Yousof Kamal — Senior Software Engineer

WORK EXPERIENCE 

Senior Software Engineer 

Sainsbury’s Tech, J Sainsbury’s PLC — London, UK | Hybrid-Remote | Nov 2022 – Present 

Architected and delivered business-critical authorization and gateway solutions for the Together With ecosystem, serving as technical lead for multiple high-impact projects affecting millions of customers.

Key contributions: 

• Architected enterprise authorization platformreplacing legacy monolith, achieving 95% improvement in administration speed and enabling secure rapid application development across business units
• Designed and implemented custom L7 API Gatewayusing NestJS and Hono.js, capable of handling 1M+ simultaneous requests per pod with memory-efficient proxy capabilities for HTTP, WebSocket, and Server-Sent Events
• Led Event Sourcing architecture implementationresulting in 80% performance improvement over legacy solutions, utilizing Kafka, DynamoDB, and Neptune graph database for real-time data processing
• Implemented asymmetric encryption protocolsfor secure internal communication preventing MITM attacks, successfully passing multiple InfoSec security audits and compliance reviews
• Built scalable notification engineusing Redis as document database with full-text search capabilities, enabling real-time communication between 3rd party and integrated applications via Server-Sent Events
• Mentored development teamon Event Sourcing, CQRS patterns, and GraphQL Federation while leading strategy sessions and stakeholder management with Engineering Managers and Product teams

Technologies:Nodejs, Deno, Typescript, Kafka, Redis, DynamoDB, React, Nextjs, Neptune, Spring, MongoDB, PostgreSQL, MS SQL, Snowflake, Kubernetes, AWS, GraphQL, Jira, etc. 

Full-stack Technical Lead 

BairesDev LLC — Remote | Jan 2022 – Jan 2023 

Led technical modernization initiatives and product roadmap execution, driving performance improvements and cost optimization across core web services and marketing platforms.

Core Contributions: 

• Spearheaded JAMStack modernizationof legacy marketing websites and lead management services, implementing cloud-based architecture that improved performance by 300% while reducing operational overhead
• Resolved critical legacy system issueswithin first 6 months, implementing forward-compatible solutions and establishing best practices for scalable development
• Collaborated with C-level executiveson technology strategy and infrastructure decisions, contributing to product roadmaps and feature development across multiple departments
• Optimized cloud infrastructureresulting in significant cost reductions while maintaining high availability and performance standards
• Established development processesand code quality standards, improving team productivity and deployment reliability

Technologies:Nodejs, Typescript, Redis, DynamoDB, React, Nextjs, PostgreSQL, GCP, Laravel, WordPress, GraphQL, Jira, etc. 

Lead Developer 

100 Marketers LLC — Remote | Aug 2020 – Apr 2022 

Defined architecture for a high-throughput data ingestion system processing lead data from 1200+ sources. Led a team of 15+ developers across multiple departments and product lines. Architected and delivered an enterprise-scale lead management platform while leading a distributed development team and managing an extensive web property portfolio.

Core Contributions: 

• Architected comprehensive lead collection systemprocessing data from 1,200+ sources, implementing real-time and pre-computed reporting mechanisms that reduced processing time by 300%
• Led development team of 15+ engineerswhile managing technical operations for 800+ websites, establishing development standards and deployment pipelines
• Reduced infrastructure costs by 65%through strategic migration to optimized AWS and GCP services while improving system reliability and performance
• Built core business intelligence platformfrom scratch, delivering 3x faster report generation and saving 50% in hosting costs through efficient architecture design
• Automated critical data collection processesensuring high-value website maintenance and business continuity, reducing manual intervention by 90%
• Created comprehensive documentation suitewith 50+ technical guides and process documents, ensuring knowledge transfer and operational continuity

Technologies:Nodejs, Typescript, Redis, Vue, Nuxt, React, Vue, Nextjs, PostgreSQL, GCP, Laravel, WordPress, Wrike, etc. 

Lead Developer | STO Estratagias Online

Remote | February 2015 – April 2020

Developed high-performance web services and scalable hosting solutions, progressing to Partner role with expanded technical and business responsibilities.

• Architected and developedenterprise-scale web services handling high-traffic loads with optimized performance and reliability
• Optimized VPS hosting infrastructurefor maximum performance and scalability, implementing monitoring and automated scaling solutions
• Advanced to Partner rolewith expanded responsibilities including technical strategy, client relationship management, and business development
• Implemented performance optimization strategiesresulting in improved system responsiveness and reduced server resource consumption
• Managed stakeholder relationshipswith Engineering Managers and Product teams, ensuring alignment between technical delivery and business objectives

Technologies:Nodejs, Typescript, Redis, Vue, Nuxt, React, Vue, Nextjs, PostgreSQL, GCP, Laravel, WordPress, Wrike, etc. 

Web Developer | First Page Attorney LLC

Remote | February 2013 – April 2015

• Developed custom web applications and content management solutions for legal industry clients
• Implemented responsive design and performance optimization techniques improving user engagement

Freelance Web Developer

Remote | February 2012 – February 2013

• Delivered custom web development solutions for diverse client portfolio
• Established foundation in full-stack development and client relationship management