Application Maintenance Services

Your team ships features. We keep the application secure, fast, and healthy. Every month. Under a fixed SLA.

Proactive monitoring, security patching, and bug triage — all under one fixed monthly retainer. You get a contracted response time for every issue. We handle every maintenance task. You never wonder what your app is doing without you.

Application health board • Live status
Healthy
Warning
Critical
Healthy
Storefront Pro
Next.js + Node
99.97%
30-day uptime
0 issues
open
2d ago
last patch
Healthy
Admin Portal
.NET + React
99.91%
30-day uptime
1 issue
open
5d ago
last patch
Warning
Analytics API
Python + FastAPI
99.72%
30-day uptime
2 issues
open
12d ago
last patch
Critical
Legacy Importer
Node.js v16
97.4%
30-day uptime
4 issues
open
34d ago
last patch
99.9%
Avg uptime
0
Patches this month
0 crit
Open issues
0
Resolved this month
2 hour
Critical response SLA
What Happens Without Maintenance

Three numbers every engineering leader needs to see before skipping a maintenance plan.

Security exposure
0%
of applications have at least one known critical vulnerability in their dependency tree

Dependency vulnerabilities accumulate silently. Most teams find out during a breach or a compliance audit — not before. By then, the damage is done.

Downtime cost
$0
average cost per minute of unplanned application downtime for mid-market businesses

A single 4-hour outage can cost more than a full year of maintenance coverage. You're not buying maintenance. You're buying insurance against a much bigger number.

Performance decay
0%
of applications show measurable performance degradation within 6 months without active optimization

Page load times creep up. Database queries slow down. Cache configurations drift. Users notice before your team does — and they don't send feedback, they leave.

Your Maintenance Dashboard, Every Month

See exactly what's covered. Track every patch, ticket, and SLA in real time.

maintenance-portal.redefine.dev • Application: Storefront Pro
Current SLA status
99.97%
30-day uptime
SLA target: 99.9%
Average response time214ms
Target: 300ms
SLA burn rate12%
Monthly error budget used
Active ticket queue
7 open • 0 critical
Slow query on orders index
MNT-0441 • Opened 2 hours ago
High
Dependency update: next.js 14.2.3
MNT-0440 • Scheduled Tuesday
Patch
Image CDN cache miss rate elevated
MNT-0439 • In progress
Perf
Monthly security scan complete
MNT-0437 • Resolved 4 hours ago
Done
Node 18 LTS compatibility check
MNT-0436 • Resolved yesterday
Done
Last 30 days
Security patches applied
0
Bugs resolved
0
Performance optimizations
0
Average ticket close time
8.4 hours
Monthly report
Sent to your team on the 1st of every month. Includes SLA summary, patch log, performance trends, and your next 30 days of scheduled maintenance.
What Your Maintenance Plan Covers

Everything your application needs to stay healthy — included in one fixed monthly retainer.

DevOps engineer reviewing an all-green healthy application monitoring dashboard with uptime, error-rate and response-time panels on a large screen under warm desk-lamp light, calm and focused, side-profile medium shot
Pillar 01

We see problems before your users do. Here's how.

We monitor uptime, error rates, response times, and database performance 24/7. Alert thresholds trigger at the first sign of degradation — not when the app is already down. Your team gets a notification when response time doubles. Not when customers start calling.

  • Uptime and availability monitoring
  • Error rate and exception tracking
  • Database query performance baseline
Pillar 02

Security patching. Every dependency, every month. Nothing slips through.

Every dependency in your application has a vulnerability window. We run automated CVE scans monthly and apply patches during scheduled maintenance windows — with no application downtime. A critical vulnerability published to the CVE database gets patched within 24 hours.

  • Monthly CVE scan and patch report
  • Zero-downtime patch deployment
  • 24-hour critical vulnerability response
Security engineer reviewing a CVE dependency scan in a VS Code terminal showing mostly green patched packages and no open critical vulnerabilities, calm and focused under natural side-window light, medium shot
Developer completing a bug-fix diff in a VS Code editor with passing tests, hands on the keyboard, lit by warm screen glow in a dim workspace, side-profile tight medium shot
Pillar 03

Bug triage and resolution. Contracted response time on every priority tier.

Every bug gets triaged and tracked. Your SLA defines exactly how fast we respond — based on severity. All resolutions are logged in your monthly report.

Critical
2 hour response
High
4 hour response
Standard
1 day triage
Patch
Monthly window
A Real Maintenance Year: What Actually Happened

12 months of application maintenance. Here's the before, during, and after.

Lead developer reviewing a positive monthly maintenance summary on a laptop showing 99.97% uptime, a green SLA burn rate and zero critical tickets, calm and satisfied under morning window light, above-angle medium-wide shot
Month 0 • Onboarding
Technical audit and coverage begins
Codebase review complete. 47 outdated packages flagged. Security baseline documented. Monitoring live within 72 hours.
Month 1 to 3 • Stabilization
Security patching sprint and performance baseline
47 packages patched across two sprints. 12 critical vulnerabilities closed. Average API response time dropped 28%.
Month 4 to 6 • Optimization
Database optimization and cache improvements
Three slow queries identified and fixed. CDN reconfigured. Peak server load dropped 40% with no infrastructure cost increase.
Month 7 to 9 • Reliability
Zero-day patch: complete before any exploitation window
A critical dependency vulnerability was detected via automated CVE monitoring. Patch deployed within 18 hours of publication. No downtime. No user impact.
Month 10 to 12 • Result
12-month result: 99.97% uptime, zero security incidents
89 patches applied. 34 bugs resolved. Performance 52% better than the starting baseline. The application is healthier than it was on day one.
Why Redefine Application Maintenance

Three reasons clients stop calling us for emergencies within 90 days.

01
Fixed SLA, not best effort
Response time is written into the contract. Not a target. Not a goal.

Most maintenance vendors write "best effort" agreements that hold no one accountable.

Our SLA specifies exact response windows by priority tier, confirmed before work starts. Miss a critical response SLA? The following month is credited — automatically.

02
We take over any application
Built by another team? Inherited from a previous vendor? We onboard it in 2 weeks.

Our onboarding process includes a technical audit, dependency review, infrastructure assessment, and full architecture documentation.

Most applications reach full coverage within 2 weeks. No stack restrictions. No exclusions for legacy code.

Software audit services →
03
Monthly report, every month
A report on the 1st. What was patched, what was fixed, what is coming next.

Most maintenance relationships run invisibly — until something breaks.

Every client receives a monthly report on the 1st: SLA summary, patch log, bug resolution list, performance trends, and the next 30 days of scheduled work. You always know exactly what your retainer covers.

Common Questions

What CTOs and engineering leads ask before starting a maintenance plan.

Application maintenance includes security patching, dependency updates, performance monitoring, bug triage and resolution, infrastructure and uptime monitoring, scheduled compatibility updates, and monthly maintenance reports. We agree on scope and SLA terms before any work begins.

Application maintenance is priced as a fixed monthly retainer based on your application's size, number of services, and traffic levels. The retainer covers a defined number of maintenance hours, all proactive monitoring, security patching, and a contracted SLA for bug response and resolution. One invoice per month. No variable hourly billing. Get a retainer estimate for your application on the pricing page.

Critical bugs affecting availability or data integrity get a 2-hour initial response and a 24-hour resolution target. High-priority bugs affecting core functionality get 4-hour response and 48-hour resolution. Standard bugs are triaged within 1 business day. Every SLA is documented in writing before work starts.

Yes. We take on applications built by any team or agency. Onboarding includes a technical audit of the codebase, a dependency review, an infrastructure assessment, and full architecture documentation. Most applications reach full coverage within 2 weeks. Learn what the onboarding technical audit covers.

Reactive bug fixing means your team reports a problem and we fix it. Proactive maintenance means we find and resolve issues before your users do. This includes automated monitoring alerts, dependency vulnerability scans, performance baseline tracking, and scheduled patching windows. Most proactive maintenance clients report 60 to 80 percent fewer user-reported issues within 90 days.

Get A Maintenance Plan

Get a scoped maintenance plan and SLA in 48 hours. Tell us about your application below.

See the plan first. Commit after. No pitch.

Form

Answer a few questions → technical audit within 48 hours → plan and SLA scoped in 3 days → coverage live within 1 week

48 hours
Audit response
3 days
Plan scoped
2 hours
Critical SLA
Fixed
Monthly rate
Your application brief is in.

We'll complete a technical audit and send a scoped maintenance plan with SLA terms within 48 hours. Watch your inbox.

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