Chris Green, Developer in Cleveland, OH, United States
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Chris Green

Verified Expert  in Engineering

Full-stack Developer

Location
Cleveland, OH, United States
Toptal Member Since
June 7, 2018

Chris is a highly motivated and resourceful IT leader and engineer with 23 years of high-impact experience in software and architecture design and leading development teams. He is a strong communicator, recognizing signs of failure and taking appropriate action to remedy it. Chris can seamlessly transition between various roles, from writing software to managing large-scale initiatives without friction, while adopting a strategic perspective based on your needs.

Portfolio

AMN Healthcare
Active Server Pages (ASP), C#, SQL, Windows Forms (WinForms), VBScript, Azure...
Anthem AI
Amazon Web Services (AWS), Amazon Simple Queue Service (SQS), IBM Watson...
Rhithm
Business Strategy, Startup Consulting, Architecture, .NET, GitHub, REST APIs...

Experience

Availability

Full-time

Preferred Environment

C#, SQL, TypeScript, Vue, Amazon Web Services (AWS), Azure, Agile, MongoDB, Single Sign-on (SSO), OAuth 2, .NET, Cloud, Data Architecture, Data Engineering, APIs, Data, Databases, Serverless, Solution Design

The most amazing...

...software I've built is a force-amplifying workflow tool that leveraged Azure OpenAI to partially complete tasks before they were assigned to a real person.

Work Experience

Developer | Development Manager

2021 - 2023
AMN Healthcare
  • Cleaned up a troublesome 20-year-old software suite consisting of two Classic ASP applications and five .NET 2.0 WinForms applications to bring reliability and resiliency to the business-critical software.
  • Built a new software suite in .NET 6 with Azure Serverless with an Angular SPA front end to replace a troublesome legacy software suite while maintaining that legacy software.
  • Made integrations with Datadog for performance analysis, as well as LogRocket for recording user sessions and conducting A/B testing. Used GraphQL and Swagger UI for our APIs.
  • Made integrations with 3rd-party web services for address verification, commute times, flight data, hotel data, and more.
  • Implemented Azure Enterprise Service Bus (ESB) that seamlessly integrates various systems across the operational division.
  • Established processes and tooling around legacy systems, enabling the business to reliably make updates and respond to outages.
  • Incorporated architecture changes into a new system, reducing the business's dependency on software development and enabling new clients and jobs to be executed without the need to code custom logic, thereby removing a bottleneck.
  • Instituted the Scrum process for a new team, scaling it up from three developers to a robust team comprising seven developers, two QA engineers, an architect, and a scrum master.
  • Established a QA operation initially with manual feature and regression testing, then implemented Selenium to automate regression testing with coverage growing broad first, then deep.
Technologies: Active Server Pages (ASP), C#, SQL, Windows Forms (WinForms), VBScript, Azure, Enterprise Service Bus (ESB), .NET, Angular, Azure DevOps, Azure Pipelines, WebSockets, Full-stack, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, .NET Core, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, Project Management, IT Project Management, Agile Product Management, Technical Project Management, API Integration, CTO, Technical Leadership, Solution Design, Containers

Director of Rapid App Development and Architecture

2020 - 2021
Anthem AI
  • Delivered an AI pilot project for the HealthOS ecosystem proving the project's technical viability.
  • Established a cross-functional data-driven process incorporating expertise from multiple disciplines in an additive way, using data as the common language.
  • Operationalized collaboration between ML experts, data scientists, and content experts to optimize the performance of ML models, improve NLP conversational quality, and increase productivity among team members.
  • Put practices in place to tie engineering efforts back to business goals and objectives, increase the amount of value-adding work being done, and reduce waste across my teams.
  • Provided management and technical oversight of architecture, machine learning, DevOps, cloud infrastructure, data science, product development, QA, full-stack development, and post-production support.
  • Architected and designed pivotal systems within the HealthOS ecosystem and parts of the HealthOS platform itself.
  • Integrated with IBM Watson, Elasticsearch, TensorFlow, Swagger, GraphQL, Okta SSO, Jira API, CSV and PDF scraping, and more.
Technologies: Amazon Web Services (AWS), Amazon Simple Queue Service (SQS), IBM Watson, Python, React, Elasticsearch, Business Strategy, Architecture, Redux, Webpack, Kubernetes, PostgreSQL, Redis, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, .NET Core, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, ETL, Databases, Data Scraping, Web Scraping, Integration, Project Management, IT Project Management, Agile Product Management, Technical Project Management, AWS Lambda, Serverless, Amazon DynamoDB, Amazon CloudWatch, Amazon Cognito, Jira, API Integration, Natural Language Processing (NLP), CTO, Technical Leadership, Solution Design, Containers, Amazon Elastic Container Service (Amazon ECS)

Advisor | Architect | Manager

2019 - 2021
Rhithm
  • Provided guidance on stabilizing the platform and making data the focus for the business's efforts to acquire investors. Also provided leadership to ensure the technical team stayed on track to deliver on the business's evolving strategic and tactical needs.
  • Rearchitected data flows, persistent storage, reporting, and other data access operations that were becoming slow and unreliable.
  • Reduced the size of the development team by half, increased development productivity, and reduced quality issues caused by poor collaboration between departments and lack of a disciplined process, achieving all of this within just one month.
  • Handled hands-on integrations of various internal and external APIs for the purpose of optimizing the product's value proposition and delivering the strategic advantage the business requested.
Technologies: Business Strategy, Startup Consulting, Architecture, .NET, GitHub, REST APIs, ASP.NET, Cloud, CTO, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, Project Management, IT Project Management, Agile Product Management, Technical Project Management, AWS Lambda, Serverless, Amazon CloudWatch, Amazon Cognito, Jira, API Integration, Technical Leadership, Solution Design

Technical Evangelist

2018 - 2021
Okta
  • Implemented integrations with many of Okta's authentication services, including oAuth2, OIDC, two-factor authorization, SSO, etc.
  • Developed example apps to demonstrate the use of particular technologies while building secure applications. Wrote blog articles explaining how to use those technologies to accomplish common development tasks.
  • Implemented integrations with various popular APIs to illustrate examples of Okta's services in use, including Twilio API, Microsoft's Calendar Graph API, Jira API, Salesforce API, etc.
  • Illustrated examples using technologies like AWS, Azure, C#, MongoDB, SQL Server, and Vue.
Technologies: Amazon Web Services (AWS), Azure Cosmos DB, MySQL, Outlook, Google Calendar API, Microservices, Okta, Twilio, Azure, DocumentDB, C#, Architecture, .NET, Full-stack, SaaS, GitHub, REST APIs, CSS3, ASP.NET, Cloud, APIs, Data, Databases, Integration, AWS Lambda, Serverless, Amazon CloudWatch, Amazon Cognito, Jira, API Integration, Technical Leadership, Solution Design

Architect | .NET Engineer

2019 - 2019
Blacc Spot Media
  • Engineered a custom text messaging application that helped customers identify which windshield wiper they needed to purchase.
  • Architected a full solution optimized for system response time involving Twilio text messaging APIs, data flows, Azure Functions, and CI/CD pipelines.
  • Built environments and pipelines, establishing CI/CD processes for development, quality assurance (QA), staging, and production environments.
  • Made integrations with Twilio API, webhooks, and Dynatrace.
Technologies: Twilio, Microsoft SQL Server, DevOps, GitLab CI/CD, Azure, Windows Azure SDK, C#, Architecture, .NET, Full-stack, GitHub, Networks, CI/CD Pipelines, REST APIs, Front-end, ASP.NET, Cloud, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, Project Management, IT Project Management, Unit Testing, Agile Product Management, Technical Project Management, AWS Lambda, API Integration, Technical Leadership, Solution Design

Solutions Architect

2018 - 2019
Inception Websites
  • Architected a custom email marketing system similar in functionality to Mailchimp but tailored for dentists.
  • Designed tolerations to support massive parallelization of SMTP operations, conducted experiments to optimize primarily for cost, logically prioritizing time-sensitive materials to get them delivered on time. Ultimately using AWS Lambda based on the result.
  • Designed an SOA, leveraging a REST API, a SPA to administer the software suite, and a SPA for users to manage and execute email marketing campaigns. It creates work for the automation system and gives feedback and stats to know everything is working.
  • Integrated with Splunk, GraphQL, LogRocket, and Twilio API.
Technologies: Amazon Web Services (AWS), DevOps, Microsoft SQL Server, SendGrid, Less, CSS, TypeScript, Vue, C#, Architecture, HTML, .NET, Full-stack, SaaS, GitHub, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, Content Management Systems (CMS), Data Engineering, APIs, Data, Databases, Integration, Project Management, IT Project Management, Unit Testing, Agile Product Management, Technical Project Management, Serverless, API Integration, Technical Leadership, Solution Design

Architect and Lead Developer

2018 - 2019
Upliftr Messaging
  • Started as lead UX developer and advanced to team lead and architect.
  • Coached other team members on process improvement, task completion, and technical challenges.
  • Created a custom UI component out of a <div> that worked like email addresses in an email's "to" field.
Technologies: Bootstrap, TypeScript, JavaScript, Vue, Business Strategy, Startup Consulting, Architecture, Full-stack, SaaS, GitHub, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, AWS Lambda, Serverless, Jira, API Integration, Technical Leadership, Solution Design, Containers

Lead Developer

2018 - 2018
Sensentia
  • Developed software that extracted data from hundreds of thousands of PDF documents about insurance plans, then organized the extracted data to provide reports to business owners.
  • Built .NET C# background services to run scraping jobs.
  • Extracted data from PDFs, transformed in compliance with the client's data model, and loaded into the client's persistent storage.
Technologies: PDF Scraping, C#, Architecture, Full-stack, GitHub, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, ETL, Databases, Data Scraping, Web Scraping, Integration, AWS Lambda, API Integration, Technical Leadership, Solution Design

Lead UX Developer

2018 - 2018
Synergized SARL
  • Served as the lead UX developer responsible for creating a first-class Vue.js web application.
Technologies: Node.js, Sass, GraphQL, Docker, JavaScript, Vue, HTML, Full-stack, GitHub, Networks, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, APIs, Data, ETL, Databases, API Integration, Technical Leadership, Solution Design

Developer Consultant

2017 - 2018
Intellicorp Records (Enterprise Client)
  • Integrated near real-time virus scanning into a serverless Lambda on the AWS platform (according to our partner at AWS working on the technology), leveraging S3, SMS, and SQS to do so.
  • Implemented integrations for the CyberSource silent order post-payment gateway, DocuSign electronic document signing (via a web portal and email), the creation of leads in Salesforce, and Kentico headless CMS.
  • Drove the process improvement efforts associated with the development the team's agile transformation.
  • Designed and built software and database schema to automate client registrations.
Technologies: Single-page Applications (SPA), HTML5, Kentico, Salesforce, CyberSource, DocuSign, Bootstrap, Vue, .NET, C#, Node.js, Amazon Web Services (AWS), Architecture, HTML, Full-stack, Networks, REST APIs, CSS3, Front-end, ASP.NET, Cloud, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, AWS Lambda, Serverless, API Integration, Technical Leadership, Solution Design, Containers

Issue Response Team Lead

2016 - 2017
AXS (Enterprise Client)
  • Made integrations with multiple payment gateways, on-premise ticketing systems, headless CMSs, multiple software performance analytics platforms (to accommodate software running in different languages and OSs), internal company APIs, Atlassian APIs, etc.
  • Acted as the last line of support for the company's production bugs in a nearly 1 billion dollar-a-year business.
  • Built a new team that supported high-priority production issues with scope over the company's full product line. Established workflows for reporting, intake, execution of work, applying resolutions, quality assurance, and technical documentation.
  • Provided technical expertise and insights to direct troubleshooting efforts and solution development.
  • Applied Angular expertise to troubleshoot and solve complex UX problems in a handful of Angular websites.
Technologies: Single-page Applications (SPA), Microsoft SQL Server, Oracle, JavaScript, C#, Architecture, HTML, .NET, Full-stack, SaaS, GitHub, Networks, CI/CD Pipelines, REST APIs, CSS3, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, Data Architecture, APIs, Data, Databases, Integration, Project Management, IT Project Management, Unit Testing, Agile Product Management, Technical Project Management, Jira, API Integration, Technical Leadership, Solution Design, Containers

Architect | Engineering Lead

2015 - 2016
University Hospitals (Enterprise Client)
  • Implemented a Scrum development process with one-week iterations.
  • Provided UI expertise with Angular and React to troubleshoot existing UI problems and build new user-friendly forms—revamping the user experience.
  • Reduced the size of the data access layer by 50%.
  • Consolidated multiple BL class libraries into a single reusable library.
  • Introduced automated E2E testing to facilitate regression testing for each push to QA.
  • Provided UX development with Angular and React as well as HTML5 and CSS.
  • Increased productivity by 60.9% in six weeks and by over 100% in eight weeks.
Technologies: React, Angular, HTML5, Service-oriented Architecture (SOA), Microsoft SQL Server, Model View Controller (MVC), C#, TFS, Architecture, HTML, Redux, Webpack, .NET, Full-stack, Networks, CI/CD Pipelines, REST APIs, Responsive Web Design (RWD), Front-end, ASP.NET, Cloud, Solution Architecture, Headless Software, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, API Integration, Technical Leadership, Solution Design, Containers

Architect | Senior Process Control Engineer

2014 - 2015
Timken Steel
  • Architected a communications layer between the L2 and L3 systems, providing the centralized component through which all L3 systems understood the state of machines on the line.
  • Ensured all L3 systems had the same understanding of the state of machinery on the line and that updates to these states were available right away, utilizing an in-memory distributed cache.
  • Built a new L2/L3 communication service and client wrapper that handled all the communication to and from PLCs, using two-way RPCs over TCP/IP sockets with sub-millisecond read times.
  • Interacted with machine operators to troubleshoot problems and develop new features.
Technologies: Visual SourceSafe, Kepware Server (PLC Integration), Microsoft SQL Server, C#, Architecture, .NET, Networks, REST APIs, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, Databases, Integration, Firmware, API Integration, Solution Design

Developer Consultant

2013 - 2013
Parts Source (Enterprise Client)
  • Executed a test-driven approach that provided 100% code coverage with unit tests.
  • Built new features into a WCF web application.
  • Expanded the SOA with JSON web services.
  • Implemented interactive user experiences with JavaScript, jQuery, and CSS.
Technologies: Model View Controller (MVC), Service-oriented Architecture (SOA), Test-driven Development (TDD), Azure Active Directory, JSON, Windows Communication Foundation (WCF), jQuery, JavaScript, Flyway, Subversion (SVN), Unity, NUnit, PL/SQL, IBM Db2, C#, HTML, .NET, Full-stack, REST APIs, Front-end, ASP.NET, Cloud, Headless Software, APIs, Data, Databases, Integration, API Integration, Solution Design

Developer Consultant

2012 - 2013
Vitamix (Enterprise Client)
  • Resolved source control conflicts going back several years in TFS and implemented a feature and bug branching strategy.
  • Worked with internal customers to enhance and maintain the Sitecore and Znode CMS that drove a public-facing website.
Technologies: Azure Active Directory, JSON, REST, SOAP, TNet Strings, jQuery, CSS, JavaScript, ZNode, Sitecore, MySQL, PHP, TFS, Microsoft SQL Server, C#, Architecture, HTML, .NET, Full-stack, Networks, Front-end, ASP.NET, Content Management Systems (CMS), Data, Databases, Integration, API Integration, Solution Design

Developer Consultant

2011 - 2012
Safeguard Properties (Enterprise Client)
  • Designed and developed an enterprise-wide service bus built in .NET.
  • Implemented a NoSQL layer between persistent data storage and the DAL and supported more than a dozen different programming languages running on three different operating systems.
  • Worked with internal customers to maintain a C# web forms application—a work order system distributing work to thousands of contracted companies across the US and surrounding regions.
Technologies: Service-oriented Architecture (SOA), Titanium, Aurigma, JavaScript, jQuery, Subversion (SVN), Git, TFS, Visual Basic, TNet Strings, SOAP, JSON, Couchbase, Memcached, Oracle, Microsoft SQL Server, C#, Architecture, HTML, .NET, Full-stack, Networks, REST APIs, Front-end, ASP.NET, Cloud, Solution Architecture, Headless Software, Content Management Systems (CMS), Data Architecture, Data Engineering, APIs, Data, Databases, Integration, API Integration, Solution Design

President

2008 - 2012
Software Assassin
  • Managed projects and customer relationships.
  • Developed the full-stack for client demos; this was done every two weeks. Generally using XHTML, JavaScript, CSS, C#, T-SQL, and SQL Server.
  • Networked and consulted with clients; also searched for potential clients.
  • Managed the facility and finances.
Technologies: Service-oriented Architecture (SOA), JavaScript, TFS, Azure, NoSQL, SQL, C#, Business Strategy, Startup Consulting, Architecture, .NET, Networks, REST APIs, Responsive Web Design (RWD), Front-end, ASP.NET, CTO, Solution Architecture, Data Architecture, Data Engineering, APIs, Data, ETL, Databases, Integration, API Integration, Solution Design

Software Engineer

2000 - 2008
Coactive Systems, Inc.
  • Developed the full-stack with XHTML, JavaScript, CSS, C#, T-SQL, and SQL Server.
  • Created relational database designs.
  • Managed the project and led a team of three.
  • Worked on DOM scripting (before jQuery).
  • Worked on a project in vanilla JavaScript that was similar to a Microsoft product called Formula Writer. It was a textbox that you could type mathematical formulas into. It was basically an easy way to input math equations without having to learn MathML.
  • Created a JavaScript utility that synchronized the browser DOM with another browser's DOM that was linked to it. The synchronization was two-way, so if one of the users was typing text into a form, the other user would see that text in their browser as it was typed in.
Technologies: TFS, Scripting, DOM, XHTML, CSS, JavaScript, Microsoft SQL Server, .NET, C#, Architecture, Full-stack, Networks, REST APIs, Responsive Web Design (RWD), Front-end, ASP.NET, Solution Architecture, Content Management Systems (CMS), Data Architecture, Data Engineering, APIs, Data, ETL, Databases, Data Scraping, Web Scraping, Integration, API Integration, Solution Design

University Hospitals Telemedicine

http://www.uhhospitals.org/secondopinion
This is a telemedicine project that connects university hospitals to patients remotely by offering consultation services to provide a second opinion for medical diagnoses.

Vitamix Hybrid CMS Website

https://www.vitamix.com/
This site delivers content via a hybrid CMS solution combining Sitecore and Znode.

Timken Steel Level 2 to 3 Interface

http://www.timkensteel.com/
I developed a new service using C#, Kepware, and TCP/IP sockets communicating via TNet Strings (for condensed messaging) allowing software engineers to send commands to hardware on the continuously grown billet conditioning line; and get data back. The service is responsible for all level 2 communications on the production line. It reads in less than 1 millisecond.

AXS Software Platform

I provided technical expertise to solve high profile production problems impacting any systems in the enterprise. This included over 40 SQL Server databases, 1 Oracle database, over 2 million lines of C#, PHP apps, JavaScript using multiple libraries, and multiprocess workflows.

Multiplatform Service Bus

http://www.safeguardproperties.com/
An enterprise-wide service bus supporting applications on three operating systems in over a dozen programming languages. I implemented a non-SQL Couchbase solution for caching frequently accessed data.

Customer Self-service Portal

https://www.partssource.com/
A custom web portal allowing clients to access part information directly which eliminates the need for most orders to go through sales. There was a heavy emphasis placed on an intuitive UX.

NoSQL Engine for Crypto Exchange Rates

I designed and built a custom in-memory NoSQL engine to store/read/write exchange rates for cryptocurrencies across different markets. The project consisted of the engine itself, a library to connect to the engine (server), and the protocol by which the client and server communicate. The implementation allowed for the independent scaling of read operations against the blockchain and analysis of market rates for arbitrage opportunities.

Cogent Solutions

Provided comprehensive software development solutions based on our client's specific needs that integrate smoothly into enterprise organizations and consistently deliver business value on time, within budget, and as promised.

Libraries/APIs

REST APIs, Web API, jQuery, Sockets, Salesforce API, Node.js, Vue, React, CyberSource, Google Calendar API, Vuex, Windows Forms (WinForms)

Tools

Git, TFS, Jira, GitHub, Amazon CloudWatch, NPM, Stylus, Amazon Simple Queue Service (SQS), Webpack, ChatGPT, Amazon Cognito, Amazon Elastic Container Service (Amazon ECS), Visual Studio, Kentico, Flyway, TNet Strings, SendGrid, Windows Azure SDK, GitLab CI/CD, Amazon Simple Notification Service (Amazon SNS), Visual SourceSafe, Subversion (SVN), IBM Watson, Confluence

Frameworks

.NET, .NET Core, ASP.NET MVC, Entity, Kendo UI, AngularJS, ASP.NET, Angular, Bootstrap, Vuetify, Redux, NUnit, Unity, Titanium, Classic ASP, Knockout (Knockout.js), OAuth 2

Languages

C#, T-SQL (Transact-SQL), XML, HTML5, CSS, JavaScript, SQL, C#.NET, HTML, CSS3, TypeScript, XHTML, Sass, GraphQL, Python, PHP, Visual Basic, Less, Active Server Pages (ASP), VBScript

Paradigms

Continuous Integration (CI), Continuous Delivery (CD), REST, Service-oriented Architecture (SOA), Agile, DevOps, Responsive Web Design (RWD), ETL, Unit Testing, Agile Product Management, Scrum, Kanban, Test-driven Development (TDD), Azure DevOps, Model View Controller (MVC), Microservices

Platforms

AWS Lambda, Amazon Web Services (AWS), Azure, Docker, Kubernetes, Windows, Salesforce, Oracle, ZNode, Twilio, Arduino, Raspberry Pi

Storage

OLTP, Oracle SQL, JSON, PostgreSQL, Redis, Databases, Amazon DynamoDB, MySQL, Memcached, Couchbase, Amazon S3 (AWS S3), Elasticsearch, Oracle PL/SQL, Microsoft SQL Server, PL/SQL, Azure Active Directory, NoSQL, Azure Cosmos DB, IBM Db2, MongoDB

Industry Expertise

Project Management

Other

User Interface (UI), User Experience (UX), Message Queues, APIs, HTTP REST, Messaging, SOAP, Full-stack, Front-end Development, Software Development, Architecture, SaaS, CI/CD Pipelines, Front-end, Cloud, CTO, Solution Architecture, Headless Software, Content Management Systems (CMS), Data Architecture, Data Engineering, Data, Data Scraping, Web Scraping, Integration, IT Project Management, Technical Project Management, API Integration, Technical Leadership, Solution Design, Containers, Serverless, Single-page Applications (SPA), AWS DevOps, Business Strategy, Startup Consulting, Networks, OpenAI GPT-3 API, OpenAI GPT-4 API, DocuSign, Kepware Server (PLC Integration), Windows Communication Foundation (WCF), Aurigma, DOM, Scripting, PDF Scraping, DocumentDB, Okta, Outlook, TCP/IP, UDP, Sitecore, PLC, RPC, Single Sign-on (SSO), Enterprise Service Bus (ESB), Azure Pipelines, WebSockets, Firmware, Natural Language Processing (NLP)

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