Haystack
← Back to Jobs
Technology

Senior Java Full Stack Developer- Principal Level Individual Contributor

Sincera Technologies, Inc.Westlake, TX🇺🇸United StatesPosted 28 Jul 2026

Quick Overview

Work Type
Hybrid
Level
Leader

Job Description

Job Summary

We are seeking an exceptionally skilled Senior Java Full Stack Developer with 12+ years of enterprise software engineering experience to serve as a high-impact Individual Contributor (IC). In this role, you will take end-to-end ownership of designing, building, and deploying scalable microservices, resilient REST APIs, and modern frontend interfaces on Microsoft Azure.

As a principal-level IC, you will operate with high autonomy, solving complex architectural and performance challenges while translating intricate business requirements into clean, production-grade code. Excellent verbal and written communication skills are essential, as you will directly collaborate with product managers, system architects, and business stakeholders.

Key Responsibilities

  • Hands-on Full Stack Engineering: Design, build, and maintain high-performance, fault-tolerant microservices and responsive frontend components from end to end.
  • Backend & API Architecture: Develop clean, secure RESTful APIs using Java (Java 11/17+) and Spring Boot,
    • Familiarity with Kafka or Azure Event Hubs for event-driven processing.
  • Cloud Native Deployment: Leverage Azure components (e.g., Azure App Services, Azure Functions, Azure Kubernetes Service, Azure Service Bus, Azure Key Vault) to deploy, run, and scale applications.
  • Database Design & Optimization: Write, tune, and maintain complex SQL queries, stored procedures, schema migrations, and indexing strategies (using Oracle,PostgreSQL).
  • Technical Ownership: Work as a self-driven Individual Contributor taking direct accountability for feature delivery, system performance, code quality, and production stability.
  • Cross-Functional Collaboration: Articulate technical concepts clearly to non-technical stakeholders, collaborate closely with Product Owners, and actively participate in architecture reviews and sprint planning.
  • DevOps & Quality Assurance: Implement robust unit/integration tests (JUnit, Mockito) and contribute to automated CI/CD pipelines (Azure DevOps / GitHub Actions).

Required Qualifications & Skills

  • Experience: 12+ years of hands-on software development experience building enterprise-grade applications.
  • Core Java & Frameworks: Deep expertise in Java (Java 8/11/17+), Spring Framework (Spring Boot, Spring Data, Spring Security, Spring Cloud).
  • Microservices & REST APIs: Extensive experience designing, developing, and decoupling monolithic applications into distributed, event-driven Microservices using REST APIs.
  • Cloud Infrastructure (Azure): Proven hands-on experience working with Microsoft Azure services (Azure App Services, Blob Storage, Azure SQL / Cosmos DB, Service Bus, Azure DevOps).
  • Database & SQL: Strong proficiency in relational databases, advanced SQL query optimization, transaction management, and ORM frameworks (Hibernate / JPA).
  • Frontend Basics / Full Stack: Proficiency with modern frontend technologies (TypeScript, React.js, Angular, or Vue.js) to build or integrate full-stack UI workflows.
  • Autonomy & Impact: Demonstrated track record as a top-tier Individual Contributor who thrives without micro-management.
  • Communication Skills: Exceptional oral and written communication skills with the ability to lead technical discussions, document system designs, and influence technical direction.

Preferred Qualifications

  • Hands-on experience with containerization technologies (Docker, Kubernetes / AKS).
  • Experience implementing OAuth2, OpenID Connect, and API Gateway security protocols.
  • Knowledge of TDD (Test-Driven Development) and automated testing frameworks.

Skills

Docker
Microservices
Oracle
SQL
Spring
Spring Boot
API Gateway
TDD
Angular
Azure
GitHub Actions
Hibernate
JUnit
Java
Kafka
Kubernetes
PostgreSQL
REST
React
TypeScript
Vault
Vue

Similar jobs