Joose Rajamäki

The work is on coordinating large projects in the logistics domain, documenting, overseeing and also doing direct contributions. The role also involves being active in recruitment activities, especially developing and conducting technical interviews.

Engineering Team Lead, Wolt / Doordash, November 2024 - March 2025

I was responsible for running the Logistics Assignments team. The team is responsible for developing and maintaining the assignment engine at Wolt. The assignment engine plans the routes and matches the tasks to the courier partners. This is a critical part of the company's software and it needs to run day and night and operate under heavy loads at all times.

Senior Applied Scientist, Wolt / Doordash, September 2020 - October 2024

My work revolved around developing the routing algorithm of the company and also making the logistics processes more efficient in general. Some specific tasks that I worked on include:

Developing the in-house route optimizer (C++ programming)
Operations research
Exploratory data science
Developing and deploying machine learning models
Traffic modeling
Simulations
Developing switchback testing capabilities and conducting switchback tests
Building CI/CD pipelines in GHA
Doing any and all sorts of tasks related to the logistics domain both engineering and data science

Data Scientist, Vincit, August 2018 - September 2020

I did data science projects in various domains for multiple customers. The projects ranged from time series prediction to natural language processing and optimization of industrial processes.

PhD Student, Aalto University, October 2014 - September 2018

My research concerned random search (Monte Carlo) methods for optimal control. The research also included machine learning.

Research Scientist, VTT Technical Research Centre of Finland

Scientist, July 2014 - October 2014
Research trainee, June 2013 - June 2014
Research trainee, May 2012 - December 2012

I worked in the Antennas and radio frequency technology team at VTT Technical Research Centre of Finland. The work involved radio frequency hardware projects. The technologies that I worked with ranged from antennas and simple passive devices to radio frequency micro electro-mechanical components.

Course Assistant, Aalto University

Spring 2012
Fall 2011
Spring 2010
Fall 2009

I was an assistant at the course "Applied Probability and Statistics" in Aalto University. The course included the fundamentals of probability and statistics.

Early Work Experience

Project engineer trainee, SRV, Summers 2009 and 2010
Construction worker, Hartela, Summers 2006 and 2008
Hamburger assembler, McDonald's, Summer 2007
Janitor, DB Schenker, Summer 2004

Education

Doctor of Science, Aalto University, 2018

I earned my doctorate from Aalto University in 2018. My research concerned random search methods for optimal control. The research also involved machine learning methods.

Master of Science with distinction, Aalto University, 2014

I earned my Master of Science degree in electrical engineering from Aalto University in 2014. I majored in signal processing and did a minor in computational science, i.e. my studies consisted mostly of programming mathematics heavy algorithms. The elective studies contained also radio engineering, and my master's thesis was about designing integrated radio frequency electronics.

Bachelor of Science with honours, Aalto University, 2013

I earned my Bachelors degree in electrical engineering from Aalto University in 2013. My major was electronics and I minored in mathematics. My bachelor's thesis was in the field of radio frequency electronics and it handled the possibilities of implementing tunable filter technologies.

Military Service

Military service is obligatory to all male citizens of Finland. I completed my military service in July 2010 - July 2011 earning the rank of Second Lieutenant. I completed the reserve officer training in the Reconnaissance Company. I have attended to mandatory military drills and in June 2019 I was promoted to the rank of Lieutenant.