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Christopher Little
Verified Expert in Engineering
Artificial Intelligence (AI) Developer
London, United Kingdom
Toptal member since October 9, 2017
Bio
After earning a first-class bachelor’s degree and a top distinction master’s degree in Computer Science from the University of Cambridge in the UK, Christopher went on to build two tech companies from the ground up. In addition to his technical expertise, Christopher uses his ability to quickly learn and understand client needs when managing and developing projects.
Portfolio
Startup Founder
Artificial Intelligence (AI), Node.js, Pulumi, OpenAI API, JavaScript, SQL...
PowerX.ai
Amazon RDS, PostgreSQL, AWS Lambda, Docker, TypeScript, Python, Terraform...
GSMA
Docker, TypeScript, Twilio, Python, JavaScript, SQL, Ubuntu, AWS Lambda, React...
Experience
- React - 10 years
- TypeScript - 10 years
- Node.js - 10 years
- Amazon Web Services (AWS) - 8 years
- Python - 5 years
- Artificial Intelligence (AI) - 5 years
- Terraform - 4 years
- AI Agents - 2 years
Preferred Environment
Amazon Web Services (AWS), Git, Ubuntu, TypeScript, JavaScript, React, Node.js
The most amazing...
...thing I've built is the PowerX AI platform to analyse 300+ metrics over around 20,000 sites, for 2+ billion data points per day (600 GB raw) of ingested data.
Work Experience
Founder
2025 - PRESENT
Startup Founder
- Built a code modernisation system using static analysis to deterministically translate legacy COBOL.
- Prototyped a full-stack coding agent with file system manipulation and error correction.
- Developed novel visualisations to help human reviewers debug agent-written code.
- Created an Excel-automation AI agent, using a sandboxed execution environment to run AI-generated analyses.
Technologies: Artificial Intelligence (AI), Node.js, Pulumi, OpenAI API, JavaScript, SQL, Ubuntu, AWS Lambda, React, TypeScript, Amazon Web Services (AWS), PostgreSQL, FastAPI, Apache Iceberg, Full-stack, Full-stack Development, Next.js, Supabase
Head of Engineering
2021 - 2025
PowerX.ai
- Laid the foundations for the PowerX AI platform, establishing the patterns for distributed ML pipelines and high-frequency data processing.
- Maintained these critical infrastructure components while scaling my team to 15 people during this period of high growth.
- Increased responsibilities to include hiring, mentorship, and technical roadmap ownership.
- Remained deeply hands-on as the most active contributor to the codebase by all metrics.
- Worked closely with domain experts to translate complex power electronics requirements into robust software, bridging the gap from hardware to cloud.
Technologies: Amazon RDS, PostgreSQL, AWS Lambda, Docker, TypeScript, Python, Terraform, JavaScript, SQL, Ubuntu, React, Amazon Web Services (AWS), Node.js, Stripe, Apache Iceberg, Full-stack, Full-stack Development
Software Innovation Engineer
2020 - 2021
GSMA
- Managed an international team of six external and internal developers. I was fully responsible for the delivery of technical solutions from research prototype through to the released product.
- Built the GSMA Interoperability Test Platform, which aimed to harmonise APIs between some of the world's biggest network operators.
- Led all aspects of implementation, including solution design, development, and code review.
Technologies: Docker, TypeScript, Twilio, Python, JavaScript, SQL, Ubuntu, AWS Lambda, React, Amazon Web Services (AWS), Node.js, React Native, Full-stack, Full-stack Development
MVP Consultant
2016 - 2021
Self-employed
- Oversaw external implementation, monitored cloud deployment, and developed technical product strategy for a sustainable takeaway app.
- Provided custom development for an education eCommerce platform, taming an overflowing feature request list by integrating 3rd-party services against a very tight deadline.
- Led a team of four remote Polish developers working on a cryptocurrency trading platform, overseeing backlog management, code review, and training.
- Produced research reports and PoCs using blockchain technology, and guided technical strategy.
- Provided full-stack MVP development of a sophisticated automotive AI analytics dashboard.
Technologies: React, Node.js, AWS SDK, JavaScript, SQL, Ubuntu, AWS Lambda, MongoDB, TypeScript, Python, React Native, Stripe, FastAPI, Full-stack, Full-stack Development, Next.js, Supabase
Founder/CTO
2018 - 2019
Tyro
- Combined a unique curriculum of modern web development skills with a collaborative Agile workflow to teach apprentices and work on commercial projects with very limited practical experience.
- Recruited nine local developers of mixed abilities, and was responsible for continuously monitoring their learning and development, alongside making technical contributions on more advanced projects.
- Delivered React and React Native products to local businesses and organizations.
Technologies: React, Education, Git, React Native, JavaScript, SQL, Ubuntu, TypeScript, Node.js, Full-stack, Full-stack Development
Experience
AI Agent for Legal Timesheet Automation
https://fix-my-time.com/As CTO and co-founder of FixMyTime, I engineered an AI platform to automate the high-stakes process of legal billing and timesheet management. I rebuilt the system from an initial Python/JavaScript MVP into a scalable full-stack TypeScript architecture on AWS, utilizing PostgreSQL and Anthropic APIs.
The core technology featured an agentic pipeline that employed code execution within a secure sandbox. This approach ensured deterministic execution and strictly avoided common LLM issues such as hallucination and context rot. The platform functioned as a sophisticated "Excel automation" layer that pulled raw timesheet data and integrated with Document Management Systems (DMS) to validate work and programmatically infer the presence of missing entries.
I designed this "human-in-the-loop" pipeline to automatically clean and standardize thousands of entries against complex client guidelines. To meet the rigorous security standards of elite global law firms, I engineered the system for ISO 27001/SOC 2 compliance and on-premises portability. My technical leadership successfully moved the project from initial data trials to pilot implementations at top-tier firms.
The core technology featured an agentic pipeline that employed code execution within a secure sandbox. This approach ensured deterministic execution and strictly avoided common LLM issues such as hallucination and context rot. The platform functioned as a sophisticated "Excel automation" layer that pulled raw timesheet data and integrated with Document Management Systems (DMS) to validate work and programmatically infer the presence of missing entries.
I designed this "human-in-the-loop" pipeline to automatically clean and standardize thousands of entries against complex client guidelines. To meet the rigorous security standards of elite global law firms, I engineered the system for ISO 27001/SOC 2 compliance and on-premises portability. My technical leadership successfully moved the project from initial data trials to pilot implementations at top-tier firms.
Education
2015 - 2016
Master of Engineering (Distinction) Degree in Advanced Computer Science
University of Cambridge - Cambridge, United Kingdom
2012 - 2016
Bachelor of Arts (First Class) Degree in Computer Science
University of Cambridge - Cambridge, United Kingdom
Certifications
NOVEMBER 2020 - NOVEMBER 2023
AWS Certified Developer
Amazon Web Services
Skills
Libraries/APIs
Node.js, React, OpenAI API, Stripe
Tools
Terraform, AWS SDK, Git, Apache Iceberg
Languages
TypeScript, SQL, JavaScript, Python
Frameworks
React Native, Next.js
Platforms
Amazon Web Services (AWS), AWS Lambda, Ubuntu, Docker, Twilio
Storage
MongoDB, PostgreSQL
Other
Artificial Intelligence (AI), AI Agents, Full-stack, Full-stack Development, Supabase, Computer Science, Amazon RDS, Ethereum Smart Contracts, Distributed Cloud, Distributed Software, Education, Pulumi, Agentic AI, Anthropic, FastAPI
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