FINANCIAL SYSTEMS
Architecting secure, resilient cloud systems for banking, payments, and capital markets.
BASED IN LONDON//BUILDING AT THE EDGE OF FINANCE + TECHNOLOGY
PANAYIOTIS-ORESTIS “OTIS” ANTONIOU
I design systemsthat move industriesforward, responsibly.
Senior Solutions Architect at AWS, focused on global financial services. I work where cloud architecture, generative AI, and sustainability meet.
PROFILE.EXE
$ whoami
OTIS ANTONIOU$ focus --list
- FINANCIAL SERVICES
- GENERATIVE AI
- SUSTAINABLE CLOUD
$
[ 01 / ABOUT ]
Architecture is
a human discipline.
I help teams make high-stakes technology decisions clearer, safer, and more sustainable.
My work spans financial services architecture, event-driven systems, generative AI, and sustainable cloud design. I care about the trade-offs behind the diagram: reliability, security, operability, cost, and environmental impact.
Before AWS, I studied Computer Science at Lancaster University and built an early foundation in financial analysis and technical communication.
08AWS ARTICLES
04PART SUSTAINABILITY SERIES
2020JOINED AWS
47K+AWS BLOG VIEWS
[ 02 / WORK ]
What I work on.
Deep technical work, communicated clearly.
GENERATIVE AI
Turning emerging AI capabilities into pragmatic, production-minded architectures.
SUSTAINABILITY
Improving resource efficiency and treating sustainability as an architectural quality.
TECHNICAL STORYTELLING
Making complex systems legible through writing, talks, workshops, and diagrams.
CAREER.LOG
Senior Solutions Architect · Global Financial Services
Amazon Web Services · London
Shape cloud strategy and target architectures for global financial services, with a focus on secure migration, modernization, generative AI, and resilient event-driven systems.
Senior Solutions Architect
Amazon Web Services · London
Led architecture discovery, business-case development, and technical validation; contributed to financial-services strategy while mentoring and interviewing.
Solutions Architect
Amazon Web Services · London
Turned complex requirements into secure, operable AWS architectures and helped teams plan migrations from on-premises estates.
Associate Solutions Architect
Amazon Web Services · London
Built breadth across cloud architecture, financial services, sustainability, technical demonstrations, and public technical writing.
[ 03 / TALKS ]
On stage
& in the room.
Sessions and programmes that turn technical depth into useful, practical conversations.
01
From Trigger to Execution: the journey of events in AWS Lambda
AWS Summit London · ExCeL London
A practical session on event-driven systems, from event sources and routing to orchestration, observability, and production trade-offs.
02
Generative AI in Financial Services
AWS London · 60 Holborn Viaduct
A specialist-led look at generative AI trends, practical applications, and the architecture behind real-world financial services use cases.
03
Transforming Financial Services
AWS London
Helped shape and deliver a programme spanning generative AI, data architecture, resilience, compliance, and hands-on technical learning.
[ 04 / WRITING ]
Ideas, made
practical.
Eight pieces published across the AWS Architecture and Smart Business blogs, with more than 47,000 total views.
0110 AUG 2021
SUSTAINABILITY · COMPUTE
Optimizing your AWS Infrastructure for Sustainability, Part I: Compute
A practical guide to making compute workloads more resource-efficient through better utilization, scaling, and architecture choices.
READ ON AWS
0222 SEP 2021
SUSTAINABILITY · STORAGE
Optimizing your AWS Infrastructure for Sustainability, Part II: Storage
Design patterns for more efficient data lifecycles, storage tiers, compression, and reducing unused capacity.
READ ON AWS
0325 OCT 2021
SUSTAINABILITY · NETWORKING
Optimizing your AWS Infrastructure for Sustainability, Part III: Networking
Ways to shorten the distance data travels, reduce payload sizes, and design efficient network paths.
READ ON AWS
0417 AUG 2022
SUSTAINABILITY · DATABASES
Optimizing your AWS Infrastructure for Sustainability, Part IV: Databases
Recommendations for managed, right-sized, purpose-built databases with efficient queries and performance.
READ ON AWS
0504 OCT 2024
FINANCIAL SERVICES · OPEN BANKING
How Banfico built an Open Banking and PSD2 compliance solution on AWS
A reference architecture for a secure, resilient open banking compliance platform built with managed services.
READ ON AWS
0626 JUN 2025
GENERATIVE AI · SUSTAINABILITY
Simplifying sustainability reporting using AWS and generative AI in banking
An automated approach to extracting, processing, and validating sustainability data from corporate reports.
READ ON AWS
0707 NOV 2022
SUSTAINABILITY · SMART BUILDINGS
How Small and Medium Businesses Can Lower Emissions Through Green Buildings
Five areas where data, cloud services, and smarter operations can support more sustainable buildings.
READ ON AWS
0818 SEP 2023
RETAIL · SUPPLY CHAIN
Revolutionize SMB Retail Operations with Digital Supply Chain Management
How connected data, automation, and cloud tools can help smaller retailers build more resilient supply chains.
READ ON AWS
[ 05 / CONNECT ]
Let’s compare
notes.
If you’re working on complex cloud systems, financial services, responsible AI, or sustainability, I’m always interested in a thoughtful conversation.