Senior Data Engineer – AI/ML Pipelines & Scalable Backend

Link Group; Warszawa; On-site; PLN 170,000 - 250,000; Full time

Benefits offered by this job

Life Insurance

Cafeteria system

Job summary

Link Group seeks a senior backend engineer to design and own scalable systems powering investment and AI-driven applications. You will build reliable microservices, APIs, and data pipelines across batch and streaming workloads, collaborating with cross-functional teams to move from prototype to production.

The role requires strong coding skills in Java, Python, or Go, plus hands-on AI/ML in production, cloud experience, and a focus on performance, security, and observability.

Qualifications

• 5+ years of backend or software engineering experience.
• Experience building data pipelines (batch and streaming).
• Hands-on experience with AI/ML or generative AI in production environments.
• Strong coding skills in Java, Python, or Go.
• Experience with cloud platforms, Docker, and container orchestration.
• Knowledge of CI/CD, testing, and infrastructure automation.
• Strong SQL and data modelling skills.
• Good communication and collaboration skills.
• Eligibility to work in Poland (Warsaw office).
• High ethical standards.

Responsibilities

• Build and maintain scalable backend systems supporting investment and AI-driven applications, owning them end-to-end.
• Develop batch and streaming data pipelines for ingestion, processing, and delivery across systems and models.
• Implement and integrate generative AI and LLM solutions, including APIs, embeddings, and production workflows.
• Design and maintain reliable microservices and APIs with a focus on performance, scalability, and security.
• Improve system stability through monitoring, observability, and performance optimisation.
• Collaborate with cross-functional teams to move solutions from prototype to production.
• Start ASAP.
• Life Insurance
• Cafeteria system.

Skills

AI/ML

GenAI

Java

Python

Go

Docker

CI/CD

Testing

SQL

Data modeling

English

Data pipelines

Tools

Docker

Job description

Link Group seeks a senior backend engineer to design and own scalable systems powering investment and AI-driven applications. You will build reliable microservices, APIs, and data pipelines across batch and streaming workloads, collaborating with cross-functional teams to move from prototype to production.

The role requires strong coding skills in Java, Python, or Go, plus hands-on AI/ML in production, cloud experience, and a focus on performance, security, and observability.