Juliano Pantoni

Experience

• Mar 2026 Present

  Ambush

  USA - Remote

  Senior Software Engineer

  Mar 2026 - Present

  Summary:

  • Global payment platform client — analytics & data validation.

  Responsibilities:

  • Validating analytics pipelines, user flows, and BigQuery datasets across 50+ tables processing 100k+ records daily, ensuring accurate and trustworthy metrics for executive-level reporting.
  • Using SQL for validation queries and data analysis, with JavaScript, TypeScript, React, and Next.js to analyze SDK behavior and build internal visualizations.
  • Implemented AI-assisted tooling to automate knowledge aggregation and streamline investigation workflows, reducing manual analysis overhead.
  • Collaborating with data science and data engineering teams to identify inconsistencies between source systems and reported metrics that were silently skewing analytics at scale.

  Achievements:

  • Surfaced recurring data inconsistencies across 50+ BigQuery datasets silently skewing executive-level analytics — now tracked, documented, and actively resolved with data engineering.
  • Shipped an AI-assisted investigation tooling prototype adopted by the team within the first sprint, cutting manual knowledge-aggregation time significantly.

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  • TypeScript
  • React
  • Next.js
  • JavaScript
  • BigQuery
  • AWS
  • GCP
• Dec 2023 Mar 2026

  CI&T

  UK - Remote

  Senior Software Engineer

  Dec 2023 - Mar 2026

  Summary:

  • Costa Coffee (loyalty platform) · British Telecom (payment UI) · Full-stack & platform engineering.

  Responsibilities:

  • Led React.js architecture and development for Costa Coffee's global loyalty ecosystem, maintaining mission-critical services supporting millions of daily interactions across multiple regions — zero downtime during ownership transition.
  • Drove AWS infrastructure optimization generating ~$120k in annual savings through service right-sizing, log retention tuning, and architectural improvements managed via CloudFormation.
  • Delivered a React-based analytics platform adopted by 4,000+ franchise stores for sales analysis and operational efficiency, saving 8+ hours per week of manual reporting.
  • Introduced CloudWatch observability upgrades, cutting mean time to incident detection from hours to minutes and reducing customer-impacting production incidents.
  • Upgraded British Telecom's payment UI using React + Jotai, expanding card compatibility and improving customer checkout completion rates by 30%.
  • Architected a C#/.NET platform with custom data-conversion workflows enabling zero-downtime migration, improving throughput by 40%+.
  • Refactored PHP services eliminating costly routines and isolating subsystems, raising execution efficiency 25–30%; unified separate React/TypeScript applications into the core product, lowering integration effort by ~20%.
  • Reduced request latency 25–35% through SQL path optimization and targeted caching layers; improved deployment reliability ~30% via CI/CD sequencing and environment parity revisions.
  • Adopted LLM-assisted testing and debugging workflows, shortening iteration cycles by 15–25%.
  • Mentored engineers on reusable frontend patterns, simplifying state flows and raising overall delivery quality across the team.

  Achievements:

  • Reduced AWS infrastructure costs by ~$120,000 per year through log retention adjustments, service right-sizing, and removal of unnecessary resources.
  • Delivered analytics platform adopted by 4,000+ franchise stores, saving 8+ hours/week of manual reporting.
  • Improved BT checkout completion rates by 30% through payment UI upgrade with React + Jotai.
  • Cut mean time to incident detection from hours to minutes with CloudWatch observability overhaul.
  • Achieved 40%+ throughput improvement via C#/.NET zero-downtime migration platform.

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  • React
  • TypeScript
  • Node
  • AWS
  • CloudWatch
  • Lambda
  • CloudFormation
  • Playwright
  • PHP
  • C#/.NET
  • PostgreSQL
• Apr 2022 Jun 2023

  Belvo

  Spain - Remote

  Software Engineer

  Apr 2022 - Jun 2023

  Summary:

  • Developed frontend applications for a large-scale Open Finance platform operating across multiple countries.

  Responsibilities:

  • Contributed to a JavaScript SDK used by clients to access Brazilian Open Finance APIs, integrated with Central Bank regulated systems.
  • Built interfaces using Vue.js, Nuxt, and TypeScript, focused on financial data visualization and user workflows.
  • Worked closely with backend, product, and compliance teams in a regulated fintech environment.
  • Improved frontend stability and release reliability through testing and continuous integration practices.

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  • Vue.js
  • Nuxt.js
  • TypeScript
  • JavaScript
  • Cypress
• Jun 2021 Jan 2022

  Fornax

  Brazil - Remote

  Software Engineer

  Jun 2021 - Jan 2022

  Summary:

  • Allocated at ChiroTouch (US healthcare SaaS) — full-stack feature delivery, performance optimization, and test coverage initiative.

  Responsibilities:

  • Built reusable Lit web components and refactored Redux state flows, reducing UI complexity by ~20%.
  • Implemented event-driven Node.js microservices (Express, Sequelize, Kafka), increasing message throughput by 15–25%.
  • Led a platform-wide performance initiative: isolated bottlenecks, optimized SQL, and reduced unnecessary data flows — raising performance by ~15% in high-usage modules.
  • Grew structured test coverage from ~30% to ~80%, which drove a ~35% reduction in production incidents.
  • Mentored 2 interns and coordinated end-to-end system evaluations with the Engineering Manager.

  Achievements:

  • Grew test coverage from ~30% to ~80%, reducing production incidents by ~35%.
  • Raised performance by ~15% in high-usage modules through profiling, SQL optimization, and data flow reduction.

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  • Node
  • JavaScript
  • TypeScript
  • Jest
  • JMeter
  • Express
  • PostgreSQL
  • Redis
• Sep 2020 Jun 2021

  Cohros

  Brazil - On site

  Software Engineer

  Sep 2020 - Jun 2021

  Summary:

  • Worked on a small SaaS product with a focus on delivering complete features.

  Responsibilities:

  • Built frontend and backend capabilities for end users and administrative dashboards.
  • Participated in basic technical decisions related to code structure and data organization.
  • Fixed production issues and supported the platform's gradual evolution.

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  • JavaScript
  • PHP
  • PHP Unit
  • Laravel
  • MySQL
  • HTML
  • CSS
  • Git
• Jan 2019 Jul 2020

  ARO Eleven Marketing

  Brazil - On site

  Junior Software Engineer

  Feb 2019 - Jul 2020

  Summary:

  • Developed and maintained web applications focused on digital marketing and data analytics.

  Responsibilities:

  • Implemented frontend and backend features for internal dashboards and client-facing tools.
  • Integrated services for campaign data collection and processing.
  • Fixed bugs, delivered small performance improvements, and supported production environments.
  • Collaborated with designers and analysts to deliver features incrementally.

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  • JavaScript
  • PHP
  • PHP Unit
  • HTML
  • CSS
  • MySQL
  • Git

  Software Engineer Intern

  Jan 2019 - Feb 2019

  Summary:

  • Supported web application development, mainly on frontend features and simple backend adjustments.

  Responsibilities:

  • Implemented visual improvements and functional fixes under supervision.
  • Participated in code reviews and learned version control best practices.
  • Supported maintenance tasks and basic testing.

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  • HTML
  • CSS
  • JavaScript
  • PHP
  • PHP Unit
  • Git

Projects

• Real-Time Logistics Map Platform

  TypeScript real-time map platform for a last-mile delivery SaaS (1,000+ customers), handling live vehicle tracking, dynamic route visualization, and multi-stop route optimization across a live dispatch map.

  • Integrated Google Maps API, MapTiler, and GraphHopper routing engine for real-time markers, turn-by-turn vehicle routes, and geofencing
  • Built for high-frequency update throughput with sub-second latency for live position streaming and route recalculation
  • Pushed TypeScript as the stack standard; ran hands-on onboarding sessions for the engineering team
  • Mentored developers on geospatial concepts, real-time data flows, and frontend architecture

  • TypeScript
  • React
  • Node
  • Socket.io
  • Google Maps API
  • MapTiler
  • GraphHopper
  • PostgreSQL
• Loyalty Platform Observability Overhaul

  Designed and implemented a CloudWatch alerting system for Costa Coffee's loyalty middleware, shifting incident detection from reactive (hours) to proactive (minutes) and protecting millions of daily user sessions.

  • CloudWatch custom metrics, alarms, and dashboards via CloudFormation
  • Reduced mean time to detection from hours to minutes
  • Zero customer-impacting incidents missed post-rollout

  • AWS
  • CloudFormation
  • TypeScript
  • React
  • Node
  • PostgreSQL
• Open Finance JavaScript SDK

  Built a JavaScript SDK enabling third-party integration with Brazilian Open Finance APIs regulated by the Central Bank, used across Latin America and Europe under strict compliance requirements.

  • Collaborated with backend, product, and compliance teams to ensure regulatory alignment
  • Deployed across Latin America and Europe in a regulated fintech environment
  • End-to-end tested with Cypress and Percy

  • JavaScript
  • TypeScript
  • Vue.js
  • Nuxt.js
  • Node
  • Cypress
  • Percy
• Platform Performance Initiative

  Led a company-wide effort at ChiroTouch to profile, benchmark, and optimize the highest-traffic modules of the healthcare SaaS platform.

  • ~15% performance improvement across high-usage modules
  • Test coverage scaled from ~30% to ~80%
  • ~35% reduction in production incidents

  • TypeScript
  • JavaScript
  • Node
  • Jest
  • JMeter
  • Playwright
  • Cypress
  • PostgreSQL

Skills