Temporary Full Stack React Developer Jobs in Pennsylvania

At BBH, Partnership is more than a form of ownership-it's our approach to business and relationships. We know that supporting your professional and personal goals is the best way to help our clients and advance our business. We take that responsibility seriously. With a 200-year legacy and a shared passion for what's next, this is the right place to build a fulfilling career.

We are looking for an experienced Full Stack Developer to join our Ai Lab team, with a strong focus on AIdriven, building re-usable, scalable and platform oriented solutions. This role is ideal for a senior engineer who wants to remain handson while also having a real influence on technical direction, quality, and team growth.

As a Full Stack Developer, you will play a key role in building and evolving applications, contributing to architectural decisions, and supporting less experienced engineers through mentoring and technical guidance. You will work closely with crossfunctional teams, including Product Owners, Data Scientists, and Business Stakeholders, to ensure solutions deliver real business value.

Key Responsibilities

• Design, develop, and maintain highquality Java/Pythonbased applications in a complex, distributed environment.
• Proficiency in modern front-end frameworks (React, Angular) and back-end technologies (Python, Java/Spring Boot, Node.js) to build scalable, end-to-end applications.
• Build in a micro-services architecture
• Contribute to AIenabled and datadriven solutions, working closely with data and product teams.
• Take ownership of features from requirements analysis through implementation, deployment, and production support.
• Participate in technical design and architecture discussions, influencing solutions and best practices.
• Perform code reviews and promote clean code, scalability, and maintainability.
• Act as a technical mentor for less experienced developers, sharing knowledge and setting development standards.
• Support application evolution by driving feature enhancements and technical improvements.
• Work with CI/CD pipelines and deployment processes to ensure reliable delivery.
• Troubleshoot, debug, and resolve complex issues in existing applications.
• Collaborate effectively in Agile, distributed teams (Scrum / Kanban).
• Familiarity with Retrieval-Augmented Generation patterns, embedding models, vector databases, and semantic search techniques to ground AI outputs in enterprise content.
• Experience of building Agentic applications in enterprise platforms.
• Experience working with large language models and exposure to agentic AI frameworks (e.g., LangChain, LangGraph, CrewAI) for building multi-step, tool-augmented workflows and autonomous AI agents
• Communicate clearly with stakeholders, helping translate technical topics into understandable outcomes and impacts.

Technical Scope

• Core Java development
• Python Development
• Spring ecosystem: Spring MVC, Spring Data, Spring Security
• Web applications using Angular, TypeScript, RxJS, HTML, CSS
• SQL and NoSQL databases, with a strong focus on data modeling and performance
• Messaging queues and asynchronous processing
• Cloud development on OpenShift
• CI/CD pipelines and deployment automation
• Unix/Linux environments
• Agentic Frameworks (langchain, Langgraph, etc)

Required Experience

• 3-4+ years of handson Java development experience
• Strong experience with Spring and enterprisegrade backend systems
• Experience of building Agentic AI applications
• Experience in building enterprise grade solutions in Python
• Solid understanding of design patterns and scalable architecture principles
• Experience with SQL and NoSQL databases and optimization techniques
• Experience with messaging systems
• Handson experience with Azure cloud services
• Experience working in Agile environments
• Strong problemsolving skills and ability to proactively identify risks
• High attention to code quality, reliability, and accuracy

Leadership & Soft Skills

• Natural leadership mindset with the ability tosupport other developers
• Very good command of English (spoken and written)
• Strong communication skills and ability to collaborate with Product, Project Management, and senior stakeholders
• Analytical thinking and structured problemsolving approach
• Ability to prioritize tasks and manage delivery effectively
• Teamoriented attitude with a sense of ownership and accountability

We value diverse experiences. We value diverse experiences and transferrable skillsets. If your career hasn't followed a traditional path, includes alternative experiences, or doesn't meet every qualification or skill listed in the job description, please do go ahead and apply.

About BBH:

Brown Brothers Harriman (BBH) is a premier global financial services firm, known for premium service, specialist expertise, technology solutions and partnership approach to client management. Across Investor Services and Capital Partners, we work with an enviable roster of sophisticated clients who make BBH their first call when they are tackling their hardest challenges. Delivering for our clients and each other energizes us.

We believe that how we do our work is just as important as what we do. We are relentless problem solvers who know our best ideas come from collective debate and development-so we are never possessive about our ideas. Every day we come together as a diverse community of smart and caring people to deliver exceptional service and expert advice-creating success that lasts. No matter where you sit in the organization, everyone is empowered to contribute their ideas. BBHers can pick up the phone and call any colleague, and they are happy to help. Expanding your impact beyond your daily role is part of how we operate as trusted partners to one another.

We believe stability is a competitive advantage, but being stable means having the knowledge, skill, and discipline to evolve, often-pushing the boundaries of innovation. As a private partnership, every investment we make is in the relationships, technologies, products and development we believe are in the long-term interests of our clients and our people. Our long-tenured leaders are experts in their areas and are actively involved in the day-to day business, taking the time to provide guidance and mentoring to build the next generation of BBHers. Because we know, our success begins with yours.

Go to BBH.com to learn more about our rewards and benefits, philanthropy, approach to sustainability or how we support you to thrive personally, physically and financially.