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Jose Sieres

Jose Sieres

Senior Full-Stack Software Engineer

Austin, Texas, US
(786) 426-1236
English, Spanish

Background


About

About

Senior Full-Stack Engineer with 7+ years of experience designing, building, and optimizing high-scale systems across eCommerce, SaaS, and enterprise platforms. Proven record guiding technical direction, delivering large-scale product features, and mentoring teams to ship secure, performant, and maintainable software. Expert in TypeScript/JavaScript/Node.js, PHP, C#, .NET, Python, and SQL, with deep experience in modern testing frameworks (Jest, Mocha, Chai, Cypress) and A/B testing. Skilled at collaborating with product and design teams, influencing product strategy, and supporting the full engineering stack from API development to cloud infrastructure. Hands-on experience with Jira and Jira Align in Agile environments.

Work Experience

Work Experience

  • Senior Full-Stack Software Engineer, VShred

    Sep, 2024 - Present

    Design, build, and optimize high-scale systems supporting an international eCommerce and mobile ecosystem.

    • Designed and optimized high-scale distributed systems supporting millions of active users across eCommerce and mobile platforms.

    • Built internal developer tools (data seeding, AI-powered CLI queries, unit testing harnesses) that reduced engineering overhead by 20%+.

    • Revamped core platform modules, eliminating legacy bottlenecks and reducing page load times and API latency.

    • Achieved 100% test coverage across new features with Unit + Feature tests, ensuring zero regressions during releases.

    • Integrated Clickbank affiliate platform into production in under 2 months, unlocking a new revenue stream with minimal downtime.

    • Spearheaded development of a new mobile API, reaching full feature parity in under 3 months, supporting seamless app rollout.

    • Key contributor to Adaptus2, an Express.js (Node.js) framework powering modular APIs, real-time features, and clustered deployments.

    • Led the QA Automation team to prioritize testing for security, performance, and authentication/authorization flows.

    • Facilitated cross-functional collaboration across mobile, product, and infrastructure teams to streamline API adoption.

    • Authored architectural proposals that projected six-figure annual savings in hosting and maintenance.

    • Consistently delivered features on or ahead of schedule, ensuring predictable release cadence.

  • Senior Full-Stack Software Engineer, 

    Apr, 2021 - Apr, 20232 years

    • Founding team member; helped deliver version 1.0 to production in under 10 months, laying foundation for v2.0 scalability.

    • Built and maintained REST API integrations (Square, AWS S3, and more), powering payment, file, and content workflows.

    • Leveraged Node.js and Front-end Javascript Languages (React.js, Vue.js, etc.) to build a full-featured web platform serving a massive B2B SaaS Client base.

    • Developed core SPA modules in Vue.js, accelerating frontend delivery by 30%.

    • Prototyped and shipped the WYSIWYG Email Marketing module, enabling customer-driven campaign design.

    • Collaborated in Agile sprints to balance rapid iteration with technical sustainability.

  • Full-Stack Software Engineer, 

    Jan, 2020 - Jul, 20244 years 6 months

    • Delivered a production-ready Digital Signage SaaS solution in 8 months, deployed across multiple enterprise clients.

    • Modernized a legacy API by building new endpoints and retiring debt-laden ones, improving system reliability.

    • Partnered with stakeholders to refine requirements, ensuring sustainable and future-proof features.

    • Enhanced platform security by addressing penetration test findings ahead of schedule.

    • Contributed to UI modernization, improving customer satisfaction and usability.

    • Maintained Agile collaboration rhythms (SCRUM), supporting rapid feature delivery with low regression.

    • Designed and deployed a Python network agent bridging on-premise cinema equipment with REST APIs.

  • Development Team Manager / Scrum Master, 

    Jun, 2019 - Nov, 20195 months

    • Managed engineering team through organizational instability post-department walkout; stabilized operations in 5 months.

    • Leveraged Node.js and React.js to build a full-featured web platform serving a national network of locksmiths, team members, and customers.

    • Reintroduced Agile discipline, enforcing Scrum ceremonies and sprint hygiene.

    • Converted Tier-2 support tickets into prioritized backlog items, reducing tech debt exposure.

    • Coordinated QA/UAT testing cycles pre-release, improving release stability.

  • Senior Software Developer, 

    May, 2018 - Jun, 20191 year 1 month

    • Owned all technical initiatives across software and hardware for fintech operations.

    • Deployed a full-featured web platform serving loan origination and account management.

    • Led and mentored junior developers in modular, clean programming practices.

    • Optimized server resource usage, reducing infrastructure spend.

    • Built dynamic applications using HTML/CSS/JS/jQuery/PHP/MySQL, improving customer UX.

Projects Experience

Projects Experience

  • Adaptus2 Framework

    - Present

    Adaptus2 Framework — Node.js/Express API framework: modular server with dynamic routing and CRUD/proxy endpoints from external API config; supports MySQL/PostgreSQL with built-in hardening and error logging. Real-time & caching: WebSocket server for change notifications; Redis used for cache and Pub/Sub event broadcasting. GraphQL support: dedicated /graphql endpoint with dynamically generated schema/resolvers from API config. Plugin system & clustering: hot load/unload/reload plugins; cluster-wide sync and version checks over Redis channels. Security & performance: JWT auth, ACL middleware, Helmet, rate limiting, compression, and XSS/CSP protections. Ops & DX: socket-based admin CLI (token gen, config reload, route listing, plugin mgmt); flags for build/init/Swagger generation; graceful shutdown hooks. Optional modules: analytics endpoints, developer tools, chat/streaming, and ML/Ollama integrations.

Skills

Skills

  • Web Development

    TypeScript

    JavaScript

    HTML5

    CSS

    SCSS

    Sass

    ES6+

    ES2025

    Vue.js

    Node.js

    jQuery

    Laravel

    Lumen

    React

    React.js

    React Native

    Express.js

  • Programming Languages

    JavaScript

    PHP

    Python

    Java

    C++

    C#

    .NET

    C

  • Database Management

    MySQL

    PostgreSQL

    SQL

    Microsoft SQL Server

    Oracle Database

    SQLite

    MariaDB

    Amazon RDS

    Google Cloud SQL

    MongoDB

    Redis

    Cassandra

    Couchbase

    DynamoDB

    Firestore

    Snowflake

    Elasticsearch

  • Cloud Tools

    AWS Cloud Software

    AWS Services (S3, Lambda, EC2, ECS, Route53, and more)

    Rudderstack

    Klaviyo

    Clickbank

  • Testing Tools

    Jest

    Pest

    Chai

    Mocha

    Cypress

    Pytest

    Behave

  • Development Tools

    Git

    Docker

    Apache

    Nginx

    Unit Testing

    CircleCI

    Datadog

    Sentry

    Github Actions

    Jira

    Jira Align

  • Development Practices

    A/B Testing

    Documentation

    Product Strategy

    System Design

    Technical Direction

    Product Design

    Integrations

    API Development

  • Personal Strengths

    Willingness To Learn

    Numerical Analysis

    Integrations

    Quick Pivots

    Self Starter

    Team Player

    Reliable

Education

Education

  • Computer Science, AS, Miami Dade College

    Jan, 2013 - May, 2015

  • Computer Science, BS, Florida International University

    Sep, 2016 - May, 2020