David De La Harpe Golden

Last Update: 2021-04-15


+353 86 307 2318 (mobile)

david@harpegolden.net

https://harpegolden.net/


Next availability: Oct 2021. Primarily interested in server/systems programming or devops contract roles in the 6-18 month range in Ireland. Based in Dublin but open to remote work.


2021: Programmer (Contract), client: TBA (financial sector)


Providing contract programming service.


2020: Freelance and Personal Projects


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


Worked as a member of the FX Core Data Infrastructure team on enhancements to a distributed and highly available 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


2015-2016: Programmer, Ammeon Limited


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


2014-2015: Systems Programmer, Squared Financial Services Limited


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


2012-2013: Systems Administrator, Squared Financial Services Limited


Security and reliability conscious financial systems and network administration. High availability (HA) linux clustering. Systems/services virtualization. Second-site (Dublin/London) backup/disaster-recovery architecture and deployment. In-house CA infrastructure. Replicated directory services integration.

Development work on FIX protocol bridge to legacy financial software.

2009-2011: Systems Programmer, Irish Centre for High End Computing


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


2007-2008: Freelance IT / R&D (self-employed)


Worked on a range of software projects, such as a lisp web application servers deployed to VPS, Desktop-oriented multi-core programming and minor feature enhancements for GNU Emacs (volunteer).


2004-2007: Cluster Manager with Cosmogrid Consortium, DIAS, Ireland


Managed batch-processing linux clusters in DIAS (32 cores) and UCD (256 cores), used by researchers in astrophysics, geophysics and meteorology, including linux cluster systems administration, researcher support, user training and R&D. The clusters were connected into the wider Irish (Grid-Ireland) and European (EGEE) computing Grid.


2002-2003: IT Consultant with ESBI Computing, Dublin, Ireland


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.


2001: Programmer with "Javocado", Stanstead, England


Java development for small startup working on web-based spreadsheet-like "power-user" interactions with live data feeds such as those encountered in stock trading.


2000-2001: Programmer/Analyst in the ESB, Dublin, Ireland


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.


1999: Final year group and individual engineering design projects


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.


1997-1999: Socials technician at Hulme Hall


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


EDUCATION


1996-2000: MEng. Hons. Mechanical Engineering (2:2), UMIST, England


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...)


1990-1996: The King's Hospital, Palmerstown, Dublin 20, Ireland


Irish Leaving Certificate 1996 5 A, 2 B, 1 C, all at higher level.

Irish Junior Certificate 1993: 6 A, 3 B, all at higher level.

Speech and Drama training: Honours (82%) at R.I.A.M. Grade 8

Participated in both French and German language exchange programmes.


REFEREE CONTACT DETAILS AVAILABLE UPON REQUEST