Ariel Paulin
ariel.paulin@gmail.com | linkedin.com/in/arielpaulin | github.com/anpaulin

Results-oriented Software Engineer and Team Lead with 8+ years of experience designing high-scale JVM applications and leading agile engineering teams.

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EXPERIENCE
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Technical Team Lead | A2X Accounting | Toronto, Ontario (Remote)  Feb 2026 – Jul 2026
  • Refactored legacy Java Amazon SP-API integrations on App Engine and Spanner to resolve tech debt
  • Led technical planning and roadmapping, mentoring developers on clean code and best practices
  • Hardened unstable beta features, reducing customer incident turnaround by 96%
  • Enhanced system reliability by building GCP Monitoring dashboards and alerting for key features
  • Championed Claude Code best practices when automating PRs, tickets, and system design docs

Senior Software Developer | CNH Industrial | Toronto, Ontario (Remote)  Mar 2023 – Feb 2026
  • Architected robust, real-time telemetry pipelines processing 2B+ daily records using Scala, Spark, and Flink
  • Optimized batch jobs and enhanced analytics workflows using Databricks notebooks
  • Designed REST APIs and integrated enhanced engineering monitoring and dashboarding
  • Extended the internal telemetry rules engine, enabling complex cross-domain query compositions
  • Spearheaded Java/Spring Boot feature development enabling data import and export for users

Senior Software Developer | DataPassports | Toronto, Ontario (Remote)  Jul 2020 – Dec 2022
  • Enhanced a Scala-based Spark application with a cross-functional team, improving performance and scalability
  • Implemented a multi-stage Scala Spark pipeline integrating TensorFlow Java API for entity recognition
  • Optimized API workflows with Kafka and Spark Streaming, achieving ~ 20x better processing performance
  • Developed token-based authentication for Azure SQL using Azure Active Directory to improve security
  • Partnered with leadership to define specs and deliver custom features for high-value enterprise clients

Scala Developer | AwareAds | Toronto, Ontario                Jun 2019 – Jul 2020
  • Acted as the lead Scala developer of the Real-Time Bidding Platform (RTB)
  • Conducted technical audits of core services to identify scaling bottlenecks and define roadmaps
  • Redesigned and implemented all backend microservices using the Play Framework
  • Built an AdExchange simulator for stress testing infrastructure and simulating the RTB environment
  • Created testing suites using ScalaTest and custom scripts for data transformations

Play Developer | Publicis Sapient | Toronto, Ontario         Oct 2018 – Apr 2019
  • Engineered features for Walmart.ca’s checkout flow using Play Framework to enhance user experience
  • Collaborated with a cross-functional team to integrate third-party services, ensuring seamless functionality
  • Deployed and maintained services using Jenkins and Walmart internal tools, ensuring reliability
  • Created automated test suites using ScalaTest and assisted in refactoring legacy codebase tests

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SKILLS
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Languages:              Scala | Java | SQL | JavaScript
Frameworks & Libraries: Akka | Spark | Kafka | Flink | Play Framework | Spring Boot | React
Cloud & DevOps:         GCP | Azure | AWS | Docker | Kubernetes | Terraform | Grafana | Git | Claude Code
Technical Leadership:   Cross-Functional Leadership | Stakeholder Management | Technical Translation | Mentorship

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EDUCATION
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University of Waterloo | BASc. Computer Engineering          Sep 2013 – Apr 2018
Waterloo, Ontario