Aleksandr

ALEXANDER SEMERENKO
Frontend Developer
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Odesa, Ukraine | LinkedIn | Telegram

PROFESSIONAL SUMMARY
Front-end developer with 4+ years of experience building complex, data-heavy interfaces for regulated industries — insurance,
healthcare, fintech — across 15+ client projects, including long-term ownership of a large-scale platform end to end. Skilled in
component-based architecture, data visualization, responsive/mobile UI, and technical design, with strong hands-on experience in
JavaScript, TypeScript, and React-based development.

TECHNICAL SKILLS
Languages & Markup: JavaScript (ES6+), TypeScript, HTML5, Libraries & Tools: Chart.js (Datalabels & custom plugins), React
CSS3/SCSS, CSS Preprocessors (Sass/Less), React, Redux Query, React Hook Form, Confluence
UI & Styling: Tailwind CSS, Styled Components, CSS Modules State Management: React Context API, Redux
Salesforce: LWC, Aura, Visualforce, Experience/Community API & Data Handling: RESTful/SOAP APIs, GraphQL, WebSockets,
Cloud, App Builder Axios, Fetch API
Front-End Engineering: Reusable / modular component Integration & Practices: SLDS (Lightning Design System),
architecture, responsive & mobile (iOS/Android), cross-browser & Salesforce DX / VS Code, Web Accessibility (WCAG/ARIA)
cross-platform compatibility, custom datatables, drag-and-drop Version Control: Git, GitHub, GitLab, Bitbucket, GitFlow
UI, PDF generation & preview, Excel/CSV generation, URL state
Testing & Design Tools: Jest, Unit Testing, Figma
management
Certifications: Salesforce Certified JavaScript Developer
Languages: English — B2, Ukrainian — Fluent

PROFESSIONAL EXPERIENCE
Frontend Developer, Synebo
Aug 2021 – Present
● Insurance Brokerage Platform — As part of a multi-developer front-end team, owned delivery of core features over a full year
on a complex UK Lloyd's brokerage platform: dynamic fee-transaction layouts and a clause-selection tool filtering coverage
forms by product/insurer/business area, plus claim-matching and risk-classification screens backed by an editable data grid and
smart, pre-populated lookup components.
● Marketing Collateral Hub — Independently built a full-featured marketing portal from scratch: a searchable, filterable catalog
with multi-select filters, favorites, and share/preview modals for PDF and video content, plus lazy loading, URL-driven filter
state, multi-language content support, and a responsive mobile layout — designed to let marketing teams self-serve collateral
without relying on engineering support.
● Patient Adherence Tracker Widget — Solely developed a healthcare widget to help clinicians and care managers quickly spot
patients falling behind on medication: a custom dynamic datatable and Chart.js visualizations surfacing adherence trends, an in-
app PDF document viewer and expandable accordions for reviewing patient records, and cross-platform fixes ensuring reliable
use on iOS and Android.
● Wealth & Insurance Planning Product — As part of a front-end team, built configurable builder components — property
portfolio, insurance coverages, and returns & performance — to help financial advisors quickly assemble personalized client
plans, along with client/family snapshot summaries featuring an Open Banking entry point, Chart.js dashboards feeding auto-
generated PDF reports, and full multilingual support for international clients.
● Financial Reporting Portal — Independently developed custom datatables for invoices and debit/collection summaries to help
the finance team reconcile accounts faster, featuring data aggregation, custom datatable fields, and inline PDF document
viewing.
● Product Ordering Tool with Excel Export — Delivered a stock-level ordering interface with a custom autocomplete lookup,
dynamic columns, client-side Excel file generation, and a dedicated mobile/iOS version, designed to simplify the ordering
workflow for field sales teams.
● Client Collaboration Portal Features — Shipped collaboration features for a client-facing portal — a mechanism for direct
messaging between portal users, a case-collaboration tool (add members/email), and activity-feed text/tag normalization —
with profile-based visibility logic to support secure client collaboration.

EDUCATION
Odesa National Economic University
Master's Degree in Accounting and Taxation | 2013 – 2019