DENNIS MARJANOV
London
Summary
Computer Science graduate (First-Class Honours, 2025) with experience in full-stack development, Agile workflows, and human-computer interaction as well as extensive travel, leadership and dependence developed through International tennis competition.
Overview
4
4
years of professional experience
3
3
years of post-secondary education
Work history
Software Engineer
Foxtons
London
12.2025 - Current
- Delivered bug fixes within structured sprint cycles, ensuring issues were resolved, tested, and released on schedule.
- Modified and optimised SQL stored procedures that were returning incorrect results, including resolving duplicate row issues and faulty aggregations.
- Reverse-engineered application behaviour by analysing existing code and data flows to resolve business-driven issues raised by stakeholders.
Support Software Engineer (.NET, C#, SQL, Jira)
Foxtons
London
01.2025 - 12.2025
- Identified and explored bugs in Foxtons' bespoke BOS CRM (17B+ records) using advanced SQL queries and codebase analysis.
- Collaborated with engineers to analyse stack errors, identify root causes, and propose long-term system fixes.
- Developed a strong ability to read and understand complex, large-scale proprietary code, gaining deep insight into a unique CRM architecture.
- Reduced Jira ticket backlog from 38 to 10, a 74% improvement within three weeks, demonstrating rapid adaptability and problem-solving.
Professional Tennis Coach and Hitter
International Tennis Federation
01.2022 - 12.2025
- Coached individuals and groups of 16, diverse ages and abilities, demonstrating strong leadership, communication, and adaptability.
- Developed transferable skills in strategic thinking, communication, and leadership, relevant to tech roles involving problem-solving and team collaboration.
Full Stack Developer (React, Java, JavaScript, SQL, Trello, Git)
Spendy
London
01.2025 - 06.2025
- Designed and implemented an algorithm to generate a dynamic spending score, analysing past habits, current subscriptions, and predicted future financial behaviour.
- Worked as a Full Stack Developer, applying Agile methodology to plan, develop, test, and iterate throughout the software lifecycle.
- Collaborated via Git for version control, code reviews, and integration.
Education
Bachelor of Science - Computer Science Software Engineering
Royal Holloway University of London
London 09.2022 - 09.2025
TENNIS
- Competed internationally, reaching qualification stages of professional tournaments and developing resilience under elite pressure.
- Took Wimbledon Doubles Champion Julian Cash to a set tiebreak in the NPL, showing focus and performance at a world-class level.
- Held a Tecnifibre sponsorship for 6 years, proving consistency, professionalism, and long-term dedication.
- Balanced 20+ hours of weekly training with a First-Class Computer Science degree, demonstrating discipline and time management.
PROJECT
Reseller Tracker (React, JavaScript, SQL, Supabase, Git),
- Built a multi-user SaaS platform using the MVC architecture, where each user manages their own inventory through a secure, token-based authentication system.
- Designed and implemented algorithms to track inventory, fees, ROI, and turnover time, with automated calculations for profitability and decision-making.
3D Travel Planner (Svelte, TypeScript, HTML, CSS, JSON),
- Presented analytical data through intuitive methods for users.
- Applied progressive disclosure to reduce cognitive load, improving retention by 20-30%.
- Integrated an AI itinerary planner, generating step-by-step routes via APIs.
Timeline
Software Engineer
Foxtons
12.2025 - Current
Full Stack Developer (React, Java, JavaScript, SQL, Trello, Git)
Spendy
01.2025 - 06.2025
Support Software Engineer (.NET, C#, SQL, Jira)
Foxtons
01.2025 - 12.2025
Bachelor of Science - Computer Science Software Engineering
Royal Holloway University of London
09.2022 - 09.2025
Professional Tennis Coach and Hitter
International Tennis Federation
01.2022 - 12.2025