Jannik Wempe
Full-stack Software Engineer & AWS Certified Developer
Heinrich-Böll-Straße 3, 27356 Rotenburg (Wümme), Germany
Web Presence
Summary
Drawing from experience across modern web technologies, cloud platforms, and system architecture, I build end-to-end solutions that create lasting value. My passion for learning and natural curiosity drive me to stay at the forefront of technological innovation.
- Full-stack TypeScript developer specializing in serverless architectures
- AWS Certified Developer & AWS Community Builder (serverless)
- 10+ years of experience in programming and consulting
- Building micro-SaaS products and custom Shopify applications
Core Skills
These represent my current primary technical focus areas and expertise, not an exhaustive list. As a continuous learner, my skill set is constantly evolving.
Full Stack Development (10+ years)
- TypeScript
- Node.js
- React.js
- Next.js
- Remix / React Router
- TailwindCSS
- Vitest, Cypress
- REST APIs, GraphQL
- PostgreSQL, MySQL, MongoDB
- …
AWS (5+ years)
- Serverless Architecture
- Event-driven Architecture
- Infrastructure as Code
- SST/AWS CDK
- IAM
- API Gateway
- Step Functions
- Event Bridge
- Lambda, SQS, SNS
- …
Work Experience
Platform Engineering Lead
05/2022 - 02/2025
Hashnode
Fully Remote
- Led Platform Engineering team for a platform serving 160,000+ MAU
- Led a team of developers and conducted internal coaching and mentoring
- Responsibility for third-party integrations and backend services (mostly on AWS)
-
Built scalable web analytics solution using AWS serverless stack (API Gateway, Kinesis Firehose, Lambda,
Timestream)
- Reduced costs by 70% while improving data quality
- Developed public GraphQL API (SST & Apollo on AWS Lambda)
- Created and managed email infrastructure handling 100,000+ weekly emails (Amazon SES)
- Scaled core platform features: webhook integrations, recommendation system, billing system
- Implemented AI-powered spam protection using Step Functions and LLMs
Tech: AWS, AWS CDK, SST, TypeScript, Node.js, Vercel, React, Next.js, TailwindCSS, Event Bridge, API Gateway, Lambda, Step Functions, SQS, SNS, SES, S3, Timestream, MongoDB, Redis, GraphQL, REST, Stripe, Paddle
Lead Software Engineer & Software Architect
02/2022 - 05/2022
iteratec GmbH
Hamburg, Germany
- Led replacement of legacy systems with modern information platform
- Designed system architecture and developed full-stack solution
- Built Angular frontend (TypeScript) and Spring Boot backend (Java)
- Implemented microservices deployment on OpenShift using Helm
- Integrated diverse service protocols (REST, GraphQL, AMQP)
- Facilitated Domain-Driven Design workshops with clients
- Mentoring for colleagues
Tech: OpenShift, Kubernetes, Docker, Helm, Java, Spring Boot, TypeScript, Angular, TailwindCSS, REST, GraphQL, AMQP, PostgresDB, Elasticsearch, Grafana, Kibana
Software Engineer
04/2020 - 01/2022
iteratec GmbH
Hamburg, Germany
- Developed information system for digital freight document processing for international logistics company
- Built responsive UI with Vue.js
- Implemented backend services in Scala
- Deployed solution using AWS Serverless Application Model (SAM)
Tech: Scala, TypeScript, Vue.js, Quasar, AWS SAM, SQS, API Gateway, Step Functions, Lambda, DynamoDB, S3, PostgresDB
Full-Stack Web Developer
07/2019 - 04/2020
Forschungsgruppe g/d/p
Hamburg, Germany
- Built web applications using Python (Django, Flask), JavaScript, and PHP
- Containerized applications with Docker
- Integrated APIs (REST) and implemented web scraping
- Analyzed and visualized data
- Managed MySQL and Redis databases
Tech: Python, Django, Flask, Docker, Node.js, TypeScript, Angular, MySQL, Redis
IT Consultant
06/2017 - 06/2019
PPI AG
Hamburg, Germany
- Developed software solutions using MS Access with VBA and SQL
- Served as business analyst between business units and IT for enterprise projects
- Received training in Python and Robotic Process Automation (RPA)
Tech: Python, MS Access, VBA, SQL, RPA
Research Assistant
08/2015 - 04/2017
Technical University of Braunschweig
Braunschweig, Germany
- Designed and developed custom WordPress solutions
Tech: PHP, WordPress, JavaScript
Client Projects
Full-Stack Developer | Production Control System
01/2025 - Present
Anonymous company
Individual software for internal production control for a medium-sized company.
Tech: AWS, SST, React, React Router, TailwindCSS
Full-Stack Developer & IT Consultant | Company's Online Presence
03/2020 - Present
Consulting, design and development of a webapp that represents the company and allows to book courses. Focus on SEO and performance.
Tech: TypeScript, React, Gatsby, Framer Motion, Astro, SolidJS, TailwindCSS, Chakra UI, Netlify, DatoCMS
Full-Stack Developer | E-Commerce Shop
03/2021 - 09/2021
11/2023 - 02/2024
Designed, developed and deployed a Shopify store that sells handmade furniture.
Tech: TypeScript, React, Shopify Hydrogen, TailwindCSS, Shopify, GraphQL
Full-Stack Developer & IT Consultant | Company's Online Presence
11/2022 - 05/2023
02/2025 - 03/2025
Designed, developed and deployed a multi-language company website for a physiotherapist education platform with a focus on SEO.
Tech: TypeScript, React, Next.js, TailwindCSS, Sanity, Vercel
Full-Stack Developer | Progressive Web App (PWA)
01/2022 - 03/2022
Developed a PWA that helps people to get to know the kiez Rixdorf in Berlin through some gamification.
Tech: TypeScript, React, Next.js, Chakra UI, PWA, Render, PostgresDB
Full-Stack Developer | E-Commerce Shop
2018
Design and development of a WooCommerce shop selling clothes for kids and babies with special needs.
Tech: PHP, WordPress, WooCommerce, JavaScript, MySQL
Personal Projects
Note: These are selected commercial projects – not an exhaustive list of my personal projects.
Shopify app to help merchants fight fraud and chargebacks. You can create custom rules to detect fraud and block orders automatically.
Tech: AWS, SST, TypeScript, React, Remix, Supabase, Shopify App
Analytics solution for GitHub actions. Understand which actions and repositories are most expensive. Exited because lack of time to maintain it.
Tech: AWS, SST, TypeScript, React, Remix, TailwindCSS, Supabase
Shopify app that allows merchants to easily generate SEO metadata using an LLM for products by specifying desired keyword.
Tech: AWS, SST, TypeScript, React, Remix, Supabase, Shopify App, LangChain.js
Subscriber analytics for the newsletter platform Kit (former ConvertKit). Understand your audience and grow your business.
Tech: AWS, SST, TypeScript, React, Remix, Turso
Education
Master of Science - Business Informatics
Technical University of Braunschweig, 08/2015 - 04/2017
Final Grade: 1.6
Bachelor of Science - Business Informatics
University of Applied Sciences Leipzig, 10/2011 - 09/2014
Final Grade: 1.4
Speaking & Appearances
The Commit Podcast – Hashnode
Discussed the development and architecture of Hashnode's public GraphQL APIs.
The MongoDB Podcast
Shared insights about using MongoDB at Hashnode and building scalable applications.
CDK Day Conference
Presented best practices for testing serverless applications using the AWS CDK Provider Framework.
Certifications
AWS Certified Developer - Associate wempe.dev/cv.