Senior Backend Engineer (Java/Spring) — AI-Driven, Onsite NY

MoneyLion; New York (NY); On-site; USD 168,000 - 190,000; Full time

Benefits offered by this job

401(k) match

Health insurance

Disability coverage

Life insurance

Unlimited PTO

Job summary

Engine by Gen in New York, NY is seeking a Senior Backend Engineer (Java/Spring) to build the services behind our financial products marketplace. You’ll own critical backend systems, design clean REST contracts, and shape scalable architectures with a bias for quality and reliability.

You’ll bring 5+ years shipping production software, deep Java/Spring Boot expertise, and experience with Kafka, SQL/NoSQL, Docker, Kubernetes and AWS.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field.
• 5+ years building and shipping production software, with deep expertise in Java and Spring Boot.
• Strong REST API design skills — service contracts, versioning, and backward compatibility.
• Experience designing and evolving distributed systems, including service decomposition and inter-service communication.
• Solid data modeling and persistence across SQL and NoSQL, including indexing and query performance.
• Experience with event-driven architecture (Kafka, SQS, or similar), including event design and reliability considerations.
• Strong observability instincts — logging, metrics, tracing, and debugging production systems.
• Testing across unit, integration, and contract layers, plus CI/CD, Docker, Kubernetes, and AWS.
• Ability to articulate complex technical tradeoffs to stakeholders and translate product vision into high-fidelity technical direction.
• Hands-on experience with Cursor, Claude Code, or equivalent AI-augmented IDEs — with sound discernment about where AI is strong, where it falls short, and how to avoid shipping AI-shaped code.

Responsibilities

• Own quality — design reviews, code review, test strategy, and production readiness.
• Architect for change — design and build backend systems that are small, composable, and resilient to evolving product requirements.
• Design clean contracts — dependable REST APIs, events, and service boundaries that support partner integrations and downstream systems.
• Strengthen the system — improve performance, reliability, and observability, and catch subtle issues in AI-assisted development.
• Collaborate cross-functionally — partner with product, data, and engineers to shape solutions and deliver reliably.
• Lead AI-assisted development — use AI agents for prototyping, scaffolding, and refactoring, then harden with tests and reviews.
• Raise quality through testing — unit, integration/contract tests and fast CI feedback loops.

Skills

Java

Spring Boot

REST API design

Distributed systems

SQL/NoSQL

Kafka

Docker

Kubernetes

AWS

Observability

CI/CD

AI-assisted IDEs

Education

Bachelor's degree in CS/Engineering

Tools

Kafka

PostgreSQL

Kubernetes

AWS

DataDog

Job description

Engine by Gen in New York, NY is seeking a Senior Backend Engineer (Java/Spring) to build the services behind our financial products marketplace. You’ll own critical backend systems, design clean REST contracts, and shape scalable architectures with a bias for quality and reliability.

You’ll bring 5+ years shipping production software, deep Java/Spring Boot expertise, and experience with Kafka, SQL/NoSQL, Docker, Kubernetes and AWS.