Enterprise Java Technical Lead

DNA AI TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 210,000 - 240,000; Full time

Job summary

DNA AI TECHNOLOGIES PTE. LTD. seeks a senior Java engineering leader to architect and deliver enterprise-grade Java applications and microservices. You will drive modern, scalable cloud-native solutions and secure API integrations in a globally distributed team.

The role requires deep Java expertise (8/11/17/21), Spring ecosystem mastery, and hands-on experience with AWS, Docker, Kubernetes, and CI/CD practices. You will mentor engineers and align technical deliveries with business goals.

Qualifications

• 12+ years of software engineering with enterprise Java.
• Hands-on experience with Java 8/11/17/21 and Spring stack.
• Experience with microservices, REST/SOAP, and distributed systems.

Responsibilities

• Lead architecture and develop enterprise Java apps, microservices, and APIs.
• Modernize solutions with Java, Spring, Hibernate, and Spring Security.
• Drive migration to cloud-native architectures with minimal disruption.
• Design distributed, event-driven systems using Kafka, RabbitMQ, JMS.
• Build secure APIs with OAuth2, JWT, OpenAPI/Swagger.
• Lead design reviews and establish engineering standards.
• Develop automated testing, CI/CD, and deployment practices.
• Design across relational and NoSQL databases (PostgreSQL, MySQL, MS SQL, MongoDB, Snowflake, Redis).
• Drive cloud adoption on AWS (EC2, ECS, Fargate, RDS, S3, CloudWatch).
• Troubleshoot production issues and optimize capacity, scalability, performance.
• Lead zero-downtime deployment and ensure high availability.
• Partner with product/architects to translate requirements into solutions.
• Mentor engineers, review code, and foster knowledge sharing.
• Lead globally distributed teams in Agile/Scrum.

Skills

Enterprise Java

Java 8

Java 11

Java 17

Java 21

Spring Boot

Spring Cloud

Spring Data JPA

Hibernate

Microservices

RESTful APIs

SOAP

Event-driven

Kafka

RabbitMQ

JMS

AWS

Docker

Kubernetes

Jenkins

Git

CI/CD

PostgreSQL

MySQL

MS SQL

MongoDB

Snowflake

Redis

JUnit

Mockito

TDD

SonarQube

OAuth2

JWT

OpenAPI

Swagger

Angular

React

Agile

Scrum

Kanban

Tools

Docker

Kubernetes

Jenkins

Git

CI/CD

Job description

Key Responsibilities

• Lead the architecture and development of enterprise-grade Java applications, microservices, and REST/SOAP APIs.
• Design and modernize scalable solutions using Java 8-21, Spring Boot, Spring Cloud, Hibernate, and Spring Security.
• Drive migration of legacy applications toward modern, decoupled, cloud-native architectures with minimal business disruption.
• Design distributed systems and event-driven solutions using Kafka, RabbitMQ, JMS, and related messaging technologies.
• Build secure APIs and integrations using OAuth2, JWT, API authentication, OpenAPI/Swagger, and enterprise security best practices.
• Lead technical design reviews and establish engineering standards based on SOLID, TDD, DDD, design patterns, and clean architecture.
• Develop and enforce automated testing, code quality, CI/CD, and deployment practices using JUnit, Mockito, SonarQube, Jenkins, Docker, and Kubernetes.
• Design solutions across relational and NoSQL databases, including PostgreSQL, MySQL, MS SQL, MongoDB, Snowflake, and Redis.
• Drive cloud adoption and deployment across AWS environments, including services such as EC2, ECS, Fargate, RDS, S3, CloudWatch, and related platforms.
• Troubleshoot complex production and performance issues and conduct capacity, scalability, and performance assessments.
• Lead zero-downtime deployment strategies and ensure high availability, resilience, and operational stability.
• Partner with product managers, architects, and business stakeholders to translate requirements into practical technical solutions.
• Mentor engineers, conduct code reviews, and foster a culture of continuous improvement and knowledge sharing.
• Lead globally distributed engineering teams and ensure predictable delivery across Agile/Scrum environments.

Required Skills & Experience

• 12+ years of software engineering experience, with extensive enterprise Java development experience.
• Strong hands-on expertise in Java 8, 11, 17, and 21.
• Advanced experience with Spring Boot, Spring Cloud, Spring Data JPA, Spring Security, and Hibernate.
• Strong understanding of microservices, distributed systems, RESTful APIs, SOAP, and event-driven architecture.
• Hands-on experience with Kafka, RabbitMQ, and JMS.
• Strong experience with AWS cloud platforms and cloud-native application development.
• Experience with Docker, Kubernetes, Jenkins, Git, and CI/CD automation.
• Strong database expertise across PostgreSQL, MySQL, MS SQL, MongoDB, Snowflake, and Redis.
• Proficiency in JUnit, Mockito, TDD, SonarQube, and secure coding practices.
• Experience designing applications for high availability, scalability, performance, and zero-downtime deployment.
• Strong understanding of OAuth2, JWT, API security, and enterprise authentication.
• Exposure to frontend technologies such as Angular or React is desirable.
• Strong analytical, problem-solving, communication, and stakeholder-management skills.

Leadership Expectations

The successful candidate will be more than a senior Java developer—they will act as a technical authority and engineering leader, capable of taking ownership from architecture and design through development, deployment, and production support.

Experience across healthcare/telehealth, trade & logistics, retail, SaaS, or e-learning platforms will be highly advantageous.

Mandatory Technical Stack

• Java: Java 8/11/17/21
• Frameworks: Spring Boot, Spring Cloud, Spring Security, Hibernate
• Architecture: Microservices, Distributed Systems, REST, SOAP, Event-Driven Architecture
• Messaging: Kafka, RabbitMQ, JMS
• Databases: PostgreSQL, MySQL, MS SQL, MongoDB, Snowflake, Redis
• Cloud: AWS – EC2, ECS, Fargate, RDS, S3, CloudWatch
• DevOps: Docker, Kubernetes, Jenkins, Git, CI/CD
• Security: OAuth2, JWT, Okta
• Testing: JUnit, Mockito, TDD
• API: OpenAPI, Swagger
• Frontend: Angular / React
• Methodologies: Agile, Scrum, Kanban