Senior ASP.net Backend Developer

Guerilla 360 Integrated Solutions; Makati; Hybrid; PHP 1,500,000 - 2,300,000; Full time

Benefits offered by this job

Hybrid work in Makati

Competitive salary + bonus

Career growth opportunities

Wellness program

Training & certifications

Job summary

Guerilla 360 Integrated Solutions in Makati, Philippines, is seeking a Senior .NET Backend Developer to lead backend systems for real-time financial transactions. You will architect event-driven microservices, mentor engineers, and collaborate with DevOps on Docker/Kubernetes deployments.

The role emphasizes scalability, concurrency, and secure coding practices, with a hybrid work arrangement and ASAP start date. You will shape critical backend systems used by thousands of users daily.

Qualifications

• 8+ years of .NET backend development experience.
• Expertise in event-driven microservices with Kafka or RabbitMQ.
• Strong knowledge of multi-threading, concurrency, and distributed systems.
• Proficiency in async/await, TPL, and DI/SOLID patterns.
• Experience with SQL Server or PostgreSQL; NoSQL knowledge is a plus.
• Experience with Docker and Kubernetes; cloud services (AWS/Azure) is a plus.
• Ability to mentor and lead backend engineers.
• Familiarity with secure coding and API security.

Responsibilities

• Architect and build high-performance .NET microservices.
• Ensure scalability, fault tolerance, and observability.
• Design real-time processing pipelines with Kafka/RabbitMQ.
• Collaborate with DevOps for containerization and cloud deployments.
• Mentor teammates and conduct code reviews.
• Optimize database interactions and indexing.
• Drive quality with unit tests and SOLID principles.

Skills

C#/.NET

ASP.NET Core

Event-driven architecture

Multi-threading/concurrency

SQL/NoSQL databases

Unit testing

DI/SOLID practices

Mentoring/leadership

Tools

Kafka

RabbitMQ

Docker

Kubernetes

SQL Server

PostgreSQL

NoSQL databases

Job description

Work Arrangement - Hybrid, 3 days a week in Makati, the remaining days are work from home

Start Date - ASAP

Interview Stages:

• 1 Online Technical Test
• 2 Video Call Interviews with IT Director and Project Leader
• Job Offer

We are seeking a highly skilled Senior .NET Backend Developer to drive the backend development of our high-performance platform. This role requires deep expertise in event-driven microservices architecture, high-concurrency handling, and asynchronous processing to ensure seamless and secure financial transactions at scale.

You will work closely with cross-functional teams to design, optimize, and scale a system that processes high volumes of real-time transactions while maintaining reliability and performance. This is an opportunity to take ownership of a mission-critical backend system that directly impacts thousands of users daily.

Key Responsibilities

• Architect, develop, and optimize high-performance .NET microservices for an event-driven system.
• Ensure scalability, resilience, and fault tolerance in a high-throughput environment.
• Implement asynchronous programming, concurrency control, and efficient data handling to maintain system integrity under heavy load.
• Design and manage Kafka (or similar event-driven messaging systems) for real-time data processing.
• Utilize best practices in dependency injection, unit testing, and SOLID principles to create maintainable code.
• Lead and mentor backend engineers, fostering a culture of technical excellence.
• Collaborate with DevOps teams for containerization (Docker, Kubernetes) and cloud-based deployments (AWS/Azure).
• Optimize database interactions using custom ORM solutions, caching strategies, and indexing.
• Troubleshoot performance bottlenecks and improve system observability with distributed tracing and monitoring tools.

What We're Looking For

• 8+ years of experience in .NET backend development (C#, ASP.NET Core, Web API).
• Expertise in event-driven microservices architecture using Kafka, RabbitMQ, or similar technologies.
• Deep understanding of multi-threading, parallelism, and concurrency control in distributed systems.
• Strong experience with Task Parallel Library (TPL), async/await, and thread synchronization techniques.
• Proficiency in SQL Server, PostgreSQL, or NoSQL databases, with knowledge of indexing and query optimization.
• Experience with dependency injection (DI), SOLID principles, and unit testing frameworks.
• Familiarity with containerization (Docker, Kubernetes) and cloud services (AWS, Azure).
• Strong understanding of secure coding practices, API security, and authentication mechanisms.
• Ability to mentor junior developers and conduct technical design reviews.

Nice-to-Have

• Experience with gRPC, SignalR, or WebSockets for real-time communication.
• Familiarity with Domain-Driven Design (DDD) and CQRS patterns.
• Knowledge of CI/CD pipelines, Terraform, and Infrastructure as Code (IaC).

What We Offer at Guerilla 360 Integrated Solutions

• Be Part Of a Globally Award-Winning Team - G2 High Performer 2025, Monday.com Gold Partner, Partner of the Year 2024, Glassdoor Top Rated Company as voted by Employees, The Financial Times High Tech Growth Company in Asia Pacific
• Competitive salary plus a performance-based bonus
• Work remotely from any location
• System where you can advance the release of your salary and withdraw it real time
• Opportunities for professional growth and advancement within the company
• Extensive Mental Health and Wellness package from the comfort of your home - daily yoga, daily meditation, weekly martial arts class, weekly hi-intensity exercises classes, weekly zumba and dance classes
• Fun virtual activities to meet your international teammates - game nights, clubs, trivia competitions, AI contests
• A collaborative, innovative, and supportive work environment
• Comprehensive training on our products and continuous learning opportunities
• Opportunities for certifications and licensures to boost your career