Joud Mostafa

S

Backend Engineer at Hollow Labs · Kafka, Java

Hollow Labs
Dubai, UAE · GST (UTC+4)
1+ years experience
Hebrew University of Jerusalem
English, Arabic, German
Open to work
Messaging unavailable

Overview

Based in Dubai. I work on payments infrastructure at Hollow Labs. Moved 78% of payments platform traffic off a legacy monolith without a customer-facing incident. Most at home with PCI DSS and gRPC. Jazz piano, badly.

Good reasons to reach out
  • Roles in payments infrastructure
  • Questions about payments infrastructure
  • Thoughtful intros to people in my field
  • Second opinions on gRPC decisions
Please don't message about
  • Generic networking requests
  • Requests to fix your code for free

Travels often; replies within 48 hours

Skills
gRPCJavaPCI DSSKafka
Open to workLooking for a role
closes in 3 months

Staff Backend Engineer roles in banking - Dubai or remote

Target roles
Staff Backend Engineer
Level
Staff / Principal
Industries
Climate tech, Developer tools
Work mode
Remote
Available
30 days notice
Work authorization
Authorized to work in the UAE
What I'm looking for
Early-stage company (Series A) where payments infrastructure is core to the product.
Not interested in
Night shifts

1 years in payments infrastructure. Strongest at PCI DSS and Kafka. Open to the right conversation.

Dubai, UAE · remote OKpci dssgrpckafka
Open

Experience

  1. Backend Engineer
    Oct 2025 - Present
    Hollow Labs · 1 yr · Full-time · Dubai, UAE
    • Cut p99 latency on the payments platform services from 577ms to 59ms.
    • Took payment success rates from 93.7% to 97.5%.

Projects

Side project: a reading list app
2025

Built with Java and PCI DSS. 4672 people used it last year.

Write-up: payments infrastructure in practice
2024

A long-form guide to payments infrastructure for people starting out.

References

No references yet.

Education

  1. Hebrew University of Jerusalem
    BSc, Electronics and Communication
    2021 - 2025

Details

Compensation expectations
What they are targeting for their next role.
Visible to connections
Direct contact details
Direct email and a scheduling link.
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