Senior Technical Expert Java

As a Senior Technical Expert, you will be the technical cornerstone of our Data Marketplace —a platform built on Data Mesh principles. You will guide the evolution of a "shop-for-data" experience, moving our architecture from a robust Modular Monolith to a distributed Microservices ecosystem. You’ll be working with a cutting-edge stack (Java 21, AWS, AI-enhanced search) to ensure that "buying" digital assets is as seamless for our users as a consumer e-commerce experience. The end-goal is to build a comprehensive solution that enables FAIR data access to Digital Assets across the organization.

Key Responsibilities

• Architectural Evolution: 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 as you cooperate with a multidisciplinary team to deliver end-to-end experiences to the End Users.

• Lead Development: Write clean, high-performance code using Java 21+ features (Virtual Threads, Pattern Matching) to handle complex data transactions.

• Search & AI Innovation: Work on the roadmap to integrate AI/LLM capabilities into our search engine ( Sinequa ), enabling users to explore data assets via natural language and intelligent discovery.

• Data Stewardship: Oversee the polyglot persistence layer, optimizing PostgreSQL for relational integrity and MongoDB for flexible metadata storage.

• Cloud Leadership: Design and maintain scalable infrastructure within AWS , ensuring our CI/CD pipelines and deployment strategies are best-in-class.

• Mentorship: Act as a force-multiplier for the team, conducting rigorous code reviews and setting the standard for technical excellence.

Requirements

Technical Requirements

• 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

Who You Are

• A Technical Visionary: You don't just solve today's bugs; you anticipate where the architecture will break two years from now.

• Data-Centric: You understand that in a Data Mesh, the product is the data itself. You care about metadata, lineage, and discoverability.

• User-Centered: You care about the end users experience and can cooperate with UX and Frontend developers to map and deliver first-in-class solutions.

• Pragmatic Architect: You know when to stick with a monolith for speed and exactly when the "swell" justifies a move to microservices.

• AI Curious: You are excited about moving beyond keyword search into the realm of semantic search and AI-driven data exploration.

The Roadmap: What You’ll Build

• Phase 1: Refine the modular boundaries of the current Java 21 application. Deliver scalable and extensible transaction modules enabling Request-to-Use processes within the DataMarketPlace

• Phase 2: Orchestrate the "Great Migration"—consolidate existing Marketplace ecosystems into DataMarketPlace on-boarding tens of thousands of assets and thousands of users.

• Phase 3: Integrate AI-driven exploration features atop our Sinequa search layer.

Salary: 22 000 - 33000 PLN + VAT (B2B) Originally posted on Himalayas