Software takeover · fixed-price assessment · EU contract

Your developer left. The system still has to run.

We take over business-critical custom software that nobody on your side fully understands anymore: assess it in 10 working days, make it stable, and keep it running under a monthly agreement.

Send us the system What the assessment covers

Access under your NDA. No commitment beyond the assessment. You keep the report whatever you decide.

Assessment log · example10 working days
  1. Day 1Read access to repo, servers, DB · interviews booked
  2. Day 2backup.restore_test() · no restorable backup → fixed
  3. Day 3Deploy from clean machine · 2 undocumented steps found
  4. Day 5deps.audit() · 14 outdated · 3 known CVEs
  5. Day 7Credentials map · 6 services, 2 still in ex-developer's name
  6. Day 10Readout · risk register, plan, fixed price for step 2
Illustrative · findings vary by system · every item written down
10 daysfrom access to a written assessment
€5–10kfixed price for the assessment
1 leadnamed engineer who knows your system
1 business daystandard incident response; 24/7 by agreement

When companies call us

Usually one of these eight situations. Often two at once.

  • The only developer resignedthe knowledge walked out of the door
  • The vendor disappeared or stopped answeringinvoices paid, tickets open
  • The current vendor keeps missing deadlinesevery release breaks something
  • Nobody can explain how the system worksno documentation, no tests
  • The system is unstableoutages, slow pages, data errors
  • You inherited it through an acquisitionand need to know what you bought
  • It needs modernisationold framework, unsupported libraries
  • You no longer want to run it in-housebut cannot switch it off

How a takeover works

Three steps. Stop after any of them.

Each step has its own price and its own deliverable. Nothing is bundled, nothing is hidden in the monthly fee.

Rules we work by

  • Backups and restore are verified before anything else is touched
  • Every change goes through version control and a documented deploy
  • Credentials move into your name, never ours
  • Risky changes are agreed with you first, in writing
  • Everything we learn goes into documentation you keep
  1. 1
    Takeover assessment 10 working days · €5–10k

    We read the code, infrastructure and data, talk to whoever still knows anything, and write down what the system does, where it will break next, and what it costs to keep alive.

  2. 2
    Stabilisation 4–12 weeks · €20–80k

    The fixes from the assessment, in order of risk: backups and restore, deployment from a clean machine, monitoring, the critical bugs, security patches, documentation.

  3. 3
    Ongoing engineering monthly · €3–8k

    A named lead engineer, agreed hours for changes, and a response time for incidents: within one business day as standard, faster or 24/7 by agreement.

The assessment

A document you can act on, with us or with anyone else

→

What you get

  • System map. Components, integrations, data flows, external services and who pays for them.
  • Risk register. What will break next, how likely, how bad, and what it costs to prevent.
  • Operational check. Can it be deployed from scratch? Are backups restorable? Who holds the credentials?
  • Code and dependency review. Outdated libraries, known vulnerabilities, parts nobody should touch without tests.
  • Plan and price. A stabilisation plan in order of risk, a fixed price for step 2 and a monthly figure for step 3.
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What we need from you

  • Read access to the repository, servers and any documentation. We sign your NDA first.
  • One or two hours with the people who use the system every day.
  • Whatever is left from the previous developer or vendor: tickets, emails, invoices, contracts.
  • A decision-maker for a 60-minute readout at the end.
PHPJavaNode.jsPythonGoReact / AngularAWS / KubernetesWooCommerce / Magento

Proof, not promises

What we have done before

Stabilisation

Income · P2P lending platform

Inherited frontend backlog and broken release cycles. Our senior engineer restored releases and fixed investor-facing bugs; cooperation continued four years.

10 daysbacklog cleared
~18%faster pages
Legacy replacement

Public-sector financial institution

Old loan and guarantee system replaced, all data migrated. Several of our engineers later joined the client's own team.

10senior engineers
2 yearsto launch
Delivery lead's experience

Inherited e-commerce platforms and incident response

Before Bonsay, our delivery lead took over custom WooCommerce platforms from departed vendors and ran the response to a live checkout compromise: containment, forensics, remediation, hardening. Client names on request.

Send us the system

Describe it in a few sentences.

No access needed yet. We reply within one business day with questions and, if it fits, a fixed price for the assessment.

Prefer email? gleb@bonsaytech.com · WhatsApp +372 5306 0026