Junior Data Engineer
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Junior Data Engineer


We are looking for a Data Engineer with the ability to understand customer data, use it to provide insights into business processes and realities, and transform it into a form that is suitable for analysis using Data Science and Machine Learning approaches.

It is important that you show initiative, value details, and can communicate clearly with both technical-oriented people, and business users.

“You will be working on our main products NetMetrics and AssetMetrics – you will create ETLs to transform the customer data to the Transmetrics Data Model, create tests and test data in order to validate ETLs, and provide proper data sets for forecasting and optimization.

For the External Data project, you will support infrastructure design, periodical retrieval of external data and interface with internal data model.

For the Data Transformation productization, you will propose and implement components to optimize work on transformation of customer data.”


  • Work with customers to determine semantics of data
  • Identify and confirm data gaps 
  • Provide summary of customer data for basic analytics
  • Provide suggestions to support research team in forecast and optimization
  • Transform raw customer data into Transmetrics Input Format
  • Work with Transmetrics Warehouse to provide reports for the customers and inputs for forecasting and optimization modules
  • Suggest enhancements to the warehouse format if necessary
  • Suggest structure of additional database tables to supplement forecast and optimization processes
  • Identify and process external data sources to supplement customer data, forecasting and optimization


Technical skills:


  • SQL: DQL is essential, experience with DDL and DML is helpful. Experience with PostgreSQL preferred 
  • Information summary – able to provide graphs and aggregations in order to assess business-relevant insights from dataOptional
  • MS Excel: often supplementary data and reports are provided in .xls formats by the customer
  • Python: used for forecasting and optimization, as well as product scripts
  • Pentaho or another ETL tool is a plus
  • Git
  • Jira, or other bug-tracking software or ticketing system
  • Confluence, or other documentation software is helpful

Personal competencies:

  • Ability to write concise, clear and actionable emails and documentation
  • Interpersonal communication with the other team members and customers
  • Personal discipline with work and administration tasks
  • Proactiveness
  • Thoroughness and attention to detail

Progress path:

  • Becoming a (regular) Data Engineer requires the ability to write the specification of data transformations for a particular project by the Junior themselves, as well as the identification of data gaps and their prompt communication.
  • Becoming a Senior Data Engineer requires the ability to communicate independently about the data structure and semantics with the customers and the PM team, the identification of which data is critical for the project scope and goals, and the identification of potential issues and improvements, both for the specific customers, as well as the products themselves, as they pertain to the data needs and process.

Our tech stack

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Why Transmetrics is a great place to work

Work that Matters

You will be building a product that will dramatically optimize the cargo industry – this is our way of “changing the world for the better.”

Competitive Salaries

On top of them, you get 25 days paid annual vacation, flexible working hours, an opportunity to work from home when needed, additional health insurance and a convenient office location in the centre of Sofia.

Challenging Problems

Be challenged by technically complex problems in the fields of big data, predictive analytics and machine learning.

Awesome People

Learn from a strong international team of 35+people (majority with a very deep technical background) where you are appreciated and where your opinion matters.

Friendly Atmosphere

Have fun along the way in a dynamic, creative, and friendly atmosphere without the burden of the office politics.

Growing Quickly

Advance your skills and develop yourself in a rapidly growing startup, which is already generating solid revenue and has first-class customers.

Team Testimonials

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To apply, please fill in the form below. Please note that only short-listed candidates will be contacted for an interview (usually within 1 week).

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