Senior Java Backend Developer / Solution Architect
Aleja Pokoju 18, Kraków
Ready4S
About the Project
We are seeking a Senior Java Backend Developer with strong architecture and data modeling skills, who will also play a key role in collaborating with business stakeholders and supporting the due diligence process for a strategic platform transformation.
The goal is to replace a complex and incomplete legacy system with a modern, clean REST API layer that integrates with Palantir Foundry. You will work at the intersection of telecom-standard data models (TMF) and platform-native object modeling (Palantir).
Beyond implementation, you will actively contribute to architectural decisions, validate design assumptions with business stakeholders, and ensure that the system meets both functional and strategic objectives.
This is an opportunity to co-shape the architecture and business alignment before the first production release, and to take part in a long-term modernization effort.
Responsibilities
Act as a senior engineer and architectural partner, helping shape the system design and technical roadmap
Participate in due diligence activities, validating requirements and aligning technical solutions with business needs
Design and build REST APIs in Java that act as a bridge between an orchestration application and Palantir Foundry
Translate TMF-based logical models into physical object structures within Palantir
Collaborate with platform engineers, architects, and business stakeholders to define scalable data access and integration patterns
Work with SDKs (not just REST APIs) to interact with Palantir's backend
Ensure clean code practices and architecture-first design from the start
Requirements
7+ years of experience in Java backend development
Proven experience in system and API architecture design
Strong background in data modeling – logical and physical
Experience in working closely with business teams and supporting due diligence processes
Familiarity with domain-driven design and telecom data models (e.g., TMF) or willingness to learn quickly
Experience working with SDKs or platform-specific APIs
Technical education (engineering degree or equivalent in IT, computer science, or related field)
Nice to Have
Knowledge of Palantir Foundry
Understanding of TMF (TeleManagement Forum) specifications
Experience with platform-based development environments (e.g., Salesforce, Mendix, OutSystems)
Familiarity with API security (OAuth 2.0, tokens)
Why Join This Project?
High-impact senior role with strong influence on architecture and business alignment
Involvement in due diligence and early design decisions before v1 goes live
Long-term potential
No legacy maintenance – focus on clean code, scalability, and clarity
Exposure to Palantir Foundry – one of the most in-demand enterprise data platforms
Senior Java Backend Developer / Solution Architect
Senior Java Backend Developer / Solution Architect
Aleja Pokoju 18, Kraków
Ready4S