Current & recent work
From business analysis to delivery.
COR-Software
Mar 2025 – PresentSolution Architect & Lead Full-Stack Engineer
Fractional · Remote
Primary application engineer for a greenfield ERP and finance platform. Own business analysis, architecture, implementation, automated testing, and release validation. Work with DevOps and mentor a trainee.
- Multi-company accounting, AP/AR, inventory, fleet and fuel, assets, CRM, documents, and versioned employee military records.
- PUMB, PrivatBank, and Monobank integrations with bank-specific parsing, duplicate detection, and configurable transaction categorization.
- Server-enforced access control, audit trails, recovery, versioned APIs, and generated documents.
GlenFlow
Dec 2021 – PresentVenture studio & portfolio companies
Remote / United States
- Head of Engineering / Director of Technology
- Dec 2021 – Jul 2024
- Senior Software Engineer
- Aug 2024 – Present
The leadership role ended when its business line closed. Employment continues, currently without an active project assignment.
ScaleGlide AI
Feb 2024 – Feb 2025Led a six-person team across four client pilots. Designed the workflow DSL and implemented the complete JumpStart core, including branching, parallel requests, model validation, formatting, stored request states, and recovery. Typical working-pilot delivery moved from approximately four weeks to two.
Read the full case →OxyDial
Mar 2023 – Nov 2024Led a six-person team and owned the cloud SaaS architecture and delivery for oxygen–hemoglobin equilibrium curve testing. Developed numerical processing, investigated fitting methods, and checked P50/P90 deviations against manual calculations, reference results, and other software.
Read the full case →CmySkills
Feb 2022 – Jul 2024Tech Lead in a four-person team, working across backend, frontend, and cloud architecture. Helped bring the job platform to production and supported its evolution before transition to new ownership.
- Co-designed an event-driven serverless architecture using AWS Lambda, S3, SQS, and SNS.
- Built one-click publishing for vacancies, company news, and other content to relevant communities on Facebook, Twitter/X, and Instagram.
Contract engagements
Working inside established products.
Wingspan
Nov 2024 – Mar 2025Senior Full-Stack Engineer · Contract
Delivered production fixes and incremental improvements across contractor lifecycle and financial workflows in a distributed product organization of more than 80 people.
Implemented gRPC service-to-service communication for selected workflows and server-side PDF generation in an established production codebase.
- TypeScript
- Node.js
- React
- GCP
- gRPC
- OpenAPI
- Jest
Livegenic
Jul 2019 – Dec 2021Full-Stack Software Engineer · Contract
Maintained and extended a Rails and React InsurTech platform as part of a 30-person product team. Resolved production defects and delivered incremental features across live video claims inspection, document workflows, customer communication, and third-party contractor management.
- Ruby on Rails
- React
- TypeScript
- SQL
Earlier experience
Integrations, devices, and everyday product work.
Freelance Software Engineer
Dec 2013 – Jun 2019Upwork & direct clients · Remote
MonitorHealth
Designed a custom MQTT telemetry protocol for cardiac-monitoring devices, including the packet structure and checksum integrity validation for de-identified data. Implemented the Ruby communication layer for real-time device exchange.
The system was completed after my involvement and subsequently released with an initial production batch of 50 devices.
RebelsMarket
One of three engineers maintaining and extending a Rails e-commerce platform. Work included cart and form improvements, storefront changes, seasonal campaigns, promotional pricing, discount logic, and supplier catalog ingestion.
Also contributed to similar-product matrices, personalized recommendations, caching, asynchronous processing, hosting, and image storage.
- Ruby on Rails
- MQTT
- AWS
- S3
- Redis
- Sidekiq
- SQL
FaceIT
Jun 2010 – Dec 2013Ruby on Rails Developer · On-site / Remote
Developed and maintained Rails applications, optimized database queries, modernized legacy functionality, and resolved production and data-related issues.
Personal work & open source
Independent projects.
Collaborative Diagram Builder
Architecting a web diagramming platform with real-time collaboration, concurrent-state resolution, and single and chained object animations. The repository is private; a demo and architecture walkthrough are available on request.
Request a walkthrough →ActionmailerX509
A Ruby library for X.509-signed and encrypted email.
NPPES
A Ruby library for external API integration with NPPES.
Playo3
A cross-platform media application built with C++, Qt, and FFmpeg, with global hotkeys and custom data-source integrations.
Technical skills
Tools across the stack.
- Languages & backend
- Python, FastAPI, SQLAlchemy; TypeScript and JavaScript, Node.js, NestJS; Ruby, Rails, Sinatra; SQL.
- Frontend
- React, Next.js, TanStack, HTML5, CSS3, Tailwind CSS, Bootstrap, Ky, Formik.
- Architecture & APIs
- Distributed systems, microservices, event-driven and serverless architecture, multi-tenant SaaS, integration design, REST, gRPC, OpenAPI.
- Cloud
- AWS Lambda, S3, SQS, SNS, API Gateway, Secrets Manager; GCP Cloud Functions and BigQuery.
- Data
- PostgreSQL, Redis, MongoDB, MySQL, SQLite, Alembic.
- Testing & delivery
- Playwright, Jest, unittest, API testing, code review, Git.
- Integrations
- OpenAI, Anthropic, AWS Bedrock, MQTT, Twilio, SendGrid, Yjs and CRDT.
- Additional development
- C++, Java, Bash, Qt, FFmpeg.
Education & languages
Background.
Master’s Degree in Software Systems
Zaporizhzhya State Engineering Academy, Ukraine
Faculty of Computer Science and Technology
- English
- B2 / Upper-Intermediate
- Ukrainian
- Native
- Russian
- Native