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B2B SaaS Technical Debt Paydown

Pay down technical debt

Refactors, test coverage, and dependency upgrades. Delivered alongside your roadmap.

Trusted by 80+ SaaS companies

Tech debt wins
by default

  1. Problem

    Cleanup work always loses to feature work.

    Implication

    Each new feature takes longer than the last.

  2. Problem

    Test coverage gaps make every change risky.

    Implication

    More bugs reach production, more hotfixes follow.

  3. Problem

    Outdated dependencies pile up into security and compatibility risk.

    Implication

    Upgrades become urgent instead of planned.

A debt paydown system that runs in parallel with shipping

Senior developers plan and review. Managed agents do the heavy lifting.

Refactors land as small reviewed PRs. Your team keeps shipping features.

2 week

from kickoff to first reviewed PR

80+

B2B SaaS products we've worked on

4.9

stars on Clutch

What we pay down

Concrete debt categories, shipped as reviewed PRs.

Refactors and re-architecture

Untangle hot files, extract shared logic, replace risky patterns. Behaviour preserved, tests added.

Test coverage backfill

Critical paths get test suites. Releases stop relying on luck.

Why teams choose Donux

...over hiring, agencies, or vibe-coding

Strategy + execution

Senior humans plan and review. Managed AI agents ship code fast. You get senior thinking and shipping speed without choosing between them.

Pay only for what ships

No retainer. No hourly billing. If the change doesn't land, you don't pay for it.

Experience

10+ years building products. 80+ SaaS companies. 15+ products launched. We know what works.

Senior review on every change

Agents draft, seniors review. Nothing untested or AI-slop reaches your main branch.

How debt paydown works in 3 steps

From audit to merged refactors, in parallel with feature work.

Codebase audit and debt inventory

1. Codebase audit

We index your repo and surface the debt that's actually slowing you down. Hot files, low coverage, brittle integrations, outdated deps.

Refactor and senior review

2. Agents refactor, seniors review

Managed agents do the mechanical work. Senior developers review behaviour preservation, tests, and architecture before anything reaches your branch.

Ship and track progress

3. Ship and track

Debt lands as small, reviewable PRs. Approved changes merge to your branch. You see coverage, complexity, and dependency freshness bend in the right direction.

Codebase audit and debt inventory Refactor and senior review Ship and track progress

What you get

A measurable, parallel paydown of the debt slowing you down.

Deliverables
  • Senior human review on every change before it reaches your branch.
  • Reviewed PRs that preserve behaviour and add tests.
  • Pay-as-you-ship pricing.
  • Every change lands in your repo. You own the code.
Magic Team Magic Team

Or pay down debt through Magic Team

A managed team of AI agents and senior humans that ships real code. Connect your repo and get features, MVPs, or bug fixes delivered as PRs, reviewed by Donux senior designers and developers.

Discover Magic Team
PR #142 Add invoice export Magic Team
1 + function exportInvoices(
2 +   format: 'pdf' | 'csv'
3 + ) {
Scanner Fabbro Sasha · reviewing

Our clients say

They consistently push the project forward. Their work helped achieve an increase in downloads and positive feedback from users.

Nikos Kottaropoulos

Nikos Kottaropoulos

CEO , Balanced

Creating our SaaS website right away helped us with a better final conversion rate.

Hernán Solima

Hernán Solima

COO , Fluida

Case studies

F.A.Q.

Who is this for?
B2B SaaS CTOs and founders who feel each new feature takes longer than the last. Teams that don't want to freeze the roadmap to clean up the codebase.
How do you avoid breaking things during refactors?
Behaviour-preserving changes only. Tests added before risky changes. Senior review on architecture and edge cases. Small PRs that are easy to revert.
Will this slow down our feature shipping?
No. We work in parallel. Your team keeps shipping features while we pay down the debt backlog.
What if we don't know what our debt is?
We start with an audit. Hot files, coverage gaps, dependency drift, and complexity hotspots surface the work that's actually slowing you down.
Can you handle large dependency upgrades?
Yes. Framework migrations, runtime upgrades, and library swaps. Done incrementally with smoke tests on every step, not as one giant PR.
How does pay-as-you-ship pricing work?
You're billed per merged PR, scoped before each batch. If a refactor doesn't pass review or doesn't land, you don't pay for it. No retainer, no hourly billing.
How do you access our codebase?
Read access only by default. We work in a sandboxed environment. NDAs and access scopes are agreed before the audit. Your code never leaves the boundary we agree on.
Is our code being fed to public AI models?
No. The managed agents run on enterprise infrastructure with zero data retention. Your code isn't used to train any model. Senior developers review every change before it reaches your branch.
How is this different from a traditional agency?
Agencies bill hours whether or not the work ships. We bill only for code that lands in your repo. If a refactor doesn't make it through review, you don't pay for it.
Who owns the code?
You do. The code lives in your repo from the moment it ships. No lock-in, no licensing strings.
What if we already have an in-house dev team?
We work alongside them. Your team keeps ownership of the high-judgement calls. We absorb the debt backlog that keeps slipping. Reviews and merges stay with you.
Can I pay down debt through Magic Team?
Yes! Magic Team is a managed team of AI agents and senior humans that ships real code. Connect your repo and get refactors, test coverage, and dependency upgrades delivered as PRs, reviewed by Donux senior developers.

We'll help you build the right product, faster

The first step is a quick chat.