Top Backend Developer Jobs in Singapore

Design and build reliable backend systems for Airwallex’s billing platform, including pricing, invoicing, and quote-to-cash workflows. Develop highly concurrent, highly available distributed services with strong financial accuracy. Partner with Product and business teams, make architectural decisions, optimize service performance and data queries, and improve engineering quality through design standards and collaboration.

Lead design and implementation of a next-gen billing platform: analyze requirements, design architecture, develop core components on a microservice framework, ensure high concurrency/availability, introduce new technologies, and build/manage the technical team and coding standards.

Build and operate a secure AWS-based AI Foundation and agentic AI platform for Singapore Government Agencies. Responsibilities include developing backend and full-stack services, RAG pipelines, AI agents, infrastructure-as-code, CI/CD, observability, security controls, cost optimization, and reusable platform components. The role requires integrating enterprise systems, supporting model customization, managing agent identities and guardrails, troubleshooting platform issues, preparing architecture and security documentation, and onboarding government workflows.

Build and improve production-grade GenAI applications using orchestration frameworks, agentic workflows, RAG, tool calling, and open-weight or hosted models. Integrate AI applications with enterprise APIs, data sources, and operational systems while ensuring reliability, observability, testing, maintainability, and resilience. The role requires strong backend engineering, distributed systems knowledge, troubleshooting ability, and cross-functional collaboration across application, data, platform, infrastructure, and security teams.

Build and operate reliable backend services and APIs, take features from concept to production, make architectural decisions, monitor and improve system resilience, review code, mentor engineers, and collaborate with product, design, and business teams. The role requires strong API, database, data modeling, production operations, and incident response experience, with curiosity and practical experience using AI.

Leads high-impact backend and financial operations projects involving payments, transactions, middleware, GraphQL schemas, APIs, and data models. Provides staff-level technical leadership, drives architectural decisions, partners cross-functionally with Product and Design, and improves engineering standards such as testing, code review, documentation, and SDLC practices. Works hands-on across project delivery while shaping company-wide engineering culture and technical direction.

Build and maintain scalable Python backend services and secure FastAPI APIs, integrating LLMs and AI workflows into production applications. Own features through design, implementation, testing, deployment, and support. Improve reliability, performance, observability, and maintainability through database optimization, caching, asynchronous processing, secure API design, automated testing, CI/CD, and containerization. Collaborate across product, frontend, AI, and infrastructure teams while mentoring junior engineers and contributing to architecture.

Own the architecture and technical execution of a globally distributed, multi-tenant MaaS backend platform. Build compatible inference APIs, intelligent routing, model-serving integrations, performance optimization, metering and billing systems, security controls, observability, and zero-downtime migrations. Lead reliability practices including SLOs, load testing, incident response, and operational runbooks while mentoring engineers and coordinating with architects and cross-functional teams.

Senior Backend Software Engineer responsible for designing, building, and optimizing large-scale distributed systems. The role focuses on backend architecture, microservices, cloud infrastructure, reliability, scalability, performance monitoring, automated testing, CI/CD, and code quality. Responsibilities include resolving complex technical issues, managing delivery priorities, collaborating with Product and international teams, participating in architectural reviews, and mentoring junior engineers. Strong experience with Golang, AWS or GCP, Docker, Kubernetes, databases, Redis, Elasticsearch, and observability tools is required.

Develop and maintain scalable Java and Spring Boot backend services for APAC e-commerce. Design RESTful APIs and microservices, implement secure OAuth 2.0 integrations, work with databases and messaging systems, and support cloud-native deployments using Kubernetes and CI/CD. Responsibilities include testing, code reviews, documentation, monitoring, troubleshooting, stakeholder collaboration, and continuous technology improvement within an Agile team.

Design, develop, and maintain scalable backend services, APIs, microservices, databases, integrations, and data-processing systems for the COMPASS platform. Implement security, monitoring, logging, testing, deployment, and observability capabilities. Troubleshoot production issues, optimize performance, collaborate with frontend and data teams, document technical solutions, and participate in Agile ceremonies and code reviews.

Develop and optimize Java backend systems, design scalable and highly available architectures, solve complex high-concurrency problems, and participate throughout the software development lifecycle. Responsibilities include coding, refactoring, testing, deployment, monitoring, technical innovation, cross-functional collaboration, and knowledge sharing.

Develop and maintain REST APIs and backend services using Java, Spring Boot, and Node.js. Troubleshoot deployment and system issues, improve performance and reliability, participate in code reviews, implement secure backend features, support CI/CD, and collaborate with frontend developers on API integration.

Design and maintain high-performance Rust backend infrastructure for institutional decentralized trading. Build and audit secure smart contracts, optimize sub-millisecond trading systems, and contribute to distributed protocol architecture. Integrate privacy-preserving cryptography and Trusted Execution Environments into transaction pipelines. The role requires experience with systems programming, quantitative trading infrastructure, blockchain architecture, smart contract security, low-latency distributed systems, and cryptographic concepts.

The Senior Backend Engineer will develop and maintain backend services and APIs on a .NET and Azure stack, optimize SQL Server models, and enhance platform reliability while working within a global team.

Design, build, and operate high-performance Java backend services and distributed financial systems. Responsibilities include developing Spring and Spring Boot APIs, optimizing latency and asynchronous processing, integrating financial platforms, implementing messaging and event-driven flows, conducting performance testing, and maintaining code quality through testing, reviews, and CI/CD. The role also involves shaping wealth-management capabilities integrated with e-banking, ensuring security, auditability, reliability, and end-to-end ownership across the software lifecycle.

Leads application development and systems analysis for Citi’s equity derivatives pre-trade platform. Responsibilities include designing and implementing application enhancements, solving complex technical problems, establishing coding and testing standards, supporting legacy modernization, applying Agile and DevOps practices, and coaching developers and analysts. The role requires expertise in Java-based application development, microservices, containerization, Couchbase, and software delivery best practices, with preferred experience in Kotlin, C#, Microsoft SQL Server, and equity derivatives.

Lead security architecture for scalable, highly available backend systems. Design and optimize traffic risk-control, anti-fraud, and account-security platforms; conduct architecture reviews; improve system stability and security under high concurrency; and collaborate with product, business, and engineering teams to deliver mission-critical security capabilities.

Develop backend blockchain functionality for Cardax DEX on the Cardano blockchain. Write and maintain smart contracts in Plutarch and Haskell that define the constraints and conditions for decentralized token exchange without a central entity.

Designs and owns architecture for Live Sports and Discover APIs, develops highly available and scalable backend systems, and creates low-latency solutions for millions of customers. The role leads strategic projects, mentors engineers, establishes engineering best practices, collaborates cross-functionally, and leverages AI to improve development quality and productivity.

Design, build, and maintain scalable, secure backend services for card issuance and spend management. Own end-to-end feature delivery, contribute to architecture, write reliable testable code, ensure observability and API quality, collaborate cross-functionally, and mentor other engineers.

Develop and maintain high-performance C# backend services, APIs, and financial platforms. Integrate financial systems and third-party services, optimize performance, ensure security and data integrity, troubleshoot development and production issues, and support releases and change management. Participate in Agile planning and ceremonies, conduct code reviews, testing, and CI/CD activities, and provide post-implementation support across global teams.

Lead design and implementation of production-grade stablecoin infrastructure: key management, transaction signing, gas fee handling, mint/burn/transfer lifecycle, multi-chain ledgering, and integration with FX and payment systems. Collaborate across product, infrastructure, and compliance to deliver secure, auditable services.

The Backend Software Engineer will develop and maintain backend systems for data processing related to coffee farming, utilizing Python and PostgreSQL. Responsibilities include feature development, problem-solving, and adapting systems to regulatory changes while ensuring system resilience.

As a Senior Software Engineer, you'll design and maintain backend systems for DNA sequencing instruments, develop APIs, and enhance engineering practices while mentoring junior staff.