Beauty Studio "Krasa" App
Application for a Beauty Studio. Server application with an admin panel where schedules, integrations, payments, etc. can be managed. Client apps for Android & iOS published on Google Play and the App Store. Own page with links to download can be found here: http://drybar.by/ A system with a flexible architecture, it has integrations with a bunch of APIs, such as 1C, a bank API, Firebase, etc. Optimized for work on a slow network, it has its own high-performance cache implementation and detects internal and UI errors and performance issues. The admin panel provides the ability to configure almost everything and check the application's state in real time.
https://vareyko.com/commercial/drybar
Tower Management Portal
Application for management of existing communication towers and a tool for modeling antennas/equipment/cables and other devices. The most interesting part here for me was the development of the 3D Editor, which would work fast and be stable on any device, provide the ability to support most of the modeling formats, and build AutoCAD drawings.
https://vareyko.com/commercial/tower-management
TouchCommerce
TouchCommerce a US-based enterprise customer engagement and e-commerce conversion platform. The platform combined live chat, guided self-service, personalization, customer analytics, and automated engagement tools to help large brands improve online sales, customer experience, and support efficiency.
https://vareyko.com/commercial/touch-commerce
Vdan
A porfolio of renovation/construction company in Minsk, operating since 2006. Large project portfolio (apartments, houses, commercial and office spaces) and client testimonials emphasizing on-time delivery and transparent estimates.
https://vareyko.com/commercial/vdan
MDHS Program Integrity — SNAP Fraud Case Management System
Client: Mississippi Department of Human Services, built by NSPARC (Mississippi State University). Role: lead backend developer, Dec 2016 – Mar 2018. What it does: end-to-end workflow for SNAP fraud investigators: fraud tip intake, EBT transaction search and pattern marking, FNS permission requests, DPI forms, claims with charge and determination letters, administrative hearings with waivers and audio, household and retailer profiles with transaction histograms, notes, tags and a full audit log.
https://vareyko.com/commercial/snap-integrity
Iotatech Claims (CLM) — cloud-native SaaS platform for insurance claims management
A multi-tenant, pay-per-use claims management system for insurers and third-party administrators. Insurers configure their own product lines, data models, FNOL (first notice of loss) forms and rules in a configuration portal; claim handlers work claims, tasks, documents and claimant communication (e-mail, SMS) in a claims portal; Iotatech manages tenants in an admin portal. Each tenant gets isolated databases per service, and tenants are resolved from the subdomain. Tech stack: Backend: Kotlin, Java 8, Spring Boot, Spring Cloud Netflix (Eureka, Zuul, Config Server, Hystrix, Feign), Spring Security OAuth2/JWT, Spring Session, Hibernate/JPA with PostgreSQL JSONB, Hibernate Envers (audit trail), Hibernate Search + Elasticsearch, Liquibase, Redis, Quartz, WebSocket/STOMP, Twilio SMS, Gmail API, AWS S3, iText + Thymeleaf (PDF generation), Swagger, Gradle, Detekt, Checkstyle, SonarQube, JaCoCo Frontend: Angular 6, TypeScript, RxJS, Angular Material/CDK, ngx-translate (EN/DE), SockJS/STOMP, a shared UI library published as a private npm package, TSLint Infrastructure: AWS (ECS, ECR, S3, RDS, ElastiCache, Route53), Docker, nginx, Bitbucket Pipelines CI/CD, Git Flow, Jira/Confluence/Zeplin Architecture: 6 microservices (admin, user management, configuration, claims, change management, task management) behind an API gateway with service discovery and a centralised config server; 3 Angular single-page portals sharing one component library; per-tenant database provisioning; websocket push for live updates.
https://vareyko.com/commercial/iotatech-claims-clm
AMS — Automated Merchant Setup (Wirecard)
AMS (Automated Merchant Setup) is the merchant-onboarding automation platform of a European payment provider. A partner submits a merchant registration through a REST API; AMS validates it against a configurable business-rule engine and provisions the merchant across around twenty downstream systems — acquiring and processing platforms, risk and terminal configuration, ticketing, notifications and alternative payment methods (Alipay, Apple Pay, Klarna, Sofort, WeChat Pay, Paylib, Zapp) — through a versioned, resumable workflow graph. The platform is a 41-module Maven codebase (~260k lines of Java, an integration module per external system) deployed as an RPM-packaged Tomcat application with an Oracle database. Main features: REST registration API with an XSD contract and partner templates; rule-based validation with environment-specific rule sets; a workflow engine that builds a dependency graph of provisioning nodes per registration, tracks versions and resumes from the failed node; adapters to the external systems with health checks; an operations portal with registration search and filters, node and data-flow views, request/response payload viewer, per-system performance breakdown, partner/user/operator administration; notifications by e-mail, OTRS tickets and partner callbacks; scheduled jobs for 3-D Secure enrolment, GDPR clean-up and reporting.
https://vareyko.com/commercial/automated-merchant-setup
Blog Writer
Blog Writer is a self-hosted AI pipeline that keeps a company's blog alive from the content the company already produces: the videos and photos it posts about its work. What it does Watches the company's Telegram and Instagram and fetches every new post whole: videos, photos, caption. Analyses the video: a model watches the whole clip and extracts the car, the service, the before/after numbers and the best moments for frames. Writes a full SEO article to a contract: title, meta, structure, FAQ, internal links to the company's service pages. Checks it: a programmatic SEO check plus a critic model that verifies facts against the source, technical consistency and overlap with what is already published. Waits for a person: approve, edit, comment, replace a picture or reject; nothing goes live without approval unless AUTO mode is on. Publishes into the site's CMS on a schedule, with cross-links from older articles and a sitemap refresh. Proposes new topics from what people actually search for and from clusters of finished jobs, researches them and writes them citing only the company's relevant cases. Killer features Articles built on real footage and real measurements, not generic text. Pictures from the company's own video: scored frames, a chosen hero, the post's photos placed in the article, one-click redraw of any picture with a description in any language. Operator comments are binding: the critic verifies that every comment was honoured before the article comes back. Any model in any role: cloud providers or a self-hosted model behind an OpenAI-compatible endpoint, switched in settings without code changes. A paced queue: an hourly budget and a ready-articles buffer let a backlog of hundreds of old posts drain under the publication schedule instead of flooding the reviewer or the shared model. Integrations Sources: Telegram (TDLib reader), Instagram Graph API, manual upload. CMS: Bitrix through a one-file PHP bridge (publish, update, deactivate, image cleanup, sitemap). Models: Anthropic Claude, OpenAI, Google Gemini, any OpenAI-compatible endpoint. Search demand: Google Search Console, Yandex Webmaster, Yandex Wordstat, Google and Yandex suggestions. Off-site backups server for nightly encrypted archives. Also built in A bilingual admin panel (English and Russian) with beginner guides for every credential. Encrypted secrets managed in the UI, nightly encrypted backups with one-click restore, storage limits with article archiving and restoration, per-article cost tracking, background operations with progress. Start year: 2026 End year: 2026 Technologies: Java 21, Spring Boot 4.1, MongoDB, Thymeleaf, htmx, Anthropic API, OpenAI API, Google Gemini API, OpenAI-compatible home model, TDLib, Instagram Graph API, ffmpeg, ImageMagick, Bitrix, PHP, Google Search Console API, Yandex Webmaster API, nginx, systemd, Playwright
https://vareyko.com/commercial/blog-writer
Root Studio — Low-code Platform for a Multi-tenant Lending CRM
Low-code studio and integration backend for a fintech lending CRM. Business users build CRM pages and data-entry forms in a visual editor, bind them to live data, and manage who can see what. Covers the deal pipeline, fees, contacts, tasks and notes. Microservices on the backend connect banking, crypto, FX and CRM providers.
https://vareyko.com/commercial/root-studio