Fachlicher Schwerpunkt dieses Freiberuflers

AWS, Serverless, PHP, JS, Golang, Kubernetes, SOA, Domain-Driven Design

verfügbar ab
01.09.2020
verfügbar zu
80 %
davon vor Ort
100 %
PLZ-Gebiet, Land

Einsatzort unbestimmt

Städte
Berlin
100 km
Winterberg, Westfalen
50 km
Schwedt / Oder
50 km
Kontaktwunsch

Ich möchte bevorzugt für Projekte in diesen Einsatzorten kontaktiert werden.

Position

Kommentar
  • Hands-on CTO
  • DevOps Engineer
  • Full-Stack Developer 

Projekte

10/2018 - Heute

1 Jahr 10 Monate

Mariano Deimel - IT-Beratung & Softwareentwicklung

Einsatzort
Berlin, Germany

02/2019 - 07/2019

6 Monate

Fotografen Online Service GmbH

Rolle
Head of Engineering (Interim)
Kunde
Fotografen Online Service GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Restructure the development team, create growth opportunities and address knowledge gaps through mentoring and weekly presentations (i.a. Design Patterns, DDD, CQRS, Event Sourcing). Strengthen the learnings about event-driven architecture by guiding the team through the process of building a sample application.
  • Collaborate with the Head of Product in project planning, dependency management, continuous process improvement, as well as defining OKRs to provide transparency to management and stakeholders.
  • Analyze the legacy web application (600k+ LoC, no tests, no documentation), identify technical debt and flaws in software design while also ensuring daily operations. Elaborate a technical vision to transform the monolith into an event-driven, multi-tenant SaaS platform to get prepared for scaling the business in US.
Kenntnisse

AWS [ S3

SQS

SNS

EC2

RDS

CloudFront

Elastic Beanstalk

Lambda

DynamoDB ]

Linux

Apache

PHP

JS

Go

Node.js

CakePHP

Memcache

Redis

MySQL

Kafka

Docker

Ansible

Terraform

04/2016 - 09/2018

2 Jahre 6 Monate

WeQ Global Tech GmbH

Rolle
Tech Lead & Head of System Operations
Kunde
WeQ Global Tech GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Hire talents for a world-class tech team, shape the engineering culture, and develop a highperformance team while implementing agile methodologies together with the Head of Product to improve the software development lifecycle.
  • Encourage knowledge-sharing about technologies, best practices and engineering principles (e.g. TDD, DDD, DRY, KISS, SOLID), also enforce coding standards to ensure high-quality code. Focus on mentorship, pair programming, and hands-on workshops (i.a. LPIC, AWS, MongoDB, Docker Swarm) to build autonomous teams and mature the DevOps mindset in the tech department.
  • Plan, design, develop a scalable and fault-tolerant performance marketing platform, processing 100+ million impressions per day, using machine learning to optimize conversion rates and increase revenue. Build a CI/CD Pipeline, Monitoring and cloud-based infrastructure with automation to operate 40+ (micro-)services at large scale.
Kenntnisse

AWS [ S3

SQS

SNS

EC2

RDS

CloudFront ]

Linux

Nginx

PHP

Go

JS

Symfony

Slim

Node.js

Redis

MySQL

MongoDB

ElasticSearch

Cassandra

Kafka

Docker

Ansible

Terraform

TICK Stack

02/2014 - 03/2016

2 Jahre 2 Monate

fashion4home GmbH

Rolle
Chief Architect & Head of System Operations
Kunde
fashion4home GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Build, develop and lead a team of high-skilled engineers accountable for maintaining the cloudbased infrastructure of the „Fashion For Home“ online shop, and providing technical guidance to development teams during the full software development lifecycle.
  • Drive Proof-of-Concepts, pilots and technology evaluations to accelerate the onboarding of useful technologies and solutions. Design, develop a Magento extension to replace the original MySQL-based persistence layer with a MongoDB implementation to speed up data access and build a real-time event system on top of the oplog.
Kenntnisse

AWS [ S3

SQS

SNS

EC2

CloudFront

DynamoDB ]

Linux

Apache

Varnish

PHP

JS

Redis

MySQL

MongoDB

Docker

Chef

Terraform

Gearman

Magento

Zend Framework

Silex

Bootstrap

11/2011 - 01/2014

2 Jahre 3 Monate

fashion4home GmbH

Rolle
Technical Architect
Kunde
fashion4home GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Provide technical leadership, develop and execute mid & long-term vision together with the CTO. Support systems operations and software engineering to improve uptime, reduce incidents and accelerate software deployments.
  • Build a CI/CD Pipeline, Monitoring and cloud-based infrastructure with automation while reducing operational costs by 20% using auto-scaling and spot-instances. Design, develop a Magento extension for partial caching to reduce page load times by 95% while keeping the possibility to inject dynamic content (i.a. product availability, recommendations).
Kenntnisse

AWS [ S3

SQS

SNS

EC2

CloudFront

DynamoDB ]

Linux

Apache

Varnish

PHP

JS

Redis

MySQL

MongoDB

Docker

Chef

Terraform

Gearman

Magento

Zend Framework

Silex

Bootstrap

09/2009 - 12/2012

3 Jahre 4 Monate

Mariano Deimel - IT-Beratung & Softwareentwicklung

Einsatzort
Berlin, Germany
Projektinhalte
  • Provide technical consultancy with a focus on e-commerce, software development and system administration, as well as high-performance Webhosting with Magento, OXID eSales, Joomla and Wordpress.
  • Plan, build, maintain bare-metal infrastructure with redundant networking and power supply in a Berlin colocation. Setup a fault-tolerant, high-available private cloud using DELL PowerEdge machines (KVM-Hypervisor) as compute nodes, and a redundant storage system build from selfassembled hardware (RAID-Level 5, DRBD, LVM, iSCSI).
Kenntnisse

AWS [ S3

SQS

SNS

CloudFront ]

Linux

KVM

Xen

DRBD

Apache

Nginx

Varnish

PHP

JS

HTML

CSS

Memcache

Redis

MySQL

Magento

Zend Framework

OXID eSales

Joomla

Wordpress

09/2011 - 10/2011

2 Monate

Beauty Trend GmbH

Rolle
Technical Architect (Freelance)
Kunde
Beauty Trend Holding GmbH
Einsatzort
Berlin, Germany
Kenntnisse

Linux

Apache

Varnish

PHP

JS

HTML

CSS

Nginx

Memcache

Redis

MySQL

Gearman

Magento

Zend Framework

jQuery

10/2010 - 08/2011

11 Monate

Möbilia GmbH & Co. KG

Rolle
Interim CTO (Freelance)
Einsatzort
Berlin, Germany

08/2008 - 09/2010

2 Jahre 2 Monate

KWICK! Community GmbH & Co. KG

Rolle
Scrum Master & Senior Software Developer
Kunde
KWICK! Community GmbH & Co. KG
Einsatzort
Berlin, Germany
Projektinhalte
  • Lead the Berlin cross-functional tech team. Plan sprints, moderate retrospectives and oversee the development progress to ensure alignment between scrum teams located in Berlin and Stuttgart.
  • Design, develop real-time, server-push components for the KWICK! Social Platform (IM & Chat, News Feed, Notification System), as well as the „KWICK! API 2.0“ which enables the „KWICK! Mobile" App and third-party provider accessing platform resources via RESTful endpoints.
  • Collaborate in design, planning, refactoring to transform the KWICK! Social Platform into a multitenant SaaS solution. Afterwards the foundation of social networks such as (URL gladly on request), each with 100k+ concurrent sessions.
Kenntnisse

Linux

Apache

HAProxy

PHP

JS

C/C++

HTML

CSS

Memcache

Redis

MySQL

Gearman

Sphinx jQuery

Zend Framework

04/2007 - 08/2008

1 Jahr 5 Monate

M & M Distributions GmbH

Rolle
Lead Software Developer
Kunde
M & M Distributions GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Lead a diverse, fast-moving development team to manage engineering plans and schedules for feature development, bug fixing, and software delivery, taking responsibility for these projects through their full lifecycle.
  • Plan, design, execute the transformation of the „Hotdigital“ e-commerce solution into a multitenant e-commerce platform (SaaS), work closely together with native speakers to translate the system into five languages and migrate 800+ shops afterward from individual deployments into the centralized system.
  • Develop extensions to integrate third-party providers into the e-commerce platform which empowers customers to increase their sales and revenue, such as auction platforms, fulfillment providers and price-comparison sites (i.a. eBay, Hood, Sellerfox, Afterbuy, ChannelAdvisor, Froogle, Idealo, Ciao).
Kenntnisse

Linux

Apache

HAProxy

PHP

JS

HTML

CSS

Memcache

MySQL

osCommerce

Zend Framework

jQuery

10/2006 - 03/2007

6 Monate

M & M Distributions GmbH

Rolle
Senior Software Developer
Kunde
M & M Distributions GmbH
Einsatzort
Berlin, Germany
Projektinhalte
  • Elaborate concepts and develop innovative features for the „Hotdigital“ e-commerce solution (i.a. Affiliate-Marketing Tracking & Dashboard, import & export of products, customers and orders via CSV / XML / SOAP).
  • Configure, maintain, monitor customer e-commerce shops to ensure their daily business, as well as 3rd-Level-Support for exclusive business partners and customers with Premium-Subscription.
Kenntnisse

Linux

Apache

HAProxy

PHP

JS

HTML

CSS

Memcache

MySQL

osCommerce

jQuery

Branchen

  • AdTech
  • eCommerce
  • Social Media

Kompetenzen

Produkte / Standards / Erfahrungen
Apache
CSS
DRBD
HTML
Joomla
Magento
Nginx
OXID eSales
Redis
Varnish
Wordpress
Zend Framework

Betriebssysteme
KVM
Linux

Programmiersprachen
jQuery
JS
PHP

Datenbanken
MySQL

Bemerkungen

I’m a passionate Software & DevOps Engineer, Tech Lead and CTO! Due to 10+ years of experience in various businesses like SaaS/PaaS, eCommerce, Ad-Tech and Social Media, I became an expert in developing cloud-native applications and distributed systems on a large scale. I am highly motivated, self-driven and always striving for the best possible solution.


Ausbildungshistorie

CERTIFICATIONS:
08/2011:

Berlin, Germany, Zend Certified Engineer (ZCE) Zend Technologies Ltd.

04/2010:

Stuttgart, Germany, Certified Scrum Master (CSM) Scrum Alliance, Inc.

04/2004:

Ulm, Germany, Ausbildereignungsprüfung (AEVO) Handwerkskammer Ulm