Senior Backend Developer, Experte für die Entwicklung von REST APIs
Aktualisiert am 12.11.2025
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 12.11.2025
Verfügbar zu: 60%
davon vor Ort: 0%
Backend Entwicklung
REST
Projektmanagement
TypeScript
Angular
AWS
OpenAPI
json schema
api development
TDD
Git
Clean Code
Frontend-Development
IAM
Keycloak
OAuth
OpenID Connect
OpenID
JWT
Project Controlling
agiles Projektmanagement
PHP
Deutsch
Muttersprache
Englisch
verhandlungssicher
Schwedisch
Alltagstauglich

Einsatzorte

Einsatzorte

luleå (+50km) stockholm (+50km)
Deutschland, Schweiz, Österreich

Ich arbeite langfristig ausschließlich remote von Nordschweden aus. Vor Ort Einarbeitung zu Projektstart oder zu bestimmten Meilensteinen sind bei Bedarf sind möglich.

möglich

Projekte

Projekte

7 Jahre 7 Monate
2018-04 - heute

Smart Abstract

Senior Web Developer PHP Symfony Backend Entwickler ...
Senior Web Developer

Working as Senior Backend Developer with main focus on maintaining and extending a heterogen application landscape with a Symfony1 legacy application and a Symfony 2 based API and administration application. Development of an OAuth2 Identity Server supporting OpenID Connect based on the Slim Framework. Implementation of an Angular2 based ePoster Tool including the Symfony2 backend API.

Dockerized the development environment and setup of the CI/CD integration based on an own Gitlab instance and capistrano deployment.

PHP Symfony Backend Entwickler MySQL gitlab ci/cd pipeline docker REST API Angular AngularJS Gitlab OAuth2 OpenID Connect (OIDC)
Smart Abstract GmbH
Bremen (remote)
11 Jahre
2014-11 - heute

Contractor / Consultant / Freelancer

Senior Web Developer PHP Symfony Backend Entwickler ...
Senior Web Developer

I have started my own business in Sweden offering the same services for the customers as I did with my German business: focus on web development based on Symfony, TYPO3 CMS and GravCMS for own clients and as freelancer for other companies.

Project excerpt:

Congree: fullstack development of an ePoster Tool for scientific conferences build with Angular als Single Page Application (SPA). Backend built with Symfony 3. Special javascript features in the frontend to support fullscreen presentation modus of eposter pdf files.

Congree: fullstack developement of a session planner tool based on AngularJS. Creation of REST Api for sessions of a scientific conference platform based on Symfony 3.

Donii: fullstack development for a US startup based on Symfony 3 supporting business processes for donations from private persons and companies. Backend with Rest API and administration application based on Sonata Admin. Frontend application build in Angular (Typescript). Staging and production deployment based on Capistrano.

Angiogenesis Foundation: fullstack development of a Symfony 2 based system to realize massive open online courses medical field of angiogenesis. Support for multiple learning modules with custom quiz engine for sections and modules, automatic evaluation and certification generation. Adminstration via Sonata admin and custom css visualizations and animations in the frontend.

Soummamedica: fullstack development of a mvp for a gereatric care network application based on Symfony 2. Implementation of features to support the replacement of patients process from hospitals to geriatric care institutions. Role based login features, profile creation for institutions and hospitals, geolocation based search and filter features. Complex multistep replacement application forms.

WOA! Agency: frontend development to build custom single page website with complex javascript animations based on the Green Sock Animation Platform (GSAP) and SVG.

European Crohn's and Colitis Organisation - ECCO: fullstack development based on Symfony 2. Closed network of members of ECCO with support for creation of scientific profiles and related studies, search and connection features.

PHP Symfony Backend Entwickler REST API Frontend Entwickler Angular AngularJS OpenAPI TYPO3 CMS Grav CMS
mehrere
Deutschland, EU, USA
1 Jahr 11 Monate
2019-04 - 2021-02

Starweb

Senior Backend Developer (PHP) Scrum REST OpenAPI ...
Senior Backend Developer (PHP)

Working as Senior PHP Backend Developer (Contractor) for a SaaS company providing shop solutions (ecommerce).

Maintaining OpenAPI specified REST Api. Creating a sdk for the Shop API. Developing the initial API for the custom CRM solution being consumed by a VueJS based frontend app based on OpenAPI and JSON Schema. Implementing support for auto generated documentation and request payload validation reusing existing JSON Schema model files.

Development of two microservices running on AWS ECS. One for imports of large xls based data files and one for an ERP integration. Both using the Shop APIs sdk. Docker hub based CI/CD pipeline with a AWS Lambda to trigger deployment.

DevOps work with AWS EB, AWS ECS, AWS EC2, AWS ElastiCache (Redis), AWS Elasticsearch, AWS RDS (MySQL), AWS Cloudwatch.

Maintaining and extending the inhouse application framework used in the two major applications and four microservices.

Agile development based on SCRUM, Github Code Reviews and Codeship as CI/CD solution for the main shop and the custom CRM applications.

Scrum REST OpenAPI SDK Development Backend AWS Docker Docker Hub CI/CD Pipeline Refactoring TDD Clean Code PHP MySQL Redis SQS RDS Elastic Search VueJS ReDoc
Starweb AB
Malmö, Schweden
10 Jahre 8 Monate
2004-04 - 2014-11

Freelancer

Web Developer PHP Administration Linux LAMP ...
Web Developer

Running my own business (in Germany) in the field of web development with a focus on: consulting, conception and development of content management systems based on TYPO3 and custom web application development based on Symfony for own customers and as a freelancer for large agencies.

Congree: fullstack development of platform for scientific conferences based on Symfony 1.

Joke Event AG: fullstack development of a custom white label car sharing presentation application for test drive events based on Symfony 1.

TYPO3 CMS: 30+ websites based on TYPO3 CMS including custom extension development to support business processes, templating, admin configuration, hosting, maintenance, documentation, running presentations and training courses.

PHP Administration Linux LAMP TYPO3 CMS Grav CMS MySQL Symfony
viele
Bremen, Deutschland

Aus- und Weiterbildung

Aus- und Weiterbildung

10 Jahre
2000-10 - 2010-09

Informatik-Studium

Diplom-Informatiker, Universität Bremen
Diplom-Informatiker
Universität Bremen

Studies of computer science with main focus on IT-Management, Database Systems, Agile Web Development and Logic at Universität Bremen with a degree as Diplom-Informatiker, Bremen, Germany

12 Jahre
1998-10 - 2010-09

Studium der Luft- und Raumfahrttechnik

Kein Abschluss, Universität Stuttgart
Kein Abschluss
Universität Stuttgart

Studies of aerodynamics at Universität Stuttgart, Stuttgart, Germany

Kompetenzen

Kompetenzen

Top-Skills

Backend Entwicklung REST Projektmanagement TypeScript Angular AWS OpenAPI json schema api development TDD Git Clean Code Frontend-Development IAM Keycloak OAuth OpenID Connect OpenID JWT Project Controlling agiles Projektmanagement PHP

Schwerpunkte

Rest API
Backend
OAuth2
OpenID Connect (OIDC)
Frontend

Produkte / Standards / Erfahrungen / Methoden

Administration Linux
API
AWS
Backend
Backend Entwickler
Clean Code
Elastic Search
Frontend Entwickler
Grav CMS
LAMP
OpenAPI
RDS
Redis
Refactoring
REST
REST API
Scrum
Symfony
TDD
TYPO3 CMS
  • TYPO3, TypoScript Templates, Extensionentwicklung, Community Arbeit
  • Gründung TYPO3 Usergroup Bremen
  • zertifizierter TYPO3 Integrator
  • Eclipse IDE
  • Prozessvisualisierungen (BPMN, BPML)
  • Symfony

Betriebssysteme

Dos
Mac OS
MS-DOS
SUN OS, Solaris
Unix
Windows

Programmiersprachen

Angular
AngularJS
C
nur die Basics im Studium
C++
geringe Erfahrung im Studiumsprojekt bei der Integration der freie Renderingengine OGRE
Java
Grundkenntnisse durch das Studium, kleine private Projekte, mobile Version
JavaScript
gute Kenntnisse im Rahmen der Webentwicklung. Hauptsächlich durch den Einsatz von JavaScript Frameworks wie jQuery, prototype und extJS
PHP
sehr gute objektoriente Kenntnisse
PL/SQL
gute Kenntnisse im Rahmen eines 2-Jahres-Projektes
Python
grundlegende Kenntnisse
Ruby
grundlegende Kenntnisse, Ruby on Rails
Shell
TeX, LaTeX
gute Kenntnisse
VRML

Datenbanken

JDBC
MS SQL Server
MySQL
Oracle
Postgres
SQL

Datenkommunikation

Ethernet
Internet, Intranet
LAN, LAN Manager
NetBeui
NetBios
PC-Anywhere
Public Networks
RFC
Router
RS232
SMTP
TCP/IP
Windows Netzwerk

Design / Entwicklung / Konstruktion

AutoCAD

Branchen

Branchen

  • Ecommerce
  • Scientific conferences & networks
  • Event planner
  • Call Center
  • Acticity provider (tourism)
  • Digital photo print

Einsatzorte

Einsatzorte

luleå (+50km) stockholm (+50km)
Deutschland, Schweiz, Österreich

Ich arbeite langfristig ausschließlich remote von Nordschweden aus. Vor Ort Einarbeitung zu Projektstart oder zu bestimmten Meilensteinen sind bei Bedarf sind möglich.

möglich

Projekte

Projekte

7 Jahre 7 Monate
2018-04 - heute

Smart Abstract

Senior Web Developer PHP Symfony Backend Entwickler ...
Senior Web Developer

Working as Senior Backend Developer with main focus on maintaining and extending a heterogen application landscape with a Symfony1 legacy application and a Symfony 2 based API and administration application. Development of an OAuth2 Identity Server supporting OpenID Connect based on the Slim Framework. Implementation of an Angular2 based ePoster Tool including the Symfony2 backend API.

Dockerized the development environment and setup of the CI/CD integration based on an own Gitlab instance and capistrano deployment.

PHP Symfony Backend Entwickler MySQL gitlab ci/cd pipeline docker REST API Angular AngularJS Gitlab OAuth2 OpenID Connect (OIDC)
Smart Abstract GmbH
Bremen (remote)
11 Jahre
2014-11 - heute

Contractor / Consultant / Freelancer

Senior Web Developer PHP Symfony Backend Entwickler ...
Senior Web Developer

I have started my own business in Sweden offering the same services for the customers as I did with my German business: focus on web development based on Symfony, TYPO3 CMS and GravCMS for own clients and as freelancer for other companies.

Project excerpt:

Congree: fullstack development of an ePoster Tool for scientific conferences build with Angular als Single Page Application (SPA). Backend built with Symfony 3. Special javascript features in the frontend to support fullscreen presentation modus of eposter pdf files.

Congree: fullstack developement of a session planner tool based on AngularJS. Creation of REST Api for sessions of a scientific conference platform based on Symfony 3.

Donii: fullstack development for a US startup based on Symfony 3 supporting business processes for donations from private persons and companies. Backend with Rest API and administration application based on Sonata Admin. Frontend application build in Angular (Typescript). Staging and production deployment based on Capistrano.

Angiogenesis Foundation: fullstack development of a Symfony 2 based system to realize massive open online courses medical field of angiogenesis. Support for multiple learning modules with custom quiz engine for sections and modules, automatic evaluation and certification generation. Adminstration via Sonata admin and custom css visualizations and animations in the frontend.

Soummamedica: fullstack development of a mvp for a gereatric care network application based on Symfony 2. Implementation of features to support the replacement of patients process from hospitals to geriatric care institutions. Role based login features, profile creation for institutions and hospitals, geolocation based search and filter features. Complex multistep replacement application forms.

WOA! Agency: frontend development to build custom single page website with complex javascript animations based on the Green Sock Animation Platform (GSAP) and SVG.

European Crohn's and Colitis Organisation - ECCO: fullstack development based on Symfony 2. Closed network of members of ECCO with support for creation of scientific profiles and related studies, search and connection features.

PHP Symfony Backend Entwickler REST API Frontend Entwickler Angular AngularJS OpenAPI TYPO3 CMS Grav CMS
mehrere
Deutschland, EU, USA
1 Jahr 11 Monate
2019-04 - 2021-02

Starweb

Senior Backend Developer (PHP) Scrum REST OpenAPI ...
Senior Backend Developer (PHP)

Working as Senior PHP Backend Developer (Contractor) for a SaaS company providing shop solutions (ecommerce).

Maintaining OpenAPI specified REST Api. Creating a sdk for the Shop API. Developing the initial API for the custom CRM solution being consumed by a VueJS based frontend app based on OpenAPI and JSON Schema. Implementing support for auto generated documentation and request payload validation reusing existing JSON Schema model files.

Development of two microservices running on AWS ECS. One for imports of large xls based data files and one for an ERP integration. Both using the Shop APIs sdk. Docker hub based CI/CD pipeline with a AWS Lambda to trigger deployment.

DevOps work with AWS EB, AWS ECS, AWS EC2, AWS ElastiCache (Redis), AWS Elasticsearch, AWS RDS (MySQL), AWS Cloudwatch.

Maintaining and extending the inhouse application framework used in the two major applications and four microservices.

Agile development based on SCRUM, Github Code Reviews and Codeship as CI/CD solution for the main shop and the custom CRM applications.

Scrum REST OpenAPI SDK Development Backend AWS Docker Docker Hub CI/CD Pipeline Refactoring TDD Clean Code PHP MySQL Redis SQS RDS Elastic Search VueJS ReDoc
Starweb AB
Malmö, Schweden
10 Jahre 8 Monate
2004-04 - 2014-11

Freelancer

Web Developer PHP Administration Linux LAMP ...
Web Developer

Running my own business (in Germany) in the field of web development with a focus on: consulting, conception and development of content management systems based on TYPO3 and custom web application development based on Symfony for own customers and as a freelancer for large agencies.

Congree: fullstack development of platform for scientific conferences based on Symfony 1.

Joke Event AG: fullstack development of a custom white label car sharing presentation application for test drive events based on Symfony 1.

TYPO3 CMS: 30+ websites based on TYPO3 CMS including custom extension development to support business processes, templating, admin configuration, hosting, maintenance, documentation, running presentations and training courses.

PHP Administration Linux LAMP TYPO3 CMS Grav CMS MySQL Symfony
viele
Bremen, Deutschland

Aus- und Weiterbildung

Aus- und Weiterbildung

10 Jahre
2000-10 - 2010-09

Informatik-Studium

Diplom-Informatiker, Universität Bremen
Diplom-Informatiker
Universität Bremen

Studies of computer science with main focus on IT-Management, Database Systems, Agile Web Development and Logic at Universität Bremen with a degree as Diplom-Informatiker, Bremen, Germany

12 Jahre
1998-10 - 2010-09

Studium der Luft- und Raumfahrttechnik

Kein Abschluss, Universität Stuttgart
Kein Abschluss
Universität Stuttgart

Studies of aerodynamics at Universität Stuttgart, Stuttgart, Germany

Kompetenzen

Kompetenzen

Top-Skills

Backend Entwicklung REST Projektmanagement TypeScript Angular AWS OpenAPI json schema api development TDD Git Clean Code Frontend-Development IAM Keycloak OAuth OpenID Connect OpenID JWT Project Controlling agiles Projektmanagement PHP

Schwerpunkte

Rest API
Backend
OAuth2
OpenID Connect (OIDC)
Frontend

Produkte / Standards / Erfahrungen / Methoden

Administration Linux
API
AWS
Backend
Backend Entwickler
Clean Code
Elastic Search
Frontend Entwickler
Grav CMS
LAMP
OpenAPI
RDS
Redis
Refactoring
REST
REST API
Scrum
Symfony
TDD
TYPO3 CMS
  • TYPO3, TypoScript Templates, Extensionentwicklung, Community Arbeit
  • Gründung TYPO3 Usergroup Bremen
  • zertifizierter TYPO3 Integrator
  • Eclipse IDE
  • Prozessvisualisierungen (BPMN, BPML)
  • Symfony

Betriebssysteme

Dos
Mac OS
MS-DOS
SUN OS, Solaris
Unix
Windows

Programmiersprachen

Angular
AngularJS
C
nur die Basics im Studium
C++
geringe Erfahrung im Studiumsprojekt bei der Integration der freie Renderingengine OGRE
Java
Grundkenntnisse durch das Studium, kleine private Projekte, mobile Version
JavaScript
gute Kenntnisse im Rahmen der Webentwicklung. Hauptsächlich durch den Einsatz von JavaScript Frameworks wie jQuery, prototype und extJS
PHP
sehr gute objektoriente Kenntnisse
PL/SQL
gute Kenntnisse im Rahmen eines 2-Jahres-Projektes
Python
grundlegende Kenntnisse
Ruby
grundlegende Kenntnisse, Ruby on Rails
Shell
TeX, LaTeX
gute Kenntnisse
VRML

Datenbanken

JDBC
MS SQL Server
MySQL
Oracle
Postgres
SQL

Datenkommunikation

Ethernet
Internet, Intranet
LAN, LAN Manager
NetBeui
NetBios
PC-Anywhere
Public Networks
RFC
Router
RS232
SMTP
TCP/IP
Windows Netzwerk

Design / Entwicklung / Konstruktion

AutoCAD

Branchen

Branchen

  • Ecommerce
  • Scientific conferences & networks
  • Event planner
  • Call Center
  • Acticity provider (tourism)
  • Digital photo print

Vertrauen Sie auf Randstad

Im Bereich Freelancing
Im Bereich Arbeitnehmerüberlassung / Personalvermittlung

Fragen?

Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

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