How SFTP Gateway Powers Automated Data Processing for Global Finance

A fintech company processing client data files through AWS Lambda needed reliable, automated file ingestion to meet enterprise SLA commitments across Europe and North America.

OVERVIEW

File Automation for Fintech + SFTP Gateway

A fintech company helping global enterprises detect and prevent payment errors through AI-powered spend analytics needed a bulletproof automated file ingestion system. Their platform processes uploaded client data files through AWS Lambda functions to deliver real-time financial insights—making file transfer reliability mission-critical to their entire service.

Operating across Europe (~120 users) and North America (~40 users), they required infrastructure that could meet enterprise SLA commitments while seamlessly integrating SFTP uploads with cloud-native AWS processing workflows. Thorn Technologies implemented SFTP Gateway to create a fully automated pipeline from client uploads to Lambda-triggered analytics, enabling the company to document uptime guarantees and scale its automated processing across multiple regions without manual intervention.

~2,000
Active users · Europe
~1,000
Active users · North America
2
AWS regions, fully independent
The Challenge

The problem

Four architectural gaps were blocking enterprise growth.

01

Single point of failure

Each region ran on a single EC2 instance with no failover capability, putting SLAs at risk.

02

SLA documentation

Enterprise clients demanded formal uptime guarantees and high availability architecture they could review.

03

Local disk dependency

Files were stored locally before syncing to S3, creating data loss risk and processing delays.

04

Scalability constraints

The aging architecture couldn’t support horizontal scaling with load balancers and auto scaling groups.

What we built

The solution

A cloud native rebuild that preserved every existing workflow while removing the single points of failure.

✓
Direct to S3 streaming
Files stream straight to S3, eliminating local disk dependency and the delays that came with it.
✓
Cloud native HA design
Redundant instances behind load balancers remove the single point of failure in each region.
✓
Preserved automation
Existing AWS Lambda processing workflows were kept intact with zero rework for the customer.
✓
Multi region independence
Europe and North America run as fully independent stacks for isolation and resilience.
✓
Event driven integration
New object events trigger Lambda automatically, keeping processing real time.
✓
Performance optimization
Throughput tuned for peak ingestion windows without over provisioning.
✓
Seamless migration
Cutover was staged to avoid downtime, with rollback available at every step.
The results

The results

A resilient, documented architecture the team can now stand behind in enterprise deals.

0

Processing delays from local disk

2x

Regional redundancy, HA per region

100%

Of Lambda automation preserved

Operational gains
Strategic gains
The Team

The team behind the build

Thorn Technologies, based in the Washington and Baltimore metro, builds cloud file transfer software for Fortune 500 teams across fintech, healthcare, retail, and beyond. We design for the uptime and compliance bar that enterprise deals demand.

Have questions or want a demo?

Talk to the team that would run your migration.

info@thorntech.com

(410) 429-0255

Ready for a file transfer layer you can stand behind?

See how SFTP Gateway would fit your architecture and SLAs.