Full Stack JavaScript Web Application Developer (Ref: 5884)

Estrada Consulting, Inc; Sacramento (CA); Remote; USD 120,000 - 160,000; Full time

Job summary

Estrada Consulting, Inc. is seeking a Senior Software Engineer to design, develop, and maintain mission-critical web applications for a California public-sector client. You will build full-stack features, including UI, APIs, and database integrations, while ensuring performance and security.

You will work with Oracle/MS SQL Server, MongoDB, and modern JS frameworks, delivering complex queries and data-driven reporting. Remote-US hours apply, Pacific Time coordination is expected.

Qualifications

• MQ1. 4+ years building mission-critical, user-friendly, high-performance web apps.
• MQ2. 4+ years developing web-based solutions.
• MQ3. 4+ years debugging and edge-case testing (full stack).
• MQ4. 4+ years executing complex Oracle/MS SQL Server queries for data conversion, analysis, reporting.
• MQ5. 3+ years with JavaScript/TypeScript, Azure DevOps/GitHub, VueJS/React/Angular, HTML/CSS.

Responsibilities

• Design, develop, and maintain secure, high-performance web apps.
• Implement full-stack functionality: UI, APIs, and DB integrations.
• Integrate apps with existing enterprise systems and data sources.
• Write complex SQL queries for data conversion and reporting.
• Troubleshoot code and perform edge-case testing per user stories.
• Implement configurable business rules, calculations, and validation.
• Support UAT, defect resolution, and enhancements.
• Prepare technical docs and collaborate with stakeholders.

Skills

JavaScript

TypeScript

VueJS

React

Angular

HTML

CSS

REST APIs

SQL

Azure DevOps/GitHub

Node.js

Tools

Oracle SQL

Microsoft SQL Server

MongoDB

Fastify

ExpressJS

FeathersJS

VS Code

Docker

Linux

Job description

Senior Software Engineer – Full Stack JavaScript Web Application Developer (Ref: 5884)

Location: Remote – United States Only
Position Type: Full-Time Contract
Duration: 12 Months, with Possible 12-Month Extension
Work Hours: Monday–Friday, 8:00 AM–5:00 PM Pacific Time

Position Overview

Estrada Consulting, Inc. is seeking an experienced Senior Software Engineer to design, develop, maintain, and enhance mission-critical web applications for a California public-sector client.

The consultant will support the development of custom web-based solutions, system integrations, database operations, business rules and calculations, testing, and technical documentation.

Key Responsibilities

• Design, develop, and maintain secure, user-friendly, high-performance web applications.
• Develop full-stack functionality, including user interfaces, APIs, and database integrations.
• Integrate applications with existing enterprise systems and data sources.
• Develop complex SQL queries for data conversion, analysis, and reporting.
• Troubleshoot application code and perform edge-case testing based on user requirements.
• Implement configurable business rules, calculations, and data validation processes.
• Support user acceptance testing, defect resolution, and application enhancements.
• Prepare technical documentation and collaborate with technical and business stakeholders.

Mandatory Qualifications

MQ1. Minimum four (4) years of demonstrated experience developing and maintaining solutions that:

• Serve mission-critical applications.
• Are intuitive and user-friendly, requiring little formal training, with features such as online training, on-screen help, and decentralized account management.
• Are performance-oriented for fast response.

MQ2. Minimum four (4) years of experience developing and maintaining web-based solutions.

MQ3. Minimum four (4) years of experience troubleshooting code and performing edge testing based on user requirements/stories (full stack).

MQ4. Minimum four (4) years of experience performing complex database queries in Oracle/MS SQL Server for data conversion, data analysis, and visual reporting.

MQ5. Minimum three (3) years of experience with one or more of the following:

• JavaScript, TypeScript.
• Azure DevOps/GitHub.
• VueJS, React, Angular.
• HTML and CSS.

MQ6. Minimum three (3) years of experience with one or more of the following:

• Oracle SQL.
• Microsoft SQL Server.
• MongoDB.
• REST APIs.
• Functions, triggers, and stored procedures.

Desirable Qualifications

• DQ1. Experience integrating PCI-DSS-compliant payment portals into web applications.
• DQ2. Experience using Composition API in VueJS.
• DQ3. Experience with MongoDB, Fastify, ExpressJS, or FeathersJS.
• DQ4. Experience creating MongoDB Aggregation Pipelines with multiple stages.
• DQ5. Familiarity with Linux and Docker images for local development.
• DQ6. Experience with Vuetify or PrimeVue third-party component libraries.
• DQ7. Experience using JavaScript libraries such as PDFMake to create PDF reports.
• DQ8. Experience using Oracle SQL Developer or Microsoft SQL Server Management Studio.
• DQ9. Experience using Visual Studio Code (VSCode).

Additional Requirements

• Must reside and perform all remote work within the United States.
• Must be available during Pacific Time business hours.
• Must successfully complete required background screening and onboarding procedures.
• Must provide verifiable professional references.