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B2B SaaS Technical Debt Paydown

Pay down technical debt in parallel

Refactors, test coverage, and dependency upgrades. Shipped in parallel with your feature work.

Trusted by 80+ SaaS companies

Why technical debt
stays unpaid

  1. Problem

    Cleanup work always loses to feature work.

    Implication

    Velocity decays. Every new feature costs more than the last.

  2. Problem

    Refactors require focus the team can't free up.

    Implication

    Safe small improvements get blocked by bigger missing ones.

  3. Problem

    Test coverage gaps make every change risky.

    Implication

    Releases slow down. Hotfixes become routine.

  4. Problem

    Outdated dependencies pile up into security and compatibility risk.

    Implication

    Forced upgrades land at the worst possible time.

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.

80+

B2B SaaS products we've worked on

10+

years building B2B SaaS products

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.

Dependency upgrades

Framework, library, and runtime upgrades. Done incrementally, with smoke tests on every step.

Dead code and config cleanup

Unused features, dead branches, stale flags, and abandoned config removed safely.

Why teams choose Donux

...and not generic product design agencies or freelancers

Experience

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

SaaS specialization

We focus on B2B SaaS and PLG. Complex flows, product analytics, feature adoption. This is our daily work.

Product mindset

Pretty screens don't matter if they don't solve problems. Like a PM, we balance desirability, feasibility, and viability.

Every startup stage

We've worked with companies from first customers to rapid growth. Our decisions are backed by what we learned on those projects.

How debt paydown works in 5 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.

Prioritized paydown plan

2. Prioritized paydown plan

Each debt item scored by risk, blast radius, and unlock value. You pick what's worth doing this month.

Refactor and senior review

3. Agents refactor, seniors review

Managed agents do the mechanical work. Senior developers review behaviour preservation, tests, and architecture.

Small PRs frequent merges

4. Small PRs, frequent merges

Debt lands as small, reviewable PRs. Easier to QA, easier to revert, easier to keep shipping in parallel.

Track velocity and risk

5. Track velocity and risk

Dashboards on coverage, dependency freshness, and hot-file complexity. You see the debt curve bend.

Codebase audit and debt inventory Prioritized paydown plan Refactor and senior review Small PRs frequent merges Track velocity and risk

What you get

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

Deliverables
  • Codebase audit with prioritized debt inventory.
  • Reviewed PRs that preserve behaviour and add tests.
  • Test coverage on critical paths.
  • Dependency upgrades shipped incrementally and safely.
  • Dashboards on coverage, complexity, and dependency freshness.
  • Senior review on every refactor before merge.
Magic Team Magic Team

Pay down debt through Magic Team

Magic Team is a managed team of AI agents and senior humans that ships real code. We deliver behaviour-preserving refactors as reviewed PRs, in parallel with your team's feature work. Pay only for code that ships.

Discover Magic Team
PR #142 Add invoice export Magic Team
1 + function exportInvoices(
2 +   format: 'pdf' | 'csv'
3 + ) {
Scanner Fabbro Sasha · reviewing
Need new features shipped too? Extend your dev team

Case studies

F.A.Q.

Who is this for?
B2B SaaS CTOs and founders who can feel velocity decaying. 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. Magic Team works in parallel. Your in-house team keeps shipping features while we chip at the debt.
What if we don't know what our debt is?
We start with an audit. Hot files, coverage gaps, dependency drift, and hot-spot complexity 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, never as one big-bang PR.
What if a refactor doesn't pan out?
You don't pay for it. Pay-per-ship means abandoned or rejected work costs nothing.

We'll help you build the right product, faster

The first step is a quick chat.