Building and scaling microservices powering multi-region operations across the UK and US:

• Launched US market by designing and implementing multi-country invoicing schedules, impacting 100% of customers across both regions
• Increased conversion by 30% by integrating Braze campaigns with personalised product recommendations
• Improved Trustpilot positive reviews by 15% through Dixa chatbot integration enabling compliant subscription cancellations
• Designed and deployed CI/CD pipelines and implemented liveness/readiness checks across all microservices, improving reliability, reducing operational overhead and making them 30% faster
• Strengthened observability by integrating critical dependency monitoring and automated health reporting

Led engineering initiatives across SEO, privacy, tracking, and performance marketing systems:

• Led migration of restaurant landing pages from REST to GraphQL, improving performance and maintainability
• Served as technical lead for SEO projects, coordinating 5 engineers across 3 different timezones: UK, Poland, and India
• Delivered Apple Maps and Snap Maps integrations using Python, Snowflake, and PostgreSQL to improve location-based discovery
• Led and managed SCRUM ceremonies, including stand-ups, planning, refinement, and retrospectives for 12 engineers
• Implemented A/B experimentation framework using React, Redux, and Next.js, enabling data-driven product decisions
• Built onboarding and mentorship frameworks for 5 new engineers to help them learning Ruby and Python
• Implemented Facebook CAPI Gateway with Terraform, driving NCA I$ IRR \ge 20 % $ for marketing spends
• Improved postcode-based search across Middle East, Australia, and Hong Kong markets

Developed multi-regional trading systems for bonds, loans, derivatives, and mortgage products:

• Led development of reconciliation and trade-effectiveness reporting (Best Execution), improving accuracy and transparency
• Increased multi-factor classification accuracy from 95% to 98% using Slang and PURE
• Built back-end services integrating with 4 different data sources: Bloomberg, Markit, Market Axes, and TradeWeb
• Designed and delivered a full-stack pricing-rules management platform for bond trading desks
• Automated detection and reporting of mortgage payment breaks, reducing manual workload
• Served as technical lead for large-scale novation booking projects
• Mentored 4 interns and 3 new joiners engineers, accelerating onboarding into GS technologies

I've been in projects to implement, improve, adapt and enable features across North America Retail market places (Mexico, Canada and United States):

• Enabled Amazon Prime for 3P sellers in Canada, unlocking 30% seller adoption
• Designed architecture for tax-regulation in Mexico for sugar and alcohol categories
• Built Prime-benefits postcode widget for Amazon Mexico increasing 15% customer acquisition
• Improved Prime delivery and upselling flows for Mexico marketplace
• Contributed to interview process improvements, including new problem design and metric refinement

Worked on Android multimedia subsystems for Audio and Video on x86 and x64 architectures:

• Implemented low-level enhancements for media codecs, playback, and hardware acceleration, reducing latency and improving throughput
• Collaborated with cross-functional teams (firmware, kernel, Android framework) to deliver platform-level multimedia fixes
• Contributed to validation, debugging, and performance tuning for Android builds targeting Intel chipsets