Software Engineer Senior

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Stephen Solis-Reyes

Senior Software Engineer

716-***-**** ******************@*****.*** https://www.linkedin.com/in/stephen-solis-reyes-392715303 Summary

Senior Software Engineer for 8 years of experience, specializing in JavaScript, C#, React, .NET, Node.js and Python. Highly skilled in designing, building, and maintaining scalable web applications, with a strong focus on performance, user experience, and cutting-edge technologies. Proven ability to lead development teams, optimize codebases, and deliver high-quality software solutions. Skills

Frontend React Next.js React Native JavaScript TypeScript TailwindCSS MUI SCSS Backend

.NET .NET Core ASP.NET Node.js Nest Express GraphQL Microservices Python Django Serverless RESTful APIs RabbitMQ Apache Kafka Kubernetes AWS(Lambda, EC2, SQS, SNS, ECS) Azure(functions, Blob Storage, Web App, Virtual Machine) Database PostgreSQL MongoDB BigQuery MySQL Microsoft SQL Server MySQL Azure CosmosDB AWS DynamoDB AWS RDS Test Jest Cypress MSTest NUnit JUnit Selenium Cucumber PyUnit Pytest Others Docker Kubernetes Helm GitHub GitLab Web3 Solidity Ether.js Blockchain Scrum Agile Experience

iOPEX Technologies

Senior Software Engineer 05/2022 - 08/2024

Technologies: React, Next.js, React Native TypeScript, Nest.js, GraphQL, .NET, Node.js, PostgreSQL, AWS (EventBridge, ELB), Redis, Cypress, Tanstack Query, Prompt Engineering, LLM, Vertex, Helm, Docker, AWS Crafted a high-traffic SaaS platform leveraging React, Next.js, Nest.js, RESTful API, GraphQL, .NET and PostgreSQL to enhance performance for over 10k concurrent users.

Architected frontend, mentoring junior developers and guiding best practices developing and optimize frontend features for an internal application using React, TypeScript, GraphQL, Nest.js, Python and Django to improve performance and caching. Implemented real-time chat functionality and push notifications on a React Native mobile application, enhancing user engagement Built reusable NPM packages for styling, standardizing UI components across the application. Increased frontend test coverage with Cypress, ensuring robust, reliable code and streamlined testing processes. Collaborated in migrating Firestore to Postgres, focusing on frontend data flow improvements that contributed to a 25% speed increase. Introduced an AI-powered daily task summary feature using Vertex and Gemini, leading to a 30% boost in app usage. N-iX Location

Senior Frontend Engineer 02/2020 - 01/2022

Technologies: React, Next.js, D3.js, Chart.js, Redux, TypeScript, MUI, Auth0, JWT, .NET Core, ASP.NET Web API, Node.js, GraphQL, Apollo Federation, React Native, SQL, MongoDB, Microservices, Web3, Ether.js, Tatum, Alchemy, Docker, Kubernetes, Azure Developed complex data visualizations using real-time data, employing React, Next.js, D3.js, Chart.js, and Redux for dynamic, scalable interfaces. Developed iOS, Android trading application using React Native and was responsible for push notification implementation. Architected messaging solutions with RabbitMQ in microservices, enabling asynchronous processing leveraging Docker and Kubernetes to ensure scalability.

Proceeded PL/SQL and T-SQL packages, stored procedures, and triggers to facilitate complex backend business logic, streamlined application processes resulting in a 15% reduction of query execution time. Implemented both on-chain and off-chain transactions leveraging Ether.js, Web3.js, and Tatum SDK, ensuring secure and efficient blockchain interactions.

Designed and implemented an authentication workflow with Auth0 and JWT for secure user access and built Node.js and python microservices and webhooks to handle withdrawal and deposit processes. Increased frontend application maintainability and scalability by creating reusable components and a performant architecture.

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Experience

Blackstraw AI Location

Software Development Engineer 10/2017 - 01/2020

Technologies: Python, React, .NET, jQuery, WordPress, JavaScript (Front-end and Back-end), C#, Mobile and Web Development Developed backend microservices with C# .NET, ensuring high performance, reliability, and scalability for handling millions of requests per second.

Collaborated closely with cross-functional teams, integrating front-end Angular components with back-end .NET and Python services to provide seamless user experiences

Optimized existing APIs and built new RESTful services using C#, reducing response times by 30% and enhancing overall system performance Implemented complex data pipelines and machine learning models using Python, improving data processing efficiency and driving insights for key product decisions.

Re-engineered scalable web APIs and services using ASP.NET Core, C#, LINQ, asynchronous programming and pub/sub architecture, delivering efficient backend solutions.

Designed and deployed end-to-end solutions using Google Cloud Platform (GCP) services, including Cloud Functions, BigQuery, and Pub/Sub, streamlining data workflows and increasing automation. Education

Western University

Master of Science 09/2014 - 09/2017

Computer Science

Clark College

Bachelor of Science 09/2009 - 04/2014

Computer Science

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