Senior Software Engineer - Full Stack; React+Java) REQ_

Senior Software Engineer - Full Stack (React+Java)  Remote
- United States of America Remote, United States of America Remote, United States Employee Regular

Job Description

3

Pillar is an AI transformation partner on a mission to help enterprises build the AI-native products and intelligent agents that will define the next era of business. With teams across North America, Europe, Latin America, and Asia, we work with the most ambitious companies in financial services, healthcare, media, and technology — helping them move faster, modernize boldly, and compete on their own terms.

Our HelixAI platform and Helix Pods delivery model put our engineers at the center of real agentic transformation — doing work that is open, portable, and built to last. We are building the future of enterprise AI.

Elevate your expertise to new heights at 3

Pillar, the premier destination for trailblazing senior software engineers like yourself. On the Avalon engagement, you'll help build and evolve a modern full-stack platform — React 19 on the frontend and Java 25 with Spring Boot 4 on the backend — working alongside industry leaders to deliver transformative solutions for the business.

Your role extends beyond the realm of code composition; you will architect solutions that reshape how Avalon's teams and customers work. Join us and spearhead the charge toward a tech future that transcends the ordinary.

Facilitate effective communication with client project stakeholders regarding project status and recommendations.

Craft client code that is efficient, performant, testable, scalable, secure, and of the highest quality.

Actively participate in accurate planning and estimation efforts, utilizing project methods and tools.

Proficiently gather requirements and organize/present developed features for clients.

Execute complex activities within the current methodology and quality standards, showcasing success across diverse engagements.

Promote client success across the team by collaborating with engineers, designers, and managers to understand user pain points, anticipate potential problems, and iterate on solutions that drive client success.

Engage in agile software development, including daily stand-ups, sprint planning, team retrospectives, and other governance activities.

Actively participate in the Engineering Practice community, mentoring others through Communities of Practice (CoPs) or on project teams and supporting the growth of technical capabilities.

Independently drive project delivery within defined architecture, demonstrating autonomy and accountability in all stages from conceptualization to deployment.

Use AI-assisted development tools (Git Hub Copilot) and specification-driven practices (Open Spec) responsibly, ensuring all AI-generated suggestions are reviewed, tested, and approved before merging or deploying.

A minimum of 5+ years of experience/expertise in the following areas:

Vite for development and production builds

Material UI (MUI), MUI Data Grid, and Emotion for components and styling

Redux Toolkit and React Redux for shared application state

React Context for user and feature-flag information

Axios for communication with backend REST APIs

Okta React and Okta Auth JS for authentication

Vitest and React Testing Library for unit and component testing

ESLint and Prettier for code quality and formatting

Husky and lint-staged for pre-commit validation

Nginx for serving the production UI

Spring Boot 4

Spring Web MVC for REST API development

Spring Data JPA and Hibernate for persistence

Microsoft SQL Server as the production database

H2 in SQL Server compatibility mode for automated tests

Okta OAuth 2.0 and Spring Security for authentication and…