Good fit
- You have a lead and a backlog, but no bandwidth.
- One skill is missing: custody, matching or AML rules.
- A launch date moved and the team needs depth now.
- Hiring senior crypto engineers in-house is too slow.
Engagement model
Senior crypto engineers,
inside your own team.
You keep the roadmap, the sprints and the merge button. We add EU-based engineers who already know exchanges, wallets, payment rails and AML rules. No handover theatre. No agency layer between you and the work.
- EU-based engineers
- GDPR-compliant delivery
- MiCA-ready architecture
Roles
Skills you can add to the squad
Digital-asset work fails on the seams. So we staff the seams: chain, ledger, payments and the rules that bind them.
-
01
Blockchain engineers
Node operations, signing paths and on-chain integrations. They have shipped this before, on live money.
- EVM and UTXO chains
- MPC and HSM signing
- Deposit and sweep logic
-
02
Backend engineers
Ledgers, matching, APIs and queues. They write services that stay correct when traffic spikes.
- Double-entry ledgers
- Event-driven services
- Load and chaos testing
-
03
Payments engineers
Card, SEPA and on-ramp flows. They know why a payment fails before the log tells them.
- PSD2 and SCA flows
- PSP integrations
- Reconciliation jobs
-
04
Compliance engineers
Rules turned into code and evidence. Screening, Travel Rule and audit trails your reviewer can read.
- AML rule engines
- Sanctions screening
- Evidence and reporting
-
05
Security & DevOps
Key handling, secrets, pipelines and alerts. They harden what the team already built.
- Key custody reviews
- CI/CD hardening
- Runbooks and on-call
-
06
QA & release
Test depth for money paths. Nothing ships on a hunch, and every fix arrives with a case.
- Automated regression
- Settlement test suites
- Release checklists
Ramp-up
From brief to first merge
A new engineer should ship something small in week one. That is the test we hold ourselves to.
Need a whole squad instead? Compare it with our dedicated development teams.
- 01
Brief
Days 1–3
You send the stack, the roadmap and the gap. We agree the role and the seniority bar.
- 02
Shortlist
Within 2 weeks
You meet vetted candidates. You interview them yourself, with your own bar and your own tasks.
- 03
Onboarding
First 2 weeks
Access, context and a first shipped change. A TrustChange lead handles the paperwork side.
- 04
Steady state
Ongoing
They work in your sprints, your tools and your review process. Scale up or down on 30 days.
Comparison
Pick the model that fits the work
Augmentation is one of four ways to buy engineering from us. Here is how they differ in practice.
| Model | Who directs the work | Billing unit | Best when |
|---|---|---|---|
| Staff augmentationthis page | Your team lead | Per engineer, monthly | You own the plan and need senior depth fast |
| Dedicated team | Shared with our lead | Per squad, monthly | A long roadmap and a steady release cycle |
| Fixed-scope build | TrustChange | Per milestone | Scope is settled and the date matters most |
| CTO advisory | Your founders | Per advisory block | Architecture and hiring calls before you build |
Fit
When augmentation is the right call
We say no when the model does not fit. It saves both sides a quarter.
Wrong fit
- Nobody internally can review or merge the work.
- The product scope is still unwritten. Start with advisory.
- You want one fixed price for a whole platform.
- You need a licence opinion. We are engineers, not lawyers.
Questions
What buyers ask first
Five answers up front. Bring the rest to the call.
How fast can an engineer start?
Most roles are filled inside three to four weeks. Common backend and blockchain profiles move faster than niche compliance ones.
Do we interview the engineers ourselves?
Yes. We screen first, then you run your own interview. You approve every person before they join your squad.
What if the fit is wrong?
Tell us in the first month. We replace the engineer at our cost and carry the handover. That is part of the deal.
Who owns the code and the IP?
You do. Work lands in your repositories under your process. Contracts assign the IP to you from day one.
How do you handle data and access?
Engineers work under GDPR-aware terms and your access rules. Keys and production data stay in your control.
Tell us which skill is missing
Send the role, the stack and the date. We come back with profiles and a start plan. No demos required.