Adrian Achihăei verfügbar

Adrian Achihăei

Data and Software Engineer

Profilbild von Adrian Achihei Data and Software Engineer aus Kirchseeon
  • 85614 Kirchseeon Freelancer in
  • Abschluss: Diplom-Informatiker Technische Universität Iasi
  • Stunden-/Tagessatz: nicht angegeben
  • Sprachkenntnisse: deutsch (verhandlungssicher) | englisch (verhandlungssicher)
  • Letztes Update: 17.03.2020
Profilbild von Adrian Achihei Data and Software Engineer aus Kirchseeon
Programmiersprachen (alphabetisch) 
C, C++, Go (golang), Java, JavaScript, Python, R, Scala, Shell

Daten Platformen 
AWS, Azure, DataBricks, Cloudera, Hortonworks, MapR, Kubernetes

Machine Learning
TensorFlow, ROS, Spark/Hadoop, Python scientific stack

ROS (Robot Operating System), G code

Datenbanken / SQL 
Spark/SQL, PostgreSQL, MySQL, Oracle, NoSQL, HBase, Hive

Linux, Unix, MacOS, Android, iOS, ChromeOS, Windows 

TCP/IP, RPC, gRPC, SMTP, SNMP, Websockets
  • 05/2019 - bis jetzt

  • Beratung / Data Engineering, Machine Learning
    • Automotive sensor data acquisition, filter and store
    • Data Engineering Architektur 
    • Data Platform setup and maintenance
    • Data Analysis, Data Visualization 
    • Coaching and Training
    • Data Platforms, Cloudera
    • ROS (Robot Operating System)
    • Networks and Sensors: LiDAR, GPS, Cam, CAN, PoE
    Tools: Dell Cluster, Embedded
    Remote Teams

  • 01/2019 - bis jetzt

  • Self-Driving Car / Data Engineering, Machine Learning
    • Data Engineering
    • Clusters provisioning and maintenance
    • Perception, Sensor Fusion, Mapping
    • Data Analysis, Data Visualization 
    • Coaching and Training

    TensorFlow, ROS, Spark/Hadoop, Python scientific stack
    Networks and Sensors: LiDAR, GPS, IMU, Cam, CAN, PoE 
    Platforms: AWS, Azure, Google cloud, Kubernetes, ROS (Robot Operating System)
    Linear Algebra libraries, Visualization libraries
    Programming languages: Go (golang), Python, Scala, Javascript, C, C++

  • 01/2017 - 12/2018

  • Digital solutions / connected cars - Beratung
    • Technical project coordination
    • Analysis of sensor data for autonomous driving and defense sector
    • Main contributor to the open source project 
    • TensorFlow, ROS, Spark/Hadoop, Python scientific stack - pandas, numpy, scipy, scikit-learn,, Kubernetes, Algebra libs, Visualization libs 
    • C, C++, Go (golang), JavaScript, Python, Scala

  • 04/2016 - 05/2016

  • Data platform provider - Professional Services
    • Extensive services around Hadoop, Spark, global event streaming, real-time database capabilities, enterprise storage
    • Platform deployment, maintenance, best-practices
    • Data engineering expertise on data migration, planing, tuning, optimization and administration of big data setups 


    • MapR Converged Data Platform
    • Projektabwicklung: Professional Services 

  • 09/2013 - 03/2016

  • Process large amounts of automotive measurement data
    • Big Data projects for the premium segment of the automotive industry
    • Hadoop cluster operations; machine learning workflows, evaluation; data visualization;
    • Data Engineering: data ingest and converting automotive formats (TTL, CAN, Flexray, ADTF, MDF 3-4, ATFX) to HDFS/MapR-FS friendly formats; various Hadoop InputFormat and RecordReader implementations
    • Time series and sensor data analysis
    • Training and coaching 


    • Scala, Python scientific stack - pandas, numpy, scipy, scikit-learn, Hadoop streaming M/R, Spark, NLTK, Elasticsearch / Lucene, C, C++
    • Platforms: MapR, Cloudera, Hortonworks
    • Projektabwicklung: Professional Services 

  • 03/2013 - 06/2013

  • JEE Architecture
  • J2EE-Entwicklung, Deployment, Webapplikation: 

    • Consulted, from the architectural point of view, on the integration of various financial services APIs and platforms
    • Training and Coaching: Hadoop Platform workshop


    • Spring, JEE, Servlet, HTML, JSF, OR-Mapping, XML/XSL, Cryptography 
    • Applikationsserver: various JEE App Servers 
    • Datenbank: Oracle 

  • 09/2009 - 02/2013

  • Semantic search engine, Analytics tools, Reputation management
    • Semantic search engine
    • Team coaching, clustering (algorithms, similarity metrics), search index generation, time series analysis, trends, scoring and ranking, review classification, semantic and sentiment analysis, geocoding, natural language processing
    • Distributed system architecture - complete data flow from data crawling to analysis, indexing and data visualization. Compile context free grammars for text extraction and other natural language processing (NLP) tasks


    • ? Hadoop (since 2009 - release 0.19.1), Java, Javascript node.js, Python, Nltk (NLP), git, protoc, R (statistische DSL), Datenvisualisierung d3js ggplot2, google API, Data mining - weka, Linux

  • 06/2003 - 08/2009

  • Financial services and global payment solutions provider
    • Customer Management System, Click2Pay Portal, prepaid virtual MasterCard, risk management and Transactions system. 
    • Develop transactions components, data analysis and storage, accounting algorithms as well as data warehouse. 
    • Test strategies, risk management, code integration, deployment and release management, change requests and change impact analysis.


    • Java, J2EE, C++ (STL, boost), Oracle, JavaCryptography, yacc bison / flex, ANTLR, JMeter/JUnit, soap, wsdl 

  • 04/2001 - 04/2003

  • Community application server for multimedia sector
    • Migrate the existing community application server to J2EE standard so that it could be deployed under Bea Weblogic, WebSphere and JBoss. 
    • Porting EJB and core components; identification of design patterns and transaction boundaries; session handling, replication balancing, clustering,
    • Implementation of resource adapters for integration with other applications (Siebel, Exchange server ...) using Connector Architecture unmanaged approach; 
    • Application management and monitoring (JMX), trade-offs. I also wrote C# .NET components with the Interop technology for communication between the java server and Exchange server 5.5 using CDO over a shake-hand socket protocol. 


    • Technologies: J2EE (EJB, Servlet, JMS, JMX, JNDI, JAAS), UML , Java 2 SDK, XML/XSLT, HTML, RMI-IIOP, Oracle9i, Bea Weblogic Platform 7.0, IBM Websphere, C++ (STL; boost)

  • 06/2000 - 03/2001

  • Mobile marketing system - Entwicklung
    • Extend parts of the existing mobile-commerce framework
    • Scale mobile auctioning to hundred of thousands transactions. 
    • Servlet base communication with an IVR system (Interactive voice response) including socket connection to upload sound files into IVR. Public web page servlets, changes to administration web page and tools
    • Design and implement a monitoring and testing tool. Implement part of framework that used various xml/xsl proprietary libraries.


    • Java, J2EE, C++ (STL, boost), Oracle, JavaCryptography, yacc bison / flex, ANTLR, JMeter/JUnit, soap, wsdl 

  • 01/1997 - 01/2000

  • Weitere Freiberufliche Projekte
    • Application to organize, index and query of juridical texts dated between 1860 and 1999, search function, personalize selections and save results and reports, processing natural language (NLP). 
    • Filter algorithms, failure statistics and failure compensation for data measurements with geodesic GPS stations from Dassault (DGPS). Apply digital transformations from WGS84 to Romanian Stereographic-70 coordinates, algorithms for secant projections on Krasovski ellipsoid. Import of data in AutoCad and/or ArcINFO. The implementation was mainly in Java with a few C++ modules. 
    • Financial Software