David De La Harpe Golden

Last Update: 2022-02-16

Next availability: Mar 2022. Primarily interested in server/systems programming or devops contract roles in the 6-18 month range in Ireland. Based in Dublin, open to remote work.

Backend and frontend enhancements to internal-facing global market risk data ETL, API provision, and reporting systems.

Key technologies: Python, DB2 SQL RDBMS, distributed object database, Javascript, OpenFin, React

In light of 2020 pandemic, took year out to work primarily on personal and minor freelance projects.

Sep 2018 - Sep 2019: Programmer (Contract), client: Bank of America Merrill Lynch

Enhancements to distributed and highly available FX post-trade system and supporting infrastructure, improvements to CI/CD processes, and internal-facing data reporting projects.

Key technologies: Java, Spring WebFlux, Swagger, Postman, Cloudera, Python, Airflow, Jenkins CI, Ansible, Linux

Jan-Feb 2017, Apr-Oct 2017: Programmer (Contract), client: Houses of the Oireachtas

ETL development for ongoing web project. Adaptation for concurrent execution, and coarse-grained parallelization of, ETL processes by time-partitioning and directed acyclic graph based workflow design. Time-interval based data integration of several document database sources into reporting database and onward via bulk load to Elasticsearch, for presentation via public RESTful API. Mongodb to Postgresql data stack migration. Architectural reviews for in-house implementation and eventual cloud migration. Parameterized clustered linux systems deployment. Mentoring of student junior developer on CRUD data maintenance web app summer project.

Key technologies: Airflow, Celery, Python 3, SQLAlchemy, Alembic, Ansible, Elasticsearch, PostgreSQL with btree_gist, Mongodb, Flask, RHEL, Linux

On a team developing model-based automated configuration management (orchestration) utility for linux-based HA clusters, used to support instances of a largely java-based telecoms network management solution, including work on parallelization of the utility's deployment and upgrade functions. Diagnosis and resolution of various defects in existing codebase, such as memory and concurrency issues including deadlock diagnosis and prevention in existing multithreaded code.

Key technologies: Python, Cherrypy, Celery, SQLAlchemy, Alembic, PostgreSQL, Puppet, Maven, Jenkins CI, Gdb, Valgrind Helgrind, RHEL, Linux

Financial trading systems development and systems integration. Product-based planning, issue management. Server-side clustered async Java programming with various industry-specific APIs and protocols, with secure frontend webapp with reactive js/html5 UI. Python glue code and devops tasks.

Key technologies: DB2, Java, RxJava, Vert.x (distributed actors), Hazelcast (in-memory data grid), WebSockets, jsse crypto/security, Datatables, Jython, CPython, JUnit, Ansible, Maven QuickFIX, QuickFIX/J, Linux

Financial systems and network administration. High availability linux clustering. Systems and services virtualization. Second-site (Dublin/London) backup and disaster-recovery architecture and deployment. In-house CA infrastructure. Replicated directory services integration. Development work on FIX protocol bridge to legacy financial software.

Development of a web interface for researchers using HPC systems, and misc. HPC systems administration and staff and end-user support as-needed.

Worked on a range of software projects and volunteer feature enhancements for open source projects.

Managed batch-processing linux clusters in DIAS (32 cores) and UCD (256 cores), used by researchers in astrophysics, geophysics and meteorology. The clusters were connected into the wider Irish (Grid-Ireland) and European (EGEE) computing Grid.

On team offering services primarily within internal market of the ESB. Training in management consultancy and business process analysis, working on projects such as resolution of IT issues associated with business separation into state-regulated and unregulated units and a management information system for an eastern european environmental agency.

Java development for small startup working on web-based interaction with financial live data feeds

Developed a "secure extranet" java application for controlled web-based access to mainframe-stored privileged information across organizational borders for the assessment of social benefit claims.

Group project consisted of the design, construction, and racing of a four-wheeled human powered vehicle, and individual project consisted of simulation of an aerodynamic bodyshell for the vehicle.

Technical management for social events with attendances of 500-600 people at a Manchester University student hall of residence.

Subjects studied included: Industrial management and economics, Impact engineering, Computational fluid dynamics and solid mechanics, Thermodynamics, Mathematics, Automatic control, Electrical engineering, Dimensional analysis, Information technology, Computing, Materials, Manufacturing technology (and more...)