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Cristian RosuCR

Cristian Rosu

Senior Java Engineer

€500/day
Bucharest, RO
8-15 years

Average response time: 1 hour

About Cristian

👉 Senior Java / Kotlin Developer/Contractor/Freelancer with 10+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞. I assist companies in designing and implementing their software solutions, from prototyping to production.

🔧 𝐁𝐚𝐜𝐤𝐞𝐧𝐝
• Java/Kotlin
• Hibernate
• Spring Boot/Spring Cloud
• SQL/NoSQL (PostgreSQL, MySQL, MongoDB, etc.)
• Messaging (Kafka, RabbitMQ, ActiveMQ, SNS)
• REST/GraphQL
• JavaEE
• Gradle/Maven
• JUnit

☁ 𝐃𝐞𝐯𝐎𝐩𝐬
• AWS/GCP/Azure
• Kubernetes
• Docker
• Linux
• CI/CD
• Github actions
• Playwright / Selenium

💻 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝
• Angular 2+
• HTML / CSS
• JavaScript / Typescript

🏗 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞
• Microservices Architecture
• Event-Driven Design
• Domain-Driven Design

🦄 Let's get in touch!

Phone: +𝟒𝟎 𝟕𝟔𝟕 𝟖𝟗𝟓 𝟑𝟎𝟏
Email: 𝐜𝐫𝐢𝐬𝐭𝐢.𝐫𝐨𝐬𝐮𝟒@𝐠𝐦𝐚𝐢𝐥.𝐜𝐨𝐦
  • English

    Native or bilingual

  • Romanian

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Haiilo
    Senior Java Engineer
    October 2023 - Today (2 years and 8 months)
    Part of the team that focused on improving user experience for a platform with 4M+ active users Built and improved the global search system, allowing users to search across all areas of the platform using keywords. This includes: better search results, better reliability of the service and always having privacy and permissions in mind. Worked on developing an AI summarization feature where employees can view a summary of missed company communications if they haven't logged in a while. Set up a scheduled GitLab pipeline that runs our Playwright end-to-end tests on a nightly schedule and shares the results automatically in Slack and on browser app where our QA team can review the failures. Developed the backend systems for a variety of new features such as: notfications (web/mail/push), organizational charts, employee onboarding, live chat, timeline posts.
  • Gorillas
    Senior Java/Kotlin Developer
    February 2022 - October 2023 (1 year and 8 months)
    Split old monolith into separate microservices powered by Spring Boot and Kubernetes Implemented a cache mechanism that decreased the initial load time of the application by 50% Worked closely with our Data Science team to calculate, ingest and distribute product recommendations to our end customers Designed and implemented statistic dashboards where our suppliers can understand how their products are performing inside Gorillas I was part of the core team that implemented the integration between Getir and Gorillas after the company was acquired Getir
  • Upwork
    Senior Java Developer
    February 2020 - January 2022 (1 year and 11 months)
    Developed and maintained a new GraphQL API Platform used for integrations with different systems in our application, currently handling about 8M+ GraphQL requests per day. Developed a new system for GraphQL subscriptions based on Hermes events. Developed and maintained Frontend Gateway, a gateway specifically used for frontend web pages, handling 150M+ requests per day. Developed and maintained API Gateway, a gateway used for internal and external backend requests, handling 400M+ requests per day.

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Education

  • University of Bucharest
    2017

Skill set

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