Backend Engineer (Scalability \& AWS)
Company: Fully Funded Startup ready to go
Team: Engineering
Start: ASAP
Type: Full-time (or strong long-term contract)
Location: Remote – Toronto / North America preferred
Level: Senior (open to exceptional mid-level with ownership experience)
About The Role The client is growing from MVP to a high-traffic production platform. We’re looking for a Senior Backend Engineer to own backend scalability and lead our AWS migration path as usage and execution volume increase.
You will be responsible for building a reliable, secure, and cost-efficient backend runtime for AI-driven workloads. This role has real ownership: APIs, data, infrastructure decisions, and production reliability.
What You’ll Do
Own and execute an incremental AWS migration strategy for backend services and execution workloads
Design and operate job orchestration systems using queues and workers (sync \& async execution)
Concurrency control, retries, DLQs, idempotency
Build and evolve core platform APIs, including:
Marketplace, purchases and entitlements
Run lifecycle (create, status, cancel, retry)
Integrations and signed artifact delivery (e.g. S3 downloads)
Own the data layer:
PostgreSQL (RDS or Aurora)
Schema design, indexing, migrations, replicas, backups
Improve platform reliability and operations:
Load and capacity testing
Observability (logs, metrics, traces)
Alerting and on-call readiness
Rate limiting and caching (Redis / ElastiCache)
Security best practices (IAM least privilege, Secrets Manager, KMS)
Technical Requirements
Strong backend experience in at least one of:
TypeScript / Node.js (preferred)
Go, Python, or Java
(NestJS, Fastify, Express, or equivalent frameworks)
Proven experience building reliable distributed systems:
Timeouts, retries, idempotency, backpressure
Load and capacity testing
Hands-on AWS experience, including:
Compute: ECS or Fargate (Lambda a plus)
Networking: VPC and IAM basics
Data \& messaging: RDS, S3, SQS
Monitoring: CloudWatch and observability tooling
Experience designing multi-tenant APIs and async job systems
Strong SQL fundamentals and performance tuning experienceNice to Have
Infrastructure as Code (Terraform or AWS CDK)
Container orchestration experience (ECS or EKS)
Experience operating AI / LLM workloads cost-effectively:
Quotas, caching strategies, fallbacks
Job Types: Full-time, Permanent
Pay: $80,000.00-$100,000.00 per year
Application question(s):
What's your earliest start date?
What's your email and phone number to be used for a potential interview?
Are you happy with the salary range of 80-100k CAD (gross) per annum?
Are you happy working fully onsite in the city centre of Toronto?
Do you have the right to work in Canada?
Work Location: In person