Mid-Level Full-Stack Developer — Java and React

Mid-Level Full-Stack Developer — Java and React

Company: Avenue Eco
Employment Type: Full-time
Location: [Remote / Hybrid / Office Location]
Reports To: [Engineering Manager / Head of Engineering]

About Avenue Eco

Avenue Eco is building an AI-enabled business operations platform that brings workforce management, recruiting, project operations, commercial workflows, analytics, and intelligent automation into a connected product ecosystem. Our products include Engage for employee and workforce operations, Expand for recruiting and applicant tracking, and Exceedfor commission management. We are developing a secure, multi-tenant SaaS platform with shared data, configurable workflows, third-party integrations, operational reporting, and AI-assisted experiences that help organizations complete work rather than simply view information.

The Role

We are looking for a Mid-Level Full-Stack Developer with strong Java backend experience and practical React frontend expertise. You will work across the product stack to deliver production-ready features from detailed Agile stories, UI/UX designs, API contracts, and business requirements. The position is backend-oriented but requires the ability to implement complete user workflows in React, connect them to Java services, model data correctly, write automated tests, and support features through deployment and production monitoring.

You will contribute to capabilities such as employee lifecycle management, time and expense workflows, project management, commercial and billing operations, role-aware dashboards, recruiting automation, document workflows, third-party integrations, reporting, and AI-assisted operational experiences.

What We Expect from a Mid-Level Developer

This is not an entry-level position, but it also does not require the candidate to operate as the principal architect. The successful developer should be able to take a well-defined feature or Agile story, identify its technical dependencies, ask focused questions, propose a reasonable implementation, and deliver it with limited day-to-day supervision. The developer should understand how changes affect the user interface, APIs, data model, security, tests, integrations, and production operations—not simply complete an isolated coding task.

What Success Looks Like

Within the first several months, the developer should be able to:

• Understand the Avenue Eco product architecture, development standards, and core business domains.
• Independently deliver medium-sized Java and React features through development, testing, review, and deployment.
• Produce code that is secure, maintainable, observable, and supported by meaningful automated tests.
• Correctly implement tenant isolation, permissions, validation, audit history, and failure handling.
• Work effectively from detailed Agile stories and UI/UX specifications while identifying missing edge cases before development.
• Contribute constructively to code reviews, technical refinement, and improvements to engineering practices.
• Take ownership of production behavior and resolve defects rather than treating deployment as the end of the development process.

Engineering Principles

At Avenue Eco, we value developers who:

• Build for the complete user workflow, not only the immediate screen or endpoint.
• Prefer clear, maintainable solutions over unnecessary complexity.
• Treat security, tenant isolation, auditability, and testing as part of the feature rather than follow-up work.
• Understand the business reason behind a feature before implementing it.
• Reuse established components and architectural patterns instead of creating parallel solutions.
• Use AI development tools to accelerate delivery without delegating engineering judgment or code ownership.
• Communicate risks early, document important decisions, and collaborate openly with the broader product team.

Equal Opportunity

Avenue Eco is committed to building an inclusive team. Employment decisions are based on qualifications, experience, performance, and business requirements without discrimination based on legally protected characteristics.

Responsibilities

• Design, develop, test, and maintain backend services and APIs using Java and Spring Boot or a comparable Java framework.
• Build responsive, accessible, and reusable user interfaces using React, TypeScript, JavaScript, HTML, and CSS.
• Translate product requirements, Agile stories, acceptance criteria, Figma designs, and UI/UX storyboards into complete working features.
• Implement end-to-end CRUD workflows, including validation, search, filtering, pagination, permissions, audit history, loading states, empty states, and error recovery.
• Design and maintain MongoDB documents, relationships, indexes, queries, migration strategies, and tenant-scoped data access.
• Develop secure REST APIs and event-driven workflows with appropriate idempotency, retries, concurrency controls, and failure handling.
• Work with GCP services such as Cloud Run, Pub/Sub, Workflows, BigQuery, and Vertex AI, depending on the feature.
• Integrate Avenue Eco products with external platforms such as payroll providers, background-check services, Microsoft Teams and Microsoft Graph, communications providers, payment services, and other customer systems.
• Implement authentication and authorization using OAuth-based security, role-based access control, permission checks, and organization-level data isolation.
• Protect employee, candidate, salary, financial, and other sensitive information through appropriate access controls, audit logging, encryption practices, and separation of personally identifiable information.
• Write unit, component, integration, API, and end-to-end tests as appropriate for each feature.
• Participate in code reviews, technical design discussions, sprint planning, estimation, refinement, demonstrations, and retrospectives.
• Diagnose production issues using application logs, metrics, traces, alerts, and audit records.
• Improve performance, reliability, maintainability, and observability across existing services and user interfaces.
• Use AI-assisted development tools such as Windsurf responsibly while reviewing, validating, testing, and taking ownership of all generated code.
• Document APIs, data contracts, architectural decisions, configuration requirements, and operational procedures.
• Collaborate closely with product management, UX/UI design, QA, DevOps, and other engineers throughout the delivery lifecycle.

Required Qualifications

• Approximately 3–5 years of professional software-development experience, including meaningful ownership of production features.
• Strong proficiency in Java, object-oriented design, collections, exception handling, concurrency fundamentals, and modern Java development practices.
• Production experience building services with Spring Boot, Spring MVC, Spring Security, or a comparable Java application framework.
• Practical experience with React, component-based frontend development, hooks, state management, routing, forms, and API integration.
• Working knowledge of TypeScript, JavaScript, HTML, and CSS.
• Experience designing and consuming RESTful APIs using JSON.
• Experience with MongoDB or another document-oriented database, including data modeling, indexing, and query optimization.
• Understanding of CRUD design, domain validation, transactional boundaries, pagination, filtering, sorting, and auditability.
• Experience with Git-based development, pull requests, code reviews, branching practices, and automated CI/CD pipelines.
• Ability to write reliable unit and integration tests using tools such as JUnit, Mockito, React Testing Library, Playwright, Cypress, or equivalent technologies.
• Familiarity with containerized applications, cloud deployment, configuration management, and production troubleshooting.
• Understanding of authentication, authorization, tenant isolation, secure API design, and protection of sensitive data.
• Ability to work from detailed business rules while identifying incomplete requirements, edge cases, and potential implementation risks.
• Strong written and verbal communication skills and the ability to work effectively in an Agile product-development environment.

Preferred Qualifications

• Experience with Google Cloud Platform, particularly Cloud Run, Pub/Sub, Workflows, BigQuery, Secret Manager, Cloud Logging, or related services.
• Experience building multi-tenant B2B SaaS products.
• Familiarity with asynchronous processing, message-driven architecture, background jobs, webhooks, retries, dead-letter handling, and idempotent integrations.
• Experience with Redis for caching, coordination, or short-lived operational data.
• Familiarity with analytics and semantic-layer technologies such as Cube and visualizationlibraries such as Apache ECharts.
• Experience integrating with external payroll, HR, recruiting, financial, identity, communication, or collaboration platforms.
• Familiarity with AI and LLM integrations, including Vertex AI, agent frameworks, retrieval workflows, structured model outputs, tool calling, or MCP-based services.
• Understanding of human-in-the-loop AI workflows, policy-controlled automation, prompt evaluation, and auditability of AI-generated outputs.
• Experience implementing perational dashboards, approval queues, notification systems, workflow engines, and role-aware user experiences.
• Familiarity with Figma, design systems, responsive layouts, and WCAG accessibility practices.
• Experience with observability tools and practices, including structured logging, metrics, distributed racing, alerting, and production health monitoring.
• Previous experience with HR technology, applicant tracking systems, project operations, time tracking, commercial billing, payroll integrations, or financial software is helpful but not required.