Денис

Denys Bubnov
Product Engineer/Logistics Manager
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Porto, Portugal | [відкрити контакти](див. вище в блоці «контактна інформація»)

PROFESSIONAL SUMMARY

Product Engineer with experience building AI-powered products end to end, combining full-stack development, LLM integration,
RAG pipelines, and strong product thinking. Skilled at turning ideas into production-ready features, improving user workflows, and
automating repetitive tasks through practical AI solutions. Proven ability to collaborate with cross-functional teams and ship scalable
products with measurable impact.

WORK EXPERIENCE

AI Product engineer Mar 2026 - Jul 2026
Devlon Portugal
- Built and shipped AI-powered features using LLMs (RAG, agents), improving user workflows and reducing manual effort
- Designed and optimized prompt engineering pipelines, increasing response accuracy and consistency
- Developed end-to-end AI products (from concept to production), integrating APIs, backend logic, and user-facing features
- Implemented evaluation frameworks to measure AI performance, reducing hallucinations and improving output quality
- Built AI-driven automation tools that streamlined internal processes and increased team productivity
- Integrated LLM capabilities into existing products, enhancing search, summarization, and content generation
- Collaborated with product and design teams to define AI feature requirements and deliver user-centric solutions
- Defined success metrics and KPIs for AI features, ensuring measurable product impact
- Optimized latency, cost, and quality of AI systems in production environments

IT Support Engineer (Self-Service Terminals) Apr 2016 - Aug 2018
Tyme Kyiv, Ukraine
- Provided technical support for self-service terminals, ensuring stable operation and minimizing downtime
- Diagnosed and resolved hardware and software issues, improving system reliability and user experience
- Monitored terminal performance and proactively identified potential failures
- Performed maintenance and troubleshooting of network-connected devices in real-world environments
- Collaborated with engineering teams to escalate and resolve complex technical issues
- Ensured high availability of payment/transaction systems used by end customers
- Installed, configured, and maintained computer systems and network equipment

Head of logistics department May 2020 - Oct 2022
Dentro/Tikane
- Department & Operational Leadership: Directing overall end-to-end logistics operations, managing team performance, and driving
cross-functional alignment between transportation, warehouse operations, and customer service.
- Supply Chain & Transportation Management: Overseeing fleet logistics, route optimization, freight scheduling, and carrier
management to ensure maximum operational efficiency and on-time delivery (OTD).
- Cost & Budget Control: Managing logistics budgets, monitoring unit economics, and executing cost-reduction initiatives across
fuel, maintenance, and third-party logistics (3PL) partners.
- Process Optimization & Strategy: Scaling daily dispatch and routing procedures, standardizing workflows, and handling escalation
for complex transport challenges and critical operational bottlenecks.
- Vendor & Partner Management: Negotiating long-term SLAs and contracts with logistics service providers, brokers, and equipment
vendors.
- Team Growth & Performance: Scaled the logistics department structure, establishing KPI frameworks and onboarding programs
that boosted overall team productivity and response speed.
- Crisis Management: Built agile operational protocols for high-load and emergency scenarios, successfully eliminating bottlenecks
during peak seasons without service disruption.
- Cost Optimization: Renegotiated key vendor contracts and implemented dynamic fleet allocation, driving down total operational
logistics costs by 30%.
- Assisted with daily road freight transport operations, dispatching, and communication.

Logistics Specialist Nov 2018 - Apr 2020
Artel Logistics
- Road Freight Operations: Assisted with daily road transport operations, freight dispatch, route tracking, and communication with
drivers and carriers.
- Operational & Team Support: Coordinated logistics workflows within the department, assisting senior specialists with documen-
tation, schedules, and fleet management.
- Escalation & Crisis Handling: Resolved operational issues and non-standard logistics situations, taking initiative to support the team
during high-load periods and off-hours.
- Client & Partner Communication: Maintained professional correspondence and day-to-day operational communication with clients
and transport partners adhering to corporate standards.
- High Initiative & Problem Solving: Proactively took ownership of complex operational issues within scope, ensuring smooth and
uninterrupted transport workflows.
- Process Support: Played a key role in improving the daily operations of the road transport department through efficient task
management and coordination.

EDUCATION

Bachelors degree in Sociology Sep 2017 - May 2021
State University of Information and Communication Technologies

SKILLS

Other: Python, SQL, Git, OpenAI API / LLM APIs, Docker, AI Agents, JSON / Data Processing, Figma, Jira, AWS, VS Code, Problem
Solving, Communication, Adaptability, Team Collaboration, Time Management, Supply Chain Management, Logistics Operations,
Vendor & Contract Management, Transportation Management Systems (TMS), Leadership, Project Management
Languages: English (intermediate), Ukrainian (intermediate), Russian (intermediate), Portuguese (intermediate)

CERTIFICATIONS

ChatGPT Prompt Engineering for Developers - OpenAI Jan 2026
Python for Everybody - Coursera Feb 2026

PROJECTS

Nuvis AI
Designed RAG-like workflows and prompt systems to generate high-quality, role-specific interview questions. Implemented evalu-
ation pipelines to improve response quality and reduce hallucinations. Delivered a full-stack AI product from concept to production,
integrating backend logic, APIs, and user-facing features. Optimized user interaction flows, increasing engagement and retention.
Tech: Python, Open AI API, Large Language Models (LLMs), Prompt Engineering, WebSockets, JSON processing, Prompt optimization, JavaScript /
TypeScript, HTML/CSS, React, Docker, Git