Julien Hoarau

Software Engineer

Los Angeles, California, United States18 yrs 7 mos experience
Highly StableAI Enabled

Key Highlights

  • Led platform transformation at Grindr for global scale.
  • Increased Netflix Ads user tier to over 50 million.
  • Expert in microservices and cloud computing.
Stackforce AI infers this person is a Backend-heavy Fullstack Developer with expertise in SaaS and Streaming Services.

Contact

Skills

Core Skills

Software ArchitectureDevopsMicroservicesGraphqlJava

Other Skills

KotlinMobile ApplicationsArtificial Intelligence (AI)Spring BootCloud ComputingReact.jsCockroachDBAmazon Web Services (AWS)SpinnakerElastic Stack (ELK)Reactive ProgrammingDockerMavenRedisAWS

About

I am a full-stack developer who likes solving challenging problems in order to deliver customer value. I get sh*t done and I am always looking for ways to improve how we do things. Technologies: Java, Spring Boot, Docker, Maven, Redis, AWS, Reactor, RxJava, Hystrix, Resilience4J, Netty, React, Typescript, Splunk, Datadog...

Experience

18 yrs 7 mos
Total Experience
3 yrs 7 mos
Average Tenure
1 yr
Current Experience

Grindr

Senior Principal Software Engineer

Jun 2025Present · 1 yr · Los Angeles, California, United States · Hybrid

  • As Senior Principal Engineer at Grindr, I provide technical leadership and strategic direction across the company’s platform and application ecosystem. My focus is on scaling systems, evolving architecture, and driving engineering excellence as Grindr transforms into a world-class app experience.
  • Key Responsibilities:
  • Define and guide the technical vision and platform architecture across backend, mobile, and infrastructure domains.
  • Partner with product and engineering leaders to ensure alignment between technology strategy and business objectives.
  • Drive scalability, reliability, and modernization initiatives across Grindr’s core systems.
  • Lead technical design reviews and provide mentorship for senior engineers and tech leads.
  • Champion engineering standards, platform consistency, and long-term maintainability.
  • Impact:
  • Playing a key role in Grindr’s multi-year platform transformation—building the technical foundations for innovation, performance, and growth at global scale.
KotlinSoftware ArchitectureMobile ApplicationsDevOpsArtificial Intelligence (AI)

Netflix

3 roles

Staff Software Engineer, Commerce Engineering

Promoted

Jun 2022Oct 2025 · 3 yrs 4 mos

  • Led and delivered multiple high-impact projects, increasing the Ads user tier from 0 to over 50 million monthly active users.
  • Provided technical leadership to the Growth Product Experience Organization (70+ engineers) in the form of architectural guidance and best practices to scale systems, ensuring reliability, efficiency, and strong performance.
  • Led the technical direction of a multi-year modernization effort poised to increase our experimentation velocity by a factor of six.
  • Served as a key member of the Commerce Engineering GraphQL committee, influencing API design patterns and ensuring optimal data-fetching strategies.
  • Advocated for GraphQL best practices within the organization, leading to more maintainable, secure, and performant services.
  • Regularly partnered with product managers, designers, and engineers to align technical roadmaps with business objectives.
  • Demonstrated thought leadership by presenting at internal tech talks and fostering a culture of continuous improvement and innovation.
  • Designed and developed a Commerce experience visualization internal tool that has drastically improved the way Product Managers, Designers, Partner Managers, and Engineers visualize the commerce experiences available across our platforms.
GraphQLJavaMicroservicesSpring BootCloud ComputingDevOps+1

Senior Software Engineer, Animation Studio Technology

Sep 2020Jun 2022 · 1 yr 9 mos

  • Led, designed, and developed an application to facilitate talent recording in Studio. This tool reduces the time it takes to deliver scratch and production recordings to editors from days to a few minutes.
  • Worked on a tool fully integrated with ShotGrid meant to replace Google Drive for artists, reducing turnaround time for assets from days to minutes.
  • Guided the organization-wide pipeline initiative by providing feedback to every squad, drawing high-level architecture to help steer conversations, and jumping into the development of multiple initiatives.
  • Wrote and maintained the Java ShotGrid client used by multiple teams across the company to access Autodesk ShotGrid
  • Mentored the Animation organization around microservices and Java development. Helped pipeline TDs get proficient with cloud base development
  • Ran Reactive programming workshops
  • Technologies: Microservices, Java, Spring Boot, Gradle, GraphQL, CockroachDB, AWS (DynamoDB, SQS, EC2, ALB, CloudWatch...), Reactor, Hystrix, Spinnaker, ELK...
JavaSpring BootMicroservicesGraphQLCockroachDBCloud Computing

Senior Software Engineer, Promotional Artwork Engineering

Jun 2019Sep 2020 · 1 yr 3 mos

  • Led, designed, and developed initiatives to improve the way artwork that is visible on Netflix gets fulfilled. For each show, hundreds to thousands of artworks are delivered
  • Migrated millions of assets from a legacy digital asset management system to the new one without downtime or incidents
  • Mentored the team around code quality and test coverage, as a result, coverage went from 10% to 60%
  • Ran Reactive programming workshops
  • Reduced on-call load 6 fold by introducing and enforcing a strong operational mindset
  • Technologies: Microservices, Java, Spring Boot, Gradle, AWS (DynamoDB, SQS, EC2, ALB, CloudWatch...), Reactor, Hystrix, Spinnaker, ELK...
MicroservicesJavaSpring BootAmazon Web Services (AWS)SpinnakerElastic Stack (ELK)+1

Atlassian

4 roles

Principal Developer, Fabric team

Promoted

Oct 2016May 2019 · 2 yrs 7 mos

  • Led, design, develop, and run multiple services offering common features in all our products (mentions, share, emoji, client side pubsub...)
  • Collaborate with technical leaders in the company to solve technical challenges for the company
  • Wrote several internal libraries to improve development process and operations
  • Mentor new developers on the team to get them up to speed as quickly as possible
  • Subject Matter Expert on reactive programming in Java. Run reactive programming with Reactor workshop within the company
  • Member of the Java Working group, in charge of the Java technology stack in the company
  • Technologies: Microservices, Java, Spring Boot, Docker, Maven, Redis, AWS (DynamoDB, SQS, EC2, ALB, CloudWatch...), RxJava, Reactor, Hystrix, Resilience4J, Splunk, Datadog...

Senior Developer, HipChat team

Oct 2014Oct 2016 · 2 yrs

  • Part of a small team that delivered a new add-on system for HipChat allowing third party developers to integrate into HipChat UI seamlessly. I was involved from the inception, writing specification, implementing backend and frontend components and devOps. "Systems and methods for synchronizing integrations in a collaboration platform" patent granted as part of this project.
  • Implemented the HipChat/Uber integration in a week to demonstrate the power of our new add-on system. This integration was picked up by a multitude of sites all over the world and increased HipChat presence
  • Refactored HipChat legacy add-on management code to help the team deliver new features faster
  • Increased frontend development speed by introducing Hot reload to HipChat web client project
  • Interviewed hundreds of candidate for developer, architect and team lead roles
  • Technologies: Microservices, Python, Twisted, Redis, MySQL, React, HTML, CSS, Javascript

Senior Developer, Confluence team

May 2014Oct 2014 · 5 mos

  • Optimized product performance by 400% in order to successfully ensure smooth transition of one of Atlassian biggest public facing system to our product Confluence Questions
  • Developed new features from backend to frontend to help bring Confluence Questions to a multimillion business
  • Technologies: Java, Javascript, SQL, Backbone, Lucene, Maven, HTML, CSS

Java Developer, Confluence team

Sep 2012May 2014 · 1 yr 8 mos

  • Designed and developed a new product: Confluence Questions, an enterprise Q&A platform
  • Revamped Confluence search feature from the ground up to offer more accurate results and better performance
  • Worked alongside product manager and designers to fix a high number of issues and deliver Confluence 5.0 on schedule
  • Technologies: Java, Javascript, SQL, Backbone, Lucene, Maven, HTML, CSS

Kalistick

R&D Software Engineer

Aug 2008Sep 2012 · 4 yrs 1 mo · Greater Lyon Area

  • As a full stack developer, designed and implemented features used to compare quality in hundreds of projects
  • Created a dependency analysis tool that has analyzed more than 50 millions of C# code
  • Developed a C# agent used to trace functional test execution and coverage at runtime
  • Built plugins to display software quality information in Jira and Crucible
  • Technologies: C#, Java, Javascript, jQuery, HTML, CSS

Sncf

Software Engineer, Intern

Dec 2007Jun 2008 · 6 mos · Greater Lyon Area

  • Designed and implemented a software quality analysis platform for C# projects (Awarded First Prize among 100+ Computer Science Graduate projects)
  • Technologies: C#, Java, Javascript, jQuery, HTML, CSS

Etranges libellules

Tools Developer, Intern

May 2007Sep 2007 · 4 mos · Greater Lyon Area

  • Developed a game editor plugin allowing real-time interaction with Maya, a 3D modeling software
  • Implemented an automatic shadow map generation tool in Maya
  • Improved animators workflow by improving the animation editor
  • Technologies: C++, Maya, MEL

Education

INSA Lyon - Institut National des Sciences Appliquées de Lyon

Master's degree — Computer Science

Jan 2003Jan 2008

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