Full Stack Developer

Liquid Group; Kuala Lumpur; On-site; MYR 180,000 - 240,000; Full time

Job summary

Liquid Group, a FinTech payments services group, seeks a Senior Full Stack Engineer with 5+ years of experience to design secure, scalable apps using Java, Spring Boot, and .NET. The role spans front-end and back-end work, REST APIs, microservices, and CI/CD across cloud platforms.

Experience in banking or financial services is a strong advantage. You will mentor engineers and help shape technical roadmaps while collaborating with Product, Design and QA teams.

Qualifications

• 5+ years professional software engineering experience.
• Expert-level Java (11+) and Spring Boot experience.
• Hands-on .NET, C#, ASP.NET Core and Web API experience.

Responsibilities

• Design, build, and maintain end-to-end solutions with frontend and backend tech.
• Lead technical design, write docs, drive delivery.
• Develop and evolve REST APIs, microservices, and event integrations.
• Modernise existing Java/.NET apps with refactoring and tuning.
• Improve performance, reliability, security of production systems.
• Review code, mentor juniors, establish CI/CD standards.
• Participate in on-call support and post-incident reviews.
• Collaborate with Product/Design/QA to break down requirements.
• Contribute to hiring, estimation, and roadmap planning.

Skills

Java

Spring Boot

C#

ASP.NET Core

React

Angular

TypeScript

REST APIs

Microservices

Kafka

RabbitMQ

PostgreSQL

SQL Server

Oracle

AWS

Azure

Docker

Kubernetes

CI/CD

Security

Job description

Liquid Group is a FinTech payments services group based in Singapore. Liquid empowers and connects businesses and individuals to make transactions in a smart, secure, and cost-effective way, anywhere in the world.

We operate a regional payment network that enables cross-border QR payment services for e-wallet operators, banks, and merchants. We also provide white-label solutions to accelerate the development and adoption of mobile payments for our business partners.

We work collaboratively and adaptively, exploring innovative ideas and solving challenging problems to develop our products. Together, we ensure efficiency, security, and convenience for our partners and customers.

Role Overview

We are looking for a Full Stack Engineer with at least 5 years of experience to design and deliver secure, scalable applications across web front-end technologies and back-end services built with Java, Spring Boot, and .NET. Prior experience in banking or financial services is a strong advantage.

Responsibilities

• Design, build, and maintain end-to-end solutions, including responsive web front ends and back-end services using Java (Spring Boot) and .NET.
• Lead technical design for new features and services, write design documents, and drive implementation through to delivery.
• Develop and evolve REST APIs, microservices, and event-driven integrations with internal and third-party systems.
• Modernise and maintain existing Java and .NET applications, including refactoring, migration, and performance tuning.
• Improve the performance, reliability, observability, and security of production systems.
• Review code, mentor junior and mid-level engineers, and help establish coding, testing, and CI/CD standards.
• Participate in on-call support and incident response, and lead root cause analysis and post-incident reviews.
• Work with Product, Design, and QA teams to break down ambiguous requirements and deliver solutions iteratively.
• Contribute to hiring, estimation, and technical roadmap planning.

What We Are Looking For

• At least 5 years of professional software engineering experience, with a proven track record of building and maintaining production systems.
• Expert-level knowledge of Java (11 or later) and Spring Boot, including Spring MVC or WebFlux, Spring Data/JPA, Spring Security, and Spring Cloud.
• Hands-on .NET experience with C#, ASP.NET Core, Web API, and Entity Framework, including the ability to build, maintain, and integrate with .NET services.
• Strong front-end development skills in React or Angular, TypeScript, HTML5, and CSS3, including state management, accessibility, and responsive design.
• Solid experience designing microservices, REST APIs, and event-driven systems using messaging platforms such as Kafka or RabbitMQ.
• Strong database skills in PostgreSQL, SQL Server, or Oracle, covering data modelling, transactions, and query tuning, with familiarity with Redis or other NoSQL databases.
• Experience with a major cloud platform (AWS or Azure), Docker, container orchestration (Kubernetes or ECS), and CI/CD pipelines.
• Good understanding of application security, including OAuth 2.0, OpenID Connect (OIDC), JSON Web Tokens (JWT), secure coding, and OWASP practices.
• Strong testing practices, including JUnit, Mockito, xUnit, integration testing, and end-to-end testing tools such as Cypress or Playwright.
• Proven ability to lead technical discussions, mentor engineers, and communicate clearly with technical and non-technical stakeholders.

Added Advantage: Banking Domain Experience

• Experience building or integrating with core banking, digital banking, lending, cards, or wealth management platforms.
• Understanding of financial regulations and security standards, such as PCI DSS and applicable local regulatory technology risk guidelines.
• Experience designing transaction-processing systems for high availability, auditability, idempotency, and data integrity.

Key Skills

Full Stack Development | Java | Spring Boot | .NET | C# | ASP.NET Core | React | Angular | TypeScript | REST APIs | Microservices | Kafka | RabbitMQ | PostgreSQL | SQL Server | Oracle | AWS | Azure | Docker | Kubernetes | CI/CD | Application Security | Automated Testing | Banking Technology