Senior Backend Engineer (Java, Reactive Systems, Node.js)

2 years

0 Lacs

Posted:1 week ago| Platform: Linkedin logo

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Work Mode

Remote

Job Type

Full Time

Job Description

Profile: Senior Backend Engineer (Java, Reactive Systems, Node.js) – Enterprise FinTech

About the Role

Senior Backend Engineer

deeply technical, hands-on role

scalable backend systems under real production load


Key Responsibilities

  • Architect and implement

    reactive, non-blocking backend services

    in Java
  • (Spring Boot WebFlux / Quarkus / Micronaut)
  • Design and maintain

    REST and GraphQL APIs

    with strong performance and backward compatibility
  • Build and own

    Node.js services

    for authentication, orchestration, and BFF layers
  • Implement

    Saga patterns

    and compensating transactions for distributed financial workflows
  • Design

    Apache Camel integrations

    using enterprise integration patterns and BPMN flows
  • Optimize

    ORM usage

    (Hibernate / JPA / TypeORM) for performance, caching, and transaction safety
  • Apply

    reactive programming paradigms

    (Project Reactor / RxJava) for high concurrency
  • Design

    resilient systems

    using circuit breakers, retries, rate limiting, and fallbacks
  • Lead

    code reviews, architecture discussions, and production incident resolution

  • Mentor engineers and influence backend architecture standards


Required Skills (Non-Negotiable)

  • 2-4 years of Backend developer experience ( For Junior Role )

  • 6+ years of Backend engineering experience ( For Senior Role )

  • Strong production experience with

    Java backend frameworks

·      Spring Boot (WebFlux preferred) / Quarkus / Micronaut

  • Deep reactive programming experience

·      Project Reactor / RxJava / non-blocking I/O

  • Strong

    Node.js

    experience for backend or middleware services
  • Proven experience designing

    REST and GraphQL APIs at scale

  • Strong GraphQL fundamentals:

·      Schema design

·      Resolver optimization

·      N+1 elimination

  • Advanced

    ORM knowledge

·      Hibernate / JPA / TypeORM

·      Query tuning, caching, transaction management

  • Experience with

    distributed systems

·      Saga pattern

·      Event-driven or async processing

  • Strong

    database fundamentals

·      PostgreSQL / Oracle

·      Indexing, query plans, isolation levels

  • Authentication & security knowledge:

·      OAuth2 / OIDC

·      JWT

  • Production experience with:

·      Docker

·      Cloud platforms (AWS or Azure)

  • Strong understanding of

    observability

·      Logs, metrics, tracing (Prometheus / ELK / Dynatrace / New Relic)


Good-to-Have (Strong Advantage)

  • FinTech / retirement / regulated-domain experience
  • Apache Camel in production
  • Kafka / RabbitMQ / event streaming
  • BPMN or workflow orchestration engines
  • CQRS / Event Sourcing exposure
  • API gateways, service mesh, platform engineering
  • Chaos engineering or SRE practices


What We Are Looking For

  • A

    true senior backend engineer

    , not just a feature developer
  • Someone who has

    owned systems in production

  • Strong bias toward

    performance, reliability, and correctness

  • Comfortable working in

    audit-heavy, compliance-driven environments

  • Mentors others and raises backend engineering standards


Work Mode

  • Remote

Interview Process

  • Deep backend fundamentals & architecture screening
  • Reactive systems + API design discussion
  • Distributed systems / Saga / failure-handling scenarios
  • Code review or system-design round
  • Final client/architect interaction (if required)


#Applicant can also mail their updated resume at aishwarya@mappoptimist.com


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