Legacy Application Migration to Modern Infrastructure

We migrate legacy applications to modern cloud platforms—rehosting, replatforming, or refactoring outdated systems to reduce costs, enhance security, and unlock cloud-native capabilities.

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Trusted and top rated tech team

Migrating legacy systems to modern infrastructure

Legacy applications running on outdated infrastructure cost more to maintain, create security vulnerabilities, and can’t scale with business growth. Moving to modern cloud platforms reduces hardware costs, improves security with managed services, and enables scalability. We assess your legacy systems, choose the right strategy—rehost, replatform, or refactor—and execute phased approaches that minimize downtime and business risk.

Our capabilities include:

Legacy application assessment & planning
Strategy development (7 R's)
Cloud platform selection & architecture
Phased execution & testing
Data transfer & integrity validation
Post-deployment optimization & monitoring

Who we support

Legacy application migration suits companies running outdated systems that increase costs, create security risks, or limit business growth. We work with organizations modernizing infrastructure, moving to the cloud, or replacing end-of-life technology.

Companies with Aging Infrastructure

Your on-premises infrastructure is costly to maintain, hardware is reaching end-of-life, and vendor support is ending. Legacy migration moves applications to modern cloud platforms, cutting maintenance costs and improving security/scalability.

Businesses Needing Compliance

Outdated systems can't meet current security or compliance requirements. Cloud migration provides updated security features, automated compliance monitoring, and audit trails that legacy systems lack.

Organizations Scaling Operations

Your business is growing but legacy applications can't scale to meet demand. Cloud migration enables auto-scaling, better performance during traffic spikes, and geographic distribution—supporting business growth without infrastructure constraints.

Ways to engage

We offer a wide range of engagement models to meet our clients’ needs. From hourly consultation to fully managed solutions, our engagement models are designed to be flexible and customizable.

Staff Augmentation

Get access to on-demand product and engineering team talent that gives your company the flexibility to scale up and down as business needs ebb and flow.

Retainer Services

Retainers are perfect for companies that have a fully built product in maintenance mode. We'll give you peace of mind by keeping your software running, secure, and up to date.

Project Engagement

Project-based contracts that can range from small-scale audit and strategy sessions to more intricate replatforming or build from scratch initiatives.

We'll spec out a custom engagement model for you

Invested in creating success and defining new standards

At Curotec, it is more than just the solutions we build. We value relationships between our people and our clients — that partnership is why CEOs, CTOs, and CMOs turn to Curotec.

Replatforming a clinical decision support tool used by physicians globally

Why choose Curotec for modernizing legacy apps?

We assess technical debt and dependencies before migration, developing strategies that minimize risk and downtime. Our team executes phased migrations with rollback plans, validates data integrity, and optimizes for cloud-native performance—handling complex refactoring and modernizing monolithic architectures to microservices.

1 Extraordinary people, exceptional outcomes

Our outstanding team represents our greatest asset. With business acumen, we translate objectives into solutions. Intellectual agility drives efficient software development problem-solving. Superior communication ensures seamless teamwork integration.

2 Deep technical expertise

We don’t claim to be experts in every framework and language. Instead, we focus on the tech ecosystems in which we excel, selecting engagements that align with our competencies for optimal results. Moreover, we offer pre-developed components and scaffolding to save you time and money.

3 Balancing innovation with practicality

We stay ahead of industry trends and innovations, avoiding the hype of every new technology fad. Focusing on innovations with real commercial potential, we guide you through the ever-changing tech landscape, helping you embrace proven technologies and cutting-edge advancements.

4 Flexibility in our approach

We offer a range of flexible working arrangements to meet your specific needs. Whether you prefer our end-to-end project delivery, embedding our experts within your teams, or consulting and retainer options, we have a solution designed to suit you.

Key capabilities for successful migrations

Technical Debt Assessment

Analyze architecture, dependencies, and code quality—identifying technical debt, vulnerabilities, and bottlenecks before migration.

Migration Strategy Selection

Select the best rehost, replatform, refactor, rebuild, or replace strategy based on your technical constraints, budget, timeline, and business goals.

Phased Migration Execution

Execute migrations in controlled phases with pilot testing and validation checkpoints—minimizing disruption and enabling rollback.

Data Migration & Validation

Migrate databases with schema transformations, data cleansing, and integrity validation—ensuring no data loss during migration.

Cloud-Native Optimization

Refactor applications to leverage auto-scaling, managed databases, and serverless functions—unlocking cloud performance and cost benefits.

Rollback & Risk Mitigation

Implement rollback plans, maintain parallel systems, and establish monitoring for quick issue detection throughout migration.

Tools & technologies for legacy migration

Application Assessment & Discovery

We analyze legacy systems using discovery tools to map dependencies, identify technical debt, and plan migrations.

Dependency Mapping Tools – Use application discovery tools to map dependencies between applications, databases, and services, identifying what needs to migrate together and potential integration challenges.
Code Analysis & Static Testing – Analyze legacy codebases with static analysis tools to identify security vulnerabilities, code quality issues, deprecated libraries, and compatibility problems before migration.
Performance Baseline Metrics – Establish performance baselines for legacy systems measuring response times, throughput, and resource utilization to compare against post-migration performance.
Architecture Documentation – Document existing system architecture, data flows, integration points, and business logic to create a comprehensive migration roadmap and reference guide.
Technical Debt Quantification – Assess and quantify technical debt including outdated frameworks, security patches, code complexity, and maintenance costs to justify migration investment.
Risk Assessment & Prioritization – Identify migration risks like data loss, downtime, or functionality breaks, prioritizing critical applications and establishing mitigation strategies before execution.

Cloud Platform Architecture

Our team designs cloud infrastructure on AWS, Azure, or Google Cloud for your migrated applications with scalability.

Cloud Provider Selection – Evaluate AWS, Azure, and Google Cloud based on your application requirements, existing integrations, compliance needs, and cost optimization opportunities.
Infrastructure as Code – Define cloud infrastructure using Terraform or CloudFormation, enabling version-controlled, repeatable deployments and consistent environments across staging and production.
Network Architecture Design – Design VPCs, subnets, security groups, and network routing for secure, isolated cloud environments with proper segmentation and access controls.
High Availability Configuration – Implement multi-region or multi-availability-zone architectures with load balancing and failover capabilities ensuring uptime and disaster recovery.
Auto-Scaling Setup – Configure automatic scaling policies that adjust compute resources based on traffic patterns, optimizing performance during spikes while controlling costs during low usage.
Hybrid Cloud Integration – Design hybrid architectures connecting on-premises systems with cloud resources during phased migrations, maintaining connectivity and data synchronization across environments.

Database Migration & Modernization

We migrate databases to cloud platforms, converting schemas and optimizing for managed database services like RDS or Aurora.

Schema Conversion & Analysis – Convert database schemas from legacy systems to cloud-compatible formats, identifying incompatibilities and optimizing table structures for cloud database services.
Data Migration Tools – Use AWS Database Migration Service, Azure Database Migration Service, or custom ETL tools for transferring large datasets with minimal downtime.
Managed Database Services – Migrate to managed services like Amazon RDS, Aurora, Azure SQL Database, or Cloud SQL, eliminating database administration overhead and gaining automatic backups.
Data Validation & Integrity – Verify data completeness and accuracy post-migration using checksums, row counts, and business logic validation to ensure no data loss or corruption.
Performance Optimization – Optimize database queries, indexes, and configurations for cloud environments, leveraging features like read replicas and query caching for improved performance.
Database Modernization – Refactor from legacy databases to modern alternatives like PostgreSQL, NoSQL databases, or data warehouses when legacy systems limit scalability or performance.

Containerization & Orchestration

Curotec containerizes applications with Docker and manages deployments using Kubernetes for scalable, portable infrastructure.

Application Containerization – Package legacy applications into Docker containers with dependencies, libraries, and configurations, creating portable units that run consistently across environments.
Container Image Optimization – Optimize container images by minimizing size, using multi-stage builds, and implementing security scanning to reduce attack surface and improve deployment speed.
Kubernetes Cluster Setup – Configure Kubernetes clusters on EKS, AKS, or GKE for container orchestration, providing automated deployment, scaling, and management of containerized applications.
Service Mesh Implementation – Implement service meshes like Istio or Linkerd for managing microservices communication, providing traffic control, security, and observability between containerized services.
Container Registry Management – Set up private container registries like ECR, ACR, or GCR for storing, versioning, and distributing container images securely across development and production.
Helm Charts & Deployment – Create Helm charts for packaging Kubernetes applications, enabling templated deployments with configuration management across multiple environments and release versions.

CI/CD Pipeline Implementation

We establish automated deployment pipelines enabling continuous integration and delivery for modernized applications in the cloud.

Pipeline Automation Tools – Implement CI/CD platforms like Jenkins, GitLab CI, GitHub Actions, or AWS CodePipeline for automating build, test, and deployment workflows.
Automated Testing Integration – Configure automated unit tests, integration tests, and security scans that run on every code commit, catching issues before deployment to production.
Build & Artifact Management – Set up automated build processes generating deployment artifacts, container images, or compiled binaries with versioning and artifact repositories for tracking releases.
Environment Promotion Strategy – Design promotion workflows moving code through dev, staging, and production environments with approval gates and automated validation at each stage.
Blue-Green & Canary Deployments – Implement deployment strategies like blue-green or canary releases for zero-downtime deployments, enabling quick rollback if issues arise in production.
Infrastructure Pipeline Integration – Integrate infrastructure-as-code into CI/CD pipelines, automatically provisioning and updating cloud resources alongside application deployments for consistent infrastructure.

Monitoring & Performance Optimization

Our developers implement monitoring tools and optimize cloud resources for cost efficiency and performance after migration.

Application Performance Monitoring – Implement APM tools like New Relic, Datadog, or Application Insights tracking response times, throughput, error rates, and user experience metrics in real-time.
Infrastructure Monitoring Setup – Configure CloudWatch, Azure Monitor, or Stackdriver for tracking CPU, memory, disk, and network utilization across cloud resources with alerting thresholds.
Log Aggregation & Analysis – Centralize application and infrastructure logs using ELK Stack, Splunk, or CloudWatch Logs for troubleshooting, security auditing, and performance analysis.
Cost Monitoring & Optimization – Track cloud spending with cost management tools, identify underutilized resources, right-size instances, and implement reserved capacity for significant cost reductions.
Performance Tuning & Scaling – Optimize application performance through caching strategies, database query optimization, CDN implementation, and auto-scaling configuration based on usage patterns.
Alerting & Incident Response – Set up intelligent alerting for critical issues with escalation policies and on-call rotations, ensuring rapid response to performance degradation or outages.

FAQs about legacy application migration

How long does legacy application migration take?

Timeline depends on application complexity, chosen migration strategy, and technical debt. Simple rehost migrations take 2-4 weeks. Replatforming with optimization takes 1-3 months. Complex refactoring or rebuilds take 3-6+ months. We provide detailed timelines after assessing your specific applications and infrastructure requirements.

What's the difference between rehosting and refactoring?

Rehosting (lift-and-shift) moves applications to cloud infrastructure with minimal changes—fast but doesn’t optimize for cloud benefits. Refactoring redesigns application architecture to leverage cloud-native features like auto-scaling and managed services—more time-intensive but delivers better performance, cost savings, and scalability long-term.

How do you minimize downtime during migration?

We use phased migration approaches, blue-green deployments, and parallel system operations to minimize downtime. Critical applications migrate during low-traffic periods with rollback plans ready. For zero-downtime requirements, we implement database replication and traffic routing strategies ensuring continuous availability throughout migration.

What happens if the migration fails?

We maintain rollback plans with snapshots, backups, and parallel legacy systems during migration. If critical issues arise, we revert to the previous environment while addressing problems. Our phased approach and pilot testing catch most issues before production migration, reducing failure risk significantly.

Can you migrate apps we don't have source code for?

Yes, though options are limited. We can rehost compiled applications or use containerization for portability. For deeper modernization without source code, we assess whether to rebuild, replace with SaaS alternatives, or use reverse engineering tools. Each situation requires specific evaluation and strategy.

How do you handle data migration without data loss?

We use validated migration tools, implement data validation checks comparing source and destination, maintain backups throughout the process, and perform test migrations before production. Post-migration validation includes checksums, row counts, and business logic verification ensuring complete, accurate data transfer.

Ready to have a conversation?

We’re here to discuss how we can partner, sharing our knowledge and experience for your product development needs. Get started driving your business forward.