Senior Platform Engineer (API & Gateway)

Quick Facts

• Role: Senior Platform Engineer (API & Gateway) for the Data & AI Platform

Description

Design and build the API and gateway layer that unifies a Data & AI Platform, turning a fragmented services landscape into one coherent, secure, and observable product. Build APIs and SDKs with FastAPI/Python, define API standards (REST/async, versioning, contract testing), and develop a gateway that removes direct access to underlying services. Implement orchestration, least-privilege authorization (RBAC/ABAC), identity/token flows, secure multi-cloud service connectivity, CI/CD pipelines, and end-to-end observability.

Responsibilities

• Design and build APIs and SDKs using Python/FastAPI

• Define REST/async API standards, versioning strategies, and contract testing practices

• Develop client libraries for consistent access to platform services

• Architect and maintain an API gateway that fronts platform services

• Implement orchestration and routing patterns to converge independent services into one product

• Implement RBAC/ABAC least-privilege authorization at the gateway

• Manage identity and token flows (managed/workload identity and delegation)

• Build and maintain CI/CD pipelines with test-first delivery using Azure DevOps or GitHub Actions

• Produce service contracts and documentation for platform adoption

• Integrate services across Azure and GCP using private endpoints

• Implement observability using OpenTelemetry, Prometheus, Loki, Tempo, and Grafana

• Use metrics, traces, and logs to debug and tune performance in production

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 gateway architecture (orchestration, API integration, consistent routing)

• Knowledge of IAM concepts including RBAC/ABAC least-privilege models, managed/workload identity, and token delegation

• 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 services landscape into a unified product

• English proficiency at B2 level or higher

Benefits

• Hybrid by design mode and opportunity to work remotely within Poland

• Chance to work abroad for up to 60 days annually

• Career development programs, mentoring, and soft skills/well-being programs

• Certifications (Anthropic, Gemini, GCP, Azure, AWS)

• English classes

• Stable pay and participation in an Employee Stock Purchase Plan with a 15% discount

• Health insurance, Multisport, and shopping vouchers

• Referral bonuses up to $2,000

• Office benefits (entertainment/relaxation zones, table tennis/football, free snacks and coffee)

• Corporate, social, and well-being events

• Option to work with contractors (B2B terms agreed individually)