12.09.2025 aktualisiert

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40 % verfügbar

Software Engineer - Python expertise

Freiburg, Deutschland
Weltweit
Freiburg, Deutschland
Weltweit

Profilanlagen

Recommendation from former employer
CV - jonathan sundqvist.pdf

Skills

I'm a seasoned full-stack developer who specializes in building robust, high-performance web applications with Python at the core. With over a decade of experience, I've helped organizations from international startups to Fortune 500 companies like Fidelity Investments solve complex technical challenges and scale their applications.

Backend Development
  • Python Frameworks: Django (my specialty), FastAPI, Flask
  • Databases: PostgreSQL, optimization of complex queries
  • API Architecture: RESTful APIs, streaming data applications
  • Performance: Caching strategies, query optimization, bottleneck identification
Frontend Development
  • Modern Web Standards: Vanilla JavaScript, Web Components
  • Frameworks & Tools: Lit, Stimulus.js, HTMX, Vue.js
  • Philosophy: Modular, standards-compliant approaches over monolithic frameworks
DevOps & Quality
  • Code reviews, linting, automated testing
  • CI/CD pipeline setup and optimization
  • Monitoring with tools like Sentry and Splunk
Why Clients Choose Me
  • Mentorship Experience: I've successfully guided junior developers from zero Python knowledge to productive team members
  • Business Impact Focus: I identify and solve problems that directly impact your bottom line and user experience
  • Communication Excellence: Clear, frequent communication ensures projects stay on track and stakeholders stay informed
  • Open Source Contributor: Active in the community with public contributions and pull requests

 

Sprachen

EnglischMutterspracheJapanischverhandlungssicherSchwedischMuttersprache

Projekthistorie

Contractor - Python Engineer

Fidelity International

Banken und Finanzdienstleistungen

Hired to finish a migration from an old CMS to Django CMS. The
project was developed as a set of interdependent packages. I quickly
identified gaps in user experience as well as new bugs that needed to
be fixed for the migration to work properly.

A list of public Pull Requests is available during this period:
https://bit.ly/318QJcA

Software Engineer - Python Engineer

Zageno

Pharma und Medizintechnik

- Built punchout integrations, allowing customers to login and buy
products through their procurement application such as Oracle or SAP.
This required understanding of the cXML and OCI protocol.
- Built an upload tool handling 100 000 of uploaded entries every day.
Together with a matching algorithm that determines which of the
entries are to be updated and which are to be created.
- Produced the technical requirements and architecture for both of
these projects.
- Mentoring of a junior colleague. From no python knowledge to
contributing member in the tech team.
- Optimized database queries for django's ORM.

Software Engineer - Python Engineer

Server Density
Backend developer on the commercial side. Day to day I've been using
Python, PHP and Javascript in that order. Integrated and reverse
engineered 3rd party APIs for our usage.

Built features with asynchronous programming in Tornado. I also
worked on an internal customer system deployed on Google appengine.
One of the open source projects developed at Server Density is a
python wrapper for their api.

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