Let's talk about your project
Tell us what you're running, what's causing problems, and what you need it to look like after. We'll assess the system and scope the right migration approach.
Legacy system slowing down your team and blocking new features because no one wants to touch it?
Security vulnerabilities in unsupported framework versions your compliance team is asking about?
Software Modernization Services
Legacy software doesn't fail all at once. It accumulates: a framework version that stopped receiving security patches, a database version that can't scale to current load, a codebase that takes two days to onboard a new engineer, a vendor dependency that charges by the seat for thousands of seats you no longer need.
Software modernization is the systematic process of replacing what's holding your business back -- updating the architecture, re-platforming to current infrastructure, replacing proprietary dependencies -- without the disruption of a full rebuild from scratch.
Legacy system modernization without rewriting everything at once -- phased, low-risk migration
Framework and platform upgrades, database migrations, and cloud re-platforming
Proprietary vendor replacement with open-source or custom alternatives
Full source code ownership after migration -- no ongoing licensing dependency
RaftLabs provides software modernization services -- migrating legacy applications to modern frameworks, re-platforming to cloud infrastructure, replacing proprietary vendor dependencies, upgrading databases, and improving codebases that have accumulated technical debt. Software modernization uses a phased approach to reduce risk: the existing system stays operational while the modernized version is built and validated in parallel. Most software modernization projects deliver in 3--9 months depending on scope, at a fixed cost per phase.
Technical debt is a business problem, not just an engineering one
Every week your team spends working around the legacy system is a week they're not building new features. Every security patch that can't be applied because the dependency is four versions behind is a compliance risk. Every new engineer who takes three weeks to understand the codebase is a recruiting cost.
Software modernization is the business decision to stop paying the ongoing tax of the legacy system.
What we modernize
Framework and runtime upgrades
Migration from outdated framework versions to current, actively maintained versions -- Rails 4 to Rails 7, Node.js LTS upgrades, Angular 8 to 17, React class components to hooks, PHP 7 to PHP 8, and Python 2 to Python 3. We handle the breaking changes, update the test suite, and validate functionality before cutover.
Cloud re-platforming
Migration from on-premise infrastructure or end-of-life hosting to AWS, GCP, or Azure. Containerisation with Docker and Kubernetes, serverless architecture for appropriate workloads, and managed database services that eliminate server administration overhead. Infrastructure-as-code with Terraform so your cloud setup is reproducible and auditable.
Database migration and upgrade
Database engine upgrades (MySQL 5.7 to 8.0, PostgreSQL 12 to 16), NoSQL to relational migration where the data model warrants it, sharding strategies for databases that have outgrown single-instance capacity, and read replica configuration for reporting workloads. Zero-downtime migration strategies that keep the production system live during migration.
Monolith to microservices
Incremental decomposition of monolithic applications into independently deployable services -- starting with the highest-value or highest-pain domains, not a full rewrite. Strangler-fig migration pattern: new services built alongside the existing monolith, traffic shifted one domain at a time. The monolith shrinks incrementally rather than being replaced in a single cutover.
Vendor dependency replacement
Replacing proprietary SaaS dependencies that have become cost-prohibitive or are limiting your architecture -- custom-built replacements for Salesforce functions you're using a fraction of, open-source alternatives to expensive analytics platforms, self-hosted replacements for third-party services that require data sovereignty. Vendor replacement is often the fastest path to reducing operating costs.
Codebase rehabilitation
Refactoring accumulated technical debt that's slowing your team -- removing dead code, standardising patterns, adding test coverage to untested legacy code, updating documentation, and restructuring the module boundaries so the codebase is navigable by someone who didn't write it. The codebase rehabilitation that takes new engineer onboarding from two weeks to two days.
Software modernization that keeps your production system running throughout
Phased migration, no big-bang rewrite, fixed cost per phase. We modernize what's holding you back.
How we approach modernization
Assessment before recommendation
Before recommending an approach, we assess the existing system -- codebase structure, dependency audit, infrastructure inventory, and performance bottleneck identification. We tell you what needs modernizing, what can stay as-is, and which approach (modernize vs. rebuild) makes more sense. Honest assessment before any development commitment.
Phased migration, not big-bang replacement
We scope modernization in phases, each delivering a defined outcome. The existing system stays operational throughout. Phase 1 might be framework upgrade and test suite update. Phase 2 might be cloud re-platforming. Phase 3 might be database migration. Each phase has a defined scope and fixed cost so you can approve and fund each phase independently.
Validated against production data
Every modernization phase is validated against real production data before traffic cutover. We don't validate against synthetic test data that doesn't reflect your actual usage patterns. If the modernized system can't handle your production load, we catch it before your users do.
Knowledge transfer included
After modernization, your team needs to understand and maintain the new system. We document the architecture decisions, write runbooks for operational procedures, and conduct handoff sessions with your engineering team. Modernization that creates new dependency on us to maintain it has failed to solve the original problem.
Stop paying the ongoing cost of your legacy system
Phased modernization that keeps your production system running. Fixed cost per phase.
Related services
Legacy Modernization -- full legacy system migration and replacement
Custom Software Development -- bespoke software for specific requirements
Product Engineering -- ongoing product development post-modernization
API Development -- API layer design and development
Business Systems Integration -- connecting modernized systems to your business stack
Frequently asked questions
Software modernization is the process of updating, re-platforming, or re-architecting legacy software to meet current requirements -- without rebuilding from scratch. It's the right approach when: (1) Your codebase uses an unsupported framework or runtime version with known security vulnerabilities. (2) Your database can't handle current load or doesn't support the features your product needs. (3) Your application runs on on-premise infrastructure that can't scale and is approaching end-of-life. (4) Developers take 2+ days to onboard because the codebase is undocumented and structurally complex. (5) Your proprietary SaaS dependency has increased pricing to unsustainable levels and needs replacing with a custom or open-source alternative. Modernization is preferable to a full rebuild when the business logic is sound and the core data model is worth preserving -- which is most cases.
Software modernization preserves the working business logic, data model, and integrations while updating the components that are causing problems -- the framework, the infrastructure, the database, or the architecture pattern. A full rebuild starts from scratch and reimplements everything. Modernization is lower risk because the existing system can stay running while the modernized version is built and validated in parallel. A full rebuild is appropriate when the existing system is so structurally broken that it's cheaper to start over than to migrate -- which is less common than teams assume when they're frustrated with a legacy system. We assess your system during scoping and give you an honest recommendation on which approach is right.
We use a strangler-fig approach for most modernization projects: the existing system continues running, while we build the modernized version in parallel, migrating one module or service at a time. Users are shifted to the modernized components only after they've been validated against real traffic patterns. The existing system is the fallback at each stage. This means you never have a cutover moment where everything changes at once -- the risk is distributed across the migration timeline, and any issue affects one component, not the entire system. We document the migration plan before starting and get your sign-off on the phase boundaries.
A focused modernization project -- one major component migrated (e.g., framework upgrade from Rails 4 to Rails 7, or monolith to microservices for one service domain) -- typically runs $20,000--$60,000. A full platform modernization covering re-platforming to cloud, framework upgrade, database migration, and performance optimization runs $60,000--$200,000+ depending on system complexity. We scope in phases and price each phase separately, so you can proceed one phase at a time as budget allows.