Python Developer – Application Security

HI5 CONSULTING SOLUTIONS PTE. LTD.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

HI5 Consulting Solutions Pte. Ltd. is seeking a Python-focused security engineer to design, develop, and maintain secure Python applications. You will implement secure coding practices, identify and remediate vulnerabilities, and perform security testing across the development lifecycle.

The role involves integrating security checks into CI/CD, developing automation tools for security testing, and collaborating with security and development teams to strengthen application defenses.

Qualifications

• Strong proficiency in Python programming and scripting.
• Experience with Python frameworks Django, Flask, or FastAPI.
• Knowledge of OWASP Top 10 vulnerabilities and mitigation techniques.
• Experience with REST API security and secure web application development.
• Understanding of authentication protocols (OAuth 2.0, OpenID Connect, JWT).
• Experience with secure coding practices and vulnerability remediation.

Responsibilities

• Design, develop, and maintain secure Python applications.
• Implement secure coding practices to prevent vulnerabilities.
• Identify and remediate security vulnerabilities in Python-based apps.
• Perform application security assessments, code reviews, and testing.
• Integrate security checks into CI/CD pipelines and workflows.
• Develop Python scripts/tools for security testing and reporting.
• Address OWASP Top 10 vulnerabilities (SQLi, XSS, broken access).
• Implement secure authentication, authorization, session management, and access controls.
• Work with security teams on SAST/DAST/SCA activities.
• Assess third-party libraries for known vulnerabilities.
• Implement secure API development practices with input validation and rate limiting.
• Support vulnerability remediation, audits, and compliance.
• Collaborate with devs, DevOps, QA, and security teams to improve app security.

Skills

Python programming

Django/Flask/FastAPI

Secure SDLC

OWASP Top 10

REST API security

OAuth/OpenID/JWT

Git/Linux

CI/CD pipelines

Docker/Kubernetes

Tools

SonarQube

Snyk/Burp/OWASP ZAP

Semgrep

Cloud security fundamentals

Job description

Key Responsibilities

• Design, develop, and maintain secure applications using Python.
• Implement secure coding practices to prevent common application vulnerabilities.
• Identify, analyze, and remediate security vulnerabilities in Python-based applications.
• Perform application security assessments, code reviews, and security testing.
• Integrate security checks into CI/CD pipelines and development workflows.
• Develop Python scripts and automation tools for security testing, vulnerability analysis, and reporting.
• Identify and address vulnerabilities related to OWASP Top 10, including SQL injection, cross-site scripting (XSS), broken access control, and security misconfiguration.
• Implement secure authentication, authorization, session management, and access controls.
• Work with security teams to perform Static Application Security Testing (SAST), Dynamic Application Security Testing (DAST), and Software Composition Analysis (SCA).
• Assess third-party libraries and dependencies for known security vulnerabilities.
• Implement secure API development practices, including input validation, rate limiting, and proper error handling.
• Support vulnerability remediation, security audits, and compliance requirements.
• Collaborate with developers, DevOps engineers, QA teams, and security professionals to improve application security.

Required Technical Skills

• Strong proficiency in Python programming and scripting.
• Experience with Python frameworks such as Django, Flask, or FastAPI.
• Good understanding of application security principles and secure software development practices.
• Knowledge of OWASP Top 10 vulnerabilities and mitigation techniques.
• Experience with REST API security and secure web application development.
• Understanding of authentication protocols such as OAuth 2.0, OpenID Connect, and JWT.
• Knowledge of SQL injection, XSS, CSRF, SSRF, insecure deserialization, and broken access control.
• Experience with application security testing and vulnerability remediation.
• Familiarity with Git, Linux, and CI/CD pipelines.
• Knowledge of encryption, hashing, secrets management, and secure configuration.
• Understanding of HTTP/HTTPS, TLS, cookies, sessions, and web application architecture.

Preferred Skills

• Experience with security tools such as SonarQube, Bandit, Semgrep, Snyk, Burp Suite, or OWASP ZAP.
• Familiarity with SAST, DAST, and SCA tools.
• Experience automating security testing using Python.
• Knowledge of Docker, Kubernetes, and cloud security fundamentals.
• Familiarity with AWS, Azure, or GCP security services.
• Understanding of threat modeling and security risk assessment.
• Knowledge of DevSecOps practices and security integration into CI/CD pipelines.
• Familiarity with compliance standards such as ISO 27001, SOC 2, or PCI DSS.