Machine Learning Engineer

Calyptus; Poland; On-site; PLN 212,000 - 298,000; Full time

Job summary

A leading technology firm in Poland is seeking an experienced Machine Learning Engineer to lead the design and deployment of end-to-end ML systems for enterprise applications. The ideal candidate will possess strong Python development skills, experience with data wrangling, and familiarity with Deep Learning frameworks. This role involves mentoring engineers and collaborating with cross-functional teams to translate enterprise needs into effective machine learning solutions.

Qualifications

• Strong knowledge of data structures, algorithms, and CI/CD pipelines.
• Experience with supervised and unsupervised learning and model evaluation.
• Knowledge of Deep Learning frameworks such as PyTorch.

Responsibilities

• Lead the design and deployment of end-to-end ML systems.
• Apply large language models effectively and develop robust strategies.
• Ensure ML solutions meet enterprise standards for security and compliance.
• Mentor engineers and influence technical strategy.

Skills

Python development

Data wrangling (SQL, pandas, NumPy)

Supervised and unsupervised learning

Model evaluation

Feature engineering

Deep Learning (PyTorch)

MLOps

Kubernetes

Linear algebra

Probability and statistics

Effective communication

Job description

Co-Founder @ Calyptus | High Performance Talent at Scale | Blockchain & AI

Job Overview

We are looking for a skilled Machine Learning Engineer to lead the design and deployment of end-to-end ML systems for enterprise applications.

What You’ll Do

• Lead the design and deployment of end-to-end ML systems for enterprise applications, from experimentation to production.
• Apply large language models (LLMs) effectively by fine-tuning and evaluating domain-specific models, developing robust prompt engineering and orchestration strategies, and optimizing inference pipelines for latency, throughput, and cost efficiency.
• Write production-quality software with strong engineering rigor, including clean APIs and reliable systems, while collaborating closely with product engineers.
• Build high-reliability ML infrastructure, including training pipelines, model registries, observability, and CI/CD for ML.
• Ensure ML solutions meet enterprise standards for security, compliance, data privacy (e.g., SOC2, GDPR), explainability, and auditability.
• Develop evaluation and monitoring frameworks to measure accuracy, fairness, robustness, and drift in deployed models.
• Partner with product and GTM teams to identify high-value enterprise use cases for ML and translate them into scalable solutions.
• Collaborate directly with customer-facing teams to deliver high-impact enterprise projects.
• Mentor engineers and raise the bar for technical excellence across the organization.
• Influence technical strategy and help define the company’s long-term AI roadmap.

Who You’ll Be

• An experienced Python developer with strong knowledge of data structures, algorithms, and CI/CD pipelines.
• A Machine Learning professional skilled in data wrangling (SQL, pandas, NumPy), supervised and unsupervised learning, model evaluation, and feature engineering.
• Knowledgeable in Deep Learning frameworks such as PyTorch, with experience in neural networks and NLP models; exposure to generative and multi-modal models is a plus.
• Experienced in MLOps, including model serving, orchestration (Kubernetes), and experiment tracking, with the ability to design and deliver large-scale ML systems focused on cost optimization and reproducibility.
• Equipped with a solid foundation in linear algebra, probability, statistics, and calculus.
• An effective communicator who can translate technical concepts into clear business value and collaborate with non-technical stakeholders.
• A mentor and leader who provides guidance through code reviews, architectural decisions, and technical direction.

Equal Employment Opportunity

We are an equal opportunities employer and welcome applications from all qualified candidates.