About Shayan
My name is Shayan Ahmad. I have over 10 years of experience in senior software engineering, architecting polyglot microservices and highly scalable AWS DevOps infrastructure. Throughout my career, I have specialized in building robust, high-throughput backend systems and modern frontends for the fintech industry.
I have worked with language ecosystems like Java (21+), Go (GoLang), and Python (3+), alongside modern frameworks such as Spring Boot, FastAPI, NextJS, and Kafka. As an AWS Certified Solutions Architect, I am passionate about optimizing cloud infrastructure, eliminating performance bottlenecks, and enforcing rigorous automated testing (using JUnit5, WireMock, and Playwright) to guarantee zero-regression product delivery.
I can help you with:
- Designing and implementing scalable microservices architectures (SOA, CQRS, SAGA patterns).
- Cloud migrations, infrastructure optimization, and AWS cost reduction.
- Performance tuning (e.g., optimizing logic from O(N^2) to O(N) to slash API latency).
- Full-stack product delivery using Go, Java, Python, and NextJS.
- Setting up robust CI/CD pipelines, DevContainers, and end-to-end automated testing harnesses.
Whether you need to build a high-performing fintech stack from scratch, overhaul legacy systems, or bridge the gap between engineering and DevOps, I bring a proven track record of accelerating product velocity and reliability.
English
Native or bilingual
Can work on-site
London (up to 50km)
Experience
- FONOASenior Software Engineer (Returns Team)April 2026 - July 2026 (3 months)London, England, United KingdomWorking on Returns taxation product as Go (GoLang) developer along with Next JS (React) full stack. Responsible for delivering projects end to end.• - Delivered end-to-end requirement of increasing capability of Tax Returns product to detect and shift deadlines when they land on non-business days. This cleared out a lot of confusion on the client's end.
- FINTECH INDUSTRYSenior Software Engineer (Core-Growth, Platform, FinOps)May 2023 - March 2026 (2 years and 10 months)London, England, United Kingdom• ● Design and architected the integration of identity verification decision trees that imbursed £6.9 million in the first month further saving 68 hours in customer operations overhead.• ● Reduced PR validation time by ~25–35% and cut flaky test failures by spearheading the integration of JUnit 5 and WireMock for deterministic service isolation.• ● Accelerated onboarding and reduced PR review rework by ~40% by standardizing Spring Boot/Java conventions and enforcing them in CI.• ● Shortened partner go-live timelines by 1–2 weeks and met B2B SLAs by delivering partner-facing Python 3.12/FastAPI APIs with clear contracts.• ● Reduced manual release testing by 12–16 hours per cycle and expanded automated coverage 2.3x–5.7x by building an E2E QA harness replicating customer journeys e2e.• ● Reduced post-release hotfixes and UI regressions by architecting an end-to-end Playwright testing framework for the Python backend.• ● Reduced mean document generation debug time by >50% by re-architecting from Lambda to a unoserver sidecar, improving observability and local parity.• ● Saved £7,000 in external vendor fees and hardened external-facing surfaces by executing focused penetration testing and prioritizing fixes into sprints.
- FreelancePhotographerMay 2014 - Today (12 years and 3 months)Karachi, Pakistan- I was the founder of the photography society in my university.- I also do various other forms of photography.
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Education
- AWS Certified Solutions Architect - Associate - SAA-C02AWS Certified Solutions Architect - Associate - SAA-C02
- BSNational University of Computer & Emerging Sciences(FAST-NUCES)2016BS