David O'Sullivan Email & Phone Number

Derby, Gb

London, Gb

Utilising Microservices, APIs, Cloud hosting and Headless, Java/Spring deployed on GCP and AWS

London, Gb

Providing IT consulting services to help global brands modernise and drive change efficiently

Watford, Hertfordshire, Gb

- Empowered Wickes Engineering and Support Teams as a subject matter expert, providing vital knowledge and guidance.- Provided C-level executives deep insight into process concerns allowing more informed decision-making.- Established and communicated best practice guidance on Architecture, Engineering, Service Delivery, Estate Monitoring, Performance Monitoring, and Code Reviews, enabling the business to drive continuous improvement including initiating a development portal

Watford, Hertfordshire, Gb

- Improved cross functional working within eCommerce, POS, CRM, PIM, Finance, OMS, WMS.- Transformed monolithic applications and Java services into native cloud (AWS) implementations, reducing complexity and eradicating downtime.- Converting unstable batch processing into high-performance, low-latency, and resilient solutions with high data throughput, data mapping and data integrity.- Delivered robust and scalable AWS solutions that improved the platform's overall performance.- Utilised the serverless framework within a CI/CD pipeline for continuous delivery and improved time to market.- Collaborated with multiple teams and stakeholders in Scrum, Kanban and Waterfall projects.- Streamlined business processes and reduced costs.- Coached and guided tech leads and scrum masters.- Working predominantly with AWS Lambda, Step-Functions, S3, SNS, SQS, Cloudfront, Cloudwatch, IAM, Security Groups, API Gateway, DynamoDB, RDS, Aurora, Datadog, Serverless, Cloudcraft, GCP.

Theale, Reading, Berkshire, Gb

- Working closely with the UK & US business, offshore development teams and onsite domain specialists to help bring a large-scale system migration to completion, expediting fixes to critical path issues.- Improving the project standards and delivery pipeline for development and testing.PCI compliance review.- Zero downtime user password encryption and salting upgrade.- Designing solutions for key business requirements and new features.- Mentoring junior architects, business analysts and developers.- Producing a roadmap for the future technology stack.- Positioning the business to start utilising an API first approach.

München, Bayern, De

- Project status analysis with tactical and strategic guidance.- Governance and oversight to provide the steering committee with a clearer understanding of progress.- Refined processes and delivery frameworks.- Corrected the trajectory of the project, providing leadership and vision to the team.

Billund, Dk

- ATG and PayPal Integration.- Providing a contact between onsite senior leadership and offshore development teams.- Collaborated closely with the Head of Engineering, maintaining consistent updates on project status.

Austin, Texas, Us

- Review of perceived performance issues, providing insight into the working of ATG Search.- Documented the current process and provided recommendations for improvement.- Advised senior leadership on the future technology roadmap.

Austin, Texas, Us

- Cloud digital storage and retrieval platform.- Support, mentor and guide a leading Systems Integrator’s development team.- Working with Canon’s programme lead and SI’s development team to align architecture, development practices.- Reporting and expectation management.

London, Gb

- Lead architect on a multi-tenant, multi-region eCommerce offering.- Responsible for leading architectural governance across multiple operating companies.- Responsible for reviewing and guiding multiple-vendors across OpCos.- Developing the strategic multi-OpCo roadmap to align technology and business verticals.

London, Gb

- Responsible for identifying and resolving key performance and stability issues within the bespoke platform.- Performance best practices, analysis and stabilisation for a major product release.- Provided insight into the logical architecture of ATG.- Managing critical timelines.- Working with Business and Technical teams initiating pragmatic and methodical reviews of each release/issue.

Austin, Texas, Us

- Lead Architect for Vodafone UK’s ATG online shop.- End-to-end design for PCI-DSS.- Working with development, Business Management, Head of Department and CITO.- Guiding the HP onshore and offshore development teams in ATG best practice. - Responsible for resolving critical live site issues and resolving process and performance issues. - Worked both with the technical teams and the business to ensure the successful delivery of an integration for the ATG platform and a bespoke backend and in-house order management systems.

Cambridge, Ma, Us

David was a key member of the ATG Professional Services Team providing both onsite and offsite digital leadership tor the Tesco Direct Migration project. David provided best practice advice and design principles across multiple streams of this fast moving, challenging project. Responsible for designing and developing custom ATG Customer service centre (CSC) and bespoke Commerce modules and components to support the Tesco Customer Service Centre and online Tesco direct website.

Cambridge, Ma, Us

David provided a fit-gap analysis between the clients existing Customer service Centre and ATG Commerce Service Centre. David enabled the client to understand the available functionality, how it differed from their existing system and provided best practice advice on implementing and extending CSC.

Cambridge, Ma, Us

London, England, Gb

David worked on many client and internal projects as an ATG architect and Technical consultant.

London, England, Gb

David was responsible for the architectural governance of the ATG platform, providing high level and solutions designs, reviewing designs from multiple vendors, supporting code improvements and design integrity. David also worked closely with the Business unit to improve the delivery processes and quality of deliverables.Working on RFPs and RFIs

London, England, Gb

David was responsible for the initial setup and business process management of the clients global ATG Intranet solution and support services as a Centre of Excellence. David’s experience includes managing the relationship between suppliers and customers in various projects, working closely with the client facilitating workshops with key business users and ensuring the client’s needs are met. David was involved heavily in the business analysis and selection of the best approach that fulfilled the clients strategic vision and enabled the smooth transition of support services.

London, England, Gb

David provided Architectural Guidance and best practice expertise to ensure the successful launch of Vodafone Germany’s online Shop re-platforming to ATG 2006.3. His roles including working with Vodafone’s Lead Architects, Business Analysts and ATG Professional Services to support a Telco based product Catalog, advising on best practices for a team of consultants whilst adhering to a bespoke business process model.

London, England, Gb

As part of a system audit on a recently migrated Web Store, David was tasked with identifying improvements to process, code quality, application and physical architecture. David further worked with the business team to prioritise, triage the improvements to ensure appropriate delivery.

London, Gb

Developer in Core Team setting up the re-branded Royal Mail, Parcelforce Worldwide and Post Office websites. This utilised ATG 6 Portal framework, Portal configuration via Portal Administration Tool, ACC, SQL via an Oracle 9i Database, ATG Page and Layout Templates, JSP page development and Gear configuration. During the last two months I also supported the content task force and design teams.