Legacy software modernization
Modernise the systems your business depends on, step by step, without stopping operations.
Get expert adviceTransform core legacy systems to improve performance, agility and user experience.
Legacy systems hold years of business rules, which is why replacing them in one go is so risky. We map what the system really does, then modernise it piece by piece: wrapping it with APIs, moving modules to new services and retiring the old code as we go.
Each step ships to production and pays for itself, with tests that prove behaviour is preserved, so the business keeps running while the platform improves.
Ideal for: Enterprises with ageing core systems, Teams slowed by technical debt, Companies moving to the cloud.
What we do
What our legacy software modernization covers
Legacy system and code assessment
Modernisation roadmap with business priorities
API layer and incremental re-engineering
Data migration and decommissioning plan
Customer feedback
“They took a rough brief and turned it into a platform our whole organisation runs on. Delivered on time, every time. That is rarer than it should be.”
ZafarCEO, IDDAS1 of 4Service benefits
What you can achieve with DevXe Labs’ legacy software modernization
Launch faster with AI-assisted delivery
AI speeds up research, coding, testing and documentation, while senior engineers review every change, so you reach production sooner without cutting corners.
Lower delivery risk
Threat modelling, automated tests and code review are part of every engagement, so problems surface early instead of in production.
Senior engineers from day one
The people who scope your project build it. You work directly with experienced engineers, not a junior team learning on your budget.
Full visibility into progress
Regular demos, shared boards and clear reporting show what was delivered, what is next and where the risks are.
Flexible engagement that grows with you
Start with a focused project, then scale the team up or down as your roadmap changes.
Outcome-oriented cooperation
Flexible cooperation models tailored to your needs
Every engagement is built around a model that fits your scope, budget and appetite for change, with clear accountability for delivery and quality.
Fixed price
Best for well-defined scopes. We agree milestones, deliverables and budget upfront, and you pay for outcomes.
Milestone-based paymentsAgreed scopeTime and materials
Best for evolving products. You get flexibility to change priorities as you learn, with transparent reporting on every hour.
Flexible scopeWeekly reportingDedicated team
A long-term team that works as part of your organisation, in your tools and rituals, sized to your roadmap.
Scales with youSenior engineersHow we apply AI to the SDLC
We use AI tools at every stage of delivery to move faster, with senior engineers reviewing every output and your data kept out of public models.
Discovery & requirements
Summarise research, draft user stories and spot gaps in requirements.
- Claude
- ChatGPT
Design
Explore flows and generate interface variations to test with users.
- Figma AI
- Claude
Engineering
Generate boilerplate, refactor safely and explain unfamiliar code.
- GitHub Copilot
- Cursor
Testing
Write test cases, generate test data and widen coverage.
- Copilot
- Playwright
Deployment
Review infrastructure changes and release notes before they ship.
- Claude
- GitHub Actions
Support
Triage incidents, analyse logs and draft fixes faster.
- Claude
- Sentry
Case studies
Our legacy software modernization successes
Care Giver: one platform for a caregiving team’s whole dayRead case study 
Leo: making centuries-old handwriting readableRead case study 
Aetheris: a professional trading desk for retail quants3 core trading surfacesRead case study 
VerseCraft: a writing studio with real English and Urdu support2 first-class writing languagesRead case study How we work
Key steps in our legacy software modernization process
Agree goals, users and success metrics, and map the riskiest unknowns before writing code.
Industry-specific use cases for legacy software modernization
Fintech
We build trading, payments and digital-asset platforms where every number reconciles and every action leaves an audit trail.
- Payments platformsSecure payment flows, ledgers and reconciliation built for trust, with idempotent APIs and double-entry records behind every transfer.
- Trading systemsLow-latency market data, order management and analytics that give traders a professional desk on web and mobile.
- Open banking & integrationsConnect banks, payment providers and accounting tools through secure APIs, with every call logged and reconciled.
- Risk & fraud analyticsModels that flag anomalies early and explain why, so your analysts act on signals instead of noise.
- Security & complianceThreat modelling, hardening and the audit evidence that enterprise partners and regulators ask for.
Technologies
Tools and technologies that we use
Our engineers work with proven, well-supported technologies and pick the stack that fits your product, team and budget.
Why DevXe Labs
Why partner with DevXe Labs for legacy software modernization
- 01Senior engineers on every project
The people who scope your project build it. No hand-off to a junior team after the sale, and no learning on your budget.
- 02AI built into how we deliver
We use AI across discovery, design, coding and testing, with senior engineers reviewing every change, so you get speed without cutting corners.
- 03Security and quality by default
Threat modelling, automated tests and code review are part of every engagement, so the software you launch is the software that passes due diligence.