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Alex Johnson
linkedin.com/in/alexjohnson|github.com/alexjohnson
Summary
Software engineer with 4 years building high-traffic consumer products in TypeScript, React, and Node.js. Track record of measurable impact: shipping a checkout rebuild that recovered €2M in annual revenue and leading a microservices migration that cut deployment time by 94%. Looking for a senior IC role at a product-led company in the UK.
Experience
Software EngineerJun 2022 – Present
Finova Technologies, London, UK
•Rebuilt the checkout flow end-to-end in React and Node.js — reduced cart abandonment by 23% and page load from 4.2s to 1.1s, recovering an estimated €2M in annual revenue for 80k monthly active users.
•Architected and led migration of a monolithic payment service to 8 TypeScript microservices (3-person team); deployment time fell from 45 minutes to under 4 minutes using Docker and GitHub Actions CI/CD.
•Eliminated N+1 query patterns and introduced targeted PostgreSQL indexes across 12 high-traffic endpoints; average API response time dropped from 800ms to 120ms under 50k daily transactions.
•Deployed all backend services to AWS ECS with Redis session caching, cutting database read load by 40% and enabling zero-downtime blue/green deploys.
•Mentored two junior engineers through structured code review and pair-programming; both reached independent shipping velocity within 10 weeks.
Junior DeveloperSep 2020 – May 2022
Brightloop Agency, Bristol, UK
•Delivered 14 client projects in React and Next.js across retail and media, every one on time and within budget — zero missed deadlines across 18 months.
•Integrated Stripe, Salesforce, and HubSpot APIs for 6 enterprise clients; automated workflows saved each client an average of 15 staff hours per week.
•Introduced Jest testing to the shared component library; coverage rose from 0% to 78% in 3 months, cutting bug reports in production by roughly half.
Projects
bulk-img — open-source CLI for batch image optimisation
TypeScript · Sharp · Node.js · published on npm
•340+ GitHub stars; actively used in production by 5 design agencies to automate export pipelines.
•Processes 1,000 images in under 8 seconds — 70% faster than equivalent Photoshop batch export.
•Weekly npm downloads averaging 2,400 since launch with zero breaking changes across 11 releases.
collab-edit — real-time collaborative code editor
React · WebSockets · CRDTs · Node.js
•Supports concurrent editing for up to 50 users with sub-100ms sync latency using a custom CRDT merge algorithm.
•Deployed on AWS with auto-scaling; handled a 400-user spike during a university hackathon with no degradation.
Skills
TypeScript · JavaScript · React · Next.js · Node.js · PostgreSQL · Redis · Docker · AWS (EC2, S3, ECS, Lambda) · GitHub Actions / CI/CD · Kubernetes (basic) · REST APIs · GraphQL · Jest / Vitest · Agile / Scrum · Git
Education
BSc Computer Science — 2:1Sep 2017 – Jun 2020
University of Bristol
•Dissertation: real-time collaborative code editor using WebSockets and CRDTs (awarded 82%).
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