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Sebastian Hesse not available until 04/30/2021

Sebastian Hesse

Serverless Cloud Expert & Software Engineer, 3x AWS Certified, AWS Lambda, Java, Node.js, JavaScript

not available until 04/30/2021
Profileimage by Sebastian Hesse Serverless Cloud Expert & Software Engineer, 3x AWS Certified, AWS Lambda, Java, Node.js, JavaScript from Schmallenberg
  • 57392 Schmallenberg Freelancer in
  • Graduation: Master of Science
  • Hourly-/Daily rates: not provided
  • Languages: German (Native or Bilingual) | English (Full Professional)
  • Last update: 11.02.2021
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KEYWORDS
aws
AWS (Amazon Web Services)
AWS Lambda
Serverless
Serverless Architecture
AWS Certified Developer
AWS Certified Solutions Architect
Java
Spring
Javascript
Node.js
Microservices
Function as a Service
Software as a Service
Infrastructure as code
Automation Anywhere
Cloud Computing
Software Development
REST API
Scrum
Scrum Certified
Docker
Git / SVN
Github
Bitbucket
Continuous Integration (CI)
Continuous Delivery (CD)
Software Engineering
Backend & Frontend
Full-Stack Developer
PROFILE PICTURE
Profileimage by Sebastian Hesse Serverless Cloud Expert & Software Engineer, 3x AWS Certified, AWS Lambda, Java, Node.js, JavaScript from Schmallenberg
ATTACHMENTS
CV / Resume

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SKILLS
I'm a software engineer with more than 8 years of experience delivering high-quality software as well as using modern technologies like serverless functions on AWS Lambda for more than 3 years. I'm offering you:
  • exploration of serverless or cloud-native options and initial setup of your project
  • improving and further extending your existing serverless or cloud-native project
  • migrating existing applications into a serverless or cloud-native application
I have 3+ years experience in working with AWS, 8+ years experience in software engineering using Java/JavaScript/Node.js and more than a year of experience as an interview engineer for high-skilled engineers in top tech companies. I will support your project to produce high quality software and automate the development process as much as possible. My results will let you ship features faster, make your software more reliable and hence, stay ahead of your competition.

I'm an AWS Certified Solutions Architect (Associate), AWS Certified Developer (Associate), AWS Certified Cloud Practitioner and Certified Scrum Master.

Cloud Skills
AWS, AWS Lambda, AWS SAM, StepFunctions, DynamoDB, S3, Athena, EC2, CloudFormation, Kinesis, SNS, Api Gateway, CloudFront, Route53, IAM, KMS, SSM

Backend Skills
Java, Spring, Spring Boot, Hibernate, Jersey, Maven, JUnit, Selenium, OSGi, Velocity, MySQL, PostgreSQL, Node.js, REST APIs

Frontend Skills
JavaScript, TypeScript, HTML, CSS, Angular, Mithril, Bootstrap, jQuery

Tools
IntelliJ, Git, GitHub, GitLab, Bitbucket, Bamboo, Jira, Confluence, Jenkins
PROJECT HISTORY
  • 10/2020 - Present
    • ImmobilienScout24
    • 500-1000 employees
    • Internet and Information Technology
  • Full-Stack Web Development
  • I'm supporting a product team developing SSO (Single Sign-On) and user messenger related features. The software is hosted on AWS using EC2/ECS, RDS, SQS, AWS Lambda, DynamoDB, etc. The main programming languages include Java, JavaScript and TypeScript.
  • 06/2020 - 10/2020
    • Kurviger.de
    • Internet and Information Technology
  • Frontend Migration & Serverless Development
  • Part-time project. The existing JavaScript and jQuery code was migrated to components using the Mithril framework. Additional serverless functions were developed to support payment processes and other operational topics.
  • 01/2018 - 09/2020
    • K15t
    • 50-250 employees
    • Internet and Information Technology
  • Jira Plugin Development

  • My main responsibilities were developing new features and improving the existing code as well as the technical infrastructure on AWS.

    • Designed and implemented several Java and Node.js serverless functions to automate synchronizing data between Jira systems
    • Created a hybrid architecture using traditional EC2 servers and serverless functions for high scalability and high throughput of data
    • Optimized page loading speed by adding Hazelcast cache for a Spring Boot REST API on EC2 instances
    • Reduced security vulnerabilities in cooperation with a Bug Bounty program
    • Improved infrastructure automation process by using AWS CloudFormation
    • Increased app installations about 500% over two years
    Technologies: AWS, AWS Lambda, EC2, Kinesis, DynamoDB, S3, EC2, Step Functions, CloudWatch, CloudFormation, Java, Maven, Spring, REST API, Jersey, Hazelcast, JUnit, Node.js
  • 04/2020 - 05/2020
    • saas-marketplaces.com
    • < 10 employees
    • Internet and Information Technology
  • Serverless REST API Development

  • Built a collection of SaaS marketplaces to discover new opportunities starting a business. I was responsible for the technical architecture using a serverless stack.

    • Serverless REST API using AWS Lambda and API Gateway
    • Fully automated deployment process using AWS CloudFormation and GitHub Actions
    • REST API documentation using OpenAPI (Swagger)
    Technologies: AWS, Serverless, AWS Lambda, API Gateway, Kinesis, CloudFront, Route53, OpenAPI, Automation, GitHub Actions, REST API, Node.js
  • 04/2017 - 11/2017
    • K15t
    • 10-50 employees
    • Internet and Information Technology
  • On-premise to Serverless Migration

  • Migrated an existing on-premise application to a serverless cloud application. I was responsible to plan and execute the migration. The code base was adjusted to run on-premise and in the cloud.

    • Investigated existing architecture and code and proposed solutions to the product team using AWS Lambda
    • Designed and prepared the migration by introducing a common code package to share code between the on-premise and cloud code
    • Trained team mates in using the new cloud technologies like DynamoDB, S3, EC2 and AWS Lambda
    • Introduced continuous integration process using Bitbucket Pipelines and infrastructure provisioning using AWS CloudFormation
    • Reduced migration costs by adapting a hybrid architecture of EC2 instances and serverless functions
    Technologies: AWS, AWS Lambda, DynamoDB, Kinesis, S3, EC2, CloudWatch, CloudFormation, Java, Maven, Spring, Spring Boot, REST API, Jersey, Node.js
  • 07/2015 - 03/2017
    • K15t
    • 10-50 employees
    • Internet and Information Technology
  • Confluence Plugin Development

  • My main responsibilities were developing new features, improving the existing code and writing automated tests.

    • Developed backend and frontend features on Confluence apps "Scroll Versions" and "Scroll Translations" using Java and Angular
    • Provided technical and first-level support
    • Wrote technical and user documentation in Confluence
    Technologies: Java, Maven, Spring, REST API, Jersey, OSGi, Angular, JavaScript
  • 01/2014 - 07/2014
    • TravelTainment (Amadeus Leisure IT)
    • 250-500 employees
    • Internet and Information Technology
  • Internal Dashboard Extension

  • I was responsible for planning and developing an extension for an internal dashboard, including automated tests and technical documentation.

    • Created a technical architecture using Apache Camel for retrieving and aggregating data from different data sources
    • Communicated with various stakeholders to discuss their requirements and apply them in an agile process
    • Implemented the backend part as an OSGi module for Apache Felix using Spring and the frontend part using jQuery
    Technologies: Java, Spring, Hibernate, Apache Camel, MySQL, Maven, OSGi, Apache Felix, JUnit, Selenium
  • 09/2012 - 01/2014
    • TravelTainment (Amadeus Leisure IT)
    • 250-500 employees
    • Internet and Information Technology
  • Internal Dashboard Development

  • In a team of six people, I was responsible for developing various features for an internal dashboard service. This included writing automated tests and technical documentation.

    • Communicated with various technical and non-technical stakeholders to discuss their requirements and apply them in an agile process
    • Implemented OSGi modules for Apache Felix using Spring to dynamically enable and disable parts of the internal dashboard
    • Implemented a frontend using jQuery
    Technologies: Java, Spring, Hibernate, Apache Camel, MySQL, Maven, OSGi, Apache Felix, JUnit, Selenium
TIME AND SPATIAL FLEXIBILITY
100% Remote preferred. On-site availability can be negotiated for the beginning of the project.
OTHER
You can find more information about me on my website https://www.sebastianhesse.de and an always up-to-date CV at https://cv.sebastianhesse.de.
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