Jan B.
API Engineer (Design and Development of an API-first SaaS Product)
Experience
Jan 2022 - Jan 2023
1 year 1 monthAPI Engineer (Design and Development of an API-first SaaS Product)
Freelance
- Role / Methods: API Engineer
- API-first product design (OpenAPI 3, HAL) and development (NodeJS)
- Building DevOps pipelines with GitHub Actions in AWS architecture
- Technologies: OpenAPI 3, REST, HAL, NodeJS, JavaScript, TypeScript, AWS, AWS Lambda, Docker, GitHub Actions
Jan 2022 - Jan 2023
1 year 1 monthSoftware Developer, Consultant
Knowledge-Management-SaaS-Startup
- Role / Methods: Software Developer, Consultant; Pair Programming
- Building a software architecture for knowledge management SaaS
- Designing an event sourcing–based data structure
- Designing and implementing a data structure for highly connected graph data
- Developing a serialization tool for graph data
- Implementing backend/API
- Documentation with the C4 model
- Technologies: REST, CQRS, Event Sourcing, Event-Driven Architecture, Laravel, GitLab CI/CD, JSON:API, Stoplight Studio, SQL, Docker, C4 Model
Sep 2021 - Oct 2021
2 monthsConsultant (Distributed Ledger Project for Supply Chain)
Automotive Industry Company
- Role / Methods: Consultant
- Comparing distributed ledger/blockchain technologies
- Designing business processes and integrating them into DL technology in BPMN
- Designing a system architecture
- Technologies: BPMN
Nov 2020 - Sep 2022
1 year 11 monthsDresden, Germany
Research Assistant
ScaDS.AI Dresden/Leipzig
- Role / Methods: Research Assistant
- Designing and developing a toolkit for preprocessing MRI data (denoising, bias field correction)
- Diagnosing COVID-19 from lung X-ray images with a focus on explainable AI (XAI)
- Technologies: CNNs, deep learning, LIME, Grad-CAM, Python, TensorFlow/Keras
Sep 2020 - Aug 2021
1 yearSenior Software Developer, Consultant
ERP Software Vendor
- Role / Methods: Senior Software Developer, Consultant
- Building a web-based platform for mapping workflows on touchscreen terminals in manufacturing for an ERP software vendor
- Low maintenance and training effort as a business goal through simplified integration of SQL-driven logic from the existing solution stack
- Training developers and ERP project managers
- Ongoing support as needed
- Technologies: SQL/T-SQL, Microsoft SQL Server, React, NodeJS, REST, JSON, JSON Schema, YAML
Jul 2020 - Aug 2020
2 monthsSoftware Developer (Integration of Municipal EV Charging Stations and Collection of Charging Data in Apache Kafka)
Freelance
- Role / Methods: Software Developer
- Integrating municipal EV charging stations and collecting charging data in Apache Kafka (ETL pipeline)
- Technologies: Apache Kafka, Python, REST, OCPP (Open Charge Point Protocol)
Jan 2020 - Jun 2020
6 monthsBusiness Analyst, Consultant
Energy Provider
- Role / Methods: Business Analyst, Consultant
- Coordinating with relevant stakeholders
- Drafting user stories
- Developing a rating scheme for non-functional aspects
- Developing a rating scheme for technology selection
- Technologies: -
Apr 2019 - May 2019
2 monthsSoftware Developer, Consultant (Prototype for Green Power–based Control of a Switchable Outlet)
Freelance
- Role / Methods: Software Developer, Consultant
- Building a prototype for green power–based control of a switchable outlet
- Designing and developing a smart contract for the Ethereum blockchain
- Technologies: Solidity (Ethereum), NodeJS, Python
Feb 2018 - Sep 2019
1 year 8 monthsLeipzig, Germany
Junior Linked Data Consultant
eccenca GmbH
- Role / Methods: Junior Linked Data Consultant; Kanban
- Creating a SHACL definition for UI generation for a SKOS editor
- Evaluating the virtual graph feature of Stardog with R2RML mappings for relational databases
- Developing software to extract measurement and metadata from legacy systems as part of an ETL pipeline
- Developing software to generate measurement reports from RDF data
- Technologies: RDF, Java, Python, Jira, SHACL, SPARQL, Jekyll-RDF, SKOS, Stardog, R2RML, RDF/JSON, triplestore
Summary
I am a versatile freelance developer and consultant focusing on API design and implementation. With experience in shaping SaaS products, system architectures, and building prototypes for innovative solutions, I bring a wide range of skills to technically challenging projects. My expertise covers API design and development, event-driven architecture, CQRS, ETL pipelines, cloud architectures, and more.
In the past, I worked as a Junior Linked Data Consultant, dealing with semantic technologies and RDF. I also served as a Research Assistant at a German AI center, where I developed a toolkit for preprocessing MRI data and applied deep learning techniques to diagnose COVID-19 from X-ray images.
Languages
German
NativeEnglish
AdvancedEducation
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Data Science
Certifications & licenses
ASQF® Certified Professional for Project Management - Foundation Level
iSQI Group
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