# Anna Kazannik

> Software Engineer

Location: New York, New York, United States
Profile: https://flows.cv/annakazannik

I'm a Full Stack Software Engineer with a focus on creating scalable, real-time web applications that deliver exceptional user experiences. My technical foundation lies in frontend technologies like React, TypeScript, and JavaScript, coupled with back-end expertise in Node.js, allowing me to build comprehensive solutions that meet both user and business needs.

With a proven record across industries like fintech, blockchain, and SaaS, I’ve honed my skills in enhancing system performance, optimizing workflows, and fostering cross-functional collaboration to drive impactful results. I’m motivated by a passion for web development and committed to staying at the forefront of industry advancements.

## Work Experience
### Full Stack Software Engineer @ Vendelux
Jan 2025 – Present | New York, United States

### Software Engineer @ Highbeam
Jan 2024 – Jan 2024 | New York, United States
· Led the development of user-facing features for the capital product, enhancing usability and accessibility for a diverse client base.
· Rolled out Credit Application v2, which streamlined the underwriting process, reducing customer errors and support emails by 50%.
· Developed and implemented email notification templates, improving communication flow and user engagement.

Key Technologies: React, TypeScript, SCSS, React Hook Form, React Context, SendGrid API, Kotlin

### Software Engineer @ Owl Protocol
Jan 2023 – Jan 2024
· Built advanced authentication systems with social sign-in capabilities, enhancing security and ease of use.
· Integrated backend services to improve data handling and real-time updates, boosting overall system reliability.
· Developed frontend elements for a developer dashboard, ensuring seamless interaction and efficient state management.

Key Technologies: React, TypeScript, React Context API, Chakra UI, Firebase, tRPC, Clerk, Web3.js, Ethereum, MetaMask

### Founding Software Engineer @ Pesto
Jan 2021 – Jan 2022
• Second hire at a pre-seed round startup with MVP product
• Led product monetization through Stripe integration, managing subscription workflows for over 50 paying teams within the first month.
• Architected and implemented UI/UX components in collaboration with Design and Product teams, enhancing user engagement and satisfaction.
• Improved system stability by 20% with a custom real-time synchronization engine, replacing Firebase and enhancing backend performance.
• Designed and implemented an advanced permissioning model to ensure secure team administration across workspaces.
• Integrated third-party tools to create seamless user workflows, enhancing product functionality and user experience.

Key Technologies: React, TypeScript, WebSockets, PostgreSQL, TypeORM, GraphQL, Firebase RTDB, Stripe, React Native, Redis, Datadog

### Frontend Engineer @ Personal Projects
Jan 2020 – Jan 2020
TKOut | Full Stack application that manages reservations for restaurants 
React, Node.js, Express.js, MySQL, Docker, EC2, S3

• Decreased page load speed by 7s by minimizing the number of HTTP requests and performing data massaging, and utilizing compression webpack plugin to minimize the bundle file
• Implemented a proxy with an API Gateway that serves as an interface to microservices behind it, hiding the endpoints from the public
• Followed a Test Driven Development by utilizing Jest and Enzyme testing frameworks to achieve 70% test coverage

### Back End Developer @ Personal Projects
Jan 2020 – Jan 2020
Rebook | Application for vacation rental service that designed to support high traffic with over 10 million listings
React, Node.js, Express.js, Postgres, NGINX, EC2, S3, New Relic, K6, Loader.io

• Conducted benchmarks on Postgres and Cassandra to determine which database has the best performance for the application
• Implemented a RESTful CRUD API, reduced primary read query time by 900% by optimizing database queries, Postgres memory parameters and indexing join columns
• Increased traffic capability from 250 RPS to 2000 RPS by horizontally scaling to 6 AWS EC2 instances, vertically scaling Postgres and setting up an NGINX load balancer

### Full Stack Engineer @ Personal Projects
Jan 2020 – Jan 2020
Florisome | Plant Care Web Application
React, Node.js, Express.js, MongoDB, Styled Components, AWS S3
• Leveraged React and JavaScript to handle DOM manipulation and state management
• Implemented capability for users to upload photos and store them in an Amazon S3 bucket
• Used MongoDB to store user activity and developed an algorithm to send user notifications

### Business Development Associate @ KANSAI HELIOS Ukraine
Jan 2017 – Jan 2019 | Cherkasy Region, Ukraine
Ukrainian division of the top coatings company in Europe, KANSAI PAINT Group
• developed and drove new strategic directions to improve the competitiveness of export products
• co-operation with the top-tier partners on the best win2win terms


## Education
### Advanced Software Engineering Immersive Program in Computer Software Engineering
Hack Reactor
Jan 2020 – Jan 2020

### Bachelor's degree in Business, Management, Marketing, and Related Support Services
National Technical University of Ukraine 'Kyiv Polytechnic Institute'​


## Contact & Social
- LinkedIn: https://linkedin.com/in/anna-kazannik

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Source: https://flows.cv/annakazannik
JSON Resume: https://flows.cv/annakazannik/resume.json
Last updated: 2026-04-01