Full Stack Engineer (NestJS Backend & Next.js Frontend) at Lorgarithm

Position Overview:

• We are seeking five (5) highly skilled Full Stack Engineers who are proficient in both backend development with NestJS and frontend development with Next.js. The ideal candidates will have a strong foundation in algorithms and a deep understanding of modern web technologies. These engineers will be responsible for building and maintaining a complex system that includes video calling, payment processing, and various AWS and Kubernetes services.

Key Responsibilities

Backend Development (NestJS):

• Design and implement backend services using NestJS.
• Develop and manage WebRTC signaling servers for video call management.
• Integrate with TURN/STUN servers (Coturn) for optimal video call performance.
• Implement secure and scalable payment processing systems using Stripe, Interswitch, or Flutterwave.
• Ensure the security of sensitive data using Vault by HashiCorp.
• Frontend Development (Next.js):
• Develop and maintain high-performance web applications using Next.js.
• Collaborate with designers to create user-friendly and responsive UIs.
• Optimize frontend performance to ensure a seamless user experience during video calls and payment processing.

Microservices & Orchestration:

• Develop and deploy microservices architecture using Kubernetes for managing real-time online market services.
• Implement and manage StatefulSets for Cassandra to ensure seamless database integration.
• Deploy and monitor chat services using AWS EC2/ECS for optimal performance and scalability.
• Utilize Istio or Linkerd as a service mesh for microservices management and security.

Monitoring & Logging:

• Implement monitoring solutions using Prometheus and Grafana to track performance metrics.
• Set up and manage logging infrastructure using the ELK Stack (Elasticsearch, Logstash, Kibana).
• Ensure that the system is highly observable with real-time metrics and alerts.

Video Calling Infrastructure:

• Deploy and manage WebRTC signaling servers on AWS EC2/ECS.
• Utilize Elastic Load Balancing for distributing WebRTC connection requests.
• Implement auto-scaling using Kubernetes to handle varying call volumes.
• Store and manage video call metadata and logs using Cassandra, and store recorded video calls in S3.

Payment Processing Infrastructure:

• Implement and integrate secure payment processing using Node.js or NestJS.
• Deploy payment services on AWS EC2/ECS, ensuring high availability with Kubernetes. - Manage transaction records and payment logs using RDS (MySQL/PostgreSQL).
• Use AWS Lambda for integrating with payment gateways and processing transactions efficiently.

Cloud Infrastructure & Kubernetes:

• Deploy, manage, and scale services using Kubernetes for both video calling and payment processing.
• Implement auto-scaling, load balancing, and security best practices.
• Utilize AWS services (EC2, ECS, Lambda, S3) for deploying and maintaining robust, scalable systems.
• Algorithm Development & Optimization:
• Develop and optimize algorithms for real-time communication and secure transactions. - Ensure low-latency and high-performance across all services.
• Collaborate with the team to solve complex problems using efficient algorithms and data structures.

Collaboration & Teamwork:

• Work closely with other engineers, designers, product managers, and DevOps to deliver end-to-end solutions.
• Participate in code reviews, contribute to continuous improvement initiatives, and mentor junior developers.

Required Qualifications

Experience:

• Minimum 5 years of experience in backend development with NestJS.
• Proven minimum 4 years of experience in frontend development with Next.js.
• Strong algorithmic problem-solving skills.
• Extensive experience with AWS services, including EC2, ECS, S3, and Lambda. - Proficiency in Kubernetes for deploying and scaling applications.
• Experience with WebRTC, Coturn, and video calling infrastructure.
• Familiarity with payment processing systems like Stripe, Interswitch, and Flutterwave.
• Technical Expertise:
• Strong knowledge of NestJS, with a focus on building secure and scalable services.
• Experience with Cassandra and RDS for database management.
• Proficient in modern frontend development practices, including server-side rendering with Next.js.
• Experience with containerization and orchestration using Docker and Kubernetes.
• Other Skills:
• Excellent communication and collaboration skills.
• Ability to work in a fast-paced, agile environment.
• Strong commitment to quality and continuous improvement.

Preferred Qualifications

• Experience with CI/CD pipelines and automated testing.
• Knowledge of security best practices in cloud environments.
• Experience with real-time communication technologies beyond WebRTC.