# Nicholas Guarino

> Staff Site Reliability Engineer at Careviso

Location: Reston, Virginia, United States
Profile: https://flows.cv/nicholasguarino

Motivated staff-level software engineer and devops/platform/site reliability engineer with a passion for problem solving. Extensive experience with both healthcare and enterprise B2B SaaS solutions for SMEs and consultancies working with major international brands. Enjoys working in collaborative, tightly knit teams with opportunities to teach and learn.

Proficient in multiple areas including modern JavaScript/TypeScript, Ruby on Rails, C and C++, Linux System Administration, AWS, Azure, Cloud FinOps and compliance best practices, DevOps/GitOps/CICD and Docker. Experience implementing compliance frameworks, including SOC 2, ISO 27001, and HIPAA. Able to quickly learn new languages and frameworks as project needs dictate.

## Work Experience
### Staff Site Reliability Engineer @ careviso
Jan 2024 – Present | Falls Church, Virginia, United States
- Led FinOps transformation by orchestrating cost optimization best practices across infrastructure, achieving measurable savings and improved resource utilization
- Managed critical incidents end-to-end, serving as incident commander for high-severity outages while implementing post-mortem processes to prevent recurrence
- Co-architected major data pipeline rebuild that reduced operational costs by over 80% through strategic re-design and optimization of data processing workflows
- Championed security initiatives by implementing application and infrastructure security best practices, strengthening overall system resilience and compliance posture
- Directed large-scale AWS migration from legacy environment, aligning architecture with AWS Well-Architected Framework (WAFR) principles for improved reliability and scalability
- Drove cross-functional project management for SRE team, successfully balancing business priorities with product engineering needs while ensuring timely delivery of critical initiatives
- Established SRE best practices including monitoring, alerting, and automation frameworks that improved system reliability and reduced operational toil

### Site Reliability Engineer @ careviso
Jan 2023 – Jan 2024 | Falls Church, Virginia, United States
- Implemented and designed team practices in tandem with CTO for newly formed Site Reliability team, including project coordination and management practices, provisioning of incident management tools and policies, and quarterly planning.
- Managed evidence collection and automation for yearly compliance audits, coordinated planning and implementation for ongoing security requirements for SOC2 and HIPAA, and automated security observability for company's product infrastructure.
- Implemented and managed observability for company products resulting in large improvements to application performance, global response times, number of incidents, and speed of incident resolution.
- Architected and contributed redesign of company infrastructure to line with AWS best practices and improve cost observability and optimization.
- Reduced company cloud spend by 20% month-over-month and kept costs low through optimization of infrastructure resources, automation of FinOps analysis and recommendations, and proactive monitoring.
- Implemented DevOps best practices around SDLC cycle, leading to a 50x improvement in time to release, a roughly 80% reduction in release-related incidents, and a reduction of MTTR for incidents by 2+ hours.

### Senior Software Engineer @ careviso
Jan 2020 – Jan 2023 | Falls Church, Virginia, United States
- Assisted in the development of an in-house, HIPAA-compliant software platform for processing patient and procedure data for providers using Ruby on Rails and React.
- Guided development of modern DevOps processes and internal guidelines, and made iterative improvements on infrastructure and platform for in-house software with heavy usage of AWS ECS, Lambda, S3, RDS, Elasticsearch/Opensearch, and similar.
- Maintained multiple integrations with third party services, including Salesforce, Tableau, Datadog, Box, and similar.
- Implemented best practice static code analysis with automated reporting for OWASP 10 issues.
- Handled infrastructure and software data collation and provided guidance for yearly SOC2 audit evidence.

### Senior Developer @ Vox Supply Partners
Jan 2017 – Jan 2020 | London, England, United Kingdom
Worked in a development role in a cross-functional team of 3 developers and one designer in development of fully custom SaaS solution that consists of:

- Custom Ruby on Rails API.
- Objective-C iOS application with fully custom Augmented Reality tool alongside drag and drop product configurator.
- Frontend customer facing React/Redux application.
- Administrative panel for SaaS solution using React/Redux and Formik.
- Native Android application replicating iOS apps functionality.
- End-to-end application infrastructure build using Kubernetes, Helm, Flux and Docker on AWS. Full integration with KIAM and best practice encryption.
- Regular OWASP Top 10 audits.
- CICD pipeline using GitLab for build and deploy of API, JS frontend applications and iOS applications (iOS integrated with Fastlane) into AWS Kubernetes cluster.

### Senior Developer | Founder @ Cadmia Ltd
Jan 2015 – Jan 2020 | London, United Kingdom
* Architected and scoped software and business solutions for SMEs.
* Applied software engineering skills to build custom solutions for clients.
* Managed projects ranging from months to several years in length.

### Senior Software Engineer @ Sysdoc
Jan 2019 – Jan 2020 | London, England, United Kingdom
- Assisted in the creation of an in-house SaaS application using React, MobX, and C# (.Net Core 3 WebAPI)
- Assisted in the creation of a contracted client solution using React and Redux on top of Sharepoint.

### Producer | Lead Developer @ Iron Realms Entertainment
Jan 2019 – Jan 2020
- Introduction, planning, and development of new features and promotions.
- Management of public relations with userbase.
- Ongoing maintenence of source code and infrastructure.
- Management of existing staff and hiring of new staff.

### iOS Developer @ Haste Ltd
Jan 2019 – Jan 2019 | London, England, United Kingdom
- Gathered complex technical requirements to replace 3rd party supplier app with fully custom iOS application for singular cost of half their original annual cost.
- Creation of fully dynamic, offline capable frontend for Salesforce as native iOS app using Swift - converting c. 250k records from JSON to SQLite for storage on initial sync.
- Established DevOps pipeline which automates builds, tests and deployments of iOS apps via GitLab and Fastlane.

### Senior Software Engineer @ Sysdoc
Jan 2018 – Jan 2019 | London, England, United Kingdom
Last mile delivery of TypeScript based HTML5 Phaser game which was deployed into major international client in oil and gas sector. Key elements of project included:

- Wrapping existing web application in Cordova to allow installation as native iOS and Android app.
- Implementing mobile vibrate APIs using Cordova.
- Implementing SAML authentication flow into Cordova to handle Azure AD login.
- Overseeing and sourcing developers to implement SAML service provider into apps C# backend.
- Increased game performance via optimisations to achieve consistent 60FPS on target mobile devices.

### Assistant Producer | Lead Developer @ Iron Realms Entertainment
Jan 2017 – Jan 2018
- Introduction, planning, and development of new features and promotions.
- Management of public relations with userbase.
- Ongoing maintenance of source code and infrastructure.

### Senior Software Engineer @ Sysdoc
Jan 2018 – Jan 2018 | London, England, United Kingdom
Worked in a small team in the creation of an Integrated Management System (IMS) platform built on top of Sharepoint using React & MobX. Delivered project on-time and on-budget in very tight 10 week window.

### Full Stack Engineer @ Phoebus Associates Ltd
Jan 2015 – Jan 2017 | London, England Metropolitan Area
Delivered multiple projects as full stack developer for small digital agency based in London. Work was delivered with variety of tools including React, Redux, Ruby on Rails, Wordpress, Sass, Webpack, Grunt and Gulp.

Notable projects included:


- Delivery of bespoke CMS using Ruby on Rails for an oil and gas exploration company.
- Delivery of bespoke CMS using Ruby on Rails with React for major London insurance company.
- Delivery of fully custom document management and information sharing platform for large London law firm using Ruby on Rails.


## Contact & Social
- LinkedIn: https://linkedin.com/in/ndguarino

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Source: https://flows.cv/nicholasguarino
JSON Resume: https://flows.cv/nicholasguarino/resume.json
Last updated: 2026-03-22