Mark D. Email & Phone Number

London, GB

England, United Kingdom

• leading engineering design and delivery of platform enhancements solving complex edge to enterprise zero trust challenges
• KeyScaler AI model rollout, code-signing and secure updates
• devised an adaptive policy engine, a partial implementation of a Markov Decision Process. Awarded UK Gov innovation credit
• design of identity bound OAuth access token protocol to the edge
• Spring Security, JCA, Azure IoT, KeyVault, AWS S3, X9.62, ECC, HSM, key agreements, various schemes, NIST, concurrency troubleshooting, performance optimization and constrained devices

London, England, United Kingdom

• remote device handler state machine for fleets of 1000s of ATMs. Key blocking, X9 TR 31-2018, X9 24-2 TR34. PKI, Interactive Financial eXchange real time messaging, JMS.
• real-time payments, authorization, routing, ISO8583, BASE24-eps integration
• Java, enhancements, development, integration testing, fixes, occasional engineering lead for deliveries up to $3M
• static scans, vulnerability mitigation, compliance, build pipeline improvements, delivery preparation.

London, England, United Kingdom

• C/C++ development, EFT transactions, authorization, routing, ATM, POS, ISO8583, PCI DSS
• product customisations, enhancements, uplifts, bank authorising host system integration, payment network integration; Visa, MasterCard, etc. Network mandates
• authoring impact assesements and high level designs
• various development projects for major financial institutions, occasional engineering lead
• engineering in accordance with architects, adherence to internal standards and frameworks.
• design collaboration for introduction of Visa Tokenization Services (VTS) for ApplePay, Google Pay into Europe

London, United Kingdom

• in partnership with PayPal engineering, created UK's first certified Java integration for Verified by Visa and MasterCard SecureCode (3DS)
• created an e-commerce SaaS platform (MVP) for small online retail merchants, integrating a limited number payment service providers (PSPs) and certifications
• full stack development, Struts2, Spring, jQuery, JSTL, Tomcat, Hibernate, MySQL, RHEL and CentOS
• operated all aspects of micro business including, customer facing, managing providers and commercial

London, United Kingdom

• L3 support and development of minor enhancements and fixes for billing system, iSDX PBX and DMS250 call data record (CDR) mediation, costing engine. billing invoice production. Visual Basic, Java and a little C..
• support of billing enquiry system. Windows, HPUX, Distributed Computing Environment and Oracle DB

City Of London

• development of enhancements and fixes for telco billing system.
• UK Government Telecoms Network. PBX and Nortel DMS250 call data record mediation. Visual Basic, Sybase, DBA, VMS, DCL.

City Of London

• development of process control software tools
• project planner for managed network service for UK Government Telecoms Network
• process controller for service provisioning and sales pipeline for complex voice solutions (VPN, PBX, Nortel DMS), supporting sales support engineers

• bulk authorization provisioning
• Oracle Forms enhancement requirements spec and UAT