01
Production blocked
Reproduce, isolate and correct a route that prevents activity.
- Runtime error
- API unavailable
- Payment blocked
- Hotfix controlled
Technical emergency · Maestro Rescue
Stabilise your application before the next incident
I analyse, corrects and documents Next.js and TypeScript applications that are weakened by a blocking bug, migration, broken deployment or technical debt that has become critical.
Interactive demonstration
See an application resume becoming readable and manageable.
Explore a stabilization dashboard designed to track incidents, priorities, fixes and return to a healthy state.- Demonstration data
- Interactive course
- Opening in a new tab
01 / Finding
Fixing fast must not create the next problem
A serious recovery begins by securing the current state, reproducing the incident and distinguishing the symptom from the cause. The intervention plan protects the service before improving the code.
- Blocking error in production
- Build or deployment impossible
- Regression after updating
- Degraded loading time
- Obsolete or vulnerable dependency
- Code without testing or documentation
02 / Applications
An intervention adapted to the actual nature of the incident
02
Build and deployment
Restore a reliable build chain and production.
- CI/CD
- Variables
- Vercel
- Docker
03
Migration Next.js
Pass a critical version without breaking roads, data or components.
- App Router
- React
- Dependencies
- Controlled codemods
04
Performance
Treat technical causes that slow down experience and conversion.
- LCP
- INP
- Images
- Bundles
05
Application security
Correct the configuration, access or validation flaws observed.
- Auth
- Permissions
- Secrets
- Validation
06
Technical debt
Separate useful refactors from risky and costly rewrites.
- Architecture
- Tests
- Types
- Documentation
03 / Standard Maestro
Successful recovery leaves a more understandable application than before
Each correction is linked to a cause, test and delivery note. Risk changes are isolated, backlashes are possible and priorities are discussed before the intervention.
- 01
Reproduction before correction
- 02
Backup and Rollback
- 03
Limited and re-read patch
- 04
Non-regression tests
- 05
Change log
- 06
Audited Dependencies
- 07
Post-deployment monitoring
- 08
Residual debt plan
04 / Offers
A clear level of response depending on the urgency and depth
Priority diagnosis
490 € excl. VAT
Get a reproduction, cause analysis and a costed intervention plan.
- Review of the deposit
- Reproduction
- Log analysis
- Correction plan
First analysis within 24 to 48 hours
Start diagnosisPriority intervention
From 1 490 € excl. VAT
Correct a well-identified incident with a short delivery window.
- Priority period
- Correction
- Targeted test
- Emplacement with accompanying personnel
2-3 working days
Reserve interventionSprint of stabilization
From 3 900 € excl. VAT
Treat several related causes and return critical pathways to control.
- Targeted audit
- Priority corrections
- Tests
- Monitoring and handover
5 to 8 working days
Schedule sprintApplication recovery
From 6 900 € excl. VAT
Take a fragile base back, migrate critical parts and restore a sustainable base.
- Target architecture
- Progressive migration
- Critical tests
- Full documentation
2 to 6 weeks
Study recovery05 / Continuity
Notify the next emergency with adapted continuity
Corrective watch
390 € excl. VAT / month
- Grouped updates
- Monthly review
- 1 hour corrective included
Active maintenance
€790 excl. VAT / month
- Monitoring
- Updates
- 4 hours corrective
- Monthly report
Enhanced priority
1 490 € excl. VAT/month
- Priority channel
- 8 a.m. corrective
- Performance review
- Quarterly plan
06 / Method
A visible progression, from framing to production
- 01
Qualification
Impact, affected users, time frame and access available.
- 02
Security
Backup, environment, branch and strategy of rollback.
- 03
Reproduction
Accurate scenario, logs, data and trigger conditions.
- 04
Correction
Minimum Patch or Refactor set according to confirmed cause.
- 05
Validation
Non-regression tests and verification of neighbouring routes.
- 06
Delivery
Deployment, monitoring, documentation and residual debt.
The emergency remains governed by safeguards
Access is limited, changes can be traced and deployment can continue to be a return route. Urgent intervention never justifies weakening essential controls.
- Temporary access
- Unshared secrets
- Dedicated Branch
- Pull request reread
- Rollback prepared
- Logs after delivery
Selected technologies as required
- Next.js
- React
- TypeScript
- Node.js
- PostgreSQL
- Supabase
- Vercel
- Docker
- GitHub Actions
- Sentry
- Playwright
Frequently Asked Questions
The answers before starting
Can you intervene immediately?
The first step is a quick qualification. The actual time frame depends on access, reproducibility, risk and ongoing commitments. No correction is promised before this analysis.
Are you working on a code you haven't developed?
Yes, if deposition, environments and dependencies allow a reasonable recovery. The diagnosis confirms this point before any commitment.
Is the diagnosis derived from the intervention?
It can be integrated into the overall budget when the intervention is immediately confirmed, depending on the scope of the proposal.
Can you correct it without rewriting it all?
This is the objective. Rewriting is proposed only if the local correction creates more risk or cost than a progressive migration.
What do you provide after the correction?
A summary of the cause, changes made, tests, monitoring points and remaining recommendations.
Next step
Describe the impact before describing the solution
Indicate the symptom, the environment, the number of users affected and the deadline. You will receive a first orientation within 24 hours.