Hire SaaS developers when your team knows what to build but lacks engineers who have already dealt with tenants, plans and enterprise sign in. We place senior engineers who have shipped multi-tenant B2B products. They work in your repository, join your standups, follow your review rules, and start after a short intro call about the role.
If you need a whole product built or rebuilt rather than extra people, our SaaS development services page covers that model.
What we vet SaaS engineers for
A strong backend engineer can still get tenancy wrong. Most SaaS incidents we have seen start in the areas below, so our technical interviews spend their time there.
- Multi-tenancy. Candidates compare a shared schema, a schema per tenant and a database per tenant, say when each fits, and show how they enforce tenant filters. We ask how they would find a query that leaks rows across tenants.
- Data isolation. PostgreSQL row-level security, tenant-scoped caches and background jobs, file storage per tenant, and tests that prove isolation still holds after a change.
- Authentication and SSO. Sessions and tokens, SAML and OIDC with a customer’s identity provider, roles per tenant, and what breaks when one user belongs to two accounts.
- Billing integrations. Subscriptions, seats and usage metering, webhooks that arrive twice or out of order, and keeping plan limits in code in step with the billing provider.
- Observability. Logs, metrics and traces tagged by tenant, so support can tell quickly whether a problem affects one customer or all of them.
- Migrations without downtime. Expand and contract schema changes, batched backfills that resume after a failure, and one migration applied across many tenant schemas.
Candidates also walk us through a SaaS product they worked on: what they owned, what went wrong, and what they changed afterwards.
What a SaaS developer works on in the first weeks
The first tasks depend on your backlog, but these come up often:
- Reading the tenancy and auth code, then writing down every place where isolation depends on a filter someone could forget.
- Adding tenant context to logs and traces so production issues can be tied to one account.
- Fixing a billing webhook handler so retries and duplicate events never charge a customer twice or lock them out.
- Adding SSO for the first enterprise prospect, or moving a hand-rolled SAML setup to a maintained library.
- Writing the migration runner or backfill script for a schema change that has to reach every tenant.
- Shipping features from your board, with tests and a preview environment from the first pull request.
Engagement models
| Model | What you get | Fits when |
|---|---|---|
| Dedicated developer | One senior SaaS engineer working full time in your team | You have a tech lead and a backlog and need one more engineer with SaaS experience |
| Team extension | Several engineers joining your existing team under your lead | A launch or an enterprise deal needs more capacity than one hire gives |
| Dedicated team | A team with its own lead that owns delivery of an agreed scope | You need a product, a module or a rebuild delivered, not only extra capacity |
Team extension works like our IT staff augmentation: you direct the work, and we handle contracts, payroll and replacement. For the third model, see how we run a dedicated development team.
Rates
SaaS engineers are priced in the $50 to $150 per hour band. Where a role falls depends on seniority, the stack, overlap with your working day, contract length and the number of seats. We quote each role after a short call about the brief.
Proof from our SaaS work
A European Series-B B2B SaaS had outgrown its shared-table data model. Our engineers moved several hundred live tenants to per-tenant PostgreSQL schemas with a resumable backfill and an atomic provisioning API. Tenant provisioning went from several hours to under five minutes, and p99 query latency improved by about 55%. Read the multi-tenant rebuild case study.
Need backend engineers for work that is not SaaS specific? See hire backend developers. Ready to discuss a role? Contact us with the stack and the number of seats you need.
