Expedier is a digital financial platform on a mission to empower underserved individuals and businesses.

We are recruiting to fill the position below:

Job Title: Senior Backend Engineer

Location: Lagos
Employment Type: Full-time

About the Role

• As a Senior Backend Engineer, you’ll play a key role in designing and maintaining the backend systems that power our financial products.
• You’ll work within a mature Django architecture, owning critical domains.
• Beyond feature development, you’ll help shape engineering standards, improve system architecture, mentor other engineers, and ensure our platform remains scalable, secure, and highly reliable.

Key Responsibilities

• Design, develop, and maintain scalable RESTful APIs using Django REST Framework
• Build versioned APIs with clean architecture and separation of concerns
• Develop and maintain isolated financial domains with strict financial integrity
• Build reusable service layers and shared utilities while keeping business logic encapsulated
• Develop and maintain integrations with payment gateways, banking partners, identity verification providers, communication platforms, and card issuing providers
• Optimize PostgreSQL queries, improve database performance, and design safe migration strategies
• Build scalable asynchronous workflows using Celery and Redis
• Write comprehensive unit and integration tests and maintain high code coverage
• Conduct code reviews and enforce engineering best practices
• Help modernize the platform by moving business logic into explicit service layers and enforcing strong domain boundaries
• Work closely with infrastructure using Docker, AWS (S3, SES), Boto3, and Firebase
• Collaborate cross-functionally with Product, Design, Compliance, and Operations teams

Requirements

• Bachelor’s Degree with 5+ years of professional back-end development experience.
• Expert-level Python (3.12+)
• Strong Django and Django REST Framework experience
• Experience designing large production APIs
• Strong PostgreSQL knowledge and advanced Django ORM experience
• Database optimization and migration experience
• Experience building asynchronous systems with Celery and Redis
• Experience integrating third-party APIs
• Strong understanding of REST API architecture
• Experience writing automated tests using Django Test Client, factory_boy, and model_bakery
• Hands-on Docker experience
• Experience working with AWS services including S3 and SES
• Experience using Firebase
• Strong understanding of software architecture, clean code, and design patterns

Nice to Have:

• Fintech experience
• Experience with wallet systems, double-entry ledgers, payment gateways, card issuing platforms, and banking integrations
• CI/CD pipeline experience
• Monitoring, observability, logging, and distributed tracing experience
• Experience mentoring engineers and leading code reviews.

Salary
N550,000 monthly.

Application Closing Date
10th September, 2026.