Java Fullstack Developer

ITFS Inc; Town of Poland (NY); On-site; USD 45,627 - 53,232; Full time

Benefits offered by this job

Transparent terms of cooperation

Opportunity to work on a development project

Co-financing for healthcare packages

Job summary

ITFS Inc is looking for a Java Fullstack Developer to design and develop web applications using Java for the backend and React for the frontend. The role includes creating and integrating APIs, maintaining databases, and ensuring application performance. You will work in a hybrid model, meeting once a week at the client’s office in Warsaw or Poznań. The successful candidate will have experience in building conversational web applications and collaborating in a team. The position offers transparency in terms of cooperation and optional benefits for health packages.

Qualifications

• Experience in building web applications with conversational elements.
• Ability to design ergonomic UI for data, including tables and charts.
• Familiarity with CI/CD and incident response in a production environment.

Responsibilities

• Design and development of web applications in Java and React.
• Creating and integrating APIs (REST) and maintaining databases.
• Collaborating with teams for system implementation and testing.

Skills

React

Java

API design and development

SQL

Git

CI/CD

Docker

Kubernetes

Job description

Place of work: Poland, Mazovian Voivodeship, Greater Poland Voivodeship

Form of employment: B2B with ITFS

Category: IT

• Position: Java Fullstack Developer
• Location: hybrid, once a week from the client's office in Warsaw or Poznań
• Start date: June 1, 2026
• Form of cooperation: B2B with ITFS, long‑term cooperation
• Rate: PLN 120-140 net + VAT/h
• Working hours: standard (8:00 AM - 4:00 PM)
• Client: banking industry
• Recruitment process: phone call with ITFS (approx. 20 min.) → technical interview with the Client's Tech Leader → decision making

Scope of responsibilities

• Design and development of web applications in Java (backend) and React using the frontend framework.
• Creating and integrating APIs (REST), maintaining databases, and ensuring application performance and security.
• Collaborating with the team (testers, DevOps, UX) on system implementation, testing, and maintenance.

Sought-after competences

• Frontend knowledge: React
• Experience in building web applications with conversational elements (chat): response streaming, conversation history, user feedback, presentation of sources/justifications
• Backend experience: Java – design and development of API services
• Basic knowledge of working with BigQuery/SQL
• Ability to design ergonomic UI for data: tables, charts, drilldown, export results
• Teamwork experience: Git, code review, quality standards, documentation, testing (unit/integration/e2e)
• Experience in a production environment: CI/CD, monitoring/logging, incident response
• Willingness to collaborate with AI Engineers and data teams (API contracts, data formats, validations, cost constraints)

Preferred

• Knowledge of semantic/metrics layer solutions - semantic layer, caching, pre‑aggregations, metrics governance
• Knowledge of "conversational analytics" tools / product patterns for "chat with data": citations, "show SQL", explore vs. answer modes, trust scoring
• Knowledge of UI and data‑viz libraries
• Knowledge of GCP: Cloud Run, Pub/Sub
• Basics of containerization and implementation: Docker/Kubernetes
• Experience in a regulated environment (banking): audit, compliance, data classification, security processes

We offer

• Transparent terms of cooperation
• Opportunity to work on a development project
• Optional benefits (co‑financing for Enel‑med and Multisport healthcare packages, and a basic accounting package – free for up to three invoices per month)