Backend & Systems Engineer - Fintech and Trading Systems

Hi, I’m Kai, a backend-focused software engineer with a cybersecurity background, working on data-intensive and performance-aware systems in fintech and trading contexts.

My core experience is in Python and Go, building backend services, APIs, and infrastructure where correctness, scalability, and latency trade-offs matter. I enjoy working close to system boundaries; understanding how data flows, how failures happen, and how systems behave under real-world load.

I’m especially interested in trading systems, market data processing, and real-time software, and I’m gradually building toward quantitative development roles.

Based in the UK

Kai Constantine

Tech Stack

Languages: Go, Python, SQL, JavaScript, TypeScript

Tools & Platforms: AWS, Docker, Kubernetes, gRPC, PostgreSQL, Redis

Portfolio

View all
  • Apple Music CLI - CLI for exporting and analyzing playlist/library data.
  • Enchiridion - 2D dungeon crawler focused on gameplay systems and low-level control.
  • DuskHollow - Text-based RPG with progression and branching interactions.

Github Contributions

 

Work Experience & Education

Self-Employed Software Engineer

Self-employed

Current

Currently working on my own financial software.

Cyber Security Programming Tutor

University of Warwick

October 2023 - July 2024

Delivered 10+ interactive programming tutorials to 50+ undergraduate and postgraduate students. Facilitated hands-on learning of algorithms and data structures, improved student engagement and comprehension.

Cyber Attack and Defence Internship

Forvis Mazars Group

July 2023 - August 2023

Collaborated on four pentesting projects, including IoT firmware analysis and malware evasion in Go. Wrote TDD-style unit tests and integrated checks into Git-based reviews; reduced regressions. Applied secure coding and testing principles relevant to high-reliability systems. Delivered internal tooling/docs; presented findings to stakeholders, aligning security with engineering priorities.

Cyber Security Graduate

University of Warwick

October 2021 – July 2024

Graduated with Upper Second Class Honours. Focused on the intersection of software engineering and security, with modules in Data Structures & Algorithms, Secure Systems Implementation, and Networks & Cyber Defence. Gained experience applying secure coding practices to web applications, APIs, and backend architectures.

A-Levels

Hurstpierpoint College

September 2019 – July 2021

Achieved A*, A*, A, B in Business Studies, Geography, Computer Science, EPQ.