About this role
Project description
The programme is building a resilient, secure, production-grade platform of Python backend services, REST APIs, asynchronous processing components and external integrations, backed by MongoDB and delivered through a React/TypeScript operational user interface with auditable operations and role-based enterprise user journeys. As a Python backend developer with MongoDB exposure, you will design and deliver well-structured, testable, asynchronous backend services and APIs for the platform, with a full-stack delivery mindset – owning features from data model through API to UI.
Responsibilities
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Design well-structured, testable backend services and APIs with clean module boundaries and separation of concerns.
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Build asynchronous services with FastAPI/Uvicorn and Pydantic-based data modelling.
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Apply SOLID, object-oriented design and pragmatic design patterns (factory, strategy, repository, adapter, state, saga, outbox, CQRS).
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Drive design through TDD with strong unit and integration coverage of business-critical paths.
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Engineer resilience for external dependencies: circuit breakers, retry with exponential backoff and jitter, bulkheads, timeouts and stale-data fallback.
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Build security into the control flow: OAuth2/OIDC, mTLS, RBAC, maker-checker, secrets management.
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Integrate REST APIs with OAuth2 bearer flows, retries, idempotency and error mapping.
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Own features end-to-end from data model through API to UI, using Git/GitLab and CI pipelines.
Skills
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Must have
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Years of experience: 8+
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Strong Python service design: type hints, clean module/package boundaries, separation of concerns.
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Async Python (asyncio, async HTTP clients) and FastAPI/Uvicorn with Pydantic.
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SOLID principles, object-oriented service design and design patterns in practice.
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Test-driven development (TDD).
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REST API integration: OAuth2 bearer flows, retries, exponential backoff, idempotency, error mapping.
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Concurrency and distributed-systems correctness: sagas, outbox, FSMs, idempotency, eventual consistency.
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Full-stack delivery mindset.
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Git/GitLab, automated testing and CI pipelines.
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MongoDB (or comparable NoSQL): data modelling, pymongo/Motor, transactions/replica sets, CQRS read models.
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React + TypeScript SPA: components, state management (TanStack Query / Redux Toolkit), API integration.
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Containers & Kubernetes/OpenShift: stateless services, config/secrets, leader election in a CaaS environment.
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Schedulers/workers (Celery, APScheduler, Temporal, Airflow) and leader-election/queue patterns.
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Nice to have
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Payments or RTGS/SWIFT domain experience.
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Other
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Languages
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English: C1 Advanced
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Seniority
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Senior