• 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

• 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.

• 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 • C/C++ on AIX, NSK, Linux, HPUX, zOS. TACL, Enscribe, Oracle DB.

• 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

• 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. Sybase, DCL, VMS.• support of billing enquiry system. Windows, HPUX, Distributed Computing Environment and Oracle DB

• 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.

• 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