Senior Outsystems Developer - 12 Months Contract

persol tech services pte. ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

PERSOL Tech Services Pte Ltd is seeking an experienced OutSystems Architect to design, build, and optimize enterprise-grade applications across DEV/UAT/PROD in a multi-environment setup. You will translate complex requirements into scalable technical blueprints and develop performant reactive web/mobile solutions.

Responsibilities include integration design, ALM with LifeTime, security, and collaboration with DevOps and infrastructure teams to ensure robust, compliant deployments.

Qualifications

• Bachelor’s degree in Software Engineering, Computer Science, Information Technology, or related technical discipline.
• Minimum 5–8 years of hands-on software engineering experience with at least 5 years in OutSystems 11 development.
• Proven experience delivering large-scale mission-critical OutSystems applications.
• Strong expertise with OutSystems Service Studio, Integration Studio, LifeTime.

Responsibilities

• Architect, design, and implement enterprise-grade OutSystems 11 applications across DEV/UAT/PROD environments.
• Translate requirements into technical designs and implementation blueprints.
• Develop and optimize Reactive Web and Mobile apps using OutSystems best practices.
• Design and implement integration architectures using REST, SOAP, OData, and event-driven patterns.
• Build and maintain custom OutSystems extensions via Integration Studio.
• Enforce ALM with LifeTime: deployment strategies, versioning, and environment synchronization.
• Conduct performance tuning and RCA across UI, app, DB, and integration layers.
• Design and optimize database schemas and SQL queries for high-volume systems.
• Develop reusable framework components, Forge assets, and shared UI/logic modules.
• Implement enterprise authentication (SAML, OAuth2.0, OpenID Connect, LDAP/AD).
• Adhere to secure coding standards aligned with OWASP Top 10.
• Participate in design authority reviews, architecture governance, and code reviews.
• Support full testing lifecycle: unit, SIT, UAT, regression, production validation.
• Collaborate on CI/CD pipelines and cloud deployments (AWS/Azure).
• Maintain documentation covering architecture, integrations, configurations, and deployment.
• Collaborate with infra teams on monitoring, logging, and ops readiness.

Skills

OutSystems architecture

Performance optimization

REST/SOAP API design

Agile/Scrum

Troubleshooting multi-layer systems

Secure SDLC / OWASP

Education

Bachelor's degree in Software Engineering / CS / IT

Tools

OutSystems Service Studio

OutSystems Integration Studio

OutSystems LifeTime

AWS / Azure

App Insights / CloudWatch

SQL Server

CI/CD tools (Azure DevOps, Jenkins, GitLab CI/CD, GitHub Actions)

GitHub Actions

Job description

Responsibilities

• Architect, design, and implement enterprise-grade OutSystems 11 (O11)applications across multi-environment landscapes (DEV/UAT/PROD), ensuring scalability, maintainability, and performance


• Translate complex functional and non-functional requirements into technical solution designs, architecture decisions, and implementation blueprints.


• Develop and optimize Reactive Web and Mobile applicationsusing OutSystems best practices and performance-oriented design patterns.


• Design and implement integration architecturesleveraging REST, SOAP, OData, and event-driven/middleware-based communication patterns.


• Build and maintain custom OutSystems extensions via Integration Studio for advanced system interoperability.


• Implement and enforce application lifecycle management (ALM)using LifeTime, including deployment strategies, versioning control, and environment synchronization.


• Conduct performance tuning and root cause analysis (RCA)for production issues across application, database, and integration layers.


• Design and implement database schemas, SQL queries, and optimization strategiesto support high-volume transactional systems.


• Develop reusable framework components, Forge assets, and reusable UI/logic modules to enforce standardization across applications.


• Implement enterprise-grade authentication and authorization mechanisms(SAML, OAuth2.0, OpenID Connect, LDAP/AD integration).


• Ensure applications adhere to secure coding standards aligned with OWASP Top 10, including vulnerability mitigation and security hardening.


• Participate in technical design authority reviews, architecture governance sessions, and peer code reviews.


• Support full testing lifecycle including unit testing, SIT, UAT, regression testing, and production validation.

• Design and support CI/CD pipelines, automated deployment processes, and DevOps workflows.

• Collaborate with infrastructure teams on cloud deployments (AWS/Azure), including environment configuration, monitoring, and operational readiness.

• Maintain detailed technical documentation covering architecture, integrations, configurations, and deployment processes.

Qualifications

• Bachelor’s degree in Software Engineering, Computer Science, Information Technology, or a related technical discipline.


• Minimum 5–8 years of hands-on software engineering experience, with at least 5 years in OutSystems 11 (O11)development in enterprise environments.


• Proven experience delivering large-scale, mission-critical applicationsusing OutSystems (multi-module, multi-team delivery).


• Strong expertise in OutSystems Service Studio, Integration Studio, and LifeTime administration.


• Deep understanding of OutSystems architecture patterns, including asynchronous processes, timers, BPT workflows, and scalability considerations.


• Advanced proficiency in REST/SOAP API design and integration, including authentication, throttling, and error handling strategies.


• Hands-on experience developing custom extensions using C#/.NET or Javawithin OutSystems Integration Studio.


• Strong SQL expertise, including query optimization, indexing strategy, execution plan analysis, and performance tuning in SQL Server.


• Experience with enterprise authentication protocols: SAML 2.0, OAuth 2.0, OpenID Connect, LDAP/Active Directory.


• Solid understanding of secure SDLC practices, OWASP Top 10, and vulnerability remediation in enterprise applications.


• Experience with CI/CD pipelines and DevOps tooling(Azure DevOps, Jenkins, GitLab CI/CD, GitHub Actions).


• Experience deploying applications on AWS or Microsoft Azure, including environment configuration and cloud-based architecture considerations.


• Familiarity with application monitoring, logging, and observability tools(OutSystems monitoring, App Insights, CloudWatch, etc.).


• Experience working in Agile/Scrum environments with structured engineering practices (code reviews, sprint planning, technical grooming).


• Strong analytical ability to troubleshoot multi-layer system issues (UI, application logic, integration, database, infrastructure).


• Experience with performance-critical systemsand high-availability production environments.

Duration: 1 year

Working Hours: 8.30am - 6pm, Monday - Fridays. Standby and shift work may be required

Location: Central, roaming may be required

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PERSOL Tech Services Pte Ltd
UEN No. 202233837K