Viktor – RxJS, Angular, Typescript, experts in Lemon.io

Viktor

From Ukraine (UTC+3)flag

Front-end Web Developer|Middle-to-senior

Viktor – RxJS, Angular, Typescript

Viktor is a strong Frontend Engineer with 10 years of experience, specializing in Angular (versions 12–20), TypeScript, and RxJS across cybersecurity SaaS, insurtech, and enterprise platforms. He's spent the last 4+ years as the core frontend owner at a product-stage cybersecurity company — building 70% of the UI, driving a complete Angular modernization, and growing into an organic team lead who hires, mentors, and raises the bar on delivery cadence. He's not just a strong IC: he tightens release pipelines, rolls out tooling across teams, and owns the frontend org as a whole. Sharp instincts for developer productivity, including early adoption of AI coding tools in production.

10 years of commercial experience in
Cybersecurity
Data analytics
Fintech
Insurance
Enterprise software
SaaS
Main technologies
RxJS
5.5 years
Angular
8.5 years
Typescript
8.5 years
Additional skills
Figma
CI/CD
AWS
NgRx
JavaScript
React
Claude Code
Cursor
Node.js
Direct hire
Possible
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Experience Highlights

Senior Frontend Engineer
Aug 2022 - Ongoing4 years
Project Overview

A B2B cybersecurity SaaS platform that helps organizations manage their vulnerability lifecycle — from risk prioritization to patch execution and threat protection — serving security-conscious enterprises.

Responsibilities:
  • Owned and built roughly 70% of the product UI and core frontend logic from early-stage growth.
  • Drove the Angular migration from version 12 through 20, modernizing the codebase incrementally without disrupting delivery.
  • Introduced Vitest and led the testing migration across the frontend team.
  • Hired and mentored four frontend engineers; led a cross-functional squad spanning FE, BE, Agent, and QA.
  • Improved release cadence from weekly to daily by introducing trunk-based development, feature flags, and CI/CD pipelines.
  • Rolled out Claude Code, Cursor, and CodeRabbit across the team, measurably accelerating feature delivery.
Project Tech stack:
Angular
Typescript
RxJS
Figma
CI
CD
Senior Frontend Engineer
Dec 2020 - Jul 20221 year 6 months
Project Overview

A geospatial analytics platform for the global reinsurance industry that delivers real-time analysis of natural catastrophe events and their economic impact on insured assets worldwide.

Responsibilities:
  • Built Mapbox GL features including selectable threat layers, landscape measurement, and map/dashboard integration.
  • Integrated frontend features with REST APIs and NgRx.
  • Optimized layer-coordinate handling and mouse-positioning logic.
  • Improved performance by about 20% and strengthened API integration for live economic-impact data.
Project Tech stack:
Angular
Typescript
NgRx
AWS
Middle Frontend Engineer
Aug 2019 - Dec 20201 year 4 months
Project Overview

A cybersecurity SaaS product built for enterprise clients to manage their vulnerability lifecycle — covering CVE tracking, risk assessment, and automated patch management workflows.

Responsibilities:
  • Led a frontend architecture redesign that reduced recurring bugs from approximately 10 per cycle to 1.
  • Improved frontend performance by roughly 30% through profiling and targeted optimization.
  • Owned frontend automation for CVE risk management end-to-end, including patch status updates and script execution flows.
Project Tech stack:
Angular
Typescript
JavaScript
Junior Frontend Engineer
Aug 2018 - Aug 20191 year
Project Overview

A secure internal web application for a US-based fintech company that enabled non-technical staff to manage database records through a structured, permissioned UI — replacing manual database access workflows.

Responsibilities:
  • Built a role-based access control (RBAC) web application for a US banking and fintech client.
  • Architected and implemented fine-grained permission logic covering multiple user roles and data scopes.
  • Delivered the application in close collaboration with backend and compliance teams.
Project Tech stack:
Angular
React
Typescript
Junior Frontend Engineer
Sep 2017 - Aug 201811 months
Project Overview

An enterprise telecom platform serving a major operator's CRM and billing operations — built to handle complex customer lifecycle management, service provisioning, and billing reconciliation at scale.

Responsibilities:
  • Owned frontend work on CRM and billing modules within a large engineering organization.
  • Contributed to complex feature delivery in a high-throughput enterprise codebase.
  • Represented the engineering team at an international knowledge-sharing summit in Turkey.
Project Tech stack:
Angular
Typescript
JavaScript

Education

2017
Computer Engineering
Bachelor of Engineering

Languages

Ukrainian
Advanced
English
Advanced

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