Daniel Sedlack - Senior Software Engineer

Q: Where is Daniel based?

Daniel is based in Hamburg, Germany .

Q: What languages does Daniel speak?

Daniel speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Daniel have?

Daniel has at least 18 years of experience. During this time, Daniel has worked in at least 7 different roles and for 10 different companies . The average length of individual experience is 2 years and 10 months . Note that Daniel may not have shared all experience and actually has more experience.

Q: What is Daniel's latest experience?

Daniel's most recent position is Senior Software Engineer at energielenker solutions GmbH .

Q: What companies has Daniel worked for in recent years?

In recent years, Daniel has worked for energielenker solutions GmbH , , Hausverwaltung , Statista Strategy GmbH & Co. KG , and WEG Am Inselpark .

Q: Which industries is Daniel most experienced in?

Daniel is most experienced in industries like Information Technology , Banking and Finance , and Telecommunication . Daniel also has some experience in Construction , Energy , and Real Estate .

Q: Which business areas is Daniel most experienced in?

Daniel is most experienced in business areas like Information Technology , Product Development , and Research and Development . Daniel also has some experience in Operations , Quality Assurance , and Finance .

Q: Which industries has Daniel worked in recently?

Daniel has recently worked in industries like Information Technology , Banking and Finance , and Construction .

Q: Which business areas has Daniel worked in recently?

Daniel has recently worked in business areas like Information Technology , Product Development , and Research and Development .

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Hamburg, Germany

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Experience

Feb 2026 - Jun 2026

5 months

Münster, Germany

Senior Software Engineer

energielenker solutions GmbH

Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
Defined time-based and dependency-based jobs
Deployed to managed Kubernetes clusters using Helm
Integrated InfluxDB Cloud
Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
Developed dashboards and visualizations in Grafana
Developed unit tests with mocking using pytest
Set up a CI/CD pipeline in GitLab

Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud

Jan 2026 - Present

7 months

Hamburg, Germany

Remote

Senior Software Engineer

Responsible for the architecture, implementation, and testing of a scalable order management system for trading financial instruments in Java (JDK 25) with Quarkus and Kafka.

Designed and implemented a messaging-based microservice architecture with Kafka
Integrated various external interfaces using REST, Protobuf, and proprietary SDKs
Implemented monitoring and observability using Prometheus endpoints and OpenTelemetry
Developed a persistence layer with Hibernate and PostgreSQL
Automated database schema migrations using Flyway
Wrote unit and integration tests with JUnit, Mockito, and REST Assured
Configured the JVM and native container builds using GraalVM
Set up a CI/CD pipeline on GitLab SaaS

Nov 2025 - Jan 2026

3 months

Hamburg, Germany

Senior Software Engineer

Hausverwaltung

Designed and implemented a solution for continuous monitoring of building infrastructure with Prometheus and Grafana, integrating data from heterogeneous sources (BACnet, MODBUS, SMTP, REST)
Deployed Prometheus and Grafana in a local container environment
Developed and integrated Prometheus exporters in Java with Quarkus for data extraction over the BACnet protocol, SMTP, and external REST web services
Deployed and integrated third-party Prometheus exporters
Created Grafana dashboards to visualize data from network, IT infrastructure, and building automation systems
Configured alerts and set up rules with multi-channel notifications using Grafana and Prometheus Alertmanager
Deployed Mimir for long-term data storage with S3-compatible storage on Cloudflare R2
Implemented cloud-based monitoring of local infrastructure using Cloudflare Workers
Managed cloud resources using Terraform IaC
Built and deployed via GitLab CI/CD

Technologies: Grafana, Prometheus, Mimir, Java, Quarkus, REST, CI/CD, GitLab, Container, Docker, Cloud, Cloudflare, S3, R2, IaC, Terraform

Aug 2025 - Present

1 year

Hamburg, Germany

Senior Software Engineer

Statista Strategy GmbH & Co. KG

Implemented and enhanced a Python-based ETL pipeline for transforming binary input data using the Dagster framework
Designed and implemented an event-driven ETL pipeline in Dagster
Downloaded data from S3-based object storage with MinIO
Specified a YAML-based format for defining transformation operations
Built an engine in Python to merge and transform data from multiple sources into a JSON format
Implemented schema validation and loading to a REST endpoint
Developed unit and integration tests with interface mocking using pytest
Implemented tracing using OpenTelemetry
Integrated into an existing GitHub Actions CI/CD pipeline
Deployed via IaC using Pulumi on Google Cloud Run

Technologies: Python, Dagster, pandas, pytest, REST, GraphQL, OpenAPI, CI/CD, GitHub Actions, Container, Docker Compose, OpenTelemetry, Jaeger, S3, MinIO, IaC, Pulumi, Cloud, GCP

Feb 2024 - Mar 2025

1 year 2 months

Hamburg, Germany

Architect / Lead Engineer

WEG Am Inselpark

Refactored an existing PLC-based smart home installation and designed the new system with backward compatibility
Developed new software for installed Wago PLCs using Codesys
Integrated building automation over BACnet and MODBUS protocols in Python
Designed and implemented multiple backend web services in Java using Quarkus
Developed the GUI with Vue.js and Vuetify
Set up and administered Linux servers, deploying containerized services
Monitored hardware and software using Prometheus and Grafana
Adapted the network architecture
Installed in residential units, including acceptance testing, documentation, and user training

Technologies: Java, Python, Codesys, Linux, Docker, nginx, Quarkus, Vue.js, Prometheus, Grafana, CI/CD, GitLab, Authentik, BACnet, MODBUS, MQTT, Home Assistant, OpenWrt, LaTeX

Jul 2021 - Dec 2023

2 years 6 months

Leverkusen, Germany

Senior Strategy Consultant

dimater trading technologies GmbH

Leading a team for research and development and running quantitative strategies for proprietary trading of financial instruments in international markets
Developing strategies in the Python ecosystem using data science frameworks (Pandas, NumPy, Matplotlib, Seaborn) and machine learning libraries (scikit-learn, XGBoost) in Jupyter
Designing and implementing infrastructure for data storage, research pipeline, signal generation, and trade execution
Designing and implementing backend services in Java with Quarkus
Implementing Python libraries for internal use
Building and managing CI/CD pipelines in GitLab
Deploying TimescaleDB as a time-series database, and Apache Iceberg with S3 object storage and Trino query engine
Deploying and integrating Apache Kafka
Building ETL pipelines with Apache Airflow
Setting up and managing a mixed server environment with cloud resources (AWS, Hetzner) and bare-metal Linux servers
Setting up monitoring with CheckMk
Running containerized services with Docker
Deploying and managing Keycloak for centralized SSO

Technologies: Java, Python, Linux, Docker, nginx, Quarkus, AWS, TimescaleDB, S3, Iceberg, Trino, CI/CD, GitLab, Pandas, NumPy, Matplotlib, scikit-learn, XGBoost, Kafka, Airflow, Tailscale, CheckMk, Keycloak

Mar 2020 - Jun 2021

1 year 4 months

Düsseldorf, Germany

Co-Founder

Adelomyia Technologies GmbH

Co-founded a company to develop quantitative strategies for proprietary trading of financial instruments in international markets
Architected, built and managed the initial infrastructure and strategies
Transitioned into dimater trading technologies GmbH after acquisition and integration into the dimater group

Technologies: Java, Python, Linux, Docker, nginx, Quarkus, AWS, TimescaleDB, S3, CI/CD, GitLab, Pandas, NumPy, Matplotlib, CheckMk, Keycloak

Jan 2012 - Present

14 years 7 months

Hamburg, Germany

Independent Engineer

Dipl.-Ing. Daniel Sedlack

Working independently on software and system development projects
Designing, implementing, and operating data and backend solutions
Setting up CI/CD pipelines and managing container environments
Advising and supporting clients on technical issues

Feb 2011 - Dec 2011

11 months

Hamburg, Germany

On-site

Software Developer

dtms GmbH

Software development with Enterprise Java for mobile messaging and billing infrastructure, including migration of legacy systems.

Java EE 5/6 (JBoss / Wildfly)
Apache Tomcat
JUnit
Maven
Git
Jira

Jul 2008 - Jan 2011

2 years 7 months

Hamburg, Germany

On-site

Working Student Operations / Software Development

Mobileview GmbH / dtms GmbH

Supporting operations
Developing internal tools for testing
SMS
Java EE
JBoss
Apache Tomcat
Jira
Git

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Banking and Finance, Telecommunication, Construction, and Energy.

Information Technology

Banking and Finance

Telecommunication

Construction

Energy

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Research and Development, Operations, Quality Assurance, and Finance.

Information Technology

Product Development

Research and Development

Operations

Quality Assurance

Finance

Summary

With more than 15 years of professional experience I have a technological perspective that combines breadth and depth, and I can deliver holistic solutions to my clients, from architecture through implementation to operations.

My focus is especially on developing data processing solutions (extraction, transformation, storage) with Python, particularly in conjunction with topics like machine learning and AI.

Another focus is developing backend services in Java using modern microservice frameworks like Quarkus, for everything from supporting internal business processes to customer-facing applications.

I round off my profile with solid experience in DevOps, and I am capable of setting up CI/CD pipelines as well as managing container builds and their deployment in Docker or Kubernetes environments.

I am also skilled in working with cloud resources and tools for monitoring and observability to support operations.

Skills

Java Se / Ee / Quarkus (Microservices, Jboss/Wildfly, Maven, Gradle, Intellij, Jpa/Hibernate, Jms, Jsf, Junit, Jax-Rs, Jax-Ws, Rest)
Python (Webdev, Scripting, Data Science, Pandas, Numpy, Matplotlib, Seaborn, Scikit-Learn, Xgboost, Fastapi, Sqlalchemy)
Devops (Linux, Nginx, Apache Http Server, Vpn, Tailscale, Sso, Iam, Keycloak, Bash)
Data Engineering (Dagster, Airflow)
Storage (Sql, Postgresql, Timescaledb, Mysql / Mariadb, S3, Iceberg)
Messaging (Kafka, Rabbitmq, Activemq)
Aws Cloud (S3, Ec2, Lambda, Step Functions, Iam, Rds, Eks/Ecs, Sns, Cloudwatch, …)
Container (Docker, Kubernetes)
Observability & Monitoring (Prometheus, Grafana, Opentelemetry, Checkmk)
Ci/Cd (Gitlab, Jenkins)
Gui (Angular, Vue.Js)

Languages

German

Native

English

Advanced

Education

Oct 2004 - Jan 2010

TU Hamburg-Harburg

Diploma in Computer Science Engineering · Computer Science · Hamburg, Germany

Statistics

Experience

Total positions 10

Experience in Information Technology 15.5 y

Avg length 2 y 5 m

Longest experience 14 y 6 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior Software Engineer, Architect / Lead Engineer, Senior Strategy Consultant

Main industries Information Technology, Banking and Finance, Telecommunication

Main business areas Information Technology, Product Development, Research and Development

Qualifications

Highest degree Bachelor

Profile

Created

June 2026

Last Update

July 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Daniel based?

Daniel is based in Hamburg, Germany.

What languages does Daniel speak?

Daniel speaks the following languages: German (Native), English (Advanced).

How many years of experience does Daniel have?

Daniel has at least 18 years of experience. During this time, Daniel has worked in at least 7 different roles and for 10 different companies. The average length of individual experience is 2 years and 10 months. Note that Daniel may not have shared all experience and actually has more experience.

What roles would Daniel be best suited for?

Based on recent experience, Daniel would be well-suited for roles such as: Senior Software Engineer, Architect / Lead Engineer, Senior Strategy Consultant.

What is Daniel's latest experience?

Daniel's most recent position is Senior Software Engineer at energielenker solutions GmbH.

What companies has Daniel worked for in recent years?

In recent years, Daniel has worked for energielenker solutions GmbH, , Hausverwaltung, Statista Strategy GmbH & Co. KG, and WEG Am Inselpark.

Which industries is Daniel most experienced in?

Daniel is most experienced in industries like Information Technology, Banking and Finance, and Telecommunication. Daniel also has some experience in Construction, Energy, and Real Estate.

Which business areas is Daniel most experienced in?

Daniel is most experienced in business areas like Information Technology, Product Development, and Research and Development. Daniel also has some experience in Operations, Quality Assurance, and Finance.

Which industries has Daniel worked in recently?

Daniel has recently worked in industries like Information Technology, Banking and Finance, and Construction.

Which business areas has Daniel worked in recently?

Daniel has recently worked in business areas like Information Technology, Product Development, and Research and Development.

What is Daniel's education?

Daniel holds a Bachelor in Computer Science from TU Hamburg-Harburg.

What is the availability of Daniel?

Daniel is immediately available full-time for suitable projects.

What is the rate of Daniel?

Daniel's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.