Eerik Lehdonjoki
Senior Data Engineer
Jyväskylä, Finland
Profile
Senior data engineer with a software development background. I have built and run production systems, data integrations and cloud data platforms.
Currently I work mostly with Azure and Databricks. Daily tools are Python, SQL, Spark, Azure Data Factory, Terraform, Kubernetes and CI/CD.
Before data engineering I did backend and full stack development for many years, so I am also familiar with cloud infrastructure, application architecture and running things in production.
Core Expertise
Data Engineering
Databricks, Apache Spark, Azure Data Factory, Python, SQL, Lakehouse, Data Integrations
Cloud and Platform
Azure, AWS, GCP, Terraform, Kubernetes, Docker
Software Engineering
Java, Spring Boot, Python, TypeScript, PHP, Node.js, REST APIs
Delivery and Databases
Azure DevOps, GitHub, GitLab, CI/CD, PostgreSQL, MySQL
Professional Experience
Tietoevry
Senior Data Engineer
Dec 2023 to Present | Jyväskylä
- Building and running production data solutions with Azure Databricks, Azure Data Factory, Python, SQL and Spark.
- Data integrations and lakehouse based data processing.
- Software development, setting up production environments, deployments and operations.
- Infrastructure with Terraform and Kubernetes.
- Supporting software components with Java, Spring Boot, PostgreSQL, TypeScript and React.
- Build and deployment pipelines in Azure DevOps.
Key technologies: Databricks, Azure, Azure Data Factory, Apache Spark, Python, SQL, Terraform, Kubernetes, Java, Spring Boot, PostgreSQL, Docker, Azure DevOps
Cinia Oy
Senior Full Stack Developer
Apr 2023 to Sep 2023 | Jyväskylä
- Took part in development planning and architecture design for enterprise systems.
- Backend and frontend development with Java, Spring Boot, Python, TypeScript, React, SQL and PostgreSQL.
- Took part in production environment setup and deployments.
- Docker environments and CI/CD pipelines.
- Worked in both AWS and Azure.
Key technologies: Java, Spring Boot, Python, TypeScript, React, PostgreSQL, Docker, AWS, Azure, GitLab, CI/CD
On-Time Research Solutions Oy
Lead Developer
Jun 2021 to Apr 2023 | Jyväskylä / Helsinki
- Led the development team and took part in technical planning.
- Designed application architecture and integrations for enterprise customers.
- Backend and frontend development for customer systems.
- Used PHP, Laravel, TypeScript, React, Vue, PostgreSQL and MySQL.
- Docker based development and deployment environments.
- CI/CD pipelines and cloud environments in AWS and GCP.
Key technologies: PHP, Laravel, TypeScript, React, Vue, PostgreSQL, MySQL, Docker, AWS, GCP, GitHub
Full Stack Developer
May 2020 to Jun 2021 | Jyväskylä / Helsinki
- Frontend and backend development.
- Integrations to customer systems.
- PHP, Laravel, TypeScript, Vue, SQL, MySQL, Docker, AWS and GCP.
Taimer Oy
Full Stack Developer
Oct 2018 to May 2020 | Jyväskylä
- Frontend and backend development for business applications.
- Integrations to customer systems.
- PHP, Laravel, React, TypeScript, JavaScript, SQL and MySQL.
University of Jyväskylä
Programmer
Jan 2018 to Oct 2018 | Jyväskylä
- Software for healthcare related projects that used AI.
- Both backend and frontend work.
- Java, Spring Boot, JavaScript, Python, Node.js and Google Cloud Platform.
Technical Skills
Programming
Python, SQL, Java, TypeScript, JavaScript, PHP
Data Engineering
Databricks, Apache Spark, Azure Data Factory, Lakehouse, Data Integrations
Cloud
Azure, AWS, Google Cloud Platform
Infrastructure
Terraform, Kubernetes, Docker
Backend
Java, Spring Boot, Python, PHP, Laravel, Node.js, Express
Frontend
TypeScript, JavaScript, React, Vue
Databases
PostgreSQL, MySQL
Delivery
Azure DevOps, GitHub, GitLab, CI/CD Pipelines
Certifications
Microsoft Certified: Fabric Data Engineer Associate
Microsoft | Issued Aug 2026 | Expires Aug 2027
Databricks Certified Data Engineer Associate
Issued Dec 2025 | Expires Dec 2027
HashiCorp Certified: Terraform Associate (003)
Issued Jan 2025 | Expires Jan 2027
Microsoft Certified: Azure Fundamentals
Issued Jul 2024
Education
Master of Science, Information Technology
University of Jyväskylä | 2017 to 2020
Bachelor of Science, Information Technology
University of Jyväskylä | 2013 to 2017
Languages
Finnish: Native
English: Fluent, used daily at work