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Fredrik Håård, Python Developer in Stockholm, Sweden
Fredrik Håård

Python Developer in Stockholm, Sweden

Member since May 22, 2014
Fredrik is a developer with over ten years of contracting and entrepreneurial experience. He specializes in back-end product development and lifecycle maintenance in everything from cluster implementations in Telcom charging systems to full-stack product development for one-person startups.
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Portfolio

  • Visual Units
    Java ME, Python, C, MySQL, MongoDB, Memcached, Django, Linux, Debian, Celery
  • BCG GAMMA
    Python, AWS, EMR, Airflow, Boto3, PySpark, Spark, S3
  • Piney Bowes
    Groovy, Jenkins Pipelines, Python, Terraform, Airflow, AWS EC2, AWS ECS...

Experience

Location

Stockholm, Sweden

Availability

Part-time

Preferred Environment

Debian Linux/Fluxbox, Emacs, Hg/Git, FishShell

The most amazing...

...thing I've created is a full fleet management system, doing everything from writing the first embedded code for terminals to scaling the databases years later.

Employment

  • CTO

    2004 - PRESENT
    Visual Units
    • Created a full-fledged fleet management system from the ground up.
    • Took the product through (so far) three successful major database migrations without downtime.
    • Created a product and infrastructure with less than an hour of downtime over the last three years, despite 24/7 traffic.
    • Created tools to generate Excel reports for customers on demand.
    • Developed a dead-reckoning system to track rail car speeds.
    Technologies: Java ME, Python, C, MySQL, MongoDB, Memcached, Django, Linux, Debian, Celery

  • Senior Data Engineer

    2019 - 2020
    BCG GAMMA
    • Worked closely with the team of data scientists, enabling quick turnaround time for personalized offers and measurements at a chain of luxury retail stores.
    • Designed and implemented ETL pipelines, CI/CD, and automation for provisioning EMR PySpark clusters on demand for a personalization project.
    Technologies: Python, AWS, EMR, Airflow, Boto3, PySpark, Spark, S3

  • Senior Software Engineer

    2018 - 2019
    Piney Bowes
    • Reviewed and audited a 35 kLOC ETL implementation for geographical data processing.
    • Helped design and implement a new platform for ETL processing and normalization of geographical data from a variety of vendors.
    • Created new environments for a complex set of ETL pipelines on AWS including securing and arranging access to new VPCs and existing VPNs.
    • Created the new ETL pipeline for one vendor of geographical data, loading and transforming large amounts of data, testing the resulting output, and producing intermediate and redistributable datasets.
    • Created common/reusable stages for automating the database (SQL Server) loading/offloading using S3, bulk copies, and compression on EC2.
    Technologies: Groovy, Jenkins Pipelines, Python, Terraform, Airflow, AWS EC2, AWS ECS, AWS VPC, Jenkins, ETL

  • Back-end/CloudHSM

    2018 - 2018
    Sodlab
    • Built HSM-backed digital signatures for PDF from the ground up.
    • Set up automated provisioning of CloudHSM identities.
    • Integrated digital signatures and visual elements in PDF design.
    • Using Dropwizard, set up management and transaction API for digital signing of legal documents.
    • Implemented synchronous and asynchronous workflows for signing using single or two-factor authorization.
    Technologies: CloudHSM, AWS, EC2, Dropwizard, Java 8, PDFBox, PDF

  • Senior Consultant

    2017 - 2018
    Wrapp
    • Planned, designed, and implemented real-time streaming ETL solutions using an AWS stack, lowering information lag from six hours to one minute.
    • Coached technical leadership. Provided feedback and evaluations on the tech stack and work methods.
    • Implemented new serverless services in an existing microservice architecture in Python and Go.
    • Supported the sales organization with improved data modeling and performance improvements in the OLAP (Redshift) data store.
    • Planned and set up CI integration with AWS Codebuild.
    • Developed tools for identifying and analyzing performance issues in the analytics pipeline.
    Technologies: Go, Python, AWS Lambda, AWS ECS, AWS SSM, PostgreSQL, Redshift, Periscope, AWS Kinesis Firehose

  • Senior Cloud Architect

    2017 - 2017
    McKinsey
    • Built a secure data ingestion system.
    • Used S3, KMS, and CloudHSM to secure data and keys.
    • Built safe provisioning where ops needs to know no secrets.
    • Built a Dropwizard/Angular/PostgreSQL application from scratch, including design, implementation, operations, and documentation.
    • Integrated with multiple third-party authentication providers using SAMLv2 SP- and IdP-initiated authentication.
    Technologies: Java 8, Dropwizard, EC2, ECS, PostgreSQL, Ansible, Terraform, Beanstalk, CloudHSM, Angular, SAMLv2

  • Senior Developer

    2016 - 2017
    Assa Abloy Mobile Services
    • Developed in Java 8 EE7 on JBoss/Wildfly and Dropwizard.
    • Planned and implemented AWS migration and automation.
    • Wrote custom Ansible modules for securely deploying secrets to AWS using Amazon KMS and S3.
    • Fully automated deployments of CloudHSM clients.
    • Planned and implemented zero-downtime deployments.
    Technologies: AWS, Java 8, Ansible, EC2, RDS, AWS VPN, CloudHSM, LunaClient

  • Tech Lead

    2015 - 2016
    Dooer AB
    • Planned and helped implement a new platform for automated bookkeeping.
    • Assisted in building a development team from scratch.
    • Planned and executed automation of deployments and provisioning for the new platform.
    • Planned and set up data pipelines for accounting events feeding into accounting software and ML solutions.
    Technologies: Python, Node.js, AWS, Ansible, Flask

  • Ops Consultant

    2015 - 2015
    Wondersign
    • Helped migrate a product from physical servers to AWS.
    • Did load tests and advised on provisioning.
    • Together with others, performed final migration to the cloud.
    Technologies: AWS, PHP, Linux

  • Technical Lead

    2014 - 2015
    Registry of Scotland
    • Worked as technical lead of the Land Registry Act Project.
    • Worked to create modern web services for solicitors at the Registry of Scotland's Land Register.
    • Deployed a fully redundant system of web applications, interfacing with new and legacy systems.
    • Created a distributed logging and tracing system using Python logging and MongoDB.
    • Supported releases and operations for an entirely new technology stack at the Registry of Scotland.
    Technologies: MongoDB, Python, Flask, AngularJS, RHEL, RabbitMQ, Celery

  • Senior Developer

    2013 - 2014
    Ericsson
    • Built a new framework for non-functional testing of large distributed systems.
    • Created data bridges between Java and Python.
    • Enabled visualization of complex and heterogeneous test setups.
    Technologies: Java, Python, Jython

  • Consultant

    2005 - 2013
    Softhouse Consulting
    • Worked as the design team lead for a charging system node.
    • Developed a custom business intelligence tool for site managers integrated with the customer's ERP system.
    • Worked in a small team to create five complete and separate sales channels on a Django/AngularJS platform in six weeks.
    • Led the modernization of developer infrastructure, SCM tools, and source control for a customer site with 150 developers.
    • Developed a non-functional test framework for telecom nodes from the ground up.
    • Held courses and workshops in Python, Git, and Mercurial.
    Technologies: Java ME/SE/EE, Python, .NET, C, C++, MongoDB, MySQL, ETL, Systems intengration, Telecommunications networks, Charging Systems, Provisioning

Experience

  • Hgapi (Development)
    https://bitbucket.org/haard/hgapi

    A pure Python MIT Licensed API for Mercurial source control.

  • PyCon Sweden (Other amazing things)
    http://pycon.se

    I founded Sweden's version of PyCon, as well as the Swedish Python association Python Sverige, and was the chair for the first three years.

Skills

  • Languages

    Python 3, Python, Java, JavaScript, Go, C#, Groovy

  • Frameworks

    Flask, CherryPy, Django REST Framework, Dropwizard, Django, Cordova, GeoDjango, Angular, Spring JDBC

  • Libraries/APIs

    OpenLayers, Flask-RESTful, Yelp API, Google Maps, jQuery, Jenkins Pipeline

  • Tools

    Terraform, Ansible, Git, Mercurial, Apache Airflow, Amazon Virtual Private Cloud (VPC), AWS SDK, AWS IAM, Emacs, CVS, Microsoft Excel, Eclipse IDE, Jenkins, Docker Compose, AWS CodeDeploy, AWS CodeBuild, AWS CloudFormation, AWS ECS, Amazon SQS, Subversion (SVN)

  • Paradigms

    Continuous Integration (CI), DevOps, Functional Programming, Distributed Programming, Object-oriented Programming (OOP), ETL, ETL Implementation & Design, Continuous Delivery (CD), Agile Software Development, Clean Code, Maintainability, Test Automation, Microservices, Automated Testing

  • Platforms

    Amazon Web Services (AWS), Ubuntu, AWS EC2, Debian Linux, Linux, Debian, Magento, AWS Lambda, Windows, Docker, AWS Elastic Beanstalk, Oracle, J2ME

  • Storage

    AWS S3, MySQL, PostgreSQL, AWS RDS, Redshift, Microsoft SQL Server, MongoDB, AWS Data Pipeline Service

  • Other

    System Integration, Product Development, Data Engineering, Full-stack, Embedded Software Engineer, Automation Tools, Amazon CloudHSM, HSM, AWS Route 53, Home Automation, AWS CodePipeline, Automated Trading Software, Serverless, Embedded Systems, Ant, Cloud Microservices

  • Industry Expertise

    Trading Systems, Cryptocurrency

Education

  • Partially completed Master's degree in Computer Science
    2003 - 2004
    Blekinge Institute of Technology - Sweden
  • Progress towards a Bachelor's degree in Software Engineering
    2000 - 2003
    Blekinge Institute of Technology - Sweden

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