Senior Backend Engineer (Python)

CLUST is a venture builder where successful businesses grow.
Young entrepreneurs launch and scale projects within our ecosystem, and specialised professionals realise their professional potential. We aim to work with talented entrepreneurs to learn and turn great ideas into profitable businesses.

Now we’re working with a startup in the Health & Fitness niche — and assembling a powerhouse team to drive real impact. The product’s growing fast — with proven unit economics, positive ROI on key audiences, and a marketing engine built to scale.

We’re looking for a Senior Backend Engineer — someone who will take ownership of serverless backend architecture and help us build a reliable, scalable foundation for our fast-growing product.

Why this role is worth your attention:
— Work with a modern codebase built with up-to-date technologies — no legacy constraints.
— Take part in high-level system design and architectural decisions.
— Contribute to a product that uses AI to meaningfully personalize user experience, turning data into real, tangible value for users.
— Operate in a flat structure with fast decision-making and minimal bureaucracy.
— Build a product that delivers real value and has a measurable impact on users’ lives.
— A professional growth path within backend and infrastructure engineering, with increasing ownership over system design, reliability, and platform-level decisions as the product scales.

What you will do:
— Build and maintain serverless backend services on AWS (Lambda, SQS, RDS).
— Own serverless.yml configuration: deployments, stages, environments, IAM policies.
— Design and evolve asynchronous message-driven workflows
(retries, DLQs, monitoring, failure recovery).
— Optimize PostgreSQL (Amazon RDS) performance and reliability
(indexes, migrations, scaling strategies).
— Implement monitoring and alerting, improve production stability and observability.
— Collaborate closely with frontend and product teams.
— Contribute to architecture and technical decision-making.

What we’re looking for:
— 5+ years of professional software development experience.
— Strong backend expertise with Python (3+ years).
— Hands-on experience with AWS Lambda (function design, packaging, deployment, monitoring, cold starts).
— Skills with Serverless Framework and serverless.yml (stages, variables, IAM roles, plugins, CI/CD).
— Production experience with Amazon RDS (PostgreSQL).
— Confident use of Amazon SQS: standard vs FIFO queues, retries, DLQs, idempotency, visibility timeouts and backpressure patterns.
— Strong understanding of REST API design.
— Observability experience: CloudWatch logs & metrics, alarms, structured logging, basic tracing.
— Deep understanding of security fundamentals: IAM least-privilege approach, secrets management (SSM / Secrets Manager), encryption basics, VPC fundamentals.
— Product mindset and autonomy in decision-making.
— English level: B1 and higher.

Will be a plus:
— Experience integrating payment providers.
— Experience with Google Spreadsheets integrations.

What we offer:
— Fully remote setup with flexible working hours.
— Benefits package (paid vacation, sick leave, and more).
— Support for personal and professional growth.
— Access to a curated corporate knowledge library.

We believe work should have meaning.
At CLUST, you’ll build systems that matter — with people who respect your experience and engineering ideas.

Sounds like a good match?
Send us your CV — we’d be glad to talk.