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Savva CashinSC
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Savva Cashin

@savvacashin

Senior Fullstack Engineer at Teamatical who rebuilt checkout for ~50 US storefronts, increasing completed payments by ~5–7%.

Thailand
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At Teamatical, I rebuilt checkout as a three-step flow with server-side state for ~50 US storefronts; completed payments increased by ~5–7% after release. I also replaced free-text deal configuration with a structured UI and field-level validation, making configuration ~8.5x faster.

I led Teamatical’s CRM migration from Polymer to Lit, using a new shell over legacy components so both versions could run on one backend during a staged rollout. About 95% of the legacy code was removed, all staff moved over, and the migration had zero downtime.

At Vade, I rewrote the early CRM on React, TypeScript, and FSD for two teams, and documented the system with C4 diagrams. I also introduced a BullMQ watchdog that reduced manual stuck-job fixes from 2–4 a week to about one a month.

At European Legal Service (ELS24), I grew from Frontend Developer to Team Lead, Fullstack, starting the company-wide CRM and building a team of four around it. My work there included improving dashboard performance with PostgreSQL and Redis, automating payment reconciliation, and rebuilding video consultations with WebRTC.

Experience

Work history, roles, and key accomplishments

TE

Senior Fullstack Developer

Teamatical

Jan 2026 - Sep 2026 (8 months)

Replaced free-text deal configuration with a structured UI and moved the C# backend to JSON with field-level validation errors, making configuration ~8.5x faster. Led CRM migration from Polymer to Lit with zero downtime and rebuilt checkout for ~50 US storefronts, increasing completed payments by 5-7%.

RI

Frontend Developer

RITS

Mar 2020 - Feb 2021 (11 months)

Rewrote the Canvas quarry map filtering, reducing equipment search time from 60s to 5s, and refactored legacy Angular/NgRx code with test coverage to 80%.

FR

Frontend Developer

Freelance

Aug 2018 - Feb 2020 (1 year 6 months)

Built e-commerce storefronts end to end and dozens of landing pages, migrating jQuery sites to React and Angular SPAs while working directly with clients.

Education

Degrees, certifications, and relevant coursework

Yandex logoYA

Yandex

Certificate, Node.js

Completed the Yandex Node.js course in 2024.

Novosibirsk State University logoNU

Novosibirsk State University

Bachelor of Science, Computer Systems

Bachelor of Science in Computer Systems from Novosibirsk State University, completed in 2022.

CS

CFT Focus Start

Certificate, Computer Science

Completed the CFT Focus Start program in 2021.

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