Agency · White-Label
A growth-stage agency landed three new SaaS clients in a single quarter - but their in-house team was already at capacity. Here's how white-label senior engineering kept every deadline and every client relationship intact.
01 · The Challenge
The agency closed a record quarter - three SaaS contracts worth over $180k, all with 12-week delivery milestones. Their existing team of four developers was already committed to ongoing retainer work. Hiring full-time was off the table: too slow, too expensive, and they didn't want to expand headcount for project work.
They needed a senior engineer who could parachute in, integrate invisibly into their client-facing workflow, and produce production-quality code under the agency brand - with zero client awareness of the arrangement.
All three clients had contractual go-live dates within 12 weeks. No buffer.
Had to operate invisibly - same tools, same Slack, agency email signature.
Multi-tenant SaaS, Stripe billing, role-based access, third-party integrations.
Daily client standups at 9am AEST - presence and responsiveness were non-negotiable.
02 · The Approach
Week one was pure architecture: reviewing each client brief, mapping data models, and agreeing on a shared component library that could be forked across all three projects to eliminate rework. Everything after that was execution.
Reviewed all three client briefs simultaneously. Defined a shared monorepo with per-project Next.js apps, a common auth/billing layer, and a PostgreSQL schema template covering multi-tenancy and RBAC from day one.
Shipped auth (magic link + Google OAuth), Stripe subscription billing, admin dashboards, and the primary feature sets for all three products in parallel. Daily standups with agency PM kept alignment tight. Zero surprises for clients.
Wired each product to its third-party APIs (CRMs, webhooks, email providers). Set up end-to-end test suites with Playwright. Ran structured UAT with the agency's client contacts - no issues escalated to the engineering level.
Deployed all three products to production via CI/CD pipelines on AWS. Delivered full technical documentation, recorded Loom walkthroughs for the agency's ongoing team, and remained on-call for the first two weeks post-launch.
03 · Tech Stack
Every technology choice was made for reliability and long-term maintainability by the agency's internal team.
04 · Results
Every milestone landed on schedule. The agency invoiced all three clients in full.
We've worked with offshore devs before and it was always a pain to manage. Ammar was completely different - he joined our Slack, attended standups, and our clients had no idea he wasn't an in-house hire. The code quality was genuinely better than most locals we've interviewed. We're keeping him on retainer.
Let's see if I'm the right fit for your next sprint.
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