Senior Java / AWS Developer - Level III

Sligo Software Solutions; City of Albany (NY); On-site; USD 140,000 - 190,000; Full time

Job summary

Sligo Software Solutions in New York is seeking a Senior Java Developer to work on complex government-grade microservices. You will lead design and development of distributed services using Java 21, Spring Boot, and AWS, with a focus on scalable APIs and robust reliability.

The ideal candidate has 7+ years of deep Java experience, hands-on with microservices patterns, CI/CD pipelines, containerization with Docker and Kubernetes, and familiarity with AWS deployment.

Qualifications

• 7+ years of professional Java development with Spring Boot and microservices.
• Experience with AWS and building/operating microservices in cloud environments.
• Strong RESTful API design and inter-service communication skills.

Skills

Java

Spring Boot

Microservices

AWS

REST APIs

Docker

Kubernetes

CI/CD

Git

Service Mesh

API Gateway

PostgreSQL

Kafka

SQS

SNS

OpenTelemetry

Terraform

CloudFormation

OAuth2/OpenID

Tools

Jenkins

GitHub Actions

CloudWatch

Liquibase

Flyway

Job description

Mandatory Skills:

1. 15 Years of Total work experience.
2. 12 years of Relevant experience.

Local candidates highly preferred.

Prior Government client Experience will be a great pick

Must / Mandatory Qualification:

1. Level III- More than seven (7) years of experience working on complex projects with 2 or more years in a leadership role as a Developer
2. 7+ years of professional Java development experience with strong proficiency in Java 21 (records, sealed classes, pattern matching, virtual threads). One to three years of experience designing and building microservices architectures - service decomposition, API gateway patterns, service discovery, and distributed configuration; deploying and operating microservices on AWS (EC2, ECS/EKS, RDS, S3, S4, Lambda).
3. Seven years of experience with Spring Boot and the Spring ecosystem (Spring MVC, Spring Data, Spring Security, Spring Cloud); Spring Batch for large-scale batch processing; solid understanding of Hibernate/JPA for ORM and database interaction; experience with PostgreSQL or similar relational databases; building and consuming RESTful APIs with proper versioning and contract-first design; experience with inter-service communication patterns (REST, messaging queues, event-driven).

Additional Qualifications:

1. Experience with government or public sector projects
2. Familiarity with CI/CD tools (Jenkins, GitHub Actions, or similar) for microservices deployment pipelines; distributed system concerns: fault tolerance, circuit breakers, retries, and observability.
3. Hands-on experience with microservices patterns such as saga, CQRS, event sourcing, and API composition; service mesh technologies and API gateway solutions (AWS API Gateway, Spring Cloud Gateway)
4. Experience with Git version control and collaborative development workflows; strong understanding of software design patterns, SOLID principles, and clean code practices
5. Experience with containerization (Docker) and orchestration (Kubernetes/ECS) for microservices deployment
6. Knowledge of message-driven architecture (SQS, SNS, Kafka) for asynchronous inter-service communication; database-per-service patterns and database migration tools (Flyway, Liquibase etc)
7. Experience with centralized logging and distributed tracing across microservices (CloudWatch, Splunk, Datadog, Zipkin, OpenTelemetry)
8. Knowledge of infrastructure-as-code (Terraform, CloudFormation); OAuth2/OpenID Connect for securing microservices