Salary: £90,000 - 90,000 per year Requirements: SC Clearance or the ability to obtain SC (and later DV) 5 years of professional software engineering experience, with a strong focus on backend development in Python and event-driven architectures Hands-on experience with Palantir Foundry, including working with Foundry APIs, data pipelines, ontologies, or Foundry-based application development Proven experience designing and operating production REST APIs with OpenAPI/Swagger Deep understanding of relational database design, indexing, performance tuning, and migrations (PostgreSQL) Proficiency with containerization (Docker) and Git-based workflows Experience with API versioning, security, documentation strategies, and automated testing Strong problem-solving skills and the ability to work independently with high ownership High-agency engineer who owns outcomes end to end Pragmatic, research-driven approach with a bias to ship and iterate Clear communicator who can talk to stakeholders of varying technical backgrounds Comfortable defining SLAs, making trade-offs explicit, and operating production systems Responsibilities: Design and evolve scalable backend services in Python using FastAPI for high-availability, high-throughput workloads Build well-versioned RESTful APIs aligned to OpenAPI/Swagger, emphasizing strong conventions for consistency, idempotency, and backward compatibility Implement authentication and authorization using OAuth2/OIDC, session management, and fine-grained permissions Design and maintain event-driven architectures and background processing pipelines (e.g. Celery, Redis Streams, Kafka) Design data models and optimize relational databases (PostgreSQL) for performance, partitioning, and horizontal scale Introduce caching, rate limiting, and queuing to meet performance budgets and latency goals Integrate with AI pipelines and model-serving endpoints, including streaming responses, async inference jobs, and robust error/retry semantics Work with Palantir Foundry to build and maintain data pipelines, ontologies, and integrations connecting backend services to Foundry-based analytics and workflows Leverage Foundrys APIs and tooling to support data modeling, transformation, and secure data exchange across the platform Write secure, well-tested code (unit, integration, end-to-end) and uphold coding standards through code reviews Contribute to logging, metrics, and alerting (Prometheus/Grafana, ELK/OpenSearch) Support compliance readiness (ISO 27001, GDPR) through secure-by-default design Collaborate closely with the engineering team, product, and leadership to scope, sequence, and deliver outcomes Translate product requirements into technical plans, breaking work into milestones with measurable success criteria Mentor engineers on backend design and API ergonomics Ship services via Docker containers with clean, minimal builds (optional) Contribute to IaC (Terraform/CloudFormation) and CI/CD pipelines (GitHub Actions/Argo CD) Support cloud operations with sensible defaults, cost awareness, and environment promotion across dev/staging/prod Technologies: AI API OpenSearch Backend CI/CD Cloud Celery Docker ELK FastAPI Git GitHub Grafana Support Kafka OpenAPI PostgreSQL Prometheus Python REST Redis Security Swagger Terraform DevOps More: We are seeking a Senior Backend Engineer with Palantir Foundry experience to help us build systems that make advanced AI usable in the real world. In this role, you will have ownership over backend services, focusing on reliability and API quality within a high-impact environment. We offer a dynamic work culture with rapid career progression and opportunities for personal growth. Our benefits include flexible working hours, a hybrid working model, a company pension with 4% employer contribution, private healthcare, and 29 days of holiday plus public holidays. last updated 17 week of 2026