Kubernetes Modernization for Critical Apps

Cross-cutting expertise complementing our payment and signature offers: we modernize the infrastructure hosting your critical journeys without replacing your business integration.

Where we engage most often

Progressive migration from legacyVMs, monoliths, or PaaS to evolve toward Kubernetes without cutting production.
Unstable production platformPoorly scoped quotas, RBAC, Helm, or observability — recurring incidents and manual hotfixes.
Containerized payment or signature appsTransactional APIs, PSP/QTSP secrets, homogeneous dev/staging/prod environments.
CI/CD and GitOps industrializationReproducible pipelines, ArgoCD/Flux, rollback procedures, and backported hotfixes.
Regulated sector complianceBanking, insurance, healthcare: RBAC governance, NetworkPolicy, secrets, and deployment traceability.

Entry offer — Kubernetes migration diagnostic

5–10 business days

Application and dependency mapping
Maturity assessment (Nuvelia checklist)
Risk matrix and go/no-go recommendations
Migration effort estimate and phasing

CIOs/CTOs deciding between lift-and-shift, refactor, or rebuild

Warning signs on your platform

Unstable cluster without governancePermissive RBAC, unisolated namespaces — accidental production deletion risk.
Hard-coded secrets and configsPSP keys or certificates baked into images — rotation impossible, audits blocked.
Helm without rollback procedureChart upgrades without backup or CHANGELOG review — potential data loss.
Incomplete GitOpsManual hotfixes not backported — a Git revert redeploys a vulnerable version.
Insufficient observabilityNo log/metric/trace correlation — MTTR too long on transactional incidents.
Big-bang migrationFull cutover attempt without a pilot — rollback impossible on failure.

What Nuvelia delivers

Target Kubernetes architecture (multi-env, network, storage)
Operational CI/CD pipeline and GitOps model
RBAC, NetworkPolicy, and secrets management
Operations runbook, DR, and hotfix procedures
Phased migration plan with go/no-go criteria
Knowledge transfer to your teams

Regulated application specialization

Payment API containerization and PSP secrets management
3DS and strong authentication journeys on Kubernetes infrastructure
Signature and identity microservices
Homogeneous environments (dev/staging/prod) with S3/Redis and externalized configs

Our 4-step approach

Diagnostic
Mapping, maturity, risks, and lift-and-shift vs refactor decision.
Pilot
Migrate 1–2 critical applications, baseline CI/CD and RBAC.
Industrialization
Advanced hardening (PSA, policies), observability, and full GitOps.
Handover
Runbook, DR, and team autonomy ramp-up.

Field experience (anonymized)

ACS 3D Secure — authentication journey containerization

Context: 3DS strong authentication service to industrialize on cloud infrastructure.

Nuvelia role: Component containerization, externalized configs, S3 object storage, Redis cache, secrets management, and homogeneous dev/staging/prod environments.

Outcome: Containerized platform ready to scale with reproducible deployments.

PostgreSQL Helm — migration without data loss

Context: Production Helm chart upgrade with no documented procedure.

Nuvelia role: Helm upgrade procedure with backup, tested rollback, and systematic CHANGELOG review.

Outcome: Migration completed without data loss and reusable procedure for the team.

Post-migration RBAC governance

Context: Recently migrated Kubernetes cluster with overly broad production permissions.

Nuvelia role: RBAC hardening, role separation, namespace access policies, and binding review.

Outcome: Accidental production namespace deletion prevented after hardening.

Complementary business expertise

Common questions

Does Kubernetes replace your payment and signature offers?

No. It is cross-cutting expertise: we modernize the infrastructure hosting your business journeys, complementing PSP or signature integration.

Can you work on an existing cluster?

Yes — audit, RBAC/Helm/GitOps stabilization, or recovery after incidents without starting from scratch.

How long for a pilot?

A scoped pilot (1–2 applications) typically takes 4–8 weeks depending on legacy and regulatory constraints — confirmed after diagnostic.

Related guides

Your technical contact

Nabil Hsissi

Cloud & Kubernetes architect · 20 years designing and operating critical systems

Sectors: banking, insurance, telecom

You speak directly with the architect who will scope your project — not with a sales-only intermediary. Nuvelia has been supporting clients for over 14 years.

Contacts

Kubernetes Migration & Cloud Modernization