Core Banking Modernisation↗ On Track API Gateway v3.2↗ Released Zero-Trust Rollout↗ Phase 2 Cloud Migration↗ 74% DevOps Maturity Score↗ 4.1 / 5 Incident Response SLA↗ 98.6% Core Banking Modernisation↗ On Track API Gateway v3.2↗ Released Zero-Trust Rollout↗ Phase 2 Cloud Migration↗ 74% DevOps Maturity Score↗ 4.1 / 5 Incident Response SLA↗ 98.6%
Technology Division

Building the
infrastructure
of modern finance.

We engineer the systems that power Windy City Banking — from core transaction processing to next-generation digital products. Reliable, secure, and built to last.

Our Work Join the Team
About
Technology at the core
of every transaction.

Windy City Banking's Technology Division was established in 2009 to bring critical engineering capability in-house. What started as a team of 40 engineers building internal tooling has grown into a 340-person organisation responsible for every layer of the bank's digital infrastructure.

We operate across Chicago, New York, and a remote-first engineering hub, shipping software that processes millions of transactions daily, serves retail and commercial customers across 14 states, and underpins the bank's growth into embedded finance.

Our engineering culture is grounded in operational rigour. We maintain strict reliability standards — a 99.98% uptime target across all production systems — while moving quickly on the product innovation that keeps Windy City competitive in a rapidly changing market.

We are a principal engineering organisation: individual contributors lead technical strategy, not just execution. Senior engineers hold the same weight in roadmap decisions as product and business leadership.

Leadership
CTO
Marcus Vane
Sets technical vision and oversees all engineering, platform, and product development across the division.
CISO
Sonny Hermann
Leads enterprise security strategy, zero-trust architecture, and regulatory compliance across the Technology Division.
VP Engineering
Priya Nair
Responsible for engineering delivery, hiring, and the internal developer platform that supports 340+ engineers.
Head of Platform
James Okoro
Owns cloud infrastructure, SRE practice, and the observability stack that keeps production systems reliable.
Solutions
What we build.

From the ledger to the last mile, our engineering teams own the full stack of technology that powers Windy City Banking.

01
Core Banking
We maintain and modernise the transaction engine that clears millions of operations daily. Our ISO 20022 migration programme is on track for full compliance ahead of the 2026 deadline, and we run a parallel processing architecture that eliminates batch windows entirely.
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02
Platform Engineering
Our internal developer platform abstracts Kubernetes and cloud primitives behind a self-service portal, enabling teams to provision, deploy, and observe services in minutes. We run multi-region active-active on AWS with a full GitOps delivery pipeline and golden-path templates for every service archetype.
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03
Security & Compliance
Zero-trust network access, real-time threat detection via a centralised SIEM, and a dedicated red team that runs continuous adversarial simulation. We hold PCI-DSS Level 1, SOC 2 Type II, and FFIEC CAT certification, with an active programme to achieve ISO 27001 by Q3 2026.
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04
Digital Products
Consumer mobile apps for iOS and Android used by 2.4 million customers, a commercial banking portal, and a suite of open banking APIs serving 60+ fintech partners. Our customer identity platform handles 35M authentication events per month with sub-100 ms P99 latency.
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340+
Engineers
99.98%
Uptime
18M
Transactions / day
12
Products in production
Careers
Work on problems
that actually matter.

We're a principal engineering organisation — senior engineers own technical direction, not just execution. We offer hybrid working from Chicago and New York, with a competitive remote option for most roles. No open-plan noise, no stack ranking.

Senior Platform Engineer
Platform Engineering Bodø / Remote
Application Security Engineer
Security & Compliance Bodø
Senior iOS Engineer
Digital Products Fauske / Remote
Data Engineer — Core Banking
Core Systems Saltdal
Engineering Manager, Platform
Platform Engineering Bodø
See all openings
Contact
Get in touch.
Office
Windy City Banking
Technology Division
151 N. Franklin Street, Suite 2200
Chicago, IL 60606
General Enquiries
Security Disclosures

We're always open to conversations with engineers, security researchers, and fintech partners. If you're working on something interesting in banking infrastructure or want to explore a collaboration, reach out directly to our team.

For press and media enquiries, please contact our corporate communications team at press@windycitybanking.com.

Responsible security disclosure is important to us. Our security team reviews all incoming reports and responds within two business days.