Hi! My name is Daniil Barvitsky. I am a software architect for fun and profit.

I like challenging projects, smart work, beautiful code, and elegant solutions. I believe that software is the closest thing to magic (in a good way). I spent recent 26 years designing and developing software for my employers and customers, running teams, building prototypes and creating solutions. I am hands-on "full stack developer", although I don't fully agree with the term. Between the whiteboard and IDE I choose both.

I run private practice and work full time. I am currently on the market for both permanent positions and 6 month+ contracts. Let us build something together!

Buzzword soup

// System analysis, design, management

Architecture

Distributed and microservice systems

Data platform and streaming pipelines

Web applications and services

Enterprise database design

Service-oriented architecture

ML platform infrastructure (feature stores, experimentation)

Line of business systems

Management

Software assessment

Software development lifecycle

Scrum

Kanban

Agile development

Waterfall

Product

Requirements management

Rapid prototyping

UX optimizations

Discovery sessions

Implementation support

// Software development

Programming languages

Scala

Java

Python

JavaScript/ES

Perl/shell

Backend

Spring Boot / Java

Node.js

.NET

Frontend

Angular

React/Redux

HTML

CSS/Sass

Data & Streaming

Apache Solr

Amazon Kinesis

Amazon Redshift

dbt

SQL

Elasticsearch

PostgreSQL

MongoDB

Apache Ignite

HBase (limited)

Applied Architecture

OpenAPI / REST

A/B testing & experimentation

Feature stores

DBC

UML / E-R models

Patterns

Development Tools

IntelliJ IDEA

Maven

GitLab CI/CD

Jenkins

Git

Docker

Terraform (basic)

Visual Studio

// Systems & integration

Cloud

Amazon AWS

Docker / containers

Azure

App / web servers

Apache Tomcat

Node.js

IIS

JBoss

Relational databases

PostgreSQL

Amazon Redshift

Microsoft SQL Server

MySQL

DB2

Operating systems

Linux

Windows

// Other / Misc

Languages

English

Russian (native)

Expo

Presentations

Demo materials

Trainings

Sales Support

Technical advisory

Estimates

Technical negotiations

# Experience // Blood, sweat, tears and pride

Apr 2020 - present

Stoneham, MA

Jobcase, Inc.

Director of Data Platform

OpenAPI toolchain — custom OpenAPI generator and automated client-generator pipeline, adopted across all Jobcase microservices (2020)
Kinesis streaming library — Jobcase-Streaming, an event-driven async processing library for Java stacks used across the data platform (2020)
Causal A/B testing platform — architected and delivered causal-core, causal-registration, causal-maven-plugin, causal-compiler-standalone and supporting infrastructure; integrated with Redshift data lake via causal-redshift-pipeline (2022)
Feature Store — designed and built Jobcase feature store and feature-store-tools for ML feature sharing and reuse across teams (2023)
Search infrastructure overhaul — hands-on architecture and development of job-ingestion-service, search-shared-components, jobcase-solr-plugins and Solr cluster management (2024–present)
Data integration service — platform-level integration layer connecting data platform producers and consumers (2025–present)
Continuous delivery tooling — ongoing ownership of CDD (shared data dictionary), cdd-core, cddtools and microservice-template; established and maintained org-wide SDLC standards
Leadership — managing and growing the Data Platform engineering team, hands-on code reviews, architecture decisions, cross-team alignment

Apr 2017 - Apr 2020

Cambridge, MA

Jobcase, Inc.

Architect

Bragi — core job listing store and search engine serving all of Jobcase and the Jobcase Network; contributed to architecture and ongoing development
CDD (Common Data Dictionary) — DSL compiler and materialization module generating Java representations from formal definitions; foundational internal tooling still in use today
Compute grid R&D using Apache Ignite and AWS SageMaker
Platform enhancements — mini filtering engine, Dockerization, data generation and test tooling
Various R&D activities and rapid prototyping

Mar 2015 - Mar 2017

Waltham, MA

Zoom Information, Inc.

architect, team lead

Responsible for architecture, design and implementation of two subsystems
Running a small team of engineers (3-10)
Various R&D activities, rapid prototyping
Onboarding and supervising ISV contractors (outsourcing)

Mar 2015 - present

Stoneham, MA

Private practice

architect, technical advisor

Technical leadership for small start-ups (design, architecture, product life-cycle)
Prototyping and proof-of-concept development
CTR (cost-to-reproduce) assessments, risk analysis
Conflict management with ISVs
Contractor selection, bidding process, procurement

2010 - 2015

Hartford, CT

VIAcode Consulting

program coordinator, practice leader

Running and managing solution practice (current projects, future sales, SDLC methodology), several small- to mid-size teams
Solutions design and expert sales support
Practice improvement, crisis management
Product management for AVIcode SharePoint line of products (acquired by Microsoft)
Post-acquisition knowledge transfer, collaboration on TechEd demo with Microsoft team

2009 - 2010

East Hampton, MA

Atalasoft, Inc. (Kofax company)

senior architect

Running a small dev team (3-6 people)
Design and implementation of VizitSP – advanced EDM solution for SharePoint, acquired by Kofax
Proof of Concept implementations with customers, technical sales support

2004 - 2009

Hartford, CT

Argos Group, LLC (T1A company)

architect, consultant

Design, implementation and development of Argos management tools for IBM/Unica
Implementations, troubleshooting, adoption projects for Fortune-100 customers (CapitalOne, American Express, Epsilon, RadioShack, Readers Digest, Kohls, ABN Amro, BJ's, BestBuy and others)
Running a mixed team (2-5 developers, several consultants)

2000 - 2004

Saint-Petersburg, Russia

Argos Company Limited

junior developer, developer, senior developer

Design and implementation of E-Tax, tax filing system for business
Various outsourcing projects (incl. model-driven UI automation framework for Win32 applications, BPM solution for procurement companies, MRM system for publishing companies)

# Education // Naiive years

2002 - 2004

Saint-Petersburg, Russia

Saint-Ptersburg ITMO University

master of science in math and computer information systems

Master thesis "Using state machines and reactive logic in enterprise software"
Internship in Argos Company Limited

1998 - 2002

Saint-Petersburg, Russia

Saint-Ptersburg ITMO University

bachelor in math and information technology

Bachelor thesis "Model-driven approach in large-scale automated UI testing for complex software systems"
Internship in Argos Company Limited

# Private practice // Moonlighting

My normal capacity is about 30-40 hours per month, usual rates are $100-$150/hr, depending on commitment or capacity. Here is what I can help you with:

Functional prototypes - this includes "clickable" UI prototypes, custom components, Proof of Concept projects, etc.
Software development and Architecture - sometimes people just need an extra pair of hands or a think tank partner. I can take on concise stories, such as implementing a small-to-mid-size feature, designing a subsystem, or helping you to come up with a technical vision for your project.
Trainings and SDLC process improvement - this may include on-site trainings on particular technology (usually 101-102 levels), recommendations on organizing your code management workflow, CI, requirements management, etc.
Technical assessments - includes technology risks assessment, CTR (Cost to Reproduce) calculation, estimates, etc.
Vendor selection / onboarding / relationship management - outsourcing to an ISV can be the best or the worst decision. I worked in outsourcing for many years and I know the back side of that kitchen well. If you need professional advice on how to pick a vendor, how to compare bids, what to look out for or how to fix a business relationship that went sour - I might be able to help.