Kristiyan Cholakov

Data Engineer

Sofia, Sofia City, Bulgaria1 yr 10 mos experience
AI EnabledAI ML Practitioner

Key Highlights

  • Expert in Machine Learning and Data Science.
  • Proven track record in AI-driven projects.
  • Strong foundation in full-stack development.
Stackforce AI infers this person is a Data Science and AI specialist with full-stack development capabilities.

Contact

Skills

Core Skills

Data ScienceData ModelingMachine LearningFull-stack DevelopmentArtificial Intelligence (ai)Project ManagementTeachingCommunicationTechnical SupportCustomer ServiceNetwork Administration

Other Skills

Data AnalysisExtractionTransformation And Loading (ETL)React.jsTeamworkMongoDBMicrosoft AzureSoftware DocumentationLarge Language Models (LLM)OAuthGitNext.jsTailwind CSSCode ReviewOptical Character Recognition (OCR)

About

As a recent graduate in Computer Science from Nanyang Technological University (NTU), Singapore, with a specialization in Artificial Intelligence and Data Science, I am passionate about leveraging cutting-edge technologies to solve complex problems. My academic journey was enriched by a minor in Mathematics and a range of impactful projects that honed my technical expertise and analytical skills. Over the years, I have cultivated a deep interest in Machine Learning and Data Science, focusing my studies and practical efforts on these fields. Through rigorous coursework, research, and hands-on projects, I have built a solid foundation in AI and DS, complemented by a drive to explore new models, methodologies, and their applications. Beyond my technical pursuits, I am dedicated to teamwork, leadership, and innovation. I thrive in collaborative environments, identifying critical components of projects, efficiently delegating tasks, and integrating diverse technologies to deliver innovative solutions. I am currently applying these skills in my role as a Senior Data Modeller at Experian, where I work on developing and optimising data models that power analytics, decision-making, and business insights. This opportunity allows me to combine my academic background with real-world, high-impact projects in a global organisation. If you’re looking for a motivated and forward-thinking individual to contribute to your team or explore collaboration opportunities, I’d love to connect. Let’s make an impact in the ever-evolving tech and data landscape.

Experience

1 yr 10 mos
Total Experience
1 yr
Average Tenure
9 mos
Current Experience

Experian

Senior Data Modeller

Aug 2025Present · 9 mos · Sofia, Sofia City, Bulgaria · Hybrid

Data ModelingData AnalysisData ScienceExtractionTransformation And Loading (ETL)

Tüv süd

Data Engineer

Jul 2023Dec 2023 · 5 mos · Singapore · On-site

  • During my internship at TÜV SÜD, I played an integral role in several high-impact projects, contributing significantly to TÜV SÜD's AI department:
  • AI Quality Standards Analysis: Studied and reviewed unreleased ISO AI quality standards, creating comprehensive slide presentations for internal future training. This work deepened my understanding of AI compliance.
  • AI Readiness Analysis Web Application Development: Played a significant role in developing, testing, and bug fixing for TÜV SÜD’s AI Readiness Analysis web application. Designed a new user interface, enhancing usability and user experience. This project was significant as one of the main products from TÜV SÜD's AI department.
  • Automated AI Readiness Evaluation with Generative AI: Worked on a project to enhance the AI Readiness application by generating custom questions for evaluating clients' AI systems. This involved hosting and fine-tuning Meta's Llama 2 to generate industry-specific questions, demonstrating my capability in handling advanced AI technologies.
  • Project Management and Collaboration: Used Microsoft Azure DevOps for project management, collaborating with team members to ensure timely task completion. Gained experience in creating work items, managing timelines, and writing user stories and manuals.
  • Full-stack Development: Engaged in front-end and back-end development using React.js and Node.js. Implemented server-side rendering with Next.js and worked with OAuth server to secure the authentication of the AI Readiness Analysis application.
  • Organizational Culture and Business Insight: Experienced TÜV SÜD’s structured organizational culture, engaging in semi-formal communication and collaborative work environments, fostering a professional atmosphere.
  • This internship enhanced my technical skills and prepared me for future challenges in data engineering and AI development. The professional working environment significantly contributed to my career development.
CommunicationReact.jsMachine LearningArtificial Intelligence (AI)Data ScienceTeamwork+12

Nanyang technological university singapore

Researcher

Sep 2022Jun 2023 · 9 mos · Singapore · On-site

  • As part of the NTU URECA undergraduate research program, I contributed to advancing Handwritten Mathematical Expression Recognition (HMER) through a complexity-driven model combination approach. My role involved analyzing state-of-the-art HMER models, developing a novel classification mechanism, and optimizing deep learning architectures for multi-GPU processing, significantly improving recognition accuracy and speed.
  • Key Contributions & Achievements:
  • State-of-the-Art Research: Conducted an in-depth study on HMER models, exploring their limitations and designing strategies to enhance recognition performance.
  • Complexity-Based Model Combination: Developed an approach to classify expressions into simple, complex, and composite categories, applying the most effective pre-trained model dynamically.
  • Symbol Detection with YOLO: Integrated YOLO for real-time mathematical symbol detection, refining expression classification and segmentation.
  • Multi-GPU Acceleration: Implemented multi-GPU processing, boosting efficiency and enabling faster recognition of large, complex mathematical expressions.
  • Performance Gains: Achieved a 65.21% expression recognition rate on the CROHME 2019 test dataset, surpassing traditional models in both accuracy and processing speed.
  • Real-World Impact: Research findings have applications in education, digital document processing, and AI-driven handwritten text recognition.
  • This experience strengthened my machine learning expertise, deep learning optimization skills, and ability to conduct high-impact research, aligning with my passion for AI-driven solutions and scalable architectures.
Machine LearningOptical Character Recognition (OCR)Data Science

Freelance

Private Math Tutor

Jun 2020Jul 2021 · 1 yr 1 mo · Bulgaria · Hybrid

  • During my high school years, I provided private math tutoring to younger students, helping them gain a deeper understanding of mathematical concepts and preparing them for their exams. I tailored each lesson to meet the individual needs of my students, ensuring they fully grasped the material and felt confident in their abilities.
  • As a result, many of my students achieved A grades on their exams, and I successfully prepared several students for high school entrance exams. Thanks to our focused work together, they not only secured spots in their desired schools but also significantly improved their overall math results.
CommunicationCollaborationTeachingProblem SolvingAdaptability

Cnsys plc

Computer Maintenance Assistant

Jun 2019Aug 2019 · 2 mos · Sofia, Sofia City, Bulgaria · On-site

  • During my internship at CNsys PLC, I served as a Computer Maintenance Assistant, where I played a key role in supporting the company's technical operations. My responsibilities included:
  • Hardware Repair and Maintenance: Assisted in diagnosing and repairing computer components, ensuring that all devices were functioning optimally and addressing any hardware issues promptly.
  • Custom Server Builds: Collaborated with senior technicians in building custom servers tailored to the specific needs of clients, enhancing my understanding of server architecture and configuration.
  • Client Interaction and Support: Worked directly with clients at the front office, providing technical support and addressing their concerns, which improved my customer service and communication skills.
  • Business Meetings: Attended business meetings with corporate clients, gaining insights into client requirements and contributing to discussions on technical solutions and service offerings.
  • Technical Documentation: Assisted in the preparation of technical documentation and reports, ensuring clear and accurate records of maintenance activities and client interactions.
  • Inventory Management: Helped manage the inventory of computer components and spare parts, ensuring that the necessary supplies were available for maintenance and repair tasks.
  • System Upgrades: Participated in system upgrades and software installations, keeping client systems updated with the latest technologies and security patches.
  • This internship provided me with valuable experience in computer maintenance, customer support, and technical operations, preparing me for a career in IT and technical services.
CommunicationTechnical DocumentationCustomer ServiceInventory ManagementCustomer SupportComputer Hardware Troubleshooting+1

Serta-group

Network Administrator

Jun 2018Sep 2018 · 3 mos · Kardžali, Kurdzhali, Bulgaria · On-site

  • As a Network Administrator Intern at Serta-Group, I had the opportunity to work closely with the lead network architect. My responsibilities included:
  • Network Maintenance and Troubleshooting: Ensured the integrity and functionality of the company's local network through regular maintenance and troubleshooting. Conducted weekly backups of all company computers to isolated servers, ensuring data safety and continuity.
  • Malware Incident Management: Successfully mitigated a malware outbreak within the office network. Leveraged the existing backup system to reinstall affected computers and restore data, minimizing downtime and data loss.
  • Hardware Installations and Repairs: Conducted hardware installations and repairs across the network infrastructure of both factory and administrative buildings. This included setting up new devices and ensuring seamless integration into the existing network.
  • Resource Management: Managed and optimised sharable resources between local networks, ensuring efficient and secure access for all users.
  • Technical Support: Provided technical support, resolving issues related to computer hardware and network connectivity. This role honed my skills in both network and hardware troubleshooting.
  • Custom Financial Analysis Tools: Developed custom Excel files for analysing and documenting financial documents, aiding in the efficient processing and reporting of financial data.
  • Web Development: In my spare time, I created a static website for the company’s Bulgarian branch, enhancing my skills in PHP, JavaScript, HTML, and CSS.
  • Throughout this internship, I gained hands-on experience in network administration, technical support, and web development, contributing to the smooth operation of Serta-Group's IT infrastructure.
Cascading Style Sheets (CSS)Network AdministrationTechnical SupportPHPComputer Hardware TroubleshootingHTML+1

Education

Nanyang Technological University Singapore

Bachelor of Engineering - BE — Computer Science

Aug 2021Jan 2025

Software University (SoftUni)

Python Web Developer

Oct 2018May 2020

First Private Mathematical High School

High School Diploma — Mathematics and Computer Science

Sep 2016May 2021

Stackforce found 100+ more professionals with Data Science & Data Modeling

Explore similar profiles based on matching skills and experience