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■ Senior Software Engineer

Viktor
Zavala

Full Stack Engineer with 13+ years of experience designing and building scalable web applications and developer platforms. Passionate about modern frontend architecture, engineering excellence, and delivering software that creates lasting impact.

zavala.viktor@gmail.com github.com/ZSnake linkedin.com/in/vkzavala

Proficiency

Product Engineering
Frontend Architecture
Developer Experience
Quality Engineering
Cloud Infrastructure
AI Engineering

■ Work Experience

Senior Software Engineer JWX

11/2023 — Present
  • Own and evolve the frontend platform across approximately 10 repositories, including the design system, API communication layer, shared developer utilities, navigation, routing, testing infrastructure, and core dashboard architecture.
  • Support a shared frontend ecosystem used by approximately 30 frontend engineers and 20 QA engineers, establishing reusable abstractions and tooling that standardize development across product teams.
  • Contributed to the migration of approximately 1,500 end-to-end test cases from WebDriverIO to Playwright, improving execution speed, reducing flakiness, and making test runs more consistent and maintainable.
  • Introduced pull-request-level tests for critical user flows, adding earlier regression protection and increasing confidence in frontend changes before they reach the main test pipeline.
  • Led a complete frontend design-system migration encompassing approximately 40 components, modernizing the dashboard’s visual foundation and replacing the legacy component library across the product.
  • Delivered the frontend migration from API v1 to v2 while also helping evolve the shared API communication library from v1 to v2, enabling the dashboard to adopt the new service interfaces across multiple repositories.

Software Development Engineer Amazon

12/2021 — 11/2023
  • Served as the sole frontend engineer responsible for delivering the Amazon RDS Console experience for the limited-preview launch of Amazon Aurora Limitless Database.
  • Designed and implemented the complete visual workflow for creating and managing Aurora Limitless databases, making the new capability accessible through the AWS Management Console without requiring customers to rely exclusively on programmatic tooling.
  • Coordinated frontend delivery across the Aurora service, product management, UX design, technical writing, AWS CLI, CloudFormation, and SDK teams, aligning the console experience with parallel implementations across the AWS ecosystem.
  • Translated complex distributed-database concepts and service APIs into customer-facing workflows for a database product designed to process millions of write transactions per second and manage petabytes of data. AWS announcement
  • Established the frontend architecture and implementation approach for the initiative, owning delivery from early product and design collaboration through console integration and launch.

Senior Frontend Engineer Coolblue

08/2019 — 12/2021
  • Delivered homepage, search, navigation, category, and product-discovery experiences for an e-commerce platform serving approximately 2 million active customers across the Netherlands and Belgium.
  • Helped establish the frontend and localization foundations used to launch Coolblue in Germany, extending the platform’s multilingual product-discovery capabilities into a new market.
  • Architected approximately 10 internal content and merchandising applications, including systems for translations, homepage management, advertising placements, and custom category pages.
  • Built a token-based localization system and more than 20 reusable content blocks, reducing duplicate translation work and accelerating the creation of multilingual advice, promotional, and category content.
  • Completed the removal of jQuery from the frontend, reducing the JavaScript bundle by approximately 80 KB while collaborating with roughly 20 engineers on broader platform modernization.

Senior Frontend Engineer Modus Create

02/2018 — 08/2019
  • 02/2018 — 08/2019 (Part-time: 02/2018–05/2018)
  • Contributed to full platform rewrites for Hobsons and Pfizer, replacing legacy interfaces with modern React applications and component-based frontend architecture.
  • Rebuilt the Hobsons Intersect UI as part of an approximately 10-person team, improving performance, test coverage, usability, and visual design while delivering against a fixed client deadline.
  • Helped modernize a product connected to Hobsons’ education ecosystem, which served more than 13 million students across over 13,000 schools.
  • Published a technical article on browser rendering and practical frontend performance optimization: “The Amazing World of Browser Performance”.

Development Manager Acklen Avenue

04/2017 — 05/2018
  • Established the company’s first formal engineering-management function after joining as its first developer and helping the organization grow to more than 25 engineers.
  • Directly managed 25+ software engineers across multiple client teams, providing performance feedback, technical guidance, and career-development support.
  • Created a company-wide career-progression framework defining engineering levels, role expectations, competencies, and advancement criteria.
  • Replaced ad hoc compensation and promotion decisions with a structured evaluation process, improving consistency and career clarity across the engineering organization.

Senior Full Stack Engineer Acklen Avenue

04/2015 — 04/2017
  • Owned application architecture and delivery for more than 10 predominantly greenfield client projects, taking products from initial requirements through production.
  • Led technical delivery within cross-functional healthcare teams spanning engineering, QA, product ownership, business analysis, and client engagement.
  • Built full-stack applications with Node.js, C#, .NET, Angular, and React while contributing to company-wide architecture standards and applying SOLID and test-driven development practices.
  • Mentored junior engineers through code reviews, pair programming, and day-to-day architectural guidance.

Full Stack Engineer Acklen Avenue

08/2012 — 04/2015
  • Joined as Acklen Avenue’s first software developer and helped establish engineering practices that supported the organization’s growth to more than 25 engineers.
  • Built greenfield web applications for clients across multiple industries using full-stack JavaScript and .NET technologies.
  • Applied test-driven development, pair programming, code review, and Agile practices to deliver maintainable software and spread engineering knowledge.
  • Advanced from Full-Stack Engineer to Senior Full-Stack Engineer and then Development Manager during five years of company growth.

■ Projects

Trigrow Systems - IoT Platform

 12/2016 — 12/2018

Web-based platform for monitoring and automating commercial cannabis cultivation environments. Defined the frontend architecture and helped build the application using Vue.js, integrating with a ColdFusion backend to provide growers with tools for monitoring environmental conditions, cultivation operations, and facility performance.

ORE ID - Blockchain Authentication Platform

 04/2021 - 12/2021

Developed key frontend tooling for ORE ID, a blockchain authentication and wallet platform, including its React web application, reusable component library, and JavaScript SDK, enabling developers to integrate OAuth-based authentication, blockchain account management, and transaction signing into their applications.

Cardata Mobile - Vehicle Reimbursement Platform

 05/2022 - 06/2023

Mobile application for Cardata’s vehicle reimbursement platform, enabling employees to automatically track business mileage, manage trips, monitor compliance, and view reimbursements. Helped rewrite and modernize the existing mobile application using React Native, contributing to its architecture and development across iOS and Android.

Maymont Homes - Real Estate Investment Platform

 06/2023 - 06/2024

Helped build Maymont Homes’ internal real estate investment and property research platform using React and TypeScript, developing data-rich interfaces and tooling used to evaluate properties, markets, and potential acquisitions.

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