Senior Java Full-Stack Developer

Senior Java Full-Stack Developer

Employment Type: Full-time
Locations: Pittsburgh, PA 

We are seeking a Senior Java Full-Stack Developer to 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.

• 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

• 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

• 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)

• 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)

• 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

• 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

• Java 17+

• Spring Boot 3.x

• Microservices architecture

• RESTful API design

• Oracle Database (SQL, PL/SQL, tuning, indexing)

• MongoDB (NoSQL modeling, aggregation framework)

• Angular (v14+)

• TypeScript, RxJS

• State management (NgRx or equivalent)

• Event streaming experience with Apache Kafka (Producers, Consumers, Kafka Streams)

• Experience with message brokers such as IBM MQ or RabbitMQ

• Exposure to large-scale, high-throughput transactional systems

• 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

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.