mainframe & IBM i migration.

### Do you migrate Oracle or SQL Server to PostgreSQL?

Yes. We convert schemas and stored procedures, keep data in sync with change data capture, and cut over with a rollback path. See database migration.

Further reading

- [Migrating clouds without the migration freeze](https://axiointelligence.com/blog/migration_without_downtime/)
- [On an IBM mainframe or IBM i? Mainframe & IBM i migration](https://axiointelligence.com/services/mainframe-migration/)
- [Leaving Oracle or SQL Server? Database migration](https://axiointelligence.com/services/database-migration/)

## Often paired with

### New product line platforms

The full platform for a new division: portals, commerce, billing, integrations.

[New product line platforms](https://axiointelligence.com/services/product-platforms/)

### Data & AI platforms

Data pipelines, labeling workflows and project tooling that feed AI models.

[Data & AI platforms](https://axiointelligence.com/services/data-ai-platforms/)

### Database migration

Oracle and SQL Server to PostgreSQL or MySQL — off the license bill.

[Database migration](https://axiointelligence.com/services/database-migration/)