Christian Loef
Verified Expert in Engineering
Back-end Developer
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
Experience
- Development - 6 years
- Amazon DynamoDB - 5 years
- AWS Lambda - 5 years
- Serverless - 5 years
- React - 5 years
- TypeScript - 5 years
- AWS Cloud Development Kit (CDK) - 2 years
Preferred Environment
Amazon Web Services (AWS), Serverless, AWS Cloud Development Kit (CDK), TypeScript, REST, HTML, AWS AppSync, GraphQL, Next.js, Full-stack, Webhooks, Consulting, Full-stack Development, System Integration
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
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.
Full-stack Developer
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.
Experience
Yacht Booking Platform
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
Education
Master's Degree in Information Technology and Management
University of Applied Sciences Wismar - Wismar, Germany
Bachelor's Degree in Information Technology
University of Applied Sciences Düsseldorf - Düsseldorf, Germany
Certifications
AWS Certified Developer Associate
AWS
AWS Certified Solutions Architect Professional
AWS
AWS Certified Solutions Architect Associate
AWS
AWS Authorized Instructor – Champion
AWS
Skills
Libraries/APIs
Node.js, React, API Development, AWS Amplify, REST APIs, Mustache
Tools
Amazon CloudFront CDN, AWS AppSync, AWS Cloud Development Kit (CDK), Amazon Cognito, Git, AWS CloudFormation
Languages
TypeScript, Python, HTML, GraphQL, SQL, JavaScript, CSS, HTML5, Go
Paradigms
Lambda Architecture, REST
Platforms
AWS Lambda, Amazon Web Services (AWS)
Storage
Amazon DynamoDB, Amazon S3 (AWS S3), NoSQL, PostgreSQL
Frameworks
Next.js, Express.js, Redux
Industry Expertise
Accounting
Other
Serverless, Amazon API Gateway, Lambda Functions, API Integration, Full-stack, System Design, Webhooks, Consulting, Full-stack Development, System Integration, Architecture, CI/CD Pipelines, APIs, Infrastructure as Code (IaC), OpenAI GPT-4 API, Code Review, Documentation, Real-time Data, Hotels & Lodging, Reservation Flow, Booking, Development, Instructor-led Training (ILT), Electrical Engineering, Information Technology, IT Management, WebSockets, Amazon Cognito User Pools, Cloud
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