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Senior Backend Engineer (Python or C#)

CapitalSage Holdings

Job Location:

Lagos - Nigeria

Salary: Not provided by the employer

Experience Required: 5years

Posted: 8 June 2026 (30+ days ago)

Application Deadline: 5 September 2026

Vacancies: 1 Vacancy

Job Summary

We are looking for experienced Senior Backend Engineers to design build and scale highly available financial services platforms. The ideal candidate must have strong experience in microservices architecture distributed systems API development and high-volume transaction processing within FinTech Banking Payments or related industries.

Key Responsibilities

Design develop and maintain scalable backend services and APIs.
Build and manage microservices-based architectures.
Develop secure and high-performance financial transaction systems.
Collaborate with product mobile frontend QA and DevOps teams.
Implement automated testing CI/CD and observability best practices.
Optimize application performance reliability and scalability.
Participate in architecture reviews and technical decision-making.
Mentor junior and mid-level engineers.

Requirements

Technical Requirements

Python Track

Strong experience with:

Python
Django and/or FastAPI
Django REST Framework
Celery

C# Track

Strong experience with:

C#
.NET 8/9/10
Core
Entity Framework Core

Core Requirements (Both Tracks)

Strong understanding of Microservices Architecture.
Strong understanding of system design
REST API and Event-Driven Architecture experience.
PostgreSQL or other enterprise SQL databases.
RabbitMQ and/or Apache Kafka.
Docker and containerization.
CI/CD pipelines and Git workflows.
Test-Driven Development (TDD).
Caching technologies (Redis preferred).
Authentication and authorization (JWT OAuth2 OpenID Connect).
API security and secure coding practices.
Cloud platform experience (AWS GCP or Azure).

Qualifications

in Computer Science Computer Engineering Electrical & Electronics Engineering or related discipline.
Minimum of 5 years backend engineering experience.
FinTech Banking Payments Digital Banking Core Banking or Financial Services experience is highly preferred.

Nice to Have

Kubernetes experience.
Event Sourcing and CQRS.
OpenAPI/Swagger.
Infrastructure as Code (Terraform).
Observability tools (Prometheus Grafana ELK/OpenSearch).
PCI-DSS ISO 27001 or financial regulatory compliance exposure.

What We Look For

Strong problem-solving and analytical skills.
Ability to thrive in fast-paced environments.
Ownership mentality and attention to detail.
Excellent communication and collaboration skills.
Passion for building scalable secure and resilient systems.

Benefits

Industry Standard

Required Skills:

Technical Requirements Python Track Strong experience with: Python Django and/or FastAPI Django REST Framework Celery C# Track Strong experience with: C# .NET 8/9/10 Core Entity Framework Core Core Requirements (Both Tracks) Strong understanding of Microservices Architecture. Strong understanding of system design REST API and Event-Driven Architecture experience. PostgreSQL or other enterprise SQL databases. RabbitMQ and/or Apache Kafka. Docker and containerization. CI/CD pipelines and Git workflows. Test-Driven Development (TDD). Caching technologies (Redis preferred). Authentication and authorization (JWT OAuth2 OpenID Connect). API security and secure coding practices. Cloud platform experience (AWS GCP or Azure). Qualifications in Computer Science Computer Engineering Electrical & Electronics Engineering or related discipline. Minimum of 5 years backend engineering experience. FinTech Banking Payments Digital Banking Core Banking or Financial Services experience is highly preferred. Nice to Have Kubernetes experience. Event Sourcing and CQRS. OpenAPI/Swagger. Infrastructure as Code (Terraform). Observability tools (Prometheus Grafana ELK/OpenSearch). PCI-DSS ISO 27001 or financial regulatory compliance exposure. What We Look For Strong problem-solving and analytical skills. Ability to thrive in fast-paced environments. Ownership mentality and attention to detail. Excellent communication and collaboration skills. Passion for building scalable secure and resilient systems.

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