Andrii Medytskyi

 Andrii Medytskyi Back-end Development Developer Kraków, Poland Toptal member since October 4, 2019 Bio Seasoned software engineer with over eight years of experience developing applications with Java, .NET, and Go. Focused on back-end development in Go and scalable cloud solutions with strong observability (monitoring, logging, tracing). Experience Senior Software Engineer | Datto 2023 – Present - Troubleshot complex issues with Linux backup servers, implemented quick and long-term fixes. - Built a new backup solution in Go from scratch (analysis → POC → design). - Facilitated collaboration across teams to deliver a new billing model for four products. - Performed cost-reduction work in development and production clusters. - Designed and implemented new features from requirements. - Conducted technical interviews for mid and senior roles. Tech: Azure, Azure VMs, MySQL, Cassandra, Kubernetes, Helm, Terraform, Vault, GitLab CI/CD, Go, gRPC, RabbitMQ, Microservices. Systems Development Engineer II L5 | Amazon Canada 2022 - Configured CI/CD for a new ETL initiative, reducing SDE involvement by 80%. - Improved AWS step function data pipeline; corrected ~6,000 miscategorized entities. - Collaborated on POI extraction initiatives; produced documentation. Tech: AWS Lambda, EMR, Scala, Spark, Java, Step Functions, Glue, S3, Athena, CloudFormation, Microservices. Full-stack Developer | Mumo Systems 2019 – 2022 - Designed and implemented React application and reusable UI components; MVP launched shortly after joining. - Configured batch processing and scheduling in Spring; worked extensively with Atlassian APIs. - Delivered numerous backend and frontend features; performed code reviews. Tech: Java, Spring Boot, PostgreSQL, React, Redux, Atlassian SDK, Docker. Software Engineer | Intellias 2018 – 2019 - Supported online learning platform (~100,000 users) built with ASP.NET Web API and Knockout.js. - Built recommendation system for most viewed videos. - Implemented weekly digest emails using Hangfire and Azure Functions. Tech: React, Azure Analysis Services, Functions, SQL Server, Microservices. Software Engineer | N-iX 2016 – 2018 - Built Azure Service Fabric microservice for UK credit bureau reporting (~300,000 loans). - Automated user loan change apps; reduced manual reviews by 80%. - Created arrears tracking system for 40,000+ users. Tech: Angular, Azure Service Fabric, SQL Server, .NET. Software Engineer | Inoxoft 2016 - Developed UWP app for touchscreen devices. - Built Azure WebJob to transform image data efficiently. Tech: Azure WebJobs, AngularJS, WPF, UWP, .NET. Software Engineer | ByteAnt 2015 – 2016 - Migrated ADO.NET data layer to Entity Framework. - Built pixel-perfect HTML/CSS pages; optimized LINQ queries. Tech: ASP.NET MVC, SQL Server, jQuery. Education Bachelor’s Degree in Applied Mathematics Lviv University of Ivan Franko — Lviv, Ukraine -) Certifications - Algorithms — Stanford University (Coursera) - Big Data Analysis with Scala and Spark — Coursera - Parallel Programming — Coursera - Functional Program Design in Scala — Coursera - Functional Programming Principles in Scala — Coursera - MS: Programming in C# — Microsoft Skills Languages: C#, SQL, JavaScript, Java, Go, CSS, HTML5, TypeScript, C++, Scala Frameworks/Platforms: .NET, ASP.NET Web API, ASP.NET MVC/Core, Spring Boot, React, Redux, Kubernetes, Docker Tools: Git, Terraform, Helm, Docker Compose, GitLab CI/CD, RabbitMQ, AWS, Azure Services Databases: MySQL, PostgreSQL, SQL Server, Cassandra