Hi there! ๐
I'm Miloลก Belฤeviฤ (MBL)
Senior Product Expert | Management Science researcher
PhD researcher in operations research, turning data and decision models into better product and business decisions. Based in Belgrade, Serbia.
๐งโ๐ผProfile
Senior product management expert with over a decade of experience driving the development, launch, and scaling of innovative solutions for organizations ranging from an MIT spinoff to S&P 500 corporations. Professional experience includes leading product initiatives involving APIs, microservices migration, hardware experimentation, and operational process improvement. Currently pursuing a PhD in Operations Research, focusing on decision support systems and multi-criteria decision-making in product development and backlog prioritization, connecting scientific methods with industry practice. Holds 2 masterโs degrees: in engineering management, and in marketing and communication. Published author, mentor, and recognized international speaker at TEDx and over 20 conferences across 8 countries.
๐Experience
Toptal
Apr 2022 โ presentTop 3% talent network
Senior Product Expert
- Drove product strategy and business-model validation for 6+ ventures across HealthTech, EdTech, Logistics, Life Sciences and FinTech.
- 2,500+ billable hours with strong client retention.
Rewardful
Mar 2026 โ Sep 2026Affiliate marketing SaaS, part of saas.group
Senior Product Manager (interim)
- Planned a staged business-model transition from affiliate-management tool to network-powered marketplace.
- Assessed, documented and improved product and development processes.
Urban Sports Club
Sep 2025 โ Jan 2026Millions of members, 10k+ partners, 7 countries
Staff Product Manager (interim)
- Led a multi-phase monolith-to-microservices migration targeting reliability, error rate, scalability and lead-time metrics.
- Surfaced new product opportunities, moving the team from maintenance to measurable high-impact delivery.
Feldspar
AI-powered hardware for athletic performance
Fractional Head of Product
Sep 2024 โ Sep 2025- Managed three hardware development streams with external vendors, coordinating delivery against time and budget constraints, aligning with internal data science and software development team
Product and Operations Lead
Apr 2024 โ Sep 2024- Led experimentation phases to validate technical assumptions; SOPs cut workflow cycle times by ~30%.
Clarivate
Jun 2022 โ Apr 2024Global provider of enriched data, insights & analytics
Senior Product Manager, API
- Owned API strategy for high-volume data endpoints serving millions of calls per month.
- Coordinated requirements across 5+ tech teams; promoted from PO to Senior PM within 6 months.
Various clients
Aug 2019 โ Jun 20223,000+ billable hours, B2B & B2C
Product Management Consultant
- Crowdbotics โ technical specs, API integrations, agile delivery (18 months).
- Nanoramic Laboratories (MIT spinoff) โ 0-to-1 discovery and system design of an in-house ERP.
- Kampster โ platform redesign and AI-feature discovery for 450,000+ users.
Opinodo
Feb 2017 โ Aug 2019Survey & membership platforms, 500k+ users
Chief Operations Officer
- Led survey-partner integration and expansion into 10+ countries.
- Built a distributed team of 7 staff and 15 freelancers.
Various clients
May 2015 โ Feb 2017(Product) Marketing Consultant
๐Education
PhD candidate โ Operations Research & Management Science
Nov 2024 โ nowFaculty of Organizational Sciences, University of Belgrade
MSc Engineering Management
2017 โ 2019Singidunum University ยท GPA 9.75/10
MSc Marketing & Communication
2016 โ 2017Singidunum University ยท GPA 25.6/30
BA
2011 โ 2016University of Belgrade ยท GPA 8.12/10
Certifications
- Certified Product Innovation Professional โ Spark Engine, 2026
- Certified Agile Leader 1 โ Scrum Alliance, 2024
- Lean Agile Visual Management โ Modus Institute, 2023
- Senior Product Manager โ Product School, 2022
- Certified Kanban Professional โ Kanban University, 2020
- Certified Scrum Professional โ Scrum Alliance, 2020
- Certified ScrumMaster โ Scrum Alliance, 2018
Memberships
- Institute for Operations Research and the Management Sciences (INFORMS)
- Product Development and Management Association (PDMA)
- Academy of Management (AOM)
- Agile Alliance