Senior Java Engineer - Flix Train Operations Management System

City: Warsaw
Department: IT & Engineering

Recruiter: Anna Symonenko

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89-119 PLN/hour

We are looking for a skilled Senior Java Engineer for service agreement collaboration (B2B contract) to cooperate with a team that focuses on automating and streamlining FlixTrain’s operational processes, creating internal tools that help teams manage a growing and increasingly modern fleet. The team works in a collaborative, pragmatic, low-bureaucracy way. 

Scope of services

This engagement sits in a greenfield environment, where many systems are designed and built from scratch. Engineers are actively involved throughout the entire lifecycle: understanding operational challenges, contributing to architectural decisions, and ensuring high quality through solid testing practices. We value engineers who are curious about the business, eager to participate in discovery and problem framing, and comfortable navigating ambiguity. 

About the Engagement

  • Collaborate with a self-organized, cross-functional distributed team responsible for a set of products, contributing directly to the success of the business 
  • Place our users at the center when developing solutions together with the team 
  • Contribute to the development process within an Agile environment 
  • Design new products from scratch and frequently deliver new versions of existing products, using continuous integration and automation 
  • Work with cutting-edge technologies and tools 
  • Contribute to technical decisions inside and across teams to improve technical excellence 
  • Share knowledge and provide technical guidance through code reviews and close collaboration 
  • Our tech stack: Java, Spring/Spring Boot, Kafka, MySQL (RDS), MongoDB (DocumentDB), AWS, Docker, GitLab CI, Kubernetes, Terraform, Datadog 

About You

  • 7+ years of professional experience with Java 
  • Strong experience developing distributed systems using Spring Boot 
  • Experience with relational (MySQL, PostgreSQL, RDS) and NoSQL databases (MongoDB, DocumentDB) 
  • Experience with caching solutions such as Redis, ElastiСache 
  • Experience with event-driven architectures and messaging services like Kafka/SQS/SNS/RabbitMQ 
  • Hands-on experience with AWS services (e.g. RDS, S3, EC2) 
  • Experience with DevOps and infrastructure technologies, including Docker, Kubernetes, GitLab CI, Terraform, and Datadog 
  • Upper-intermediate level of English or higher 
  • Experience working within an Agile setup 

Nice to have: 

  • Data Engineering skills: ETL, Snowflake, etc. 
  • Experience working with distributed teams 

Collaboration model

  • Contract type: Cooperation based on a service agreement (B2B/freelance contract), not an employment contract 
  • Working model: Independent contractor responsible for delivering agreed services and submitting invoices 

 

 

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This is a Poland-based position. Are you currently based in Poland?

This is a Poland-based position. Are you currently based in Poland?

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Are you open to a B2B collaboration model?

Do you already have a registered business entity in Poland or are you in a position to set one up?
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Do you require visa/residence sponsorship to be employed in Poland?

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Voluntary Gender Identification

Dear potential Flixie, 

At Flix, we are committed to fostering diversity and inclusion. To support this initiative, we invite all applicants to complete our demographic questions on voluntary basis. Your responses will be processed as anonymized data and not linked to your profile, and thus assessed for statistical purposes and internal research. 

If you prefer not to provide this information, simply click on "I do not wish to answer." Be assured that neither the decision not to participate nor your answers will have an impact on your application, and your answers will remain anonymous and unidentifiable to you individually. The decision on your application will be made independently from your participation and the information you provide. 

We appreciate your cooperation in advance! 

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