Java Full Stack Developer (Senior)

Senior Java Full Stack Developer
Employment Type: Full-Time
Locations: Pittsburgh, PA
Work Model: On-Site 5 Days Per Week

Role Overview
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. Key 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

Required Qualifications
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

About Techstra Solutions
Techstra Solutions helps leading organizations unlock the value of Digital and Talent Transformation. We combine business strategy, technology, and talent to guide clients through complex transformation journeys—from strategy through execution. We deliver our expertise through consulting, innovative staffing solutions, and software development, always focused on measurable outcomes and long-term impact.

Equal Employment Opportunity Statement

Techstra Solutions is an equal opportunity employer. The Company makes its decisions on merit, and its policy of equal opportunity prohibits discrimination in all phases of the employment process, including, but not limited to, recruitment, hiring, promotion, selection, transfer, demotion, layoff, termination, compensation, benefits, and other terms and conditions of employment. The policy of equal opportunity applies without regard to race, color, creed, religion, gender,, sexual orientation, gender identification, pregnancy, marital status, national origin, ancestry, age, disability that can reasonably be accommodated without undue hardship, military status, veteran status, genetic predisposition or carrier status, alienage or citizenship, domestic partnership status, arrest or conviction record, status as a victim of domestic violence, or any other protected categories under federal, state, or local law. The Company also prohibits discrimination or harassment based upon the perception that a person has, or is associated with a person who has, any of these characteristics.