Marek Kałużny
Verified Expert in Engineering
DevOps Engineer and Developer
Marek is a certified AWS solutions architect with expertise in delivering IT projects, from shaping the idea and collecting the requirements up to post-go-live support with hands-on experience in delivering large-scale projects. He's comfortable describing architecture to non-technical executives and supporting the team daily. Designing and building new serverless apps, migrating existing workloads to the cloud, or improving the existing solutions are the areas in which he can help the most.
Portfolio
Experience
Availability
Preferred Environment
Visual Studio Code (VS Code), Amazon Web Services (AWS), AWS Cloud Development, Amazon Elastic Container Service (Amazon ECS), Node.js, JavaScript, TypeScript, Draw.io, iTerm2, Fast Healthcare Interoperability Resources (FHIR)
The most amazing...
...project I've been involved in is developing the digital COVID-19 pandemic response for NHS UK. The apps designed by me were available for all UK citizens.
Work Experience
Cloud Architect
Self-employed
- Helped multiple customers migrate the workload to AWS.
- Shared knowledge with other developers on the team.
- Helped customers choose the right technology and maximize the reusability of components.
- Assisted customers in making informed decisions by providing the AWS CloudWatch dashboards, which are used to understand traffic or pick hours.
Solutions Architect
Kainos
- Designed and actively developed serverless applications for UK citizens as a digital response to the COVID-19 pandemic. Worked under high time and reputation pressure in a highly controlled, multivendor environment.
- Worked as a solution architect on a healthcare product that presented a single patient view combining records from several underlying systems. ETL jobs, real-time integrations, and a significant amount of data to process.
- Represented the company during the technical design authority meetings presenting technical solutions.
- Oversaw the penetration test of the delivered applications and worked on addressing the findings.
- Built and maintained the performance tests tooling with the JMeter cluster.
Software Specialist
Transition Technologies PSC
- Worked in the international teams on developing customizations and interfaces for the Windchill PLM system. I managed integrations based on Java and JMS for Nokia and Java for Hager.
- Participated in conferences. The presentations were on Scrum and mobile development using Sencha Touch.
- Maintaining and developing custom solutions for SharePoint 2010.
Experience
Application for Submitting the COVID-19 Test Results
The number of results submitted through the applications hit hundreds of thousands daily during the peak period. The performance, security, and availability were vital for this application. Additionally, it was the first time that this custom user management system based on AWS Cognito was used on such a scale in the UK.
Education
Master's Degree in Computer Science
University of Information Technology and Skills (WSINF Lodz) - Lodz, Poland
Certifications
AWS Certified Solutions Architect Associate
AWS
Skills
Libraries/APIs
Node.js, React
Tools
Amazon Elastic Container Service (Amazon ECS), Amazon CloudWatch, Draw.io, Apache JMeter, Amazon Cognito
Platforms
Amazon Web Services (AWS), AWS Lambda, Visual Studio Code (VS Code), Docker
Languages
JavaScript, TypeScript, Java
Paradigms
Agile, Fast Healthcare Interoperability Resources (FHIR), Agile Software Development, Microservices
Storage
PostgreSQL, Amazon DynamoDB
Frameworks
OAuth 2
Other
AWS Cloud Development, Architecture, Serverless, BlazeMeter, AWS Cloud Architecture, Cloud Migration, iTerm2, Amazon RDS, Integration, Windchill PLM, Cloud Security, Containerization
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring