Software Engineer 1 (ML Engineering)

Location: Warsaw, Poland. Hybrid 4/1 model with flexible hours starting between 7:00 a.m. and 10:00 a.m.; up to 30 days of occasional remote work.

Salary: PLN 11,200–15,250 per month under an employment contract, depending on skill set; annual performance and company-results bonus.

Company

hirify.global operates a large-scale online marketplace and develops products used by millions of customers.

What you will do

• Design, build, and optimize high-availability backend systems handling thousands of requests per minute.
• Own recommendation-focused microservices end to end, from design through deployment and operation.
• Build infrastructure for serving ML models and integrate it with microservices and recommendation systems.
• Process large-scale offline data using BigQuery and Apache Spark.
• Use vector search databases for high-speed retrieval and personalized user experiences.
• Work closely with the Machine Learning team in an autonomous agile environment.

Requirements

• Professional programming experience with Kotlin or Java and willingness to master Kotlin in a greenfield project.
• Interest in high-quality code, code reviews, and software engineering best practices.
• Ability to find effective solutions to user requirements and continuously develop technical knowledge.
• Willingness to develop soft skills and learn backend, frontend, and mobile technologies.
• Interest in ML Engineering, including serving ML models with Python and large-scale offline data processing with BigQuery or Apache Spark.
• English at minimum B2 level.
• Openness to using AI coding assistants in daily work.

Nice to have

• Experience with Kotlin, Spring, Kafka, Kubernetes, distributed systems, data streaming, algorithmic optimization, microservices, ML model serving, BigQuery, Apache Spark, or vector search databases.

Culture & Benefits

• Autonomous agile team following a “you build it, you run it” ownership model.
• Long-term discretionary incentive plan based on hirify.global.eu shares and an annual performance-based bonus.
• Medical, sports, lunch, insurance, and voucher benefits through a cafeteria plan.
• Company-paid English classes, training budget, hackathons, inter-team learning, and an internal learning platform.
• MacBook Pro or corresponding Dell equipment, ergonomic office facilities, and modern engineering tools.
• Additional volunteering day and social events.

Hiring process

• Submit a CV and meet the team online.