John Mayfield
Senior Software Engineer at NextMove Software
Cambridge, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolJohn Mayfield is a Senior Software Engineer based in Cambridge with 14 years’ experience building systems that extract, process and search chemical information. He combines full-stack engineering across Java, C++, JavaScript and databases with deep domain expertise from a PhD in molecular biology and long-term stewardship of the Chemistry Development Kit, contributing core algorithmic improvements in stereochemistry, aromaticity, ring perception and subgraph matching. At NextMove Software he architects and implements cheminformatics products spanning naming, reaction classification, graph-edit databases and fast similarity search, often adding low-level optimizations and backend extensions. His work blends research-grade algorithm design with pragmatic production engineering, and he’s known for improving molecular hash codes, canonical labelling and 2D structure rendering in widely used open-source tooling. A not-obvious strength is his ability to move between high-level cheminformatics concepts and C/C++/Java implementation details, making him effective at both prototyping and shipping performant, chemistry-aware systems.
14 years of coding experience
PhD, Molecular Biology, PhD, Molecular Biology at University of CambridgeBSc, Bioinformatics with a Years Work Experience, First-class honours, BSc, Bioinformatics with a Years Work Experience, First-class honours at University of BirminghamGCSE/A Levels, GCSE/A Levels at John Hampden Grammar SchoolEMBL
Stackoverflow
331reputation
25kreached
2answers
0questions
Github Skills (13)
data-structures10
javas10
data-structure10
java10
algorithm9
fingerprinting9
algorithms9
look-and-feel6
macos6
assemblies6
substance6
swing6
build-automation6
Programming languages (14)
Github contributions (5)
cdk/cdk
Feb 2012 - Jan 2023
The Chemistry Development Kit
Role in this project:
Back-end Developer
Back-end DeveloperContributions:17 releases, 80 reviews, 3569 commits in 11 years 1 month
Contributions summary:John primarily contributed to the Chemistry Development Kit (CDK) repository, specifically focusing on bug fixes, enhancements, and code cleanup related to the core components and data structures. Their work involved refining the graphical representation of molecules, optimizing path-based fingerprints, and improving the handling of aromaticity and stereochemistry within the library. The commits demonstrate a deep understanding of the CDK's internal workings.
cheminformaticsdevelopment-kitchemistrychemistry-development-kitbioinformatics
opensmiles/opensmiles.github.io
May 2016 - Sep 2021
OpenSMILES website
Contributions:1 PR, 11 pushes, 1 branch in 5 years 5 months
jekyll
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