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Legacy System Modernization

Modernize the system
not just its coat of paint.

We re-platform, re-architect or replace aging software — preserving years of business logic while removing the technical debt holding your team back. No “rip and replace” surprises, no lost history. Senior architects, fixed scope, a system built to run another decade.

180+ teams shipping with our engineers · ISO 27001-secure · NDA on request

— What we build

Four ways we modernize legacy systems.

From a targeted re-platform to a full system replacement, we choose the modernization path that matches your risk tolerance and timeline — never a rewrite for its own sake. (Building something brand new with no legacy system involved? See our Custom Software Development page.)

Re-platforming

Move the existing application to modern infrastructure — cloud, containers, current runtime — without rewriting the business logic.

Cloud migration

Containerization

Runtime upgrade

Re-architecting

Break apart a monolith into services, or restructure the codebase, while preserving what already works.

Monolith to microservices

Codebase restructuring

Incremental refactor

Full system replacement

When re-platforming won’t cut it — a ground-up replacement built around your actual current process, with a controlled cutover.

Ground-up rebuild

Phased cutover

Parallel run

Legacy data migration

Extract, clean and migrate decades of data out of legacy databases without losing history or breaking relationships.

Data extraction

Schema mapping

Historical data preservation

The business logic in your legacy system is the
valuable part — not the code.

Most failed modernization projects fail because the team rewrote the system without fully understanding the business rules buried in twenty years of code — and lost critical edge cases in the process. Before we touch a single line, we map and document the business logic that actually matters, so the new system does everything the old one did, deliberately.

Map

Monitored by default

Alerting

No silent failures

MAP

Document the business logic that actually matters

PLAN

Choose re-platform, re-architect, or replace

BUILD

Develop and migrate in controlled phases

Outcome

We start with a business-logic audit — so the new system does everything the old one did, deliberately, not by accident.

14 years · 300+ PRODUCTS

Built to last another
decade, not just launch.

300+

Products shipped to production

across 9 industries

14yrs

Years in business

founded 2012

95%

Engagement extension

clients renew or expand

ISO 27001

Audited data security

brief → first standup

Capabilities & stack

Boring tech that
ships on time.

We modernize with proven migration patterns and modern, boring-on-purpose infrastructure — not a risky big-bang rewrite. Real engineering, applied to the system you already depend on.

How we pick

Map business logic before writing code

Before we design anything new, we document what the legacy system actually does — including the edge cases nobody remembers the reason for.

Choose the least risky path that works

Re-platform when the logic is sound but the infrastructure isn’t. Re-architect when the code needs restructuring. Replace only when nothing else will do.

Run old and new in parallel

Wherever possible, the new system runs alongside the old one, validated against real data, before we ever switch over.

Real engineering where it counts

Proper data migration tooling, automated testing against legacy behavior, and phased cutover plans — not a weekend migration and hope.

MODERNIZATION PATTERNS

Strangler fig pattern

Monolith decomposition

Parallel-run validation

APPLICATION & INFRASTRUCTURE

React / TypeScript

Node.js

.NET

Docker

Kubernetes

LEGACY & DATA MIGRATION

Mainframe/COBOL interfacing

SQL Server / Oracle migration

ETL pipelines

CLOUD PLATFORMS

AWS

Azure

GCP

Containerization & orchestration

TESTING & VALIDATION

Automated regression testing

Data reconciliation

Load testing

Industries

Legacy
modernization tuned for your industry.

Every industry has its own legacy footprint, compliance history and business rules baked into old code. We bring playbooks, not blank rewrites — and preserve what matters to your organization from day one.

01 · Industry

Healthcare

Modernizing clinical and admin systems without disrupting care.

02 · Industry

Finance & Fintech

Modernizing core systems under regulatory scrutiny.

03 · Industry

Retail & E-commerce

Modernizing legacy commerce and inventory systems.

04 · Industry

Logistics

Modernizing dispatch and tracking systems that can’t go down.

Engagement models

Pick how you want to
ship with us.

Three ways in — all senior architects, all fixed against the outcome we agree before the first line of legacy code gets touched.

Fixed-scope

Legacy system audit

Best when you know something needs to change but not what approach fits.

Project-based build

Best for a defined system with a clear modernization path.

Embedded

Staff augmentation

Plug senior integration engineers into your team.

FAQ

The questions
everyone asks before kickoff.

Not sure which modernization path fits your system? Book a 30-min call with a senior architect.

What's the difference between re-platforming, re-architecting and replacing a legacy system?

Re-platforming moves the existing application to modern infrastructure without changing the code. Re-architecting restructures the codebase or breaks apart a monolith while keeping the core logic. Replacing builds a new system from the ground up when the old one genuinely can’t be salvaged. We recommend based on an audit, not a default preference.

How do you avoid losing years of business logic that nobody fully understands anymore?

We start with a business-logic mapping phase — documenting what the system actually does, including edge cases — often by combining code analysis with interviews of long-tenured staff who remember why certain rules exist.

Can you modernize our system without taking it offline?

In most cases yes — we use phased migration patterns and run the old and new systems in parallel wherever possible, validating the new system against real data before switching over, so operations aren’t paused for the migration.

Our legacy system runs on a mainframe or an old language nobody uses anymore — can you still work with it?

Yes — we have experience interfacing with and migrating off mainframe/COBOL and other older platforms, extracting both the logic and the data safely.

How do you decide if it's worth modernizing at all versus just living with the old system?

Our legacy system audit gives you a clear picture of the technical debt, risk and cost of staying versus modernizing — so the decision is based on real tradeoffs, not urgency alone.

What happens to our data during the migration — is there a risk of losing history?

We treat legacy data migration as its own careful process — extraction, cleaning, schema mapping and reconciliation — specifically designed to preserve historical records and relationships, not just move the latest snapshot.

How long does a legacy modernization project usually take?

It depends heavily on scope and approach — a re-platform might take 8–12 weeks, while a full replacement with phased cutover can run 16–24 weeks or more. We share a fixed timeline after the audit, not a guess.

Who owns the modernized system, and can our team maintain it afterward?

You own it, fully — source code, infrastructure, and documentation, with no vendor lock-in. We hand over everything your team (or the next vendor) needs to maintain and extend it.

ISO 27001-secure · Certified since 2020

Let's modernize what's holding you back.

Send your brief — a senior architect (not a sales rep) replies within 24 hours with a read on your system’s real risk and complexity, and a fixed-scope plan for the path forward.

What you’ll get