Full Stack Engineer (NestJS & Next.js)

About the role

Lorgarithm is looking for five highly skilled Full Stack Engineers, proficient in NestJS for the backend and Next.js for the frontend, to build and maintain a complex system covering video calling, payment processing and AWS and Kubernetes services. Candidates who are only proficient in one stack (Next.js or NestJS) are welcome to apply. The position is hybrid: 2 days in the Lagos office and 3 days working remotely.

Key responsibilities

• Backend (NestJS): design and implement backend services, develop WebRTC signaling servers, integrate with TURN/STUN servers (Coturn), and build secure payment processing with Stripe, Interswitch or Flutterwave, protecting sensitive data with Vault by HashiCorp.
• Frontend (Next.js): build high-performance web apps, collaborate with designers on responsive UIs, and optimise performance for video calls and payments.
• Microservices: deploy microservices on Kubernetes, manage Cassandra StatefulSets, run chat services on AWS EC2/ECS, and use Istio or Linkerd as a service mesh.
• Monitoring and logging: set up Prometheus and Grafana, and the ELK stack (Elasticsearch, Logstash, Kibana).
• Video calling infrastructure: deploy WebRTC signaling on AWS EC2/ECS, use Elastic Load Balancing, auto-scaling, Cassandra for metadata and logs, and S3 for recorded calls.
• Payment infrastructure: deploy payment services on AWS EC2/ECS with Kubernetes, manage transaction records in RDS (MySQL/PostgreSQL), and use AWS Lambda for gateway integrations.
• Develop and optimise algorithms for low-latency communication and secure transactions, and mentor junior developers.

Required profile

• Minimum 5 years of backend experience with NestJS and 4 years of frontend experience with Next.js.
• Strong algorithmic problem-solving skills.
• Extensive AWS experience (EC2, ECS, S3, Lambda) and Kubernetes proficiency.
• Experience with WebRTC, Coturn and payment processors such as Stripe, Interswitch and Flutterwave.
• Experience with Cassandra and RDS, and with Docker and Kubernetes.
• Preferred: CI/CD pipelines, automated testing, cloud security best practices, and real-time communication beyond WebRTC.

Required skills

• NestJS, Next.js, Node.js
• AWS (EC2, ECS, S3, Lambda)
• Kubernetes, Docker, WebRTC, Coturn
• Cassandra, RDS (MySQL/PostgreSQL), Vault by HashiCorp
• Prometheus, Grafana, ELK stack

Compensation ranges from 600,000 to 1,000,000 depending on experience.