NestJS to Java Migration Lead Backend Software Engineer

TalascendTroy, Michigan, US

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Talascend is currently seeking a NestJS to Java Migration Lead Backend Software Engineer for a remote W-2 contract opportunity.

SUMMARY :

We are seeking a highly skilled expert to develop and own the migration of our existing NestJS services to a Java-based microservices architecture. In this role, you will lead the entire migration process —from planning and design to backend development, execution, and final delivery—ensuring a seamless transition and minimal disruption to our services.

LOCATION :

Hybrid in Newark, California is preferred.
Remote working on Pacific Time is acceptable.

RESPONSIBILITIES :

Rewrite and refactor NestJS (TypeScript) backend services into Java microservices (e.g., Spring Boot).

Ensure minimal service disruption and maintain backward compatibility.

Independently define and implement the new Java microservices architecture.

Set best practices for microservices communication, data management, and performance optimization.

Write comprehensive tests (unit, integration, performance) to validate the migrated codebase.

Ensure the system meets reliability and performance benchmarks expected in automotive supply chain solutions.

Document the new architecture and migration process to enable future maintenance and enhancements.

Provide regular status updates to stakeholders on migration progress, risks, and timelines.

Diagnose and fix issues that arise during the migration, ensuring a stable release.

Provide knowledge transfer or handover documentation upon contract completion.

REQUIREMENTS :

US Citizen or Green Card Holder.

3–4 years of hands-on experience building and deploying NestJS applications.

Deep understanding of TypeScript design patterns, decorators, and module architecture.

Proven ability to design and implement microservices at scale (REST, messaging, distributed transactions).

10+ years of professional experience in Java (preferably with Spring Boot), with a strong background in concurrency and multi-threading.

Expertise in designing and implementing microservices at scale (REST, messaging, distributed transactions), including advanced concurrency patterns and performance tuning.

Familiarity with memory management, garbage collection tuning, and distributed caching to optimize throughput in high-traffic environments.

Proven ability to diagnose and resolve concurrency issues in distributed systems, ensuring reliability and scalability under heavy load.

Experience with MongoDB change streams.

Practical experience with Kafka (topic setup, message schemas, connectors).

Ability to migrate event-driven processes from Node.js to Java seamlessly.

Demonstrated track record of working on complex technical projects, with minimal supervision.

Excellent accountability and ownership attitude.

Strong written and verbal communication skills for stakeholder updates.

Ability to provide clear and concise technical documentation.

PREFERRED QUALIFICATIONS :

Strong experience with AWS is a plus.

Experience with Spring Cloud microservices (Eureka, Config Server, etc.).

Familiarity with containerization (Docker, Kubernetes).

Knowledge of CI / CD pipelines (e.g., Jenkins, GitLab, AWS CodePipeline).

Automotive or supply chain industry experience (telemetry, vehicle diagnostics) is a plus.

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Java Backend • Troy, Michigan, US