Legacy Software Modernization Company

Legacy software modernization is the structured upgrade of older applications, architecture, and infrastructure so they become secure, scalable, and easier to evolve.

A legacy modernization company (like Stormotion) assesses your codebase and systems, then applies the right mix of refactoring, replatforming, re-architecting, or selective rewrites. We also modernize UX and accessibility, tighten security, and enable cloud migration so your product can move faster with lower risk.

Modernization reduces technical debt, improves performance and reliability, strengthens security and compliance, and lowers operating costs, while unlocking faster delivery of features users feel.

Partnering with a legacy modernization software company gives you a proven playbook (assessment → roadmap → phased rollout) and an experienced team that ships improvements with feature flags, parallel runs, and measurable KPIs.

As a legacy software modernization agency, we choose modern security technologies tools that match your goals and constraints: React Native / TypeScript for cross-platform mobile/tablet, React/Next.js for web, Node.js / GraphQL for APIs, and native Android (Kotlin) for kiosk/embedded or low-performance devices. On the platform side, we use AWS/Azure, containerization, CI/CD, and full observability (logs, metrics, tracing).

We run a short assessment to map business goals, technical debt, risks, and timelines. From there, we recommend the lightest-weight path that meets your targets: refactor for quick wins, replatform when infrastructure is the bottleneck, and rewrite only when tech or UX constraints make incremental change impractical.

Yes, we can modernize legacy system without downtime. We use the strangler pattern, feature flags, parallel runs, and staged rollouts. That lets us ship improvements behind safeguards, validate in production with limited exposure, and switch traffic over when telemetry looks healthy.

Our modernization approach looks like: assessment → roadmap → proof(s) of concept → phased implementation → optimization. Throughout, we set KPIs (stability, performance, delivery speed, cost) and instrument observability so progress is measurable.

Absolutely. We address evolving threats, secrets and access controls, data retention, auditability, and GDPR considerations. On the product side, we modernize UX with accessibility in mind (WCAG 2.2 AA practices) and align with your internal security/compliance guidelines.

AWS and Azure are our defaults for modern applications. We implement containerization, managed databases, CI/CD, and full observability (tracing, logs, metrics, SLOs). We also adopt platform tooling you already use to reduce change friction.

Yes. We start with a code/architecture review, set up observability to “see” runtime behavior, and prioritize quick remediation of stability/performance risks. We document outdated systems as we go and create a shared knowledge base so your team can operate confidently.

We design a validated path of migration services: schema mapping, ETL/ELT pipelines, change-data-capture (CDC) for live systems, reconciliation checks, and rollback plans. The goal is zero data loss and consistent behavior before, during, and after migration.

Not necessarily. We often start with modularizing the monolith and introducing cleaner APIs. Microservices are optional and only make sense when they clearly reduce risk or speed up delivery; we make that call together with your team.

Yes. We build a thin adapter layer, run both providers in parallel for a period, migrate data if required, and switch traffic once metrics look good. This reduces risk and avoids a big-bang switch. You can read more about our approach in the Caspar Health case study.

As a part of our legacy modernization services, we baseline and track what matters: crash-free sessions, P95/P99 latency, startup time, release cadence, incident MTTR (Mean Time To Repair), infrastructure cost, and user outcomes (conversion, retention, task success). We report progress regularly and keep the plan adjustable.

Timelines depend on scope and risk tolerance, but many projects move from assessment to first releases within months and complete core phases in 3–5 months. A legacy software modernization firm will phase work to minimize disruption, starting with quick wins and high-impact risks, then rolling out improvements in sprints. We’ll map a plan with clear milestones and success metrics so you always see progress.

We start with an assessment and a Discovery Phase. Then we propose a backlog with priorities, a monthly modernization unit (€10k–€15k/month), and checkpoints every 2–4 weeks. Changes in scope are discussed early, with clear impact on timeline/budget.

We typically set up a legacy application modernization unit: full-time full-stack engineers plus part-time QA, part-time UX/UI, and part-time PM/Scrum Master. The usual price for this unit is €10k–€15k per month. Most projects complete in 3–5 months, putting typical totals in the €30k–€75k range. But scope and complexity may shift this cost up or down.