09.12.2025 aktualisiert

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40 % teilweise verfügbar

Search engineering lead, Software Engineer and Data Scientist

Düsseldorf, Deutschland
Nur Remote
Dr. rer. nat. Physik
Düsseldorf, Deutschland
Nur Remote
Dr. rer. nat. Physik

Profilanlagen

resume_bartnick_2023.pdf

Skills

JavaJavaScriptA/B TestingAPIsData AnalysisMicrosoft AzureBash ShellGoogle BigQueryC++Computer-ClusterCUDADatenbankenContinuous DeliveryData GovernanceDistributed ComputingElasticsearchProtocol BuffersApache HadoopApache HivePythonMachine LearningRedisPrometheusSQLGrafikprozessorGoogle CloudGrafanaBackendDatenstrategieGitlab-CiKubernetesApache KafkaElastic KibanaRestful ApisgRPCJenkinsMicroservices
A/B testing, Hadoop, Hive, Kafka, APIs, backend, Bash, BigQuery, C++, computer clusters, Continuous Delivery, data-driven insights, data governance, data strategy, databases, Distributed Systems, Elastic Search, Gitlab CI, Google Cloud Platform, Google cloud, Grafana, GPUs, gRPC, Java, JavaScript, Jenkins, Kibana, Kubernetes, machine learning, micro services, Azure cloud, CUDA, Prometheus, Protobuf, Python, Redis, REST, SQL

Erfahrung

Berufserfahrung5 - 10 Jahre
Freelancer seit2023

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Data Scientist / Developer

Mazars

Wirtschaftsprüfung, Steuern und Recht

500-1000 Mitarbeiter

As a data scientist and software engineer in the Data & Analytics unit at Mazars, I drive innovation and foster a data-driven culture within the organisation. Operating as a startup within a larger enterprise, our team of engineers and data scientists collaborates to develop automation software and machine learning products on the Azure cloud. We focus on establishing a robust data ecosystem, promoting data governance, and advocating for a comprehensive data strategy.

Search engineering lead

trivago
As a leader of two sub-teams comprising eight Java engineers, I
was responsible for people management and technical decisions
around a GCP-based microservice system that executes search,
auction, and ranking models at trivago. Under my guidance, my
team has fostered a data-driven decision-making approach for
engineering processes. By questioning and redesigning past
architecture decisions, the engineering team was able to increase
trivago's top-line revenue by more than 2% without adversely
affecting user metrics.

Software Engineer and Data Scientist

Hotel Search; trivago
As an engineer, I made architectural decisions and developed
backend products in the time of a challenging business situation
caused by the emergence of the COVID-19 pandemic.
During my tenure as a Data Scientist, I conducted a deep dive into
trivago's backend logs, resulting in the discovery and elimination
of several bugs. This led to a 20% decrease in the load on trivago's
advertisers.

Software Engineer / Data Scientist, Search Technology

trivago
As a member of a five-engineer team, I was part of the effort to
rebuild trivago's hotel search from scratch. We developed a
GPU-based algorithm to scan the entire hotel inventory under
strong latency constraints, which reduced response times by 90%
compared to conventional databases. We deployed our software
on the Google cloud, where it processes hundreds of requests per
second and serves prices for over 1 million hotels from more than
250 booking sites worldwide.

Data Scientist

BoostingIO
In this role, I created reports, machine learning models, and APIs
for multiple customers, including one of the largest drugstore
chains in China. Our team built a personalised text
recommendation engine that served thousands of users daily.

Independent Contractor

Cadence Translate and Dah Makan
(remote/Beijing)
As an independent contractor, one of my contributions was a
demand forecasting algorithm that analysed historical food sales
data and current business metrics. This algorithm reduced food
waste by more than 20% and helped Dah Makan expand its food
startup into a multi-million dollar company.

Researcher

Heinrich-Heine-University
Dusseldorf
My research focused on the dynamics of particles with
non-reciprocal interactions. I developed high-performance
simulations with CUDA and C++ to demonstrate that such systems
can maintain a non-equilibrium state with extreme temperature
gradients on the particle scale. I improved simulation times by up
to a factor of 80 using GPUs. I created a planning framework and
conducted analyses with Python on computer clusters with more
than 300 cores.

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