Banking-as-a-Service platform
Built a cloud-native BaaS layer handling $40M+ in monthly transactions, with built-in server-side tracking the growth team uses for acquisition analytics.
Client
Series B Fintech
Headline metric
11-week launch
Tech stack
Next.js · AWS · Postgres · Kubernetes
The situation
A Series B fintech needed to launch a Banking-as-a-Service platform to let other companies embed financial products (accounts, cards, payments) into their apps. They had a 12-week board deadline, an existing legacy backend that couldn't handle the transaction volume, and no in-house growth tracking infrastructure. Three separate vendors (engineering, creative, growth) would have meant three contracts, three timelines, and three integration points — a recipe for missing the deadline.
What we did
- Deployed a dedicated Zelvante Tech squad (1 tech lead, 4 senior engineers, 1 DevOps) within 14 days of contract signing
- Architected a cloud-native BaaS layer on AWS with Kubernetes for auto-scaling, handling $40M+ in monthly transactions
- Built server-side tracking (GTM Server + GA4 + Mixpanel) into the platform from line one — not as an afterthought
- Zelvante Growth worked in parallel to structure the acquisition funnel before launch, so tracking was ready day one
- Zelvante Media produced a 60-second launch film and product walkthrough video for the go-to-market
- Used the same Account Director across all three divisions to eliminate cross-vendor communication lag
What we shipped.
11 weeks
from contract to production launch
$40M+
in monthly transactions handled
99.97%
uptime in first 6 months
3.2x
faster than the previous vendor quote
How it shipped.
Discovery
Week 1
Technical audit, architecture design, squad selection
Foundation
Week 2-4
Core BaaS layer, auth, payment rails, AWS infrastructure
Build
Week 5-9
API endpoints, dashboard, server-side tracking, QA
Launch
Week 10-11
Load testing, security audit, production deployment
“Zelvante replaced three separate vendors with one squad. Our launch timeline went from 'maybe Q4' to 'shipped in 11 weeks'. The developer-to-editor handoff alone saved us a month of back-and-forth.”
[Client Name]
CTO, Series B Fintech
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