Sr. Backend Engineer

INFRASOFT TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 100,000 - 130,000; Full time

Job summary

A technology solutions provider in Singapore is seeking a Senior Backend Engineer to design, develop, and maintain scalable backend services. The ideal candidate has over 9 years of experience, strong expertise in Java Spring Boot, Kotlin, or C#, and is skilled in AWS services. This role offers opportunities for technical leadership, professional development, and a collaborative team environment.

Benefits

Competitive compensation package

Flexible working arrangements

Professional development support

Regular knowledge sharing sessions

Qualifications

• 9+ years of professional software development experience.
• Proficient in Java 11+/Kotlin/C#.
• Strong understanding of software design patterns (SOLID, DRY).

Responsibilities

• Designing, developing, and maintaining scalable backend services and APIs.
• Contributing to architectural decisions and mentoring junior developers.

Skills

Java Spring Boot

Kotlin

C# (.NET Core)

AWS Lambda

RESTful APIs

Microservices architecture

SQL

NoSQL databases

Version control (Git)

CI/CD practices

Agile development practices

Tools

Maven/Gradle

Jenkins/GitLab CI

Terraform

Job description

Senior Backend Software

We are seeking a skilled Senior Backend Engineer to join our agile development team. In this role, you will be responsible for designing, developing, and maintaining scalable backend services and APIs, while contributing to architectural decisions and mentoring junior developers.

Required Skills and Experience:

• 9+ years of professional software development experience

• Strong expertise in either Java Spring Boot, Kotlin, or C# (.NET Core)

• Extensive experience with RESTful APIs and microservices architecture

• Proven experience with AWS services including:

o AWS Lambda and serverless architecture

o Amazon ECS/EKS

o Amazon RDS and DynamoDB

o Amazon S3

o AWS CloudFormation/CDK

o Amazon CloudWatch

o AWS IAM and security best practices

• Proficient in SQL and experience with both relational and NoSQL databases

• Strong understanding of software design patterns and principles (SOLID, DRY, etc.)

• Experience with version control systems (Git) and CI/CD practices

• Knowledge of testing methodologies and frameworks (JUnit, TestNG, NUnit)

• Experience with agile development practices

• Strong analytical and problem-solving skills

Technical Skills:

• Languages: Java 11+/Kotlin/C#

• Frameworks: Spring Boot, Spring Cloud, .NET Core

• Infrastructure as Code using Terraform

• Databases: PostgreSQL, MySQL, MongoDB, DynamoDB

• Tools: Maven/Gradle, Git, Jenkins/GitLab CI

• Testing: JUnit, Mockito, TestContainers

• Documentation: Swagger/OpenAPI

• Monitoring: CloudWatch, ELK Stack, Prometheus, Grafana

What We Offer:

• Opportunity to work on impactful government digital services

• Technical leadership opportunities

• Professional development and AWS certification support

• Competitive compensation package

• Flexible working arrangements

• Regular knowledge sharing sessions

• Collaborative team environment

If you are passionate about backend development and cloud architecture, and want to contribute to meaningful public sector projects, we would love to hear from you.