Senior Backend Engineer

Permhunt; Manila; On-site; PHP 1,500,000 - 2,700,000; Full time

Job summary

Permhunt is seeking a Senior Backend Engineer to design and develop secure, scalable APIs and data services for a modern B2B SaaS platform. You will primarily work with Python and SQL on Azure, building dependable integrations with platforms like HubSpot, Outlook/SMTP, and OpenAI.

You will collaborate with product and cross-functional teams to deliver the roadmap, implement secure authentication, multi-tenant architectures, and maintain resilient pipelines using Celery/Redis, while ensuring

Qualifications

• Bachelor's or Master's degree in Computer Science or related field (or equivalent practical experience).
• 5+ years of production backend experience with Python (Django/DRF or FastAPI) and SQL.
• Experience designing RESTful APIs and asynchronous workers (Celery/Redis).
• Hands-on with Microsoft Azure services (App Service, AD/OIDC, Key Vault, Azure SQL).
• Proficient in testing, CI/CD (pytest, GitHub Actions), and code reviews.

Responsibilities

• Lead backend development for a B2B SaaS platform with Django/FastAPI REST APIs.
• Implement secure authentication/authorization (Azure AD SSO, RBAC) and multi-tenant architectures.
• Build and maintain asynchronous pipelines (Celery/Redis) for file processing and orchestration.

Skills

Python

Django/DRF

REST APIs

Azure

Security best practices

Education

Bachelor's or Master's in CS

Tools

Azure

Azure SQL

App Insights

OpenTelemetry

Celery/Redis

Job description

Our client is the leading insights company, using market-leading data to drive better marketing decisions for global companies. They are growing their engineering team and investing heavily in their SaaS platform.

About the role

They are looking for a Senior Backend Engineer with strong expertise to design and develop secure, scalable APIs and data services for a modern B2B SaaS platform. The role primarily involves working with Python and SQL on Azure, building dependable integrations (e.g., HubSpot, Outlook/SMTP, OpenAI), and collaborating closely with product and cross-functional teams to deliver the roadmap.

Responsibilities

• Lead backend development for a next-gen B2B SaaS platform, creating Django/FastAPl REST APIs thatsupport a React SPA behind an application gateway with WAF protection,
• Implement secure authentication and authorization (Azure AD SSO, optionally Okta), role-based accesscontrol, and multi-tenant architectures.
  
• Build and maintain resilient asynchronous pipelines (Celery/Redis) for file processing and joborchestration, with job status and progress exposed to the Ul.
  
• Integrate with external platforms such as HubSpot (REST/webhooks), Outlook/SMTP for notifications,and OpenAl APIs for workflow automation.
  
• Design and manage database schemas in Azure SQL; handle artifacts and results in Azure Blob Storagewith proper retention and data lineage.
  
• Ensure backend services are performant, scalable, and reliable; profile and optimize Python code andSQL queries.
  
• Implement observability using structured logging, metrics, tracing (App Insights, Azure Monitor,OpenTelemetry), and contribute to runbooks, SLAs, and SLOs.
  
• Write clean, maintainable, and well-tested code; actively participate in code reviews and elevateengineering standards.
  
• Stay up to date with backend, security, and Azure best practices; contribute to threat modeling andsecurity hardening initiatives.

Qualifications / Requirements

• Bachelor's or Master's degree in Computer Science or related field (or equivalent practical experience).5+ years of experience developing production backend systems with Python (Django/DRF or FastAPl)and SQL
  
• Proven experience designing and managing RESTful APIs and asynchronous workers (Celery/Redis),including handling retries, idempotency, and monitoring.
  
• Preferably with hands-on experience with Microsoft Azure services such as App Service, Application Gateway + WAF,Azure AD/OIDC, Key Vault, Azure SQL Blob Storage, and Monitor/App Insights.
  
• Strong experience integrating third-party platforms (e.g., HubSpot APIs/webhooks, SMTP/Outlook,OpenAl APIs).
  
• Solid data modeling and query optimization skills; comfortable with schema migrations andperformance troubleshooting.
  
• Proficient in testing and CI/CD processes (pytest, Git/GitHub, GitHub Actions), and experienced withcode reviews and documentation.
  
• Good understanding of security best practices (OWASP, secrets management, RBAC, encryption atrest/in transit) and awareness of GDPR compliance.
  
• Excellent problem-solving abilities; proactive, resourceful, and able to take ownership in a fast-pacedenvironment
  
• Experience in startups or scale-ups is highly desirable.