David Lee

About

Originally from Scotland, I moved to Germany in 2010. Since 2018, I have dual nationality. I graduated with a PhD in Computing Science in 2010 building upon a BSc(Hons) in Computing for Business and E-Commerce from 2006. For over 10 years I have been working in the software industry particularly focusing on the exciting domain of e-commerce.

Software Developer & Architect & Product Owner

I have over 14 years experience in software development. During this time, I have also worked additionally as a software architect and product owner so that I can offer a wide range of soft skills around software development.

  • Age: 35
  • Website: www.davelee.de
  • Degree:PhD in Computing Science
  • City: Berlin, Germany

I would define software development as building great products for customers - therefore regular contact with stakeholders is essential. I believe in using the power of agile methods such as Scrum and Kanban to prioritise and deliver quickly minimum viable products for customers whilst maintaining the bigger picture through the product vision and product roadmaps. Through the use of clean architectures and codes we can build solutions that serve customers over many years.

Facts

Here are some interesting facts about me and my life as a software developer and on this Earth:

2

Nationalities - German & British

14

Years experience in software development

18

Repositories/Projects on GitHub

1,263

Kilometres - average distance travelled in one month

Skills

Software Development
I have extensive knowledge of Java focusing particularly on the development of RESTful Web Services and Microservices using the Spring Framework. Most of my applications I have built using Maven with the Git version control system. I have used FishEye for code reviews and Jenkins for building Continuous Integration pipelines. I also have some experience of using C#, Visual Basic and Perl. I use Visual Studio Code, Intellij IDEA and Eclipse as IDEs.

Web Development
I have extensive knowledge of building web sites for both commercial and non-profit organisation using primarily the LAMP Stack (Apache/MySQL/PHP). I also have knowledge in CSS and JavaScript and have used the NGINX web server as a proxy server.

Software Architecture & Project Management
I have experience planning, developing & maintaining monolithic, SOA (Service Orientated Architecture) & microservice architectures. I have experience of using both BPMN and UML as modelling tools. I have experience of using JIRA, YouTrack, Asana, Trello and Mantis for operative project management.


Continued Professional Development
I think it is important to extend and update my knowledge on a continual basis. I attend seminars and online courses to meet this goal. I recently completed the Digitalisation course at Masterplan.com and have completed the following training courses on the Udemy platform:


Further certificates of seminars and training conferences that I have attended can be provided on request.

Skill Matrix

Java 100%
Spring Framework (Spring Boot, Data etc.) 90%
CI/CD DevOps (Jenkins, Maven, ...) 95%
Web Development (HTML, PHP/MySQL, CSS) 95%
Project Management Tools (e.g. Jira, Asana) 100%
Cloud Computing (AWS)80%

Resume

Summary

David A J Lee

Experienced and passionate software developer, architect and product owner with +14 years of experience in software development from requirements through an initial concept and minimum viable products to a great product for the customer.

Education

Certified Professional Software Architect (Foundation Level)

2015

Hamburg, Germany

Topics included: foundations of software architectures, components/building blocks, interfaces, architectural goals, quality goals and tools.

Doctor of Philosophy in Computing

2006 - 2010

The Robert Gordon University, Aberdeen, Scotland

Thesis title: Hybrid Algorithms for Distributed Constraint Satisfaction. In my doctoral research, I investigated and developed hybrid algorithms for Distributed Constraint Satisfaction, combining the convergence abilities of local search with the completeness of backtracking. This has led to the development of new algorithms for Distributed Constraint Satisfaction including PenDHyb, Multi-Hyb and Multi-HDCS.

Bachelor of Science with 1st Class Honours in Computing for Business and E-Commerce

2002 - 2006

The Robert Gordon University, Aberdeen, Scotland

This degree combined a standard Computing Science degree with several business modules such as Marketing, Accounting and Change Management particularly focused on an E-Commerce context.

Professional Experience

Senior Product Manager

July 2020 - Present

myToys.de GmbH, Berlin, Germany

  • Responsible for search and product data systems.
  • Customer-centric product development and benchmarking.
  • Development of product backlog (business & technical).
  • Coaching other product managers and product owners.

Product Manager

February 2018 - June 2020

myToys.de GmbH, Berlin, Germany

  • Responsible for the development of Content Management System.
  • Development of product backlog & stakeholder management.

Software Architect

July 2014 - January 2018

myToys.de GmbH, Berlin, Germany

  • 40% software development of prototypes and techniques.
  • 30% technical leadership of projects
  • 30% future architecture (vision, technical roadmap, standards)

Software Developer

August 2010 - June 2014

myToys.de GmbH, Berlin, Germany

  • Backend-based Java developer to develop systems including:
  • Java-based Server/Client System with REST for Coupons (Database, Java Backend, Wicket Frontend, Maven, Spring-MVC, Hibernate, Tomcat) including migration of 30 million codes
  • Job Portal (Java, Maven, Spring-MVC, Hibernate, Oracle DB, Tomcat) for recruitment.

Extra-curricular activities

I have given a number of technical talks over the years. Two of these are available online:

  1. Developer’s Roadtrip to Heaven? myToys transition from SOA to Microservices Architecture
  2. On The Road to Continuous Delivery
I have also been part of the organising teams for the MICES conference since 2017.

Portfolio

I have developed a substantial amount of freely available open source software. The software range contains human resources management software, a transport simulator game, statistical software and some scripts for DevOps operations. This software is licenced under the GNU General Public Licence.

Research

Distributed Constraint Satisfaction

Constraint Satisfaction Problems are solved by algorithms assigning values (from a domain) to variables in the problem so that all constraints are satisfied. In Distributed Constraint Satisfaction Problems, variables are represented by agents who have only a partial understanding of the problem (their understanding is limited to the variables they represent and the constraints that those variables are involved in). Distributed problems are important when information cannot be shared either because there is too much information or because of privacy concerns. Existing algorithms for Distributed Constraint Satisfaction can be categorised as backtracking and local search algorithms. The former, whilst able to guarantee completeness, are often too slow for practical use whilst the later are often able to converge to a solution quicker but may not solve all problems (i.e. they are incomplete). In a summer scholarship in 2005 (supervised by Dr. Ines Arana & Dr. Hatem Ahriz), I compared the Distributed Breakout Algorithm with the Distributed Stochastic Algorithm on randomly-generated problems and scheduling problems. The tentative conclusions suggested that the Distributed Breakout Algorithm was more suited to randomly-generated problems whilst the Distributed Stochastic Algorithm performed better on scheduling problems. A prize was awarded for the research undertaken during this project. In addition to my research, I developed an experimental workbench written in Java to compare Distributed Constraint Satisfaction algorithms. In my doctoral research (supervised by Dr. Ines Arana, Dr. Hatem Ahriz & Dr. Kit-Ying Hui), I investigated and developed hybrid algorithms for Distributed Constraint Satisfaction, combining the convergence abilities of local search with the completeness of backtracking. This has led to the development of new algorithms for Distributed Constraint Satisfaction including PenDHyb, Multi-Hyb and Multi-HDCS. I also continued to develop the experimental workbench (SEICOSSA – A Smart Experimental Interface for Constraints) which I started to develop during my initial scholarship.



Information Retrieval & Relevance Profiling

Before starting my doctoral projects, I was involved in the Information Retrieval research field. Together with Professor David J. Harper I sought answers to the question how effective is relevance profiling in retrieving relevant pages of a book as defined by the book’s own index? This project sought to measure this effectiveness through an investigation of a number of weighting functions on the within-document retrieval tool, ProfileSkim. Conclusions from the project were presented at the Ninth Australasian Document Computing Symposium.

Publications


Multi-HDCS: Solving DisCSPs With Complex Local Problems Cooperatively.

LEE, D. and ARANA, I. and AHRIZ, H. and HUI, K. 2010. Multi-HDCS: Solving DisCSPs With Complex Local Problems Cooperatively. In: Proceedings of 2010 IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT 2010). 1st-3rd September 2010. Toronto: Canada. pp. 295-302.

Multi-Hyb: A Hybrid Algorithm for Solving DisCSPs with Complex Local Problems.

LEE, D. and ARANA, I. and AHRIZ, H. and HUI, K. 2009. Multi-Hyb: A Hybrid Algorithm for Solving DisCSPs with Complex Local Problems. In: Proceedings of 2009 IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT 2009). 15th-18th September 2009. Milan: Italy. pp. 379-382.

A Hybrid Approach to Solving Coarse-grained DisCSPs.

LEE, D. and ARANA, I. and AHRIZ, H. and HUI, K. 2009. A Hybrid Approach to Solving Coarse-grained DisCSPs. In: Proceedings of the Eighth International Conference on Autonomous Agents and Multi-Agent Systems (AAMAS 2009). 10th-15th May 2009. Budapest, Hungary. pp. 1235-1236.

A Hybrid Approach to Distributed Constraint Satisfaction

In: D. DOCHEV, M. PISTORE and P. TRAVERSO, ed. Artificial Intelligence: Methodology, Systems and Applications. 13th International Conference, AIMSA 2008 Varna, Bulgaria, September 4-6 2008 Proceedings. 4th-6th September 2008. Varna: Bulgaria. pp. 375-379.

On the Effectiveness of Relevance Profiling

HARPER, D. J. and LEE, D. 2004. On the Effectiveness of Relevance Profiling. In: P. BRUZA, A. MOFFAT and A. TURPIN, ed. Proceedings of the Ninth Australasian Document Computing Symposium. 13th December 2004. Melbourne: Australia. pp. 10-16.

Contact

You are very welcome to contact me about my profile or how my experience could help you in the future.