Tim Nevolin, Architecture Developer in Clarksburg, MD, United States
Tim Nevolin

Architecture Developer in Clarksburg, MD, United States

Member since June 25, 2014
Tim is a software architect and developer with a proven ability to develop efficient, scalable, and fault-tolerant server solutions for complex problems. He has excellent analytic abilities and extensive experience with big data real-time processing, server solutions, and web services.
Tim is now available for hire


  • AT&T
    Go, Java, Linux, Docker, AWS S3, AWS Lambda, Amazon SQS...
  • Caterpillar
    AWS, Java, Apache Kafka, AWS Kinesis
  • Spin
    Data Migration, Global, CockroachDB, PostgreSQL


  • SQL 20 years
  • Java 20 years
  • Architecture 15 years
  • Big Data 10 years
  • Distributed Systems 10 years
  • Distributed Computing 5 years
  • AWS Cloud Architecture 5 years
  • Parallel Computing 5 years


Clarksburg, MD, United States



Preferred Environment


The most amazing...

...thing I've delivered is a real-time market data analytic system on Storm cluster.


  • Cloud Developer with Go or Strong Java Experience and AWS

    2020 - 2021
    • Helped the team to implement and deliver business requirements in the U-verse content registration system.
    • Designed and implemented development and production support tools and utility code to simplify and speed up production operations resulting in saving about 20 person-hours a week.
    • Participated in team development plan discussions and helped manage team load more effectively.
    Technologies: Go, Java, Linux, Docker, AWS S3, AWS Lambda, Amazon SQS, AWS Push Notification Service (AWS SNS), AWS CloudWatch, Terraform
  • Java Developer

    2020 - 2020
    • Studied the application architecture and infrastructure.
    • Designed and developed a new back-end data processing application as part of the company data processing system.
    • Built and programmed data processing functionality and integration with the existing data processing interfaces.
    Technologies: AWS, Java, Apache Kafka, AWS Kinesis
  • Data Migration Architect

    2019 - 2020
    • Analyzed current application and data architecture.
    • Researched potential future architecture that matches business requirements and application demands.
    • Proposed an optimal data migration solution from one Heroku platform to AWS.
    • Researched, tested, and implemented one-directional data synchronization with Bucardo. Set up such synchronization on all databases in all environments.
    • Prepared, designed, and provisioned future databases for all environments on AWS.
    • Set up, supervised, and monitored actual data migration from Heroku to AWS. Successfully migrated all lower environments.
    • Researched further data synchronization with Fivetran technology to an analytical database. Prepared step-by-step instructions for migrating said synchronization from Heroku DBs to AWS DBs in all environments.
    • Prepared documentation, how-tos, diagrams, and presentation on a matter of my research and proposals. Supported and maintained such documentation.
    • Participated in design and architectural reviews.
    Technologies: Data Migration, Global, CockroachDB, PostgreSQL
  • AWS Developer and Consultant

    2019 - 2019
    • Set up and configured the full website infrastructure on AWS, using Elastic Beanstalk and Spring Boot application.
    • Set up and configured R server in AWS EC2 instance.
    • Designed and programmed a Spring Boot web application with AngularJS client-side event management.
    • Constructed and programmed a back-end application to process user input and generate reports and outputs.
    • Built and configured a Java back end to R Engine Interface.
    • Programmed and debugged an R script to compute data and generate reports.
    Technologies: AWS, AWS EC2, R
  • Java Developer

    2019 - 2019
    Addteq, Inc.
    • Built an in-house analog of the Einstein and Firebase service with WebSocket and STOMP protocols, as well as STOMP token authentication, subscription, messages, and topics.
    • Integrated the in-house service with Confluence Excellentable plugin for a collaborative editing feature.
    • Supported migration from the existing architecture to a newly created functionality.
    Technologies: Ajax, Apache Velocity, HTML, JavaScript, Confluence, Authentication, Spring Boot, STOMP, WebSockets, Java
  • Java Developer

    2018 - 2019
    • Researched the company's current application architecture.
    • Modified the existing application, created new functionality, and enhanced existing functionality.
    • Maintained the application in production, fixed bugs, and supported deployment.
    Technologies: Java, XML, SOAP, Integration, JUnit, WSDL
  • Web Application Architect and Developer

    2018 - 2019
    • Designed and developed a single-page rich web application.
    • Built and supported complete cloud infrastructure.
    • Set up the database and designed data schema per business requirements.
    • Constructed an R back-end server; designed and developed an R application for processing large data documents.
    • Implemented UI and UX with input from the graphical interface designer.
    • Analyzed business needs and technological capacity; proposed the most optimal solutions to ongoing problems and tasks.
    Technologies: CSS, SQL, Java, HTML, jQuery, jQuery EasyUI, AngularJS
  • DevOps

    2018 - 2018
    TransBit LLC
    • Researched the company's AWS infrastructure and architecture.
    • Configured and enhanced the application's deployment automation with AWS CodePipeline and Jenkins.
    • Configured and enhanced AWS RDS database monitoring.
    Technologies: AWS, AWS EC2, AWS ELB, AWS Auto Scaling, AWS RDS, Continuous Delivery (CD), AWS CodePipeline, AWS CodeDeploy, AWS CodeBuild, Apache Tomcat, Java, AWS CloudFormation
  • Software Architect and Developer

    2017 - 2017
    Mad News Ltd.
    • Analyzed the company's current infrastructure and architecture.
    • Researched the company's MySQL database usage and application design.
    • Devised future Redshift and Dynamo DB-based architecture.
    • Prepared a MySQL to Redshift transition plan for the application and data.
    • Supervised and supported the actual MySQL to Redshift transition of the application and data.
    Technologies: Java, Redshift, SQL, AWS, AWS EC2
  • Java Developer

    2016 - 2016
    Danfoss Turbocor Compressors (via Toptal)
    • Analyzed existing code and solutions.
    • Found the source of a performance discrepancy in different input data cases.
    • Recommended solution approaches with corresponding implementation time and effectiveness.
    Technologies: Profiling, Java
  • Architect and Development Lead

    2009 - 2016
    • Architected a complete system, including data processing modules, component framework, and infrastructure for logging, monitoring, and control.
    • Designed and enforced the automated project lifecycle such as build, test, and deployment.
    • Established and enforced development best practices.
    • Maintained overall product architecture consistency and clarity to support intuitive development and easy product evolution.
    • Created and maintained technical and user documentation.
    • Researched AWS Elastic MapReduce technology (web GUI and command-line interfaces).
    • Developed Elastic MapReduce jobs capable of using Amazon S3 storage as input and output source.
    • Analyzed the existing stream of event processing solutions in a market and evaluated them against desired system qualities to find the best-suited product and framework for a project.
    • Architected a system POC version and supervised implementation.
    • Designed and implemented high availability data storage and data processing systems. That includes utilizing data storage supporting sharding technology, data and application clusters, high availability data storage, and multi-AZ deployment.
    Technologies: Amazon Web Services (AWS), AWS, Performance Optimization, Parallel Programming, Web Services, Big Data
  • Business Intelligence Architect and Developer

    2008 - 2009
    Cambridge Interactive Development Corporation
    • Adapted an existing Java-based data load application for the Netezza database, making the first generation of Netezza data warehouses operational.
    • Developed a data load application for corporate data warehousing using Data Integrator, increasing load speed four times, which was a critical achievement to support the data delivery service-level agreement.
    • Designed data marts and studied, troubleshot, and configured a company-wide scheduling system.
    • Parallelized and optimized schedule implementation, decreasing load time span by around 50%.
    • Configured the load-balancing environment for a scheduler and ETL tool.
    • Optimized corporate-wide ETL operations, cutting the overall load time in half.
    Technologies: Perforce, CVS, Data Integration, SAP BusinessObjects (BO), MySQL, Netezza, Oracle, IBM Informix, Java
  • J2EE Architect and Developer

    2005 - 2008
    Liberty Travel
    • Analyzed application requirements and communicated with the business analyst.
    • Architected and developed application modules.
    • Integrated with a third-party application API.
    • Designed and developed a web-based user interface.
    • Designed a complex data matching algorithm for integrating with the external system.
    Technologies: Oracle, XML, Servlet, JSP, Apache Struts, Enterprise Java Beans (EJB), Jakarta EE


  • Anagrammer Website

    Designed and implemented back-end engine to find word anagrams for multiple languages as well as many other word games on this site.

  • Enterprise Architecture Inventory Application

    A thick client single-page web application that extensively uses Ajax, AngularJS, and JavaScript to save and update information on the web page, control the UI flow, refresh the layout in response to user events, etc.

    I designed and built a complete application from back to front: AWS environment, database, data schema, back-end layers, front-end design and functionality, event processing, UI libraries, graphical libraries, CSS, and styles.

  • International Health Data Processing Web Application

    A thick client single-page web application built with AngularJS, JavaScript, jQuery, and Ajax. It provides user security and a wizard application for data entering and modifying as well as output generation. It works in close relation with the R back-end server to load and calculate output data.

    I am the sole architect and developer of a complete solution from back to front: AWS environment, database, data schema, back-end layers, front-end design and functionality, event processing, UI libraries, graphical libraries, CSS, and styles.

  • Eight Rules for Effective Software Production (Publication)
    While working at different stages of the software development lifecycle you often realize that software production isn’t easy. It takes consistent effort to make something great. However, it doesn’t have to come at the cost of working through nights or weekends. In this article, Toptal Freelance Software Engineer Timofey Nevolin shares eight simple, yet powerful rules for effective software production.


  • Languages

    CSS, SQL, R, Java, HTML, JavaScript, PHP, WSDL, C++, XML, Go, Scala, Python
  • Frameworks

    Spring Boot, Spring, AWS EMR, Spring MVC, AngularJS, Storm, JUnit, Apache Struts, JSP, Apache Velocity, Apache Spark
  • Libraries/APIs

    jQuery, jQuery EasyUI, Amazon API, AWS EC2 API
  • Tools

    CVS, AWS CodeBuild, AWS CloudFormation, AWS CodeCommit, AWS CodeDeploy, Servlet, Confluence, Maven, Amazon SQS, AWS Push Notification Service (AWS SNS), AWS CloudWatch, AWS ELB, Apache Tomcat, AWS Step Functions, Terraform, GoLand
  • Paradigms

    Distributed Computing, Model View Controller (MVC), Concurrent Programming, Linear Programming, Evolutionary Database Design, Business Intelligence (BI), Parallel Computing, Continuous Delivery (CD), Microservices Architecture, Design Patterns, Test-driven Development (TDD), DevOps, Microservices, Serverless Architecture
  • Platforms

    Eclipse, AWS EC2, Java EE, AWS Elastic Beanstalk, Oracle, Amazon Web Services (AWS), AWS Kinesis, AWS Lambda, Docker, Linux, Apache Kafka
  • Storage

    Data Integration, Greenplum, PostgreSQL, Redshift, MySQL, Netezza, Distributed Databases, AWS S3, Relational Databases, Amazon Aurora, IBM Informix, Cassandra, AWS DynamoDB, CockroachDB
  • Other

    Ajax, Architecture, Data Migration, Physics, AWS Cloud Architecture, AWS Certified Solution Architect, Algorithms, Multithreading, Decision Analysis, Optimization, Linear Optimization, Performance Optimization, Decision Trees, Software Architecture, Team Mentoring, Technical Project Management, Web Development, Sharding, Distributed Systems, Disaster Recovery Plans (DRP), Relational Database Services (RDS), Big Data, Big Data Architecture, System Architecture, Software Development, Software Development Lifecycle (SDLC), AWS Auto Scaling, AWS RDS, Integration, Data Engineering, Data Warehousing, Back-end, Fintech, Data Modeling, Profiling, WebSockets, Authentication, Video Streaming, AWS DevOps, Cloud, IT Project Management, AWS CodePipeline, Machine Learning, Artificial Intelligence (AI), Linear Algebra, SOAP, UI, Enterprise Java Beans (EJB), Containers, Web Services, AWS


  • MBA Degree in Management Information Technology – IT Project Management
    2007 - 2009
    Western Governors University - Salt Lake City, UT
  • University Degree in Experimental Particle Physics
    1990 - 1995
    Novosibirsk State University - Novosibirsk, Russia


  • AWS Associate Architect
    JANUARY 2011 - JANUARY 2013

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