Senior Backend Engineer

Toogeza
Europe
Remote

Who this role is best for

A natural match if you have experience with Python async frameworks and AI infrastructure scaling.

Best fit for

  • Engineers who have designed multi-agent AI systems and REST APIs with idempotency
    — “Experience designing REST APIs and webhook integrations: idempotency, retries, consistent error handling
  • Individuals comfortable with full-stack cloud deployment on GCP and Kubernetes
    — “Kubernetes at the 'I deploy and debug my own service' level (each service ships its own Helm chart)

Things to consider

  • End-to-end feature delivery from design to monitoring is expected
    — “taking features to production end-to-end: from design to monitoring

How to stand out

  • Highlight async Python projects involving FastAPI and PostgreSQL optimization
    — “5+ years of professional Python development, a solid share of it on an async stack
  • Demonstrate experience with Kubernetes deployments using Helm charts
    — “each service ships its own Helm chart
  • Showcase multi-agent system design or AI workflow integration work
    — “multi-agent AI system to handle different stages of the creative process
  • Emphasize test-driven development with pytest and Testcontainers
    — “A habit of writing tests (unit + integration) and taking features to production end-to-end
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · TeamLevel · Senior

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Built and scaled core AI infrastructure
  • Designed REST APIs and webhook integrations
  • Improved system reliability and performance
  • Experimented with new AI capabilities
  • Designed multi-agent systems
Typical background
5+ years of professional Python developmentDeep understanding of asyncio

Skills & requirements

Required

Python DevelopmentAsyncioFastapiAiohttpStarlettePostgreSQLSchema DesignTransactions And LockingIndexesSlow Query AnalysisREST ApisWebhook IntegrationsIdempotencyRetriesConsistent Error HandlingDockerKubernetesHelmGithub ActionsTestcontainers

Preferred

GCP ExperienceAws/azureTerraformMobile App BillingRevenuecatPaddleApp Store / Google Play SubscriptionsAuth SystemsJWTRefresh Token RotationAPI GatewaysReal-time MessagingWebsocketWorkflow OrchestrationN8nAirflowTemporalCeleryBigQueryAnalytics Pipelines

Stack & domain

PythonFastapiPydanticSqlalchemyPostgreSQLGoogle CloudKubernetesDockerGithub ActionsPytestStructlogGoogle Cloud MonitoringGoogle Cloud LoggingLLMMulti-agent SystemsBackend ServicesREST ApisWebhook IntegrationsPerformance WorkProfilingMetricsLoad TestingTerraformMobile App BillingAuth SystemsReal-time MessagingWorkflow OrchestrationBigQueryAnalytics PipelinesBackend Experience In Mobile ProductsProblem-solvingCollaborationTeamworkArchitectureDesignTestingMonitoringAIVideo ProductionCreative ProcessUser Experience

About the role

Original posting from Toogeza via Ashby

We are toogeza, a Ukrainian recruiting company that is focused on hiring talents and building teams for tech startups worldwide. People make a difference in the big game, we may help to find the right ones.

Currently, we are looking for Senior Backend Engineer for Elva.

Location: Remote

Job Type: Full-Time

ABOUT THE PRODUCT:

We’re building an AI-driven video production platform that transforms ideas, references, and media fragments into structured video content.

The product uses a multi-agent AI system to handle different stages of the creative process — from content analysis and scripting to editing and video production.

It is designed for both professional creators and everyday users, allowing them to go from an initial concept to a finished video with significantly less manual work.

ABOUT THE ROLE:

We’re looking for an engineer who will help build and scale the core AI infrastructure behind the product.

You’ll work on LLM-powered workflows, multi-agent systems, integrations, and backend services that turn user inputs into reliable production pipelines. The role combines hands-on engineering with architectural ownership: designing how agents interact, improving system reliability and performance, and experimenting with new AI capabilities.

You’ll work closely with the product team and have significant influence over both the technical architecture and the quality of the final user experience.

Our stack:

  • Python 3.12, FastAPI, Pydantic, SQLAlchemy 2.0 (async, asyncpg), Alembic
  • PostgreSQL (Cloud SQL)
  • Google Cloud: GKE (Kubernetes + Helm), Cloud Storage, BigQuery, Secret Manager
  • Ory Oathkeeper (API gateway), Centrifugo (real-time), n8n (worker orchestration), KEDA (autoscaling)
  • Docker, GitHub Actions, Artifact Registry
  • pytest (asyncio) + Testcontainers
  • structlog, Google Cloud Monitoring / Logging

What we expect:

  • 5+ years of professional Python development, a solid share of it on an async stack (FastAPI / aiohttp / Starlette); deep understanding of asyncio.
  • Strong PostgreSQL: schema design, transactions and locking, indexes, slow query analysis.
  • Experience designing REST APIs and webhook integrations: idempotency, retries, consistent error handling.
  • Hands-on performance work: profiling, metrics, load testing, and fixing the bottlenecks you find.
  • Docker as a daily tool; Kubernetes at the "I deploy and debug my own service" level (each service ships its own Helm chart).
  • A habit of writing tests (unit + integration) and taking features to production end-to-end: from design to monitoring.

Nice to have:

  • GCP experience (or AWS/Azure with willingness to switch to GCP), Terraform.
  • Mobile app billing: RevenueCat, Paddle, App Store / Google Play subscriptions.
  • Auth systems: JWT, refresh token rotation, API gateways.
  • Real-time messaging (WebSocket), workflow orchestration (n8n, Airflow, Temporal, Celery).
  • BigQuery and analytics pipelines.
  • Backend experience in mobile products.

What’s next?

If this role sounds like a fit — we’d love to hear from you! Just send over your CV and anything else you’d like us to consider.

We’ll review everything within five working days, and if your background matches what we’re looking for, we’ll get in touch to set up a call and get to know each other better.

Source: Toogeza careers (Ashby)

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