Java Full Stack Developer (Senior)

Techstra Solutions•Pittsburgh/Dallas, TX

20h•Onsite

About The Position

The Senior Java Full-Stack Developer will lead the design and development of scalable, high-concurrency microservices. This is a hands-on, full-stack role leveraging Java 17+ and Spring Boot on the backend and Angular on the frontend. The ideal candidate has strong experience operating in complex, distributed data environments, with deep expertise in Oracle and MongoDB, ensuring data integrity, performance, and consistency across systems.

Requirements

Backend Java 17+
Spring Boot 3.x
Microservices architecture
RESTful API design
Databases Oracle Database (SQL, PL/SQL, tuning, indexing)
MongoDB (NoSQL modeling, aggregation framework)
Frontend Angular (v14+)
TypeScript, RxJS
State management (NgRx or equivalent)
Skills State management (NgRx or equivalent)
Strong architectural and problem-solving mindset
Comfortable working in high-concurrency, distributed environments
Effective mentor and collaborator
Ownership-driven with attention to performance, security, and quality

Responsibilities

Architecture & Design Lead the architectural design of new microservices, ensuring solutions are loosely coupled, resilient, and highly available
Apply modern microservices patterns, including service discovery, API gateways, and circuit breakers
Influence platform standards, design patterns, and engineering best practices
Full-Stack Delivery Develop end-to-end features from Angular UI through backend services to persistence layers
Build and consume secure RESTful APIs with standardized validation and error handling
Collaborate with product, UX, and backend teams to deliver high-quality solutions
Backend Engineering (Java & Spring) Build high-performance services using Java 17+, leveraging modern language features such as: Records Sealed Classes Pattern Matching Stream API
Develop services using Spring Boot 3.x and the Spring ecosystem: Spring Web Spring Data JPA / MongoDB Spring Security Spring Cloud
Design and deploy distributed microservices using resiliency patterns (Resilience4j)
Database & Data Management Design and optimize Oracle database interactions, including: Advanced SQL and PL/SQL Performance tuning and indexing strategies Complex relational mappings
Build and optimize MongoDB data models, aggregations, and document versioning patterns
Implement data consistency strategies across polyglot persistence environments (e.g. Saga, Transactional Outbox)
Frontend Engineering Build responsive, component-based UIs using Angular (v14+), TypeScript, RxJS, and Angular Signals
Implement state management using NgRx or lightweight state services
Ensure seamless integration between frontend and backend services
Performance, Quality & Security Identify and remediate performance bottlenecks in Java code and database queries
Conduct rigorous code reviews and mentor junior and mid-level engineers
Implement robust security protocols, including: OAuth2 OpenID Connect (OIDC) JWT-based authentication and authorization