Senior Platform Engineer (API & Gateway - Data & AI Platform)

We are seeking a Senior Platform Engineer to design and build the API and Gateway layer that unifies our Data & AI Platform, transforming a fragmented service landscape into one coherent, secure, and observable product.

Responsibilities

• Design and build APIs and SDKs on top of distributed platform services using Python/FastAPI
• Define REST/async API design standards, versioning strategies, and contract testing practices
• Develop client libraries that provide consistent, reliable access to platform services
• Architect and maintain a gateway layer that fronts platform services and removes direct fragmented access
• Establish orchestration and routing patterns that converge independent services into one cohesive product
• Implement RBAC/ABAC least-privilege authorization models at the gateway level
• Manage identity and token flows, including managed/workload identity and delegation, to keep downstream services simple
• Build and maintain CI/CD pipelines using Azure DevOps or GitHub Actions with a test-first delivery approach
• Produce clear service contracts and documentation to support platform adoption
• Integrate services across Azure and GCP, leveraging private endpoints for secure service-to-service communication
• Implement observability practices using OpenTelemetry, Prometheus, Loki, Tempo, and Grafana to ensure end-to-end visibility
• Use metrics, traces, and logs to debug and tune performance in production environments

Requirements

• 5+ years of experience in platform or software engineering, with expert-level proficiency in Python
• Hands-on experience building APIs and SDKs on top of distributed services, including client libraries
• Proficiency in FastAPI, REST/async design, API versioning, and contract testing
• Expertise in designing gateway architectures, including orchestration, API integration, and consistent routing
• Knowledge of IAM concepts including RBAC/ABAC least-privilege models, managed/workload identity, and token delegation flows
• Hands-on experience with Azure and GCP, including private endpoints and multi-cloud service-to-service integration
• Skills in CI/CD and automation using Azure DevOps or GitHub Actions
• Familiarity with observability tooling such as OpenTelemetry, Prometheus, Loki, Tempo, and Grafana
• Ability to translate a fragmented service landscape into one coherent, unified product
• English proficiency at B2 level or higher

We offer

• We gather like-minded people:
• • Top tech minds driving innovation in AI, cloud and digital platform modernization
    • Supportive team and agile, startup-like culture
    • Hybrid by design mode and opportunity to work remotely within Poland
    • Chance to work abroad for up to 60 days annually
    • Business-driven relocation opportunities
• We provide growth opportunities:
• • Career development programs
    • Thought leadership, mentoring, soft skills and well-being programs
    • Certification (Anthropic, Gemini, GCP, Azure, AWS)
    • English classes
• We cover it all:
• • Stable pay
    • Participation in the Employee Stock Purchase Plan with a 15% discount
    • Benefits package (health insurance, multisport, shopping vouchers)
    • Referral bonuses up to $2,000
    • Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
    • Corporate, social and well-being events
• Please, note:
• • Benefits listed above are available to employees only
    • We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
    • We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.