AWS Developer David Leo

David Leo

Mid-level AWS Developer
7 years experience

£15 - £25/hour

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David Leo is an IT professional with comprehensive technical skills and expertise in infrastructure process improvement, work flow design, and leadership and vendor relationship. He has experience with AWS infrastructure planning and deployment, especially for small businesses and startups. 

He is a motivated achiever, a proficient problem-solver, and an energetic team player; on top of this, he pays attention to detail and places high importance in the quality of his work.

Work Experience

Senior Server Engineer (AWS)
September 2018 - Present


  • Build and maintain the right cloud infrastructure architecture, balancing performance and resilience with cost.
  • Work on developing, integrating, and deploying new and existing security cloud technologies such as alerts, sensors, and tools.
  • Understand and contribute to standards across the organisation and ensure the company is fully compliant to those standards and policies. Identify and troubleshoot recurring platform issues.
  • Architect, build, and operate highly available, fault-tolerant, scalable, and secure systems.
  • Work on the design of application components that are standards-based, highly performant, and compliant with organisational standards and procedures.
  • Participate in planning, implementation, and growth of customer’s Amazon Web Services (AWS) and Vultr foundational footprint.
  • Function as team leader with responsibility to set direction on technologies, processes, and procedures within the team.
  • Lead efforts to develop standard practices, components, guidelines for use of complex technology components.
  • Technologies: Amazon Web Services(AWS), Python, Git Bash, AWS CloudFormation, Vultr, Linux
System Administrator
June 2016 - August 2018


  • Managed the day-to-day operations of the MYNT|GXI|FUSE host computers by monitoring system performance, configuration, maintenance and repair.
  • Ensured that records of system downtime and equipment inventory are properly maintained.
  • Applied revisions to host system firmware and software.
  • Developed new system and application implementation plans, custom scripts and testing procedures to ensure operational reliability.
  • Established, maintained, and managed users' Unix accounts. Installed, modified, and maintained systems and utility software on server computer systems.
  • Provided server support related to other software.
  • Developed procedures, programs, and documentation for backup and restoration of host operating systems and host-based applications.
  • Developed and coordinated project directions and schedules to maximise benefits and minimise impacts on the customer organisations.
  • Provided leadership in planning and implementation of projects for computer operations and enterprise system administration.
  • Stayed current with technological developments in systems administration technology and recommends ways for MYNT| GXI|FUSE to take advantage of new technology. 
  • Technologies: Amazon Web Services
System Adminsitrator
January 2015 - June 2016


  • Installed new and rebuilt existing servers and configure hardware, peripherals, services, settings, directories, storage, etc. in accordance with the standards
  • Researched and recommended innovations and wherever possible; automated approaches that leverage resources and provide economies of scale
  • Performed daily system monitoring verifying the integrity and availability of all hardware, server resources, systems and key processes
  • Performed daily backup operations, ensuring all required file systems and system data are successfully backed up to the appropriate media, recovery tapes or disks
  • Provided Tier III from various constituencies. Investigated and troubleshooted issues
  • Applied OS patches and upgrades on a regular basis and upgrade administrative tools and utilities. Configured/Added new services as necessary
  • Performed ongoing performance tuning, hardware upgrades and resource optimisation as required. Configured CPU, memory and disks partitions as required. 
  • Technologies: Amazon Web Services(AWS), AWS CloudFormation, Windows, Linux Environment, Python, Git Bash, Ansible, DevOps
Network and Telecommunications Officer
February 2013 - December 2014


  • Supported, maintained, and documented all LAN/WAN-related processes such as data and voice networks, troubleshooting; installing, upgrading and configuring network (printers/appliances, directory structures, user rights, security software, remote connections, and file sharing services).
  • Handled server, PC and peripherals such as analysing server OS software and application system problems; undertook system administration; maintained and managed software licenses, data back up, and restoration.
  • Managed voice and digital lines i.e. cabling, terminating and PABX programming of telephones and peripherals and evaluating, troubleshooting, planning and recommending changes and upgrades to PABX systems.
  • Administered internet connection and configuration to client computers and recommended solutions to related concerns (e.g. mail rejections, spam, denial of service attacks, viruses, hacking attempts) and blocking of sites and malicious contents that cause internet traffic.
  • Documented service requests received and attended, changes applied to the network system and timely submission of reports to super visor/manager.
  • Performed other duties and responsibilities that may be required and/or assigned by management from time to time.

Bachelor of Science in Information Technology
Polytechnic University of the Philippines
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