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Senior Technical Expert Java

Stermedia
Contract type
Freelance
Work mode
Remote
Experience
Senior · Not stated

Level inferred from job title

Job description

A Senior Technical Expert role at Stermedia, serving as the technical cornerstone of a Data Marketplace platform built on Data Mesh principles. The role guides the architecture's evolution from a modular monolith to microservices and leads development with a modern Java/AWS stack.

At a glance

Employment
Independent contractor
Work mode
Remote
Pay
PLN 22,000 – 33,000 / month

What you'll do

  • Lead the strategic transition from a modular monolith to microservices, ensuring domain boundaries are respected and performance remains high
  • Take ownership of the development of new components and ideas while cooperating with a multidisciplinary team to deliver end-to-end experiences to End Users
  • Write clean, high-performance code using Java 21+ features (Virtual Threads, Pattern Matching) to handle complex data transactions
  • Work on the roadmap to integrate AI/LLM capabilities into the search engine (Sinequa), enabling users to explore data assets via natural language and intelligent discovery
  • Oversee the polyglot persistence layer, optimizing PostgreSQL for relational integrity and MongoDB for flexible metadata storage
  • Design and maintain scalable infrastructure within AWS, ensuring CI/CD pipelines and deployment strategies are best-in-class
  • Act as a force-multiplier for the team, conducting rigorous code reviews and setting the standard for technical excellence
  • Refine the modular boundaries of the current Java 21 application and deliver scalable and extensible transaction modules enabling Request-to-Use processes within the DataMarketPlace
  • Orchestrate the consolidation of existing Marketplace ecosystems into DataMarketPlace, onboarding tens of thousands of assets and thousands of users
  • Integrate AI-driven exploration features atop the Sinequa search layer

What we're looking for

  • Strong experience with modern Java (21+) and Spring Boot 3.x
  • Hands-on experience with messaging technologies, ideally Solace
  • Good understanding of SPA architecture and frontend development with Angular and TypeScript
  • Familiarity with integration patterns and enterprise networking
  • Solid architectural knowledge, including modular monoliths, microservices, Data Mesh, and Domain-Driven Design
  • Experience working with PostgreSQL, MongoDB, and search platforms such as Sinequa
  • Practical experience with AWS services, including EC2, RDS, Lambda, and EKS
  • Experience with Infrastructure as Code, preferably Terraform
  • A technical visionary who anticipates where the architecture will break two years from now
  • Data-centric, understanding that in a Data Mesh the product is the data itself, caring about metadata, lineage, and discoverability
  • User-centered, caring about the end user experience and able to cooperate with UX and Frontend developers
  • A pragmatic architect who knows when to stick with a monolith for speed and when the swell justifies a move to microservices
  • AI curious, excited about moving beyond keyword search into semantic search and AI-driven data exploration

Your team

Data Marketplace

A platform built on Data Mesh principles providing a shop-for-data experience and FAIR data access to Digital Assets across the organization.

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