Cristian Dan

Executive Co-Founder & CTO | Engineering Leader
London, UK.

About

Highly accomplished Executive Co-Founder and CTO with over a decade of experience leading technological innovation and scaling high-growth startups. Proven expertise in building robust, high-performing applications and backend infrastructures from conception, driving user acquisition to over 10,000 within months, and achieving significant cost reductions. A strategic technical leader adept at building and mentoring high-performing engineering teams, managing complex projects, and driving product development from vision to market.

Work

Yayzy
|

Co-Founder and CTO

Summary

Led the end-to-end technology vision and execution for a FinTech startup, overseeing product development, infrastructure scaling, and team growth to support global operations and significant user acquisition.

Highlights

Spearheaded the end-to-end development of a FinTech application (React Native, Node.js, AWS) from scratch, acquiring over 10,000 users within the initial three months and achieving recognition as a featured app on the Apple App Store.

Architected and implemented a microservices architecture with auto-scaling infrastructure, dramatically increasing workload capacity by an order of magnitude while reducing infrastructure costs by 60%.

Grew the engineering and design team from 2 to 9 professionals, leading full-cycle recruitment, hiring, and mentorship processes to accelerate product development and support business expansion.

Directed a 7-member cross-functional technical team, successfully scaling the platform to support operations across 30+ countries and integrate with 2,500 diverse banking institutions.

Enhanced system security, scalability, and operational efficiency by implementing robust automated deployment tools and a comprehensive testing pipeline.

Developed and trained a Machine Learning model for automated processing and labeling of transaction data, improving accuracy in identifying industries, sub-industries, and merchants.

Formulated and executed a strategic technology roadmap, defining short, medium, and long-term goals for infrastructure and business alignment.

Boosted user engagement and retention rates through real-time analytics and continuous optimization of the onboarding flow, enhancing user experience.

Elektrik Network
|

Engineering Manager

Summary

Managed engineering operations, facilitating team transitions, ensuring knowledge transfer, and contributing to codebase improvements for ongoing development and support.

Highlights

Directed the seamless offboarding of an external development partner, securing complete handover of intellectual property, source code, and comprehensive project documentation.

Built and onboarded a new in-house development team, successfully transitioning ownership of ongoing development and support from external partners.

Orchestrated critical knowledge transfer initiatives and established best-practice workflows and documentation standards, significantly reducing post-transition knowledge gaps.

Contributed directly to the codebase, performing critical fixes and refactoring legacy code that enhanced maintainability and system performance.

Stint
|

Chief Technology Officer

Summary

As an early team member and CTO, spearheaded technology strategy, product development, and team building for a high-growth startup connecting employers with on-demand university student workforce.

Highlights

As an early team member, played a pivotal role in a tech startup connecting employers with on-demand university student workforce, contributing to user base growth to over 4,000 students by 2019.

Spearheaded the company's technology strategy and vision, implementing secure and resource-efficient technologies to drive platform development and growth.

Directed the end-to-end development and successful release of the Minimum Viable Product (MVP) within 4 months, ensuring a stable infrastructure and continuous platform functionality.

Increased job postings from 10/week to over 150/week by optimizing platform performance, implementing improved features, and enhancing UI/UX under my technical leadership.

Built and led a high-performing 6-member development team, optimizing workflows, advising on platform security, and mentoring junior engineers in React, Node, Python, and Jupyter.

Collaborated cross-functionally with UX, design, and executive teams to define optimal technical solutions, ensuring successful scoping, planning, and implementation of new features.

Oversaw daily technical operations, conducting code reviews, resolving blockers, and facilitating team meetings while contributing hands-on to key projects.

Enhanced cross-functional knowledge sharing across the organization by implementing collaborative tools like Trello and Google Drive/Docs.

Zebra Fuel Ltd
|

Senior Software Engineer

Summary

Developed and architected critical frontend and backend systems, contributing to product development and team growth for a mobile fuel delivery service.

Highlights

Developed a suite of JavaScript projects, including a React Web + Cordova hybrid mobile app for customers, Node.js microservices on AWS Lambda, and a React web portal for business fleet orders.

Implemented cutting-edge frontend technologies including GraphQL, React v16 with error boundaries, Semantic UI for rapid prototyping, and an external configuration loader.

Architected and delivered a Dashboard project using GraphQL and Relay, enhancing clarity and accessibility of resources for frontend clients.

Contributed significantly to business logic and product development, while actively participating in interviewing and recruiting new frontend team members.

Mentored team members on GraphQL, enabling successful adoption and integration of this technology into new projects.

TRISOFT Group
|

Contract Software Engineer

Summary

Delivered high-quality software products as a contract engineer, leveraging diverse frontend technologies and ensuring timely project completion.

Highlights

Collaborated remotely to deliver 5 high-quality products across various projects using Vue, Angular, and React technologies.

Achieved proficiency in Vue.js within one week, enabling prompt coding contributions that accelerated project delivery schedules.

Enhanced the 'Literally Canvas' library (React-based) to function as a t-shirt designer, enabling the client to launch an MVP in under 80 work hours.

Ensured successful, on-schedule delivery of the 'Ready Player One Movie's page' project by providing continuous support and applying comprehensive technical expertise.

iQuest Group
|

Software Engineer

Summary

Contributed to software development within a large solutions provider, focusing on technology research and advocating for efficiency improvements.

Highlights

Collaborated effectively within a 10-member team in a leading software solutions department of 25.

Researched and championed the adoption of cutting-edge technologies like Qlik, React, and JavaScript, accelerating team project delivery time by 20%.

City365
|

Technical Co-founder

Summary

Co-founded a tech venture, leading the design, development, and scaling of a hybrid mobile application with a robust backend on Azure.

Highlights

Designed and developed a hybrid mobile application (Ionic, Angular.js) with a Node.js backend on Azure, achieving seamless scalability of tens of thousands of requests per second within 3 months.

Managed the end-to-end development lifecycle from launch to app store submission, including training developers on new technologies and processes.

Led a 3-member development team in building the backend, admin panel, and mobile application, fostering expertise in Node.js, REST, Angular.js, and DevOps methodologies.

Education

Babeș-Bolyai University

Master's Degree

Distributed Computing and Systems in Internet

Babeș-Bolyai University

Bachelor's Degree

Computer Science

Languages

English
French
Romanian

Skills

Programming Languages

JavaScript, Python, Java, C#, C++, C, x86 Assembly.

Frameworks & Libraries

React.js, Node.js, Vue.js, AngularJS, Ionic Framework, ASP.NET MVC, GraphQL, React Native, HTML, CSS, HTML5.

Cloud & Infrastructure

AWS, Azure, Hadoop, Microservices, Auto-scaling Infrastructure.

Databases

SQL.

Methodologies & Practices

Software Engineering, OOP, Scrum, Programming, Software Development Lifecycle, Test Driven Development, DevOps.

System & Product Management

System Architecture, Product Development, Product Management, Project Management, Mobile Programming.

Leadership & Strategy

Technical Leadership, Engineering Management, Entrepreneurship, Leadership, Planning, Strategy, Coaching, Servant Leadership, Prioritization, Influence.

Machine Learning

ML Model Training.

Awards