Legacy Software Modernization Services
Legacy software modernization services for the codebase your team has outgrown. We re-engineer it into code your engineers can own and extend. The price gets fixed once the audit maps the full scope.
Audit defines fixed scope
Your team owns the result
Rollback path stays live
LEGACY SOFTWARE MODERNIZATION SERVICES WE PROVIDE
Legacy System Audit
We trace the codebase, the data model, and the integration points before any code changes happen. You get a rebuild plan grounded in what the system does in practice, apart from any old documentation.
Application Re-Engineering
Application re-engineering covers each module in turn, rewriting onto a current runtime. Characterization tests hold the new code to the legacy system's exact behavior until your engineers take over.
Monolith-to-Microservices Refactoring
Services get exposed through an API gateway one at a time, following the strangler fig pattern across the migration. The result is a codebase of independently deployable units your team controls.
Cloud Migration Engineering
Workloads move onto cloud infrastructure configured for autoscaling and monitoring. Cloud migration for legacy systems reduces the operational overhead your engineers would otherwise carry manually.
Database & Data-Layer Modernization
The data model separates from the application logic built around it over the years. Double-write keeps both databases in sync, and integrity checks compare them before reads switch over at cutover.
API & Integration Modernization
We replace point-to-point connections with REST or GraphQL endpoints partners and internal tools can use directly. A new integration that once took several months now fits into a regular delivery cycle.
UI / UX Modernization Development
Interfaces get rebuilt on a current frontend framework. Your team keeps the underlying workflows familiar to the people using them daily, which keeps training overhead low through the transition.
Security & Compliance Hardening
We map SOC 2, HIPAA, or PCI-DSS controls onto the target architecture as the rebuild proceeds, closing gaps that would need a partial legacy rewrite. Your auditors keep the final say on certification.
Post-Modernization Support
Once the system is live, SapientPro stays available for new features and the modernization work that comes next. Your developers receive full documentation, keeping them in control of the system.
GET A SCOPE AND A START DATE
Send over the codebase and a short list of integrations to start the legacy software modernization services audit. What follows is a detailed scope with fixed milestones and a firm price, before any development starts.
WHEN YOUR STACK NEEDS RE-ENGINEERING
01
Hiring for Your Stack Has Dried Up
The talent pool that supported your codebase a decade ago has thinned out, and that's only half the problem. The senior engineers still on the market actively avoid outdated framework versions on their CV, so each hire takes months to close and the salary band keeps moving up.
02
Every Integration Costs Three Months
A new partner, payment provider, or analytics tool should connect within a sprint. Legacy code that speaks neither REST nor GraphQL turns each connection into its own custom build, repeating the plumbing and pushing features down the backlog.
03
Your AI Roadmap Hits the Data Layer
RAG pipelines, agents, and analytics need a data model they can query directly and reliably. A schema fused inside a legacy monolith stalls every AI initiative at the same point, weeks spent untangling data access before any model gets trained.
04
The System Outgrew Its Last Owner
Legacy codebases that arrive through an acquisition, or survive a founding engineer's departure, carry decisions nobody documented or logic nobody can explain. Each change becomes an experiment, the people who knew the intent left years before.
05
Compliance Moved Under Your Feet
SOC 2, HIPAA, PCI-DSS, and GDPR keep tightening, and architectures that predate strict enforcement of these controls tend to fall short of what auditors now expect. Bolting them onto the legacy system creates new gaps, a rewrite closes them.
06
A Rewrite Started and Stalled
An internal team began migrating to a new stack. Priorities shifted, engineers moved on, and the scope grew well past what anyone had budgeted. Half the system runs on legacy code, half on new, and velocity has dropped below where it started.
WHO WE MODERNIZE LEGACY SOFTWARE FOR
Product CTOs
A CTO whose product roadmap keeps colliding with a legacy codebase, one built before AI features, modern integration protocols, and compliance requirements found their way onto every planning cycle.
SaaS Founders
The original team is gone, the legacy codebase has aged past its support window, and customers keep asking for features that strain an architecture already running close to its limit on every front.
Retail Operators
Custom e-commerce or operations platforms paired with ageing ERP systems, where every partner integration becomes its own project instead of a routine configuration change.
Fintech and Health
A CTO in a regulated industry whose legacy system was built before the current SOC 2, HIPAA, PCI-DSS, or GDPR bar, leaving the architecture short of what auditors and regulators now require from it.
HOW WE MODERNIZE YOUR LEGACY SOFTWARE
Six steps, each with a defined output your team can verify. The audit sets the scope, characterization tests hold the rewrite to the legacy system's behavior, and incremental cutover keeps production live until the last module moves.
LEGACY MODERNIZATION CASES
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Sprinkle
How Sprinkle Cut Costs by 50% and Expanded User Base by 75,000 Through Strategic Optimization
We migrated Thailand's largest water delivery CRM to a custom solution, automating the call center and optimizing order management.
Footshop
Footshop Webstore Overhaul Case Study
SapientPro rebuilt Footshop’s store, added multi-currency payments, and deployed AWS multi-region hosting to keep the site fast across Europe.
From MVP to Powerful GPS Tracking Platform
GPS Platform Upgrade with 30% Subscription Growth
We helped MasTrack rebuild its tracking platform, added real-time features, and automated billing, leading to faster user handling and 30% subscription growth.
Piktochart
Frontend and Animation Work for Piktochart Website
We supported Piktochart with custom marketing pages, advanced animations, and performance-optimized frontend development to elevate their visual content platform.
TECH STACK
ChatGPT
A conversational AI developed by OpenAI that specializes in generating human-like responses, facilitating engaging and contextually relevant dialogues.
Llama
A modern language model known for its ability to understand and generate human-like text, enhancing natural language processing applications.
GPT4All
A flexible AI model aimed at democratizing access to generative pre-trained transformer technologies, making cutting-edge language models accessible to all developers.
LangChain
An open-source framework designed for building and deploying language-centric applications, leveraging AI to simplify complex linguistic processes.
Rasa
An open-source machine learning framework for automated text and voice-based conversational agents, enabling developers to build sophisticated AI assistants.
OpenAI
An industry-standard foundation model provider offering GPT, vision, and embedding APIs for intelligent assistants, content generation, and more.
Node.js
A runtime environment that allows for the execution of JavaScript code server-side, known for its event-driven, non-blocking I/O model that makes it lightweight and efficient.
PHP
A widely used open source scripting language especially suited for web development, embedded into HTML, making it simple to add functionality to web pages without external files.
Python
A high-level, interpreted language known for its clear syntax and readability, extensively used in web development, scientific computing, and data analysis.
Java
A robust, object-oriented programming language widely used for building enterprise-scale web applications, known for its portability across platforms from mainframe data centers to smartphones.
OpenZeppelin
Provides security products to build, automate, and operate decentralized applications, offering standard & audited smart contracts and tools for the Ethereum network.
Ethers.js
A universal library aimed at interacting with the Ethereum Blockchain and its ecosystem, simplifying the integration of client-side applications with blockchain features.
Web3
Represents a new paradigm for applications that operate on decentralized networks, enhancing user sovereignty and security.
Solidity
A programming language specifically designed for developing smart contracts that run on the Ethereum blockchain, enabling automated and secure transactions.
OpenSea
The largest marketplace for buying, selling, and discovering rare digital items and non-fungible tokens (NFTs) using blockchain technology.
Pinata
A cloud-based service that simplifies managing and deploying files across the decentralized web using IPFS technology, ensuring secure and persistent file storage.
DigitalOcean
A cloud infrastructure provider offering scalable compute platforms with virtual servers (Droplets), designed for developers to build, test, and scale applications easily.
AWS
The world's most multifaceted and broadly adopted cloud platform, offering over 200 fully featured services from data centers globally.
Hetzner
A German data center operator providing dedicated servers, colocation, and cloud solutions that emphasize performance, security, and reliability.
Docker
A platform for developing, shipping, and running applications inside lightweight and portable containers which use shared operating systems.
Ansible
An open-source automation tool for software provisioning, configuration management, and application deployment that facilitates complex workflows and automates cloud provisioning.
MySql
A popular open-source relational database management system known for its reliability and ease of use, ideal for both small and large applications.
MongoDB
A NoSQL database known for its high performance, high availability, and easy scalability, using a document-oriented data model that supports varied data types and dynamic schemas.
PostgreSQL
An advanced, open-source relational database system known for its reliability, technical standards compliance, and powerful features like flexible query mechanisms.
Redis
An in-memory data structure store, used as a database, cache, and message broker, known for its speed and supporting varied data structures such as strings, hashes, lists, and sets.
Elasticsearch
A search engine based on the Lucene library, providing a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents.
Miro
An online collaborative whiteboarding platform to bring teams together, anytime, anywhere. Ideal for brainstorming, planning projects, and managing workflows.
Adobe Photoshop
A top-tier software for image editing, graphic design, and digital art, offering powerful tools for photo retouching and creating stunning visuals.
Adobe Illustrator
Essential software for vector graphic design, used to create logos, icons, drawings, typography, and complex illustrations for any medium.
Procreate
A digital painting app for iPads, known for its intuitive interface and rich suite of brushes and tools ideal for artists on the go.
Jitter
A powerful motion design tool that lets you animate your designs easily without complex timelines, making it perfect for designers new to animation.
Angular
A platform and framework for building single-page client applications using HTML and TypeScript, known for its ability to empower developers to build applications that live on the web, mobile, or desktop.
SCSS
An extension of CSS that enables using variables, nested rules, inline imports, and more, keeping things organized and helping us create style sheets faster.
TypeScript
A strongly typed programming language that builds on JavaScript, providing better tooling at any scale, with the capability to catch errors early through its type system.
NextJS
A framework for server-rendered or statically exported React applications, simplifying tasks like routing and tooling, and improving performance with techniques like automatic code splitting.
React
A JavaScript library for building user interfaces, particularly for single-page applications where fast interaction between the user and the application are required.
React Native
A Meta-backed framework that renders genuine native UI from a JavaScript/TypeScript codebase. Uses the Fabric architecture for high-speed bridging and offers a massive ecosystem for rapid, cross-platform feature delivery.
Swift
Apple’s type-safe, high-speed language for iOS, macOS, and visionOS. Features modern syntax (SwiftUI), ARC memory safety, and direct hardware access. Now a powerful open-source server-side option (Vapor), enabling full-stack Swift development.
Kotlin
Concise, null-safe JVM language from JetBrains that powers Android apps and Kotlin Multiplatform projects, with coroutines, seamless Java interoperability, and high-performance collections.
Flutter
Google’s Dart-based UI toolkit for mobile, web, and desktop. Uses the Impeller rendering engine to ensure stutter-free 120 FPS performance. Its "everything is a widget" approach provides total pixel-level control from a single codebase.
Ionic
A web-first SDK built on Web Components, enabling mobile development with HTML, CSS, and JavaScript. Framework-agnostic (React, Vue, Angular) and powered by Capacitor, it’s a strong choice for enterprise teams leveraging existing web expertise.
Expo
An advanced ecosystem for React Native that reduces the complexity of native configurations. It manages builds, submissions, and over-the-air updates via EAS, enabling teams to ship updates without direct work in Xcode or Android Studio.
Capacitor
A modern web-to-native runtime that bridges web applications to native device APIs. Compared to legacy hybrid approaches, it generates standard native projects, giving developers full access to the underlying iOS and Android source code.
IN REVIEWS WE TRUST
BasedI’m most impressed with SapientPro’s development skills. They’ve developed our entire platform, and we didn’t have any in-house specialists to instruct them on how to build it.
WHY CHOOSE SAPIENTPRO FOR LEGACY MODERNIZATION
01
Production Code as the Deliverable
Each legacy application modernization engagement concludes with a working system in your production environment, documented and ready for your team to extend. The output is the codebase itself, the system you will run and own going forward.
02
A Fixed Price, Set After the Audit
The audit precedes the quote in legacy system modernization services. Once the codebase, data model, and all integrations are mapped, we set a fixed price and a milestone plan. A codebase more complex than indicated remains our cost to absorb.
03
Direct Experience With Your Stack
Most legacy codebases we see have the same problems underneath. A framework that stopped getting updates two versions ago. A frontend the team avoids. An ERP tangled into the application layer. We've seen those patterns enough times to spot them in the audit.
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