Integration Developer

Billennium; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Udemy for Business

Private medical care

Multisport card

Veterinary package

Language lessons

Shopping vouchers

Remote/hybrid work options

Career growth opportunities

Global collaboration

Innovative environment

Team-building events

Annual Mazury company event

Welcome pack

Job summary

Billennium in Warsaw is seeking experienced Integration Developers to join a team building an automated production system for advertising newspapers. The project collects advertisements, determines page layouts, generates editorial content with AI, and produces a print-ready PDF.

You'll work with Python backend, OR-Tools CP-SAT, React + TypeScript frontend, PostgreSQL, AWS (EKS), LangGraph, LiteLLM, Langfuse, Redis and Grafana, and collaborate with an international team.

Qualifications

• Experience in publishing, press, printing, media, or a similar industry is highly desirable.
• Python for backend, solver and pipelines
• OR-Tools CP-SAT for constraint solving
• React with Vite and TypeScript for the frontend
• PostgreSQL
• AWS, running in the client's own subscription, on EKS
• LangGraph for agent orchestration, LiteLLM as gateway, Langfuse for tracing
• Redis, Grafana
• Strong English skills, ideally C1

Skills

Python

React

English proficiency

Tools

PostgreSQL

AWS

LangGraph

LiteLLM

Langfuse

Redis

Grafana

OR-Tools CP-SAT

Vite

TypeScript

Job description

More about us

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

About the role

We're looking for experienced Integration Developers to join our team. The goal of the project is to automate the production of advertising newspapers. The system collects advertisements and inserts, calculates the optimal page layout, generates and places editorial content using AI, and ultimately produces a print-ready PDF.

Requirements / Tech Stack

• Experience in publishing, press, printing, media, or a similar industry is highly desirable.
• Python for backend, solver and pipelines
• OR-Tools CP-SAT for constraint solving
• React with Vite and TypeScript for the frontend
• PostgreSQL
• AWS, running in the client's own subscription, on EKS
• LangGraph for agent orchestration, LiteLLM as gateway, Langfuse for tracing
• Redis, Grafana
• Strong English skills, ideally C1

Surrounding systems to be connected, all on the client side

• Advertising system — delivers order data as XML plus print PDFs via a file transfer into an S3 bucket; also holds the insert allocation plan per distribution district.
• Archive system — for reused editorial content and full-page supplied PDFs such as the puzzle page.
• Client AI pipeline — for short local texts, delivers the editorial content.
• Cinema & event data sources — provide additional local content.
• Printing house — as the output target.
• Client IT service provider — is involved in providing several of these data feeds.

Output

The system must automatically produce 300 DPI PDF/X-3 files that are ready for printing, with no manual rework. This is a hard requirement.

Perks and benefits

• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
• Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
• Global collaboration - work with a diverse, international team.
• Innovative environment - be part of a forward-thinking and growth-oriented workplace.
• Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
• Team-building events including our company tradition (annual company event in Mazury).
• A pleasant surprise to start your journey with us in the form of a welcome pack.

Recruitment process

• HR call
• Technical Interview
• Interview with the dedicated Client
• Final decision/ Feedback