Position: Python Backend Developer
Company: Source Angel
Experience required: 3y
English level: upper

CO2HERO is fast becoming the world's leading app to take climate action. 

We connect businesses committed to a positive impact for the planet with a global community committed to making eco-friendly choices. In particular, we guide our users to cut down on their CO2 emissions through different lifestyle activities such as commuting, recycling, reusing, food .... just to name a few. 

**CO2HERO** is a (SaaS) scale-up. Our clients are Fortune 500 companies. We have a  global vision and exist to encourage change in everyday behaviour, in a balanced way. 

As one of our customers said “**CO2HERO** is a one-stop platform for carbon-friendly actions that combines gameplay, competition, and climate science no matter where people may be in the world”. 

With roots in Scandinavia, we continue to build momentum towards a better tomorrow - for all of us. 

Based in Copenhagen, you will report directly to, and work closely with our Chief Technology Officer to bring to life our **CO2HERO** Development Strategy. 

Join our team, already with 8 different nationalities where the company language is in English. We are working closely together across borders to improve our daily lives.  

**Responsibilities** 

● Backend development in Python, GraphQL/REST API’s and PostgreSQL 
● Interaction with other members of the project team 
● Estimation management, code review 
● Extending our proprietary framework (We are not using Django) 
● Analyzing and troubleshoot complex problems in a timely and accurate manner 
● Actively looking for security vulnerabilities in the code, in code reviews and in the project design 


**Required skills**

● 3+ experience with Python and SQL using psycopg2 
● Experience with advanced queries in SQL without using ORM 
● Experience with PostgreSQL 
● Experience with Panda & Numpy 
● Solid knowledge of object-oriented programming and experience in a low level programming language 
● Experience with implementing based on security by design 
● Experience with performance tuning and improvements 
● Experience with caching 
● Write clean and well-documented code 
● Analytical thinking 
● Experience with UnitTesting based on testing logic and not just code coverage 
 

**Plus** 

● Understanding and experience with GraphQL 
● Experience with NoSQL databases 
● Experience with Git / GitHub 
● Experience with Microservice architecture and messaging 

 
**As part of our team, you’ll enjoy** 

● Ability to work directly with a Lead developer from Denmark who has wide experience working with global dev teams 
● Working in a team of smart, creative people 
● Flexible working hours 
● Paid vacation 
● Paid sick-leaves 
● Corporate events 
● Nice office in Bucharest 
● Coffee and cookies in the kitchen, parties, lunches, etc.