Location: Bulgaria Departments: Research & Development

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.

At Constructor Tech, we aim to revolutionize scientific discovery by empowering researchers with intelligent, agentic AI assistants. Our platform unifies literature mining, knowledge mapping, hypothesis generation, computational experimentation, results analysis, and publication support into a seamless, extensible environment. We’re seeking a seasoned ML engineer to help architect and build this next-generation research companion.

Role Overview

As a Machine Learning Engineer on our Agentic AI team, you will design, develop, and deploy the core platform that orchestrates autonomous AI agents and toolchains for diverse scientific workflows. You’ll collaborate closely with research scientists, data engineers, UX designers, and DevOps to turn cutting‑edge AI research into production‑grade features that accelerate literature review, knowledge graph construction, gap detection, computational modelling, and publication drafting.

Key Responsibilities:

• Platform Architecture & Development - Architect and implement a modular, microservices‑based agentic AI platform supporting multi‑agent orchestration.
  • Develop robust APIs and SDKs enabling seamless integration of AI assistants and external tools (e.g., literature databases, simulation engines).
• AI Agent & Tool Integration - Build and integrate autonomous agents leveraging large language models (LLMs), retrieval‑augmented generation, and reinforcement learning for task planning and execution.

  • Incorporate specialized tools for:

    • Literature Research: automated document retrieval, semantic search, summarization.
    • Knowledge Mapping: dynamic knowledge graph construction, entity linking, relationship inference.
    • Gap Finding & Hypothesis Generation: algorithmic identification of under‑explored research areas.
    • Computational Research Pipelines: integration with simulation, statistical, and data‑analysis tools (e.g., Jupyter, SciPy, custom workflows).
    • Results Analysis & Publication: data visualization modules, automated report and manuscript drafting.
• Model Development & Optimization - Fine‑tune and benchmark LLMs, graph neural networks, and other deep learning architectures for domain‑specific tasks.
  • Implement efficient inference pipelines, caching strategies, and batching for real‑time interactivity.
• Collaboration & Best Practices - Work in cross‑functional Agile teams; participate in design reviews, sprint planning, and code reviews.
  • Ensure high code quality, unit/integration testing, and continuous integration/deployment (CI/CD).
  • Document system designs, APIs, and operational runbooks.

Required Qualifications:

• Education: Bachelor’s or Master’s in Computer Science, Machine Learning, AI, physics, chemistry or biology (PhD preferred).
• Experience: - 3+ years developing production‑scale ML/AI systems, ideally involving agentic or multi‑agent frameworks.
  • Proven track record with LLMs (e.g., GPT, T5), RAG architectures, and knowledge graph technologies.
• Technical Skills: - Programming: Expert in Python; familiarity with Rust, Go, or TypeScript a plus.
  • Frameworks & Libraries: PyTorch or TensorFlow; LangChain, LlamaIndex, Haystack, or similar.
  • Data & Infrastructure: Elasticsearch, Neo4j or other graph databases; Docker, Kubernetes; AWS/GCP/Azure.
  • Tooling: RESTful APIs, gRPC, message queues (e.g., RabbitMQ, Kafka).
• Soft Skills: - Strong problem‑solving, communication, and collaboration abilities.
  • Comfort working in fast‑paced, research‑driven environments with evolving requirements.

Preferred Qualifications:

• PhD in AI/ML, Computational Science, or a scientific domain (biology, chemistry, physics).
• Experience in academic publishing or research support tools.
• Contributions to open‑source AI frameworks or scientific software.
• Familiarity with continuous learning pipelines and MLOps best practices.

What We Offer:

• Competitive salary and equity packages

• Comprehensive health, dental, and vision benefits

• Flexible remote‑first work environment with optional hub offices

• Generous professional development budget (conferences, courses)

• Collaborative culture at the intersection of AI and scientific discovery

• Choice of work equipment (e.g., laptop, monitor, etc.)

• English classes (iTalki – $130 monthly)

• Flexible schedule (we usually work between 09:00/10:00 and 18:00/19:00 CET or EET)

• Newborn bonus (€500 per child)

• Patent remuneration

• Paid leave

• Remote work in locations without our offices

• 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