Freelancer: System Design and Development, Java, Spring, OOD, SQL/NoSQL, Algorithms, Microservices

Freiberufler / Selbstst�ndiger

Remote-Arbeit

Verf�gbar ab: 27.09.2023

Verf�gbar zu: 100%

davon vor Ort: 100%

Top-Skills

Java

Backend

Algorithms

Multithreading

Linux

SQL/NoSQL

OOD

Microservice

Spring

Sprachen

German

English

Polish

Einsatzorte

L�nder

Schweiz

Remote-Arbeit

m�glich

Projekte

4 Monate

2021-05 - 2021-08

Implementation of audio/video platform

Senior Software Developer/Contractor Micronaut Spring Java ...

Rolle

Senior Software Developer/Contractor

Projektinhalte

implementation and support of audio/video management platform

Kenntnisse

Micronaut Spring Java Kotlin PostgreSQL RabbitMQ Docker Unix AWS Heroku Kibana Icinga Git GitHub

Kunde

SRF

Einsatzort

Z�rich

3 Jahre 6 Monate

2018-01 - 2021-06

Java development

Senior Java Developer/Contractor Git GitHub Spring Boot 2 ...

Rolle

Senior Java Developer/Contractor

Projektinhalte

guiding nearshore-team of 4 developers during the migration of REST services to new technology stack
driving implementation of backend services for new Insurance Portal
analyzing and optimizing performance for complex multilayer web application
implementing new integration testing framework allowing end-to-end testing for the backend

Kenntnisse

Git GitHub Spring Boot 2 Tomcat OpenFeign MongoDB REST Swagger Spring Boot DB2 TCP/IP multithreading Apache Lucene/Elasticsearch Hazelcast caching Equinox OSGi DynaTrace JMeter Java 8 JSON Spring Junit Mockito JBoss

Kunde

Allianz Technology AG

4 Monate

2017-10 - 2018-01

Consulting - Migration of a trading application

Java Solution Architect Java 7/8 Spring Spring Boot ...

Rolle

Java Solution Architect

Projektinhalte

advising on migration of Big-Monolithic trading application in order to improve its performance, scalability and maintenance
evaluation of Event-Driven approach and microservices architecture

Kenntnisse

Java 7/8 Spring Spring Boot Weblogic Apache Kafka

Kunde

Credit Suisse

9 Monate

2016-11 - 2017-07

Responsibility for the technical integration of the Calypso product

Senior Solution Designer Java 8 Spring Boot JAX-RS/REST ...

Rolle

Senior Solution Designer

Projektinhalte

responsible for technical integration of Calypso product within Post-Trading platform (SWIFT connectivity,
message routing and conversion, authorisation and authentication, client API integration)
evaluating possible integration strategies, preparing SWOT, Buy/Make analysis
implementing PoC to verify different solutions

Kenntnisse

Java 8 Spring Boot JAX-RS/REST JBoss JMS ActiveMQ WebSocket Git Linux SQL/Oracle

Kunde

SIX Group

2 Monate

2016-09 - 2016-10

implementing Java based Risk Engine

Senior Java Developer/Contractor Spring Java Batch JBoss ...

Rolle

Senior Java Developer/Contractor

Projektinhalte

implementing Java based Risk Engine for new portfolio management and advisory platform
leading software development activities, conducting code reviews, providing impact and gap analysis

Kenntnisse

Spring Java Batch JBoss Java 8 Oracle

Kunde

Julius Baer

1 Jahr 1 Monat

2015-02 - 2016-02

MIFID implementation

Java Solution Architect/Consultant Weblogic JSF Spring ...

Rolle

Java Solution Architect/Consultant

Projektinhalte

working on end to end solution for MIFID implementation within trading system
defining new architecture for settlement and securities regulation system (UML, Java EE, IBM Mainframe,�USS Host, JMS, MQ, IBM JRules)
analyzing new business requirements, existing limitations, pain-points and non-functional requirements
evaluating several solutions for new architecture based on costs, performance, maintenance, target operating�model

Kenntnisse

Weblogic JSF Spring Oracle JPA UML Java EE IBM Mainframe USS Host JMS MQ IBM JRules

Kunde

on request

2 Jahre 11 Monate

2012-04 - 2015-02

ensuring integration with event-driven platform

Senior Java Engineer/Consultant JUnit Mockito JSON ...

Rolle

Senior Java Engineer/Consultant

Projektinhalte

leading development of position keeping system ? bank strategic solution for security trading with critical�non-functional requirements (high availability, low latency, multithreading solution)
ensuring integration with event-driven platform (Java NIO, TCP/UDP sockets, multicast communication)
implementing logic and algorithms for efficient handling of ETD orders like position movements, premium/�margin calculation, underlying blocking/unblocking, order exercise/assignment
implementing QA strategies: unit tests, component and integration testing, building test automation framework

Kenntnisse

JUnit Mockito JSON XML processing Java NIO TCP/UDP sockets multicast communication

Kunde

UBS AG

5 Monate

2011-11 - 2012-03

refactoring of Java Rule Engine

Senior Java Engineer/Consultant JEE JMS/MQ Sybase ...

Rolle

Senior Java Engineer/Consultant

Projektinhalte

refactoring of Java Rule Engine (JEE, JMS/MQ, Sybase, XML/XSLT, RMI, Spring) to improve performance of trading orders processing
transforming complex business logic rules implemented in Python into Java based component

Kenntnisse

JEE JMS/MQ Sybase XML/XSLT RMI Spring

Kunde

Credit Suisse

1 Jahr 7 Monate

2010-04 - 2011-10

design and implementation of alerting and monitoring components

Senior Java Engineer/Consultant Java Apache Lucene multicast socket communication ...

Rolle

Senior Java Engineer/Consultant

Projektinhalte

development of core components within trading platform (FIX connection, order management and routing�system, business rule engine, monitoring and alerting system, order search tool) ? Java SE, IP processing,�Apache Lucene
working closely with business units on further automation of trading flow (prototyping new ideas, business�processes optimization)
design and implementation of alerting and monitoring components where high volume of data and low latency�processing were the key aspects

Kenntnisse

Java Apache Lucene multicast socket communication JAX-WS Oracle MS SQL Server Hibernate JPA

Kunde

UBS AG

2 Jahre 10 Monate

2007-06 - 2010-03

development of distributed CRM system

Java Specialist UML Java OOA ...

Rolle

Java Specialist

Projektinhalte

development of distributed CRM system (Clarify CRM, SOA, JEE, EJB, Oracle Advanced Queuing, Vitria)
leading migration of proprietary legacy components into Java platform

Kenntnisse

UML Java OOA design patterns Spring Clarify PLSQL

Kunde

Sunrise, TDC Switzerland AG

2005 ? 2007: implementing applications/services

Kunde: Deltavista AG
Rolle: Software Engineer/Project Manager

Aufgaben

implementing distributed, multi-tier applications/services
algorithms optimization for address search engine
managing application support and monitoring processes in direct cooperation with customers
designing architecture for reliable and efficient in-house systems integration components

Kenntnisse
JEE, XML, HTTP, TCP/IP, MQSeries, SOA

2004 ? 2005: Support for the establishment of a company

Kunde: California TOK, Inc
Rolle: Software Consultant

Aufgaben

supporting startup of new telecommunication company
providing technical know-how for subsystems integration
implementing common system interfaces

Kenntnisse
VOIP technology, TCP/IP, SIP, IPC under the LINUX platform, J2EE, EJB, WebLogic, Radius, C/C++, MySQL, Oracle

2004: distributed telecommunications system

Kunde: CGI-AMS - Development Center
Rolle: Business Analyst/Technical Consultant

Aufgaben

supporting acquisition of distributed telecommunication system
documenting business processes and building technical specification
supporting system maintenance, bugfixing and implementation for initial release
providing proof of concept for customer's system integration

Kenntnisse
J2EE, EJB, WebLogic, Vitria, reverse engineering, Oracle Advanced Queuing

2002 ? 2003: automation of testing process

Kunde: Motorola Software Development Center
Rolle: Software Engineer

Aufgaben

creating tools for automation of testing process
development and maintenance components for CDMA infrastructure devices
managing system technical support for global customers (global wireless telecommunication company in the USA)
work according to established software creating process
configuration management
managing company-wide internal projects (preparing design and technical specification)

Kenntnisse
J2EE, C/C++, VRTX, VxWorks, CMM level 5, Rational ClearCase

2000 ? 2002: development applications according to RUP methodology

Kunde: The Polished Group S.A.
Rolle: Software Engineer/Team Leader

Aufgaben

development of multi-tier, web-based applications according to RUP methodology
designing system architecture using UML
implementing system components as web services
code optimization and verification, writing documentation and performing unit tests
designing databases schema
managing team of 5 developers, tasks estimation and assignments, mentoring junior developers

Kenntnisse
J2EE, JSP, XML, XSL, HTML, Rational Rose, SOAP, MS SQL, Oracle

Aus- und Weiterbildung

1995 - 2000
Institute of Technology in Wroclaw (Poland) - Computer science department Faculty: Software Engineering
Degree: Master of computer science

1990 - 1995
Electric technical college

COURSES/ CERTIFICATIONS
2017
SAFe - Scaled Agile Framework

2009
Developing Web Services with WebLogic 9.2

2008
Sun Certified Programmer for the Java 2 Platform

2007
Clarify CRM

2002
TUXEDO, OS/390, DB2

Position

Experienced software engineer, architect and technical leader looking for a challenging assignment.

Kompetenzen

Top-Skills

Java Backend Algorithms Multithreading Linux SQL/NoSQL OOD Microservice Spring

Produkte / Standards / Erfahrungen / Methoden

Technical Skills

several years of experience in software design and development ? working as consultant, leading engineer and architect
acting as main point of contact for technical and business related issues
mentoring and supervising other developers, conducting code reviews and technical interviews
very good understanding of algorithms and data structures - searching, sorting, complexity, graph, tree and heap algorithms
practical experience with distributed system architecture and design concepts, working on functional and nonfunctional requirements
expertise in OOD, UML, code refactoring, applying design patterns ? good theoretical background and real hands-on experience
practical experience with functional programming concepts, prototyping simple trading strategy engine using Scala and Play framework
extensive technical knowledge and experience with Java technology including performance optimization, memory management, multithreaded programming and networking
know-how of network programming, concepts and protocols ? sockets, TCP/IP, UDP, multicasting
hands-on experience with other programming languages like JavaScript, Scala, Kotlin, Python, C/C++, SQL, awk, Unix shell
good overview of full lifecycle of software development ? working according to RUP, SCRUM and SAFe
introducing coding standards and best practices, doing research on new technologies and tools

Vertrauen Sie auf GULP

Im Bereich Freelancing

Im Bereich Arbeitnehmer�berlassung / Personalvermittlung

Fragen?

Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

Name E-Mail-Adresse Ihre Frage

Telefonnummer Unternehmen

Ich habe die Datenschutzbestimmungen gelesen und bin damit einverstanden.

Das GULP Freelancer-Portal

Direktester geht's nicht! Ganz einfach Freelancer finden und direkt Kontakt aufnehmen.