Senior FullStack Python & JS Developer -DEU
LocationDarmstadt, Germany
Typefull-time
SenioritySenior
Experience5+ yrs
Company size25+ people
PostedDec 5, 2025 · 10mo ago
Verified live16h ago
At a glanceSummarised by Seekless from the posting.
Advanced python developer; write efficient, well-understandable code
Good understanding of concurrent processing and scalable applications
Knowledge about common data exchange concepts, e.g. REST, MQTT
Experience in writing PyUnit tests and Integration tests; concept of mocking
Confident usage of SQL and noSQL databases (MariaDB, Redis)
(Debian) Linux CLI usage; Docker; Git version control system
Team-player spirit with strong self-learning abilities
Good communication skills, good English level spoken and written
Min. 5 years of professional experience in object oriented programming
Min. 4 years of professional experience with python
Skills
Python
Flask
Jinja
Bootstrap
REST
MQTT
MariaDB
Redis
Docker
Git
About the company
Cryoport Systems is the life science industry’s most trusted provider of supply chain solutions for temperature-sensitive materials, serving biopharmaceutical, IVF and surrogacy and animal health organizations around the world. Cryoport Systems’ proprietary Cryoport Express® shippers, Cryoportal® Logistics Management Platform, leading-edge Smartpak™ Condition Monitoring System and geo-sensing technology paired with unparalleled logistics expertise and 24/7/365 customer support, make Cryoport Systems the end-to-end temperature controlled supply chain partner that you can trust.
About the role
POSITION SUMMARY
You maintain and improve existing services for data processing, data persistence and data transport via APIs. To scale up our software environment, you review, refactor and extend existing implementations. Additional software components are to be conceptualized and implemented to optimize our operations processes.
A broad set of technologies is involved: Web frontends (Flask, Jinja, Bootstrap), API interaction with external systems (REST), Publish/Subscribe based messaging (MQTT), continuous and event-driven data processing, partially multi-threaded and/or concurrent and database operations.
Responsibilities
PRIMARY RESPONSIBILITIES (include but are not limited to)
· Understand and maintain existing services; troubleshooting and bugfixing
· Optimize implementations for higher performance and robustness
· Refactor codebase, extract cross-project dependencies to libraries
· Increase test coverage (Unit tests and integration tests)
· Interact with and embed external services, third-party libraries
· Develop, deploy and maintain services for internal processes
Requirements
COMPETENCIES & PERSONAL ATTRIBUTES
· Advanced python developer; write efficient, well-understandable code
· Good understanding of concurrent processing and scalable applications
· Knowledge about common data exchange concepts, e.g. REST, MQTT
· Experience in writing PyUnit tests and Integration tests; concept of mocking
· Confident usage of SQL and noSQL databases (MariaDB, Redis)
· (Debian) Linux CLI usage; Docker; Git version control system
· Team-player spirit with strong self-learning abilities
· Good communication skills, good English level spoken and written
QUALIFICATIONS AND EDUCATION REQUIREMENTS
· Min. 5 years of professional experience in object oriented programming
· Min. 4 years of professional experience with python