Jovan Spasojevic

Jovan Spasojevic  new_releases

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Co-Founder and CTO @ ctnsoft 2025 | Staff Machine Learning Engineer | 10 years taking AI products from concept to production
Obrenovac, Serbia

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Jobs verified_user 0% verified
  • c
    Co-Founder and CTO
    ctnsoft
    Apr 2026 - Current (7 months)
    ConstructOS is a configure-to-order platform for building-product manufacturers (steel halls, timber frames) that carries a single data model from design brief to manufacturing files: parametric 3D configuration, engineering rule validation, pricing, quotation, and bill of materials (BOM) output. Developed and shipped the working product solo; live at constructos-9ul.pages.dev.
    • Built a browser-based parametric 3D configurator with a deterministic rule engine that validates every design and returns actionable fix hints instead of simple rejections.
    • Enabled open BIM interoperability: IFC 4 exports pass IfcOpenShell validatio
  • Wunderkind
    Staff Machine Learning Engineer
    Wunderkind
    Aug 2022 - Apr 2026 (3 years 9 months)
    • Increased conversion rates by 17% and migrated 5 enterprise clients off the legacy system by building a Transformer-based send-time model with a custom ranking loss and hard-example mining for rare conversions; the system serves approximately 430,000 sends daily.
    • Delivered models, MLOps pipelines, and runtime services for 24 brands on infrastructure that processes over 2 trillion digital events per year, scaling 5 brands to fully AI-driven delivery.
    • Established the experimentation and delivery framework (A/B testing, staged rollouts, monitoring, and exploration-exploitation strategies) that moved 9 successive timing-model generations into production.
    • Engineered a high-fidelity simulator of the marketing delivery workf
  • BioAge Labs
    Senior Data Scientist and Backend Developer
    BioAge Labs
    Apr 2019 - Oct 2022 (3 years 7 months)
    • Created a proprietary machine learning platform that identified drug targets through predictive analysis of large omics datasets integrated with public data; this work underpinned the in-licensing of 3 clinical-stage molecules, 2 publications, and 3 provisional patents.
    • Built a cross-dataset analysis and visualization tool that combined a high-performance backend caching layer with a responsive front end for research scientists.
    • Optimized novel statistical methods from the scientific literature and packaged internal tools to make them accessible across the company.
    • Managed the intake, processing, and warehousing pipeline for over 100 GB of diverse biological data using Python, R, PostgreSQL, and MySQL, and added high-
  • B
    Freelance Software Engineer
    Burner IT
    Nov 2015 - Apr 2019 (3 years 6 months)
    • Developed OAuth-protected REST APIs and a full-stack Django web application with PostgreSQL for an online voting game; deployed and operated the service on AWS with CI/CD pipelines, load testing, logging, and automated deployments.
    • Architected a blockchain application for a European government authority, covering end-to-end design and integration with core systems.
    • Designed a GDPR-compliant digital identity management system using zero-knowledge proofs, and delivered a blockchain service for drone air traffic management for a European public-sector organization.
    • Benchmarked Hyperledger Fabric performance across transaction volumes, channel counts, endorsement policies, and state database types, and released a reusable
Education verified_user 0% verified
  • Singidunum University
    Bachelor of Science, Data Science
    Singidunum University
    Oct 2011 - Jun 2016 (4 years 9 months)