Java Developer

• Level: Senior
• Type: B2B
• English Level: Upper-Intermediate
• Location: Poland
• Skills: Java Kotlin SQL

Responsibilities

• Develop and maintain efficient, scalable code and infrastructure capable of handling thousands of operations per second

• Innovate and implement new features that elevate user experience and satisfaction

• Monitor and analyze application metrics, responding promptly to alerts to ensure high availability and performance

• Develop and maintain Spark ETL pipelines

• Fine-tune services and databases for optimal cost-efficiency and ease of maintenance

• Perform in-depth architecture and code reviews to uphold the highest standards of quality and engineering excellence

• Continuously improve technologies, ensuring robust security, streamlined deployments, and adoption of the latest advancement

  Requirements

  • 6+ years of hands-on Java development experience

  • Proficiency in designing and building APIs using HTTP and REST

  • Strong knowledge of relational databases

  • Experience with AWS, Linux, and server-side development

  • Experience with Spark, ETL pipelines, bigdata storage formats or willingness to learn it

  • Understanding of distributed computing principles and algorithms

  • Familiarity with asynchronous patterns and messaging technologies

  • Expertise in Design Patterns for scalable, stable systems

  • Open to adopting modern approaches to efficient development, including AI tools

  • Spoken English. It may require discussing stakeholders requirements or troubleshooting an issue

  Nice to Have

  • Experience with Python and other scripts

  • Familiarity with NoSQL databases, large datasets, or cloud storage like Amazon S3

  Our Processes & Beliefs

  • DevOps is not a team – it is a culture

  • Continuous Deployment – multiple times daily

  • Service Oriented Architecture and APIs

  • Full test automation – we have no QA team

  • Clean Code – continuous improvement of the codebase as part of the daily tasks

  Key Projects

  Our team is developing a several key projects including:

  • AI Proxy – A universal API that provides unified access to all supported LLM providers

  • AI Translations – A suite of services for generating translations and assessing translation quality

  • Data Pipelines – Data pipelines of varying complexity that make data from all our services available in the Data Lake

  • Data Infrastructure – The Data Lake itself, along with reporting and analytics tools

  Technology Stack:

  • Core Technologies: Java, Kotling

  • Databases and messaging: MySQL, DynamoDB, RabbitMQ, Kafka

  • Cloud and Infrastructure: AWS (EC2, ECS, S3, RDS, Lambda), Linux, Terraform, Docker

  • Data Engineering: Apache Airflow, Spark, Parquet, Iceberg

  What Matters to Smartling?

  • Empower our clients to grow their businesses while you grow as a professional and individual.

  • Learn new skills and advance your career through real-world challenges and cutting-edge tools.

  • Be part of a small, energetic, and collaborative team that values your contributions.

  • Enjoy a balanced work-life environment with flexible PTO.