Java FSD with Kotlin

SFE; Jersey City (NJ); On-site; USD 140,000 - 180,000; Full time

Job summary

SFE in Jersey City, NJ seeks a Senior Backend Engineer with 10+ years of software experience. The role focuses on cloud-native backend platforms using Kotlin, Spring Boot, Spring Cloud, WebFlux, AWS, and Terraform.

A hands-on engineer is expected to design, deploy, and manage scalable services with minimal supervision. Strong emphasis on building reliable systems, ECS container orchestration, IaC practices, and observability.

Qualifications

• 10+ years of software development experience.
• 4+ years with Kotlin and the modern Spring ecosystem.
• Proven AWS backend engineering in production.

Responsibilities

• Design, develop, and maintain scalable backend platform services and APIs.
• Build cloud-native microservices using Kotlin, Spring Boot, Spring Cloud, and WebFlux.
• Deploy, configure, and manage AWS infrastructure using Terraform.

Skills

Kotlin

Spring Boot

Spring Cloud

WebFlux

AWS Cloud Services

RESTful APIs

Microservices

CI/CD

Reactive programming

Tools

AWS ECS

Terraform

Job description

Job Title: Senior Backend Engineer

Experience: 10+ Years

Location: Jersey City, NJ

RTTO 5 Days Onsite

Note: Do not submit a profile without Kotlin experience; the coding round will be done in Kotlin.

Job Summary

We are seeking a highly skilled Senior Backend Engineer with strong expertise in building and supporting cloud-native backend platforms. The ideal candidate will be a hands‑on engineer who can independently design, develop, deploy, and manage backend services using Kotlin, Spring Boot, Spring Cloud, WebFlux, AWS, and Terraform. This role requires someone who is comfortable working in a fast‑paced environment and can quickly contribute with minimal supervision.

Key Responsibilities

• Design, develop, and maintain scalable backend platform services and APIs.
• Build cloud-native microservices using Kotlin, Spring Boot, Spring Cloud, and WebFlux.
• Deploy, configure, and manage AWS infrastructure using Terraform.
• Provision AWS resources manually through Infrastructure as Code (IaC) practices and troubleshoot infrastructure‑related issues.
• Configure, deploy, and manage containerized applications on AWS ECS.
• Collaborate with architecture and platform teams to ensure highly available and resilient systems.
• Optimize application performance, scalability, and reliability.
• Implement best practices around observability, monitoring, logging, and operational excellence.
• Participate in code reviews, technical design discussions, and production support activities.

Required Skills & Experience

Technical Skills

• Comfortable in using Kotlin with Spring boot
• Extensive hands‑on experience with Spring Boot, Spring Cloud, and WebFlux.
• Deep understanding of reactive programming concepts and microservices architecture.
• Strong experience with AWS Cloud Services.
• Expert-level experience in Terraform for provisioning and managing cloud infrastructure.
• Hands‑on experience configuring and managing AWS ECS (Elastic Container Service).
• Experience developing RESTful APIs and backend platform services.
• Strong understanding of distributed systems and cloud‑native application design.
• Experience with CI/CD pipelines and DevOps practices.
• Familiarity with containerization technologies and cloud deployment strategies.

Experience

• 10+ years of overall software development experience.
• 4+ years of hands‑on experience with Kotlin and the modern Spring ecosystem.
• Proven experience independently delivering backend and platform engineering solutions in AWS environments.

Preferred Qualifications

• Experience working with event‑driven architectures.
• Familiarity with Kafka or other messaging platforms.
• Experience with observability tools such as CloudWatch, Datadog, Splunk, or Prometheus.
• Knowledge of security best practices in cloud environments.
• Experience working in Agile/Scrum teams.