Sergej Tissen - Freelance Senior IT Consultant

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Munich, Germany

Experience

Jan 2023 - Present

2 years 7 months

Munich, Germany

Freelance Senior IT Consultant

React/TypeScript
AWS Serverless Architecture
Agile Coach

Oct 2017 - Dec 2022

5 years 3 months

Munich, Germany

Senior IT Consultant

codecentric AG

Architecture and development of a serverless-based platform (Industry: E-Commerce).
Set up a serverless AWS infrastructure.
Set up continuous deployment pipelines.
Design & implementation of business logic.
Technologies: React, TypeScript, JavaScript, Node.js, AWS, Java, Kotlin, GraphQL.
Design and development of a service to implement the requirements of the Digital Healthcare Act (Industry: Insurance).
Technologies: Java, Spring Boot, AWS, Kubernetes.
Consulting, architecture, and development of a microservices platform for internal business applications (Industry: Automotive).
Technologies: React, TypeScript, AWS, Java, Spring Boot, Kubernetes.

Jan 2016 - Sep 2017

1 year 9 months

Munich, Germany

Senior Fullstack Developer

Jochen Schweizer GmbH

Migration and further development of the e-commerce platform on AWS (Industry: E-Commerce).
Set up an AWS infrastructure for microservices.
Set up continuous deployment pipelines.
Design & implementation of microservices.
Organizational and technical support of trainees.
Technologies: React, TypeScript, JavaScript, Node.js, AWS, Docker.

May 2014 - Nov 2015

1 year 7 months

Munich, Germany

Scrum Master

Allplan GmbH

Lateral leadership of teams that developed an online project management portal and a CAD application (Industry: Construction).
Introduction and scaling of the Scrum process across 16 teams.
Training and coaching for the introduction of continuous integration.
Organizational and technical support of trainees.
Approach: Scrum, Kanban, DevOps.

Apr 2013 - Apr 2014

1 year 1 month

Berlin, Germany

Technical Project Manager

Aperto AG

Migration of existing web portals to an enterprise web CMS (Industry: Public sector).
Coordination of a development team.
Technical design including leading client workshops.
Creation & monitoring of project plans.
Cost estimation & proposal preparation.
Technologies: Magnolia CMS (Java), JavaScript.

Aug 2010 - Jun 2012

1 year 11 months

Berlin, Germany

Freelance Fullstack Developer (part-time during psychology studies)

Development of online registration portals for medical congresses (Industry: Healthcare).
Technologies: Java, Groovy, JavaScript.

Oct 2008 - Jul 2010

1 year 10 months

Berlin, Germany

Fullstack Developer

Lambdalogic GmbH

Development of online registration portals for medical congresses (Industry: Healthcare).
Backend & frontend development.
Release management.
Design & implementation of a generic form editor.
Technologies: Java, Groovy, JavaScript.

Mar 2007 - Aug 2008

1 year 6 months

Berlin, Germany

Fullstack Developer

Startup Alpha-Spirit

Development of an online e-learning platform for video-based courses (Industry: E-Learning).
Technologies: Java, JavaScript.

Summary

Development: React, TypeScript, JavaScript, Node.js, GraphQL, Next.js, Java, Spring Boot
Ops: CI/CD, Docker, Kubernetes, GitLab, Akamai, Infrastructure as Code
AWS: VPC, ECS, Lambda, S3, DynamoDB, Kinesis, Route53, CodePipeline
Architecture: Serverless, Microservices, Cloud-Native, Event-Driven, REST API Design
Approach: Scrum, Kanban, DevOps, Lean, SAFe

Languages

German

Native

Russian

Native

English

Advanced

Education

Oct 2010 - Mar 2013