Guillaume Herrmann Email & Phone Number

New York, Us

(Joined Symphony as part of acquisition of Cloud 9 Technologies, LLC in 2021).- Current hands-on architect and technical manager for a geographically distributed team of 8 people developing solutions for the financial industry that uses turret voice trading based technology (for example commodities trading).- Architected, developed and tested event based multi-tenant and multi-region backend system for voice trading application built on a micro services architecture and AWS using Java Spring Boot, S3, DynamoDb, Kinesis, SQS, SNS, Redis, Elastic Search, Lambdas, EKS, Aurora, Event Bridge and RabbitMQ,.- Architected, developed and tested a solution to transcribe audio trading data to text utilizing Google Cloud Speech to Text in order to offer financial instructions compliance and surveillance abilities.- Architected, developed and tested APIs to provide trading data programmatically to customers and allow customers to conduct surveillance on trading activity.- Architected, developed and tested API to allow financial institutions to trigger a trading kill switch in real time using RabbitMQ and built in APIs inside of the trader desktop application.- Deployed the platform in 4 AWS regions in order to provide best service latency to trading centers in New York, London, and Asia Pacific locations and provide a cost effective hot-hot disaster recovery solution.- Architected, developed and tested ability for the platform to automatically fail over from one deployed region to another in case of a degradation event.- Architected, developed and tested a solution for tenant based encryption of trading data.- Continuously architect, develop and test new features for sales side, brokers and buy side institutions that use the trading platform.- Provide technical expertise in meeting with sales and product engineering during new customer bidding processes or when a customer would like to utilize the platform to solve for a specific new use case.

- Re-developed MVP solution to full fledge event based micro services platform running on containers utilizing AWS.- Migrated MVP solution to Java from PHP.- Decomposed monolithic solution into business domain micro services.- Migrated MVP solution from EC2 compute to containers on EKS.- Migrated trading storage from single MySQL database to Data Lake solution using AWS DynamoDb, AWS Kinesis, and S3.- Migrated monolithic polling batch data processing job to event based ETL pipeline using AWS Kinesis and AWS Kinesis Firehose.- Architected, developed and tested APIs to serve trading data to customers.- Architected, developed and tested new features on voice based trading activities to onboard Tier 1 financial institutions.- Architected, developed and tested a solution to store trading data abiding by General Data Protection Regulation (GDPR) requirements.- Promoted to backend software team manager in 2019.

New York, Ny, Us

- Lead developer for low latency post trade risk valuation and risk limit enforcement platform for the institutional trading flow. The platform evaluates risk on client positions with an average of 30 million position updates daily resulting from trading and market data fluctuations. The platform was designed to maintain a one second end to end service level agreement from trade execution to position risk enforcement and is used in Americas, Europe and Asia Pacific. - Developed and tested distributed services in a cluster environment to source aggregated trade updates, market data, and reference data, evaluate risk on positions across fifty sensitivities and enforce risk limits by actively stopping client trading if a risk limit is breached. Each service has multiple instances spread across hardware in a cluster and communicate via Kafka messaging. - Developed and tested REST and streaming web services as backend of web portal allowing external clients to visualize risk on their positions. - Developed and tested services as backend to internal workstation application. Services allow internal users to visualize risks on blotters, drill down on positions and change risk limits on thirty sensitivities at a position level. Services uses AMQP to stream interactive query responses to workstations using private queues.- Interfaced with business to gather requirements and ensure the platform’s functionality meets the business demand. - Technical lead of a team of 3 developers. Responsible for sprint planning, code reviews and production releases planning.Technologies: Core Java 8, Spring (boot, web, data), Hazelcast, JMS, REST services, heavy use of concurrent package, Kafka, AMQP QPID, Thrift, Mongo DB, JMX, Nirvana (Terracotta UM), Azul Zing JVM, Velocity, Unix, JUnit, Gradle, Bitbucket, Tomcat.

New York, Ny, Us

Front office Java developer focused on equity derivatives volatility applicationTechnologies: core java, concurrency package, oracle 11g, Google procotcol buffers, ICE, solace messaging, Bloomberg Data License, Bloomberg Per Security.

Paris, Fr

Java developer in Post-Trade routing and management group.- Developed and tested large throughput, low latency system to route trade executions, trade settlements and book keeping entries from Front office to Broadridge's back office clearing systems.Technologies: Hibernate, Spring, SQL server, H2, JUnit, DBUnit, Velocity, AOP, Dozer Bean to Bean mapper, Maven, SVN, Eclipse.

Burlington, Ma, Us

Senior developer on Ordered Management System (OMS) and Execution Management System (EMS) specialized on REPOs.- Developed and tested order creation screen for bilateral, fixed or variable rate REPOs. Integrated the capability to trade REPOs in the Charles River's IMS workflows. - Developed and tested visual collateral dashboard to allow portfolio managers to track asset movements associated with REPO orders bookings and maturing.- Developed and tested screens to track termed and open REPOs life-cycle such as modifying REPO terms and repricing collateral. Technologies: C# WinForms

Us

(Boston, MA)- Developed and tested buy side real time FOREX spot trading platform aimed at aggregating liquidity and pricing on currency pairs from several trading networks. Trading platform supported market and limit orders.- Developed and tested market data Level 1 and Level 2 feeds from Reuters, ICAP EBS, DB FX and Hotspot to time series database for analytics processing.- Developed and tested data exports from FOREX trading platform to internal trades capture system for middle office processing.- Gathered requirements from FOREX trading desk and performed integration and system test on trading platform.- Developed Java API for accessing Bloomberg data via both Bloomberg Terminals and Bloomberg servers. The API was designed to easily and efficiently access current, historical, real time market, intra day tick and intra day bar data on financial securities.- Developed 80% of the time, design and communications 20%.

Paris, Fr

(New York City, NY & Jersey City, NJ)Architect / Lead Developer for a hedge fund referential and risk application for loan derivatives using .NET 1.1 and .NET 2.0 technologies.- Developed main deal risk calculation module of the application taking into account due diligence from Risk Team and market value of counterparty’s positions.- Interact with trading desk and risk business team to define requirements.- Review and validate design of each new functional modules being implemented.- Mentor development team through learning sessions and code reviews.- Estimate development costs, schedule, assign and keep track of tasks.- Developed persistence layer of application using ADO.NET and multi threading targeted at a Sybase database.- Developed reusable C# framework components to provide common facilities.- Migrated application from .NET 1.1 to .NET 2.0 framework.Designed and developed 75% of the time, communications and conducting code reviews 25%.

Armonk, New York, Ny, Us

(Endicott, NY)Software Developer in Java (J2EE) and Perl.- Promoted to technical lead assisting the project architect in designing and developing application.- Gathered business requirements from customer team.- Conducted use case design and code reviews.- Designed and developed Java framework for batch job processing environment as part of Government project.- Designed and developed client application for Micro electronics testing facility utilizing Java Swing.- Designed and tested client server based application for internal package tracking utilizing Perl CGI and Palm based hand held units.- Designed and developed regression test automation of end-to-end procurement system allowing requisition, purchase orders and invoices processing using web pages and SAP.- Developed scripts in TSL and Java to interact and automatically populate fields on web pages with externalized data.- Maintained JSP and Servlets applications.

(New York City, NY)IT Consultant assigned to Chase Manhattan Bank, N.A.System installations and troubleshooting hardware, software and network.

Villejuif, Île-De-France, Fr

(New York City, NY)End user support and installation of NT 4.0 Workstations on laptops.

Bs, Computer Engineering

Certificate, Japanese Intensive Immersion Language Summer Program

Baccalaureate In Science, Math, Physics, Chemistry