Fabian Linzberger
Verified Expert in Engineering
Software Developer
Stockholm, Sweden
Toptal member since January 31, 2018
Fabian would characterize himself as a data science and deep learning enthusiast, a functional programmer, and a full-stack engineer with DevOps experience. He has over a decade of experience working within the industry using a variety of languages (Erlang, Haskell, Python, JavaScript, Scala, Clojure, Ruby, and more) and who enjoys working in environments that are open to creativity and values working solutions to problems above all.
Portfolio
Experience
- Python - 10 years
- Erlang - 7 years
- Haskell - 7 years
- Functional Programming - 7 years
- Scikit-learn - 5 years
- JavaScript - 5 years
- Scala - 1 year
- Keras - 1 year
Work Experience
Machine Learning Engineer
Schibsted
- Trained and deployed ad content classification and clustering models.
CTO
Sellpy
- Implemented an online marketplace site from scratch for Sellpy.se/market; using React, Redux, and Immutable.js with a Node.js back-end.
- Designed and implemented a machine learning model for the likelihood of selling secondhand goods.
- Set up continuous deployment and a review and the prioritization process for the engineering team.
- Migrated from a Parse platform as a service to Node.js on Heroku and other cloud services.
- Developed and designed a recommendation system for recurring users of an online marketplace.
Senior Software Engineer
TrueAccord
- Developed and maintained an online debt collection platform in Scala and JavaScript.
- Implemented per state time of the week and time-of-day compliance logic for calls and texting.
- Set up metric monitoring and an alerting integration with Datadog.
- Developed analytics for A/B testing of customer collection messages.
- Implemented a limited rate integration for sending texts through Twilio.
Senior Software Engineer
Campanja
- Developed and maintained the real-time tracking website/conversion tracking product in Erlang (with peaks of 3,000 requests per second).
- Designed and implemented a batch analytics platform based on Cascalog and Amazon EMR.
- Led a team of six engineers.
Software Developer
Klarna
- Rewrote and rearchitected the payment processing API.
- Troubleshot the production system and database.
- Designed and implemented an automated Linux configuration management system based on Opscode Chef.
- Coached the engineering teams in how to use Git during the migration from Subversion.
Systems Engineer
Mayr-Melnhof Karton GmbH
- Introduced configuration management using Puppet for about 200 Linux servers and routers.
- Took part in a large voice over IP rollout.
- Designed and implemented Kerberos and an LDAP infrastructure for Linux with an active directory integration.
Skills
Libraries/APIs
React, Node.js, Scikit-learn, TensorFlow, Keras, Pandas, PyTorch, Mandrill API, SendGrid API, Twilio API, XGBoost, PostgREST
Tools
Git, Emacs, Chef, Puppet, VMware, SWIG, Ansible, RabbitMQ, Amazon Elastic MapReduce (EMR), AWS ELB
Languages
JavaScript, Erlang, Python, Haskell, Ruby, PureScript, Clojure, R, Scala
Frameworks
Redux, Django, Express.js, Play
Paradigms
Functional Programming
Platforms
Docker, Debian, Heroku, Algolia
Storage
Datadog, CouchDB, Riak, Google Cloud Datastore, Google Cloud Storage, Amazon S3 (AWS S3), MongoDB, PostgreSQL, MySQL
Other
Machine Learning, Artificial Intelligence (AI), Deep Learning, Computer Vision, Natural Language Processing (NLP), Bayesian Statistics, Amazon Kinesis, Generative Pre-trained Transformers (GPT)
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