Christian Loef, Developer in Düsseldorf, North Rhine-Westphalia, Germany
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Christian Loef

Verified Expert  in Engineering

Back-end Developer

Location
Düsseldorf, North Rhine-Westphalia, Germany
Toptal Member Since
January 4, 2022

Christian is a senior back-end developer with six years of experience building applications for SME companies in Germany and Hong Kong. He specializes in cloud and serverless technology with a focus on AWS. Christian loves to work on applications built for users that are smooth to work with.

Portfolio

tecRacer
JavaScript, Node.js, AWS Lambda, Amazon DynamoDB, Amazon API Gateway...
Piloteers
AWS Lambda, Amazon DynamoDB, Amazon API Gateway, Amazon CloudFront CDN...

Experience

Availability

Full-time

Preferred Environment

Amazon Web Services (AWS), Serverless, AWS Cloud Development Kit (CDK), TypeScript, REST, HTML, AWS AppSync, GraphQL, Next.js, Full-stack

The most amazing...

...technology I've learned is the AWS cloud and the related serverless solutions that you can build. No need to focus on scalability and availability anymore.

Work Experience

Cloud Consultant and Trainer

2019 - 2020
tecRacer
  • Tracked and fixed bugs using Jira as a reporting tool.
  • Oversaw the development process of the front and back end for multiple web applications.
  • Developed an app that helps users manage their company savings and display their pensions.
Technologies: JavaScript, Node.js, AWS Lambda, Amazon DynamoDB, Amazon API Gateway, Amazon CloudFront CDN, Amazon S3 (AWS S3), Amazon Cognito, TypeScript, Python, Git, NoSQL, SQL, Amazon Web Services (AWS), AWS Amplify, Architecture, APIs, AWS Cloud Development Kit (CDK), CI/CD Pipelines, Development, HTML5, Instructor-led Training (ILT), Lambda Architecture, Information Technology, CSS, Lambda Functions, API Integration, HTML, AWS AppSync, GraphQL, Next.js, Full-stack

Full-stack Developer

2017 - 2019
Piloteers
  • Planned and developed multiple production apps for small and medium enterprises.
  • Analyzed the customer requirements and implemented those requirements in the front- and back-end areas.
  • Commissioned and maintained software products as part of my role.
  • Created an internal tool to simplify development processes.
Technologies: AWS Lambda, Amazon DynamoDB, Amazon API Gateway, Amazon CloudFront CDN, Amazon S3 (AWS S3), Amazon Cognito, Node.js, TypeScript, React, Redux, Python, SQL, NoSQL, Amazon Web Services (AWS), APIs, Architecture, CI/CD Pipelines, AWS CloudFormation, CSS, Git, HTML5, Development, Information Technology, API Integration, HTML, AWS AppSync, GraphQL, Next.js, Full-stack

Yacht Booking Platform

https://myachts.life
An entirely serverless platform for yacht booking.

I was the back-end developer and planned new features based on customer requests. I also focused on the model planning for the communication with the front end.

Business Model Application

https://tool.businessattack.com/
This service helps to create business models through the business model canvas. Users can create teams, manage boards, share them with people, and contribute in real time. Notes and comments can be added to each team on a board, and it's possible to drag and drop items from one part of the canvas to another section.

Languages

TypeScript, HTML, GraphQL, Python, SQL, JavaScript, CSS, HTML5

Libraries/APIs

Node.js, React, AWS Amplify, REST APIs, Mustache

Paradigms

Lambda Architecture, REST

Platforms

AWS Lambda, Amazon Web Services (AWS)

Storage

Amazon DynamoDB, Amazon S3 (AWS S3), NoSQL

Other

Serverless, Amazon API Gateway, Lambda Functions, API Integration, Full-stack, Architecture, CI/CD Pipelines, APIs, Infrastructure as Code (IaC), Development, Instructor-led Training (ILT), Electrical Engineering, Information Technology, IT Management, WebSockets, Amazon Cognito User Pools, Cloud

Frameworks

Next.js, Redux

Tools

Amazon CloudFront CDN, AWS AppSync, AWS Cloud Development Kit (CDK), Amazon Cognito, Git, AWS CloudFormation

Industry Expertise

Accounting

2019 - 2021

Master's Degree in Information Technology and Management

University of Applied Sciences Wismar - Wismar, Germany

2014 - 2019

Bachelor's Degree in Information Technology

University of Applied Sciences Düsseldorf - Düsseldorf, Germany

JANUARY 2023 - JANUARY 2026

AWS Certified Developer Associate

AWS

DECEMBER 2022 - DECEMBER 2025

AWS Certified Solutions Architect Professional

AWS

JUNE 2020 - DECEMBER 2025

AWS Certified Solutions Architect Associate

AWS

MARCH 2020 - PRESENT

AWS Authorized Instructor – Champion

AWS

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