Maintenance and enhancement of web services

Maintenance and enhancement of web services

Support and evolution of existing sites and web services: bugs, new features, integrations, and optimization.

For teams and product owners who already have a system and need a reliable change loop — without switching vendors for every ticket.

About the service

Maintenance means working with a live product: reading your or a previous vendor’s code, fixing defects, careful improvements, and planned iterations. Scope and priorities should be agreed upfront.

It fits when the product is live and the internal team is overloaded, or when the previous vendor is unavailable. It is not a substitute for building a large new product from scratch — use MVP/SaaS for that.

Focus is safe change: reproduce the bug, check regressions, and keep a clear work status.

Why it works

  • Work with existing code

    Understand the system first, then change — no blind edits.

  • Priority-driven iterations

    Bugs, then user value, then debt — in the agreed order.

  • Transparent scope

    Each iteration has a clear task list and done criteria.

What's included

  • Current project analysis

    Stack, environments, risks, and critical scenarios.

  • Bug fixes

    Reproduce, fix, and check adjacent areas.

  • New features

    Small and medium product enhancements.

  • Integrations

    Connections to external APIs and internal services.

  • Performance

    Find bottlenecks and apply targeted optimizations.

  • Regular iterations

    Delivery cadence and backlog agreement for the period.

What you get

  • Fixed defects and/or delivered enhancements
  • Short change report
  • Risk and debt recommendations
  • Updated code in your repository/environment
Discuss a project

Ready to discuss — send a short note about the outcome you need.

How we work

  1. 01

    Onboarding

    Access, system overview, priority list.

  2. 02

    Scope agreement

    Iteration: what is in, what is out, acceptance criteria.

  3. 03

    Build and verify

    Changes, tests/smoke, prepare for release.

  4. 04

    Release and retro

    Ship, monitor, adjust the next cycle.

Technologies

  • Your current stack

    Work inside the existing codebase

  • Git / CI

    Controlled deliveries

  • Monitoring / logs

    Incident diagnosis

Pricing and timeline

A precise estimate depends on scope and constraints. Below are the factors that drive cost; I do not publish fixed prices without discussing the task.

  • Codebase and documentation condition
  • Task volume and urgency in the iteration
  • Whether on-call / SLA is required
  • Environment and access complexity
  • Integration volume
Discuss a project

FAQ

Do you take over someone else’s code?

Yes. I first assess readability, risk, and onboarding volume — that sets the start of work.

Is this a retainer or one-off tasks?

Both formats work. We lock a cadence: hour pack/iteration or separate tasks after estimate.

What if we need a large new module?

Large pieces are better as a separate scope (essentially a mini-MVP). Maintenance covers support and evolution.

Do you guarantee “yesterday” deadlines?

Urgent incidents get separate priority. I will not promise calendar dates without system access and reproductions.

Can this run alongside landing or SaaS work?

Yes: maintaining the current track and separate product work can run in parallel with clear boundaries.

Shall we discuss your project?

Tell me about the task. I will review the requirements and suggest a suitable approach.

Daniil Gerasimov
Web service maintenance and enhancements | Foundation Dev