Sigma Software Group

Senior / Principal Machine Learning Engineer

Sigma Software Group · Kyiv, Kyiv city, Ukraine
Kyiv, Kyiv city, Ukraine Closed
Applications are closed for this role. It was originally posted 2026-07-09. It’s no longer accepting applicants — see roles Sigma Software Group is still hiring for →, or browse the live openings below.
Type
Full-time
Experience
6+ yr
  • Design, develop, and optimize scalable Machine Learning models for advertising intelligence and forecasting systems
  • Analyze large-scale historical and real-time datasets to improve forecasting accuracy and monetization strategies
  • Build and maintain distributed data processing pipelines using Spark and related Big Data technologies
  • Develop production-ready ML solutions using Python within AWS cloud infrastructure
  • Research, evaluate, and implement Machine Learning algorithms suitable for high-load AdTech environments
  • Improve model performance, scalability, reliability, and operational efficiency
  • Collaborate with Data Engineers, Product Managers, and distributed engineering teams to deliver end-to-end ML solutions
  • Contribute to ML architecture decisions, experimentation approaches, and engineering best practices
  • Monitor, validate, and optimize ML model quality and forecasting performance in production environments
  • Produce technical documentation related to ML pipelines, models, and distributed systems
  • Mentor engineers and support technical growth within the team
  • Drive innovation in Machine Learning and AdTech technologies
  • 6+ years of commercial experience in Machine Learning and Big Data engineering
  • Strong hands-on experience with machine learning algorithms implementation using Python
  • Proven experience with Apache Spark and large-scale distributed data processing
  • Experience working with distributed messaging systems such as Kafka
  • Strong knowledge of AWS cloud services and cloud-native architectures
  • Experience designing and developing large-scale distributed or mission-critical systems
  • Solid understanding of software engineering principles, SDLC, and Agile methodologies
  • Strong analytical thinking and problem-solving skills
  • Ability to work independently and take ownership of complex technical solutions
  • Good communication and collaboration skills
  • Upper-Intermediate or higher English level

WILL BE A PLUS:

  • Experience with Golang
  • Experience in AdTech, online advertising, or media platforms
  • Experience with forecasting systems or recommendation engines
  • Experience optimizing ML models for large-scale production environments

Ready to work on machine learning solutions powering large-scale video advertising platforms used by millions of viewers worldwide?

We are looking for a Senior / Principal Machine Learning Engineer to join a distributed engineering team working on intelligent forecasting and advertising optimization systems. In this role, you will contribute to high-load cloud-native solutions processing billions of daily requests and terabytes of data.

We at Sigma Software offer the opportunity to work with cutting-edge ML and Big Data technologies, collaborate with international experts, and influence technical decisions within a complex AdTech ecosystem.

CUSTOMER

Our Customer is a leading technology company in the television and digital advertising industry focused on helping media companies monetize premium video content. The platform supports high-quality video delivery across smart TVs, OTT devices, mobile applications, set-top boxes, and desktop environments. The Customer operates a large-scale distributed ecosystem that combines machine learning, cloud technologies, and advanced analytics to optimize advertising efficiency and audience targeting.

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