Javascript Backend Developer Jobs in Fairfield, NJ

About this role

About this Role:
At BlackRock, technology is the foundation of our business. As an Backend Engineer, you'll build resilient systems that power our global post-trade operations. You'll design and deliver enterprise-scale software with a focus on reliability, performance, and clean engineering practices.
This role is ideal for engineers who like to innovate and solve complex challenges while fostering a culture of excellence and continuous improvement.

About Post Trade Accounting (PTA):

• A major strategic area within Aladdin and one of BlackRock's largest engineering investments.
• Responsible for the systems that ensure accurate, scalable, and efficient accounting across global operations.
• Expanding into data analytics and pipeline initiatives using Snowflake, Redis, and Kafka to manage high-volume, real-time data.
• Collaborates closely with Product, Operations, and other Engineering teams to deliver business-critical capabilities.
• Agile and collaborative environment that values technical depth, quality, and innovation.

Key Responsibilities:

• Design and develop robust, high-performance back-end systems using Java 11+ and the Spring Boot ecosystem.
• Take active part in design discussions, code reviews, and architecture sessions with a hands-on approach.
• Build and maintain microservices and event-driven systems to process and distribute large-scale financial data.
• Develop data integration and pipeline components that connect systems across Snowflake, SQL Server, and real-time streaming platforms.
• Implement and optimize Redis-based caching and data stores for low-latency access patterns.
• Contribute end-to-end; when needed, take on lightweight UI updates, leveraging AI-assisted coding tools and support from front-end teammates.
• Champion best practices for code quality, testing, automation, and performance tuning.
• Elevate technical craftsmanship, problem-solving, and design thinking skills.
• Collaborate cross-functionally to ensure technical solutions align with product goals and business outcomes.

Qualifications / Competencies:

• B.S./M.S. in Computer Science, Engineering, or related discipline.
• 4+ years of professional experience in Java and object-oriented design.
• Strong knowledge of Spring Boot, REST APIs, and enterprise integration patterns.
• Deep expertise in SQL Server, including stored procedures, performance tuning, and data modeling.
• Experience with Redis for caching or data persistence.
• Hands-on exposure to Kafka or similar publish-subscribe systems for real-time event processing.
• Familiarity with Snowflake and data pipeline concepts (ETL, batch vs. streaming).
• Familiarity with Front End technologies (Angular or React; JavaScript/TypeScript; HTML/CSS) is preferred.
• Experience with Agentic coding and general understanding of how LLMs are working
• Strong focus on clean architecture, maintainability, and production readiness.
• Excellent communication

Nice to Have:

• Experience with Kubernetes, Docker, or cloud-native environments (AWS/GCP).
• Exposure to observability tools (Prometheus, Grafana, Open Telemetry).
• Scripting experience in Python for automation or data analysis.
• Exposure to Prompt Engineering and Agentic AI
• Interest in financial systems, accounting, or investment technology.

For New York, NY Only the salary range for this position is USD$132,500.00 - USD$162,000.00 . Additionally, employees are eligible for an annual discretionary bonus, and benefits including healthcare, leave benefits, and retirement benefits. BlackRock operates a pay-for-performance compensation philosophy and your total compensation may vary based on role, location, and firm, department and individual performance.

Our benefits
To help you stay energized, engaged and inspired, we offer a wide range of benefits including a strong retirement plan, tuition reimbursement, comprehensive healthcare, support for working parents and Flexible Time Off (FTO) so you can relax, recharge and be there for the people you care about.

Our hybrid work model

BlackRock's hybrid work model is designed to enable a culture of collaboration and apprenticeship that enriches the experience of our employees, while supporting flexibility for all. Employees are currently required to work at least 4 days in the office per week, with the flexibility to work from home 1 day a week. Some business groups may require more time in the office due to their roles and responsibilities. We remain focused on increasing the impactful moments that arise when we work together in person - aligned with our commitment to performance and innovation. As a new joiner, you can count on this hybrid model to accelerate your learning and onboarding experience here at BlackRock.

Guidance on AI use for candidates

At BlackRock, AI has long been part of how we work - enhancing decision-making, improving operations, and helping us deliver better outcomes for clients. We encourage candidates to use AI thoughtfully to learn, prepare, and work more effectively; but during our interview process, we want to focus on getting to know you through your own experiences, thinking, and judgment. To support you, we've provided guidanceon when and how to use AI during our hiring process so you can approach each step with confidence and showcase your best self.

About BlackRock

At BlackRock, we are all connected by one mission: to help more and more people experience financial well-being. Our clients, and the people they serve, are saving for retirement, paying for their children's educations, buying homes and starting businesses. Their investments also help to strengthen the global economy: support businesses small and large; finance infrastructure projects that connect and power cities; and facilitate innovations that drive progress.

This mission would not be possible without our smartest investment - the one we make in our employees. It's why we're dedicated to creating an environment where our colleagues feel welcomed, valued and supported with networks, benefits and development opportunities to help them thrive.

To learn more about BlackRock, please visit Careers.BlackRock.com. We also encourage you to get to know us on LinkedIn, Instagram, YouTube, X, and TikTok.

BlackRock is proud to be an equal opportunity workplace. We are committed to equal employment opportunity to all applicants and existing employees, and we evaluate qualified applicants without regard to race, creed, color, national origin, sex (including pregnancy and gender identity/expression), sexual orientation, age, ancestry, physical or mental disability, marital status, political affiliation, religion, citizenship status, genetic information, veteran status, or any other basis protected under applicable federal, state, or local law.View theEEOC's Know Your Rights poster and its supplementand thepay transparency statement.

BlackRock is committed to full inclusion of all qualified individuals and to providing reasonable accommodations or job modifications for individuals with disabilities. If reasonable accommodation/adjustments are needed throughout the employment process, please email Disability.Assistance@blackrock.com. All requests are treated in line with ourprivacy policy.

BlackRock will consider for employment qualified applicants with arrest or conviction records in a manner consistent with the requirements of the law, including any applicable fair chance law.