Daniel Lesner
Contact
Projects
Pulmo Rehab
Pulmo Rehab
Ruby on RailsEmber.jsPostgreSQL
Pulmo Rehab is a health platform where patients sync their smart watches/bracelets data for doctors to monitor and analyze. It enables real-time insights, helping healthcare providers track pulmonary health and offer personalized care.
Work
Full-stack Web Developer
Sightcall
04/2022 - 06/2024 (2 years and 2 months)
Boulogne-Billancourt, France
- Developed and tested new features to enhance the company's SaaS solutions.
- Worked in a Test-Driven Development (TDD) environment.
- Integrated third-party services like Sharepoint and Google Drive.
- Engaged in backporting and refactoring legacy code.
- Participated in an Agile setup with bi-weekly sprints.
Frontend:
Ember.jsReact.jsBootstrapXStateJest
Backend:
Ruby on RailsSidekiqRSpecJSONAPI-Resources
Databases:
MariaDBRedisElasticSearch
Others:
BashDockerJenkinsGitlab CI/CD
React Frontend Developer
MBN-TECH
10/2021 - 04/2022 (6 months)
Bucharest, Romania
- Developed a Next.js webapp for a multi-blockchain DeFi platform.
- Integrated web3.js to interact with Ethereum smart contracts.
- Researched DeFi concepts like token creation and staking.
Frontend:
TypeScriptReact.jsNext.jsMaterial-UI
Customer Excellence Support Analyst
VTEX
11/2020 - 08/2021 (9 months)
Bucharest, Romania
- Supported partners in building e-commerce sites on the VTEX platform.
- Addressed technical and business requirements for clients.
- Managed SEO optimization, debugging, and project management.
- Gained knowledge about the digital commerce industry.
Frontend:
HTMLCSSJavaScript
Junior Data Scientist
GfK
10/2018 - 11/2020 (2 years)
Bucharest, Romania
- Projects ranged from Test and Control studies (that measure advertisement effectiveness using geographic experiments) to more complex ones such as Marketing Mix Modelling studies (which help clients understand the impact of their advertising spend and forecast future marketing campaign performance).
- Developed and automated tasks using custom scripts.
- Followed and modified pre-made scripts.
- Gathered, cleaned, and analyzed large datasets.
- Wrote technical documentation and trained team members.
Programming:
RPythonSPSSVBABASHSQL
Tools:
GfK StarTrack
Education
MPhil Economics
University of Cambridge
09/2016 - 10/2017
Cambridge, England
- Specialised in microeconomics, macroeconomics and econometrics.
- Dissertation on “Inequality and its Effect on Economic Growth”.
BSc Economics
University of Essex
09/2011 - 06/2014
Colchester, England
- Graduated with a First Class award, included in “Dean’s List” due to exceptional results.
- Specialised in calculus, statistics and econometrics.
- Dissertation on “The Effects of Minimum Wages in Europe”.
General Certificate of Education
Costache Negruzzi National College
09/2003 - 07/2011
Iasi, Romania
- Passed the Romanian Baccalaureate with a top grade (8.6 out of 10).
- Scores: Mathematics (9.5), Physics (8.1), Romanian Literature (8.1).