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David SaleyDS
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David Saley

@davidsaley

Senior Full Stack Engineer at Rubyroid Labs who took a mortgage lending integration from an empty service to production on EKS.

Belarus
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At Rubyroid Labs, I took the Vesta and Xactus 360 mortgage lending integration from an empty service to production on EKS. I also built a Temporal workflow for the ServBank servicing handoff and shipped Hush, a multi-tenant compliance platform.

For Hush, I worked across its API, PostgreSQL row-level security, and React admin, and stood up its AWS infrastructure with Terraform and Kubernetes. I also built Snowflake ingestion pipelines using Airflow and dbt.

On Unconscious Moderation, I built a B2C wellness app from scratch as the sole developer. I shipped its Expo app and built the NestJS API with PostgreSQL, Redis, and RevenueCat webhooks.

Before Rubyroid Labs, I developed frontend features for MOBYRIX's payments and eSIM platform, then worked on healthcare, IoT, aircraft, and creator monetization products at Paralect. I also bring freelance experience building e-commerce and blogging platforms, and use Cursor agents with MCP alongside tests, lint, type checks, and code generation.

Experience

Work history, roles, and key accomplishments

Rubyroid Labs logoRL
Current

Senior Full Stack Engineer

Rubyroid Labs

Nov 2025 - Present (1 year)

Production work for a US mortgage lender (loan origination, servicing handoff, consumer compliance) and a B2C wellness app.

Revolution Mortgage
- Built the Vesta and Xactus 360 integration from an empty service to production on EKS. Temporal workflows place an undisclosed-debt order at underwriting and write the result back onto the loan. Moved the service off Fly.io.
- Built the ServBank servici

MOBYRIX logoMO

Frontend Developer

MOBYRIX

Sep 2024 - Oct 2025 (1 year 1 month)

Key Achievements:
-Built a responsive web platform with modern UI and complex payment flows.
-Integrated secure payments (PayPal, credit cards, crypto, Apple/Google/Binance Pay).
-Implemented internationalization (i18n) for 8 languages and optimized cross-regional performance.
-Developed complex state logic for user profiles, eSIM activation, and subscriptions.
-Improved SEO via advanced meta-tags

Paralect logoPA

Full-stack Developer

Paralect

Jul 2022 - Jul 2024 (2 years)

Key Projects & Achievements:

- PremedGo (Healthcare Platform)

Engineered a comprehensive document generation, editing, and templating system within the admin panel, streamlining complex data presentation workflows.

Implemented a reliable PDF export feature using Puppeteer and Handlebars, enabling users to download formatted documents seamlessly.

Developed and launched a cross-platform mobile a

FE

Full Stack Engineer

Freelance (Self employed)

Jul 2019 - Aug 2020 (1 year 1 month)

Independent full-stack work for local clients.

E-commerce Platform
- Built a storefront with product management, cart, checkout, and Stripe payments.
Node.js, React, Express, Prisma, PostgreSQL.

Blog Platform
- Built a blogging CMS with authentication, commenting, and admin tools.
Node.js, React, Express, MongoDB.

Education

Degrees, certifications, and relevant coursework

MU

Minsk Innovation University

Бакалавр, Logistics, material supply and supply chain management

2018 - 2022

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