Machine Learning Engineer – LLM Systems & Research

Our mission

Constructor’s mission is to enable all educational organisations to provide high-quality digital education to 10x people with 10x efficiency.

With strong expertise in machine intelligence and data science, Constructor’s all-in-one platform for education and research addresses today’s pressing educational challenges: access inequality, tech clutter, and low engagement of students.

Our headquarters is located in Switzerland, and we also have legal entities in Germany, Bulgaria, Serbia, Turkey, and Singapore

Please send your resume in English only.

We are seeking a talented and experienced Machine Learning Engineer specializing in Large Language Model systems engineering and applied research. The successful candidate will be responsible for implementing and maintaining LLM-based system components, with opportunities to contribute to research initiatives in educational and research domains.

Project Overview

You will be working on production-grade LLM systems that serve research institutions and educational organizations. This includes contributing to scalable inference systems under senior guidance, optimizing model performance, building robust ML pipelines, and contributing to applied research in educational AI. The role emphasizes engineering excellence with research-driven innovation.

Responsibilities:

• ML Systems Support: Implement and maintain components of LLM inference systems under senior guidance, including model optimization and performance monitoring.
• Model Deployment: Deploy and configure model serving solutions using established frameworks. Support optimization efforts for latency and throughput.
• MLOps Implementation: Contribute to ML pipeline development and maintenance. Implement monitoring and evaluation components.
• Research Support: Support research initiatives by implementing prototypes and helping translate research concepts into production-ready components.

Required Qualifications

Education & Experience:

• Bachelor’s or Master’s degree in Computer Science, Machine Learning, Software Engineering, or related field
• 2-4 years of Machine Learning Engineering experience
• Experience with LLM frameworks and deployment (production experience preferred but not required)

Technical Skills:

• Programming & ML: Proficient Python, experience with PyTorch/TensorFlow and Transformers
• Deployment: Experience with Docker, cloud platforms, and basic model serving
• Software Engineering: Testing, API design, version control

Preferred Qualifications:

• Interest in model optimization and performance tuning
• Exposure to research environments or educational AI applications
• Experience with monitoring and basic performance optimization
• Previous work in EdTech, learning platforms, or academic settings

What You’ll Build:

• System Components: Develop and maintain components of LLM serving infrastructure
• Platform Features: Implement features for learning platforms with mentorship
• Pipeline Components: Build data processing and monitoring pipeline components

Technical Environment:

• Languages: Python, Rust, SQL, YAML/JSON
• ML Stack: PyTorch, Transformers, ONNX, TensorRT, Distributed training frameworks
• Infrastructure: Kubernetes, Docker, Cloud platforms (AWS/GCP/Azure), GPU clusters
• Data: PostgreSQL, Redis, Vector databases, S3/GCS, Data streaming (Kafka/Kinesis)
• Monitoring: Prometheus, Grafana, ELK stack, MLflow, Weights & Biases

What we offer:

• Competitive salary.
• Comprehensive health insurance.
• Choice of equipment ( i.e. laptop, monitor, etc).
• Flexible working schedule.
• International company with large-scale projects and global clients.
• Community of passionate experts to exchange knowledge and expertise with.
• Opportunity to contribute to the better future of education together with a friendly and open-minded team.

Hybrid work in locations with offices (2 days in-office, 3 days remote):

• Sofia: 59 G. M. Dimitrov Blvd., NV Tower, 8th floor, 1700
• Belgrade: Makedonska 12, 11000 Belgrade, Serbia
• Istanbul: Rüzgarlı Bahçe Mah., Kavak Sok., Smart Plaza B Blok 31/B, 34805 Kavacık-Beykoz/İstanbul
• Sakarya: Esentepe Mh., Akademiyolu Sk., Teknoloji Geliştirme Bölgesi No. 10 D/206, Serdivan, Sakarya
• Izmir: Ege Üniversitesi Kampüsü, Erzene Mah., Ankara Cad., No:172/67, 35100 Bornova/İzmir

Constructor fosters equal opportunity for people of all backgrounds and identities. We are led by a gender-balanced board committed to building a diverse and inclusive organisation where everyone can become their best self. We do not discriminate based on age, disability, gender identity, sexual orientation, ethnicity, race, religion or belief, parental and family status, or other protected characteristics. We welcome applications from women, men and non-binary candidates of all ethnicities and socio-economic backgrounds. We encourage people belonging to underrepresented groups to apply.