Konstantinos Giannelos
Verified Expert in Engineering
Software Developer
Athens, Central Athens, Greece
Toptal member since December 21, 2021
Konstantinos is a future-oriented professional with an exceptional blend of technical acumen and passion for building novel software, tools, and methodologies to drive fundamental, far-reaching changes. He has expertise in designing scalable, redundant, and cost-efficient solutions on the AWS platform. Instrumental for companies of all sizes, from startups in the early stages to enterprises, he played a key role in the cloud adoption journey of his clients.
Portfolio
Experience
- Software Engineering - 13 years
- AWS Cloud Architecture - 10 years
- Infrastructure as Code (IaC) - 6 years
- Cross-functional Team Leadership - 6 years
- DevOps - 4 years
- React - 4 years
- JavaScript - 4 years
Preferred Environment
React, JavaScript, Node.js, Windows, Linux, Infrastructure as Code (IaC), Serverless, AWS Cloud Architecture, AWS Command Line Interface (CLI), Amazon Web Services (AWS)
The most amazing...
...thing I've developed is a 2D network graph visualization that made its way as a publication to pharmaceutical engineering on ISPE.org.
Work Experience
Senior Solutions Architect
CherryCircle Software
- Implemented code product features like risk maps, risk tables, process flow maps, risk management plans, AI smart import, core file management, data replication capability, and many others.
- Created functional UI test cases and resolved bugs.
- Handled the implementation of the enterprise IT package version of the product, a multi-region deployment capability, so that the product can be deployed to multiple AWS regions.
- Implemented a CI/CD pipeline for deploying and testing new software releases on the AWS cloud.
- Integrated the product infrastructure as code on AWS.
Chief Architect
Aurea
- Increased the product's uptime from less than 80% to more than 99.5% and helped Aurea regain customers' confidence.
- Invented innovative cloud migration methodology to migrate enterprise software with minimal downtime; successfully applied solution to four new business acquisitions.
- Prepared team to excel in the cloud and AWS space by providing effective technical guidance and training, including writing hundreds of documents for technical run books and defining standards for cloud migration.
- Oversaw migration of 500+ servers in diverse environments, including Windows, Linux, Microsoft SQL Server, Microsoft Exchange, Microsoft SharePoint, Oracle, Sterling B2B, Tcl Web, .NET, Java, Perl, MySQL, and PHP.
SaaS AWS Architect
DevFactory
- Accomplished $2,000,000+ annual savings on AWS infrastructure costs.
- Documented cost optimization run books and built the foundational standards for future deployments on AWS.
- Collaborated with SaaS teams on AWS cost optimization projects and supervised all planned cost-saving activities.
Senior Manager | QA Architect
gTeam
- Conceptualized, prototyped, and patented innovative test coverage model applicable to all software products and transparent to all tech stacks (US patent application #14/689645).
- Delivered technical leadership to all QA projects for clients such as Wells Fargo, General Motors, Fannie Mae, and Deutsche Bank; architected and prototyped custom production validation solution for Deutsche Bank London.
- Spearheaded the design of multiple tools to automate testing, increase productivity, and enforce quality standards of produced test cases to stability levels above 99%.
- Built the foundation of the test cases factory and tools, such as screen coverage tool using C#, ASP.NET, JavaScript, and Microsoft SQL Server, TestComplete test automation bot using C#, XML, and WCF, and NameMapping bot using C#, WPF, and WCF.
Experience
QbDVision
https://www.qbdvision.com/I was the first employee to join a visionary startup aiming to disturb the life sciences industry. I have been instrumental in defining the technical roadmap for a suite of software solutions for managing the lifecycle of pharmaceutical products and the evolution of process development and validation.
This was a multi-hat role with responsibilities for:
• Software architecture, making code contributions, designing product APIs, and evaluating technology options and vendors.
• Infrastructure design for product redundancy, scalability, resiliency, and cost optimization.
• DevOps, product monitoring, and enabling developers through automated and scalable CICD pipelines.
• Centralizing operations and reducing overhead.
• Securing software and infrastructure.
Education
Master's Degree in Electrical and Computer Engineering
National Technical University of Athens - Athens, Greece
Certifications
Machine Learning
Coursera
AWS Certified Developer Associate
AWS
AWS Certified DevOps Engineer Professional
AWS
AWS Certified Solutions Architect – Professional
Amazon Web Services
AWS Certified SysOps Administrator Associate
AWS
AWS Certified Solutions Architect Associate
AWS
Skills
Libraries/APIs
React, AWS Amplify, Node.js
Tools
AWS CloudFormation, AWS IAM, Amazon CloudWatch, AWS CloudTrail, Amazon Elastic Block Store (EBS), AWS SDK, AWS ELB, Amazon Textract, AWS CodeDeploy, AWS CodeBuild, AWS Fargate, AWS Command Line Interface (CLI), Amazon Virtual Private Cloud (VPC), Amazon CloudFront CDN, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (SNS), Amazon Cognito, Amazon Athena, AWS Cost Explorer, Amazon Simple Email Service (SES), Amazon WorkSpaces, AWS CodeCommit, Jira, CircleCI, AWS Systems Manager, Amazon Elastic Container Service (ECS), AWS AppSync, Amazon OpenSearch, AWS Key Management Service (KMS), Amazon QuickSight, Amazon Elastic Container Registry (ECR), AWS Glue
Platforms
AWS Lambda, Amazon Web Services (AWS), Amazon EC2, TestComplete, Windows, Linux, AWS Elastic Beanstalk, Docker
Storage
Relational Databases, Amazon S3 (AWS S3), Amazon DynamoDB, Amazon Aurora, AWS Snowball, SQL Server 2005, AWS CodeStar, Azure Active Directory, MySQL
Languages
JavaScript
Paradigms
DevOps, REST
Frameworks
AWS Serverless Application Model (SAM)
Other
Serverless, AWS Cloud Architecture, Business Continuity, Cloud Security, Infrastructure as Code (IaC), AWS Organizations, Identity & Access Management (IAM), AWS Certified Solution Architect, Migration, Software Engineering, AWS CodePipeline, Amazon RDS, AWS Secrets Manager, Web Application Firewall (WAF), AWS Auto Scaling, Amazon API Gateway, Relational Database Services (RDS), AWS Control Tower, Trusted Advisor, Single Sign-on (SSO), IT Project Management, Amazon Route 53, DNS, AWS Certified SysOps Administrator, Cross-functional Team Leadership, Machine Learning, Incident Management, AWS X-Ray, Amazon Kinesis, Amazon EventBridge, Logistic Regression, Artificial Neural Networks (ANN), Machine Learning Algorithms, AWS Direct Connect, IT Networking, WebSockets
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