API Developer

Randstad; Kraków; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Hybrid work

Long-term extension prospects

Job summary

Randstad Polska Sp. z o.o. is seeking an experienced API Developer to engineer robust, enterprise-grade integrations within a scalable Microsoft Azure ecosystem.

You will design, build, and secure serverless APIs using Azure Functions and APIM, connecting distributed systems. The role requires 7+ years of hands-on Azure development, strong messaging experience, and a collaborative mindset to work with stakeholders in a hybrid Kraków-based team.

Qualifications

• 7+ years of hands-on Azure development experience.
• Experience building enterprise integrations with Azure Functions and Service Bus.
• Knowledge of endpoints configuration and management via Azure API Management (APIM).
• Hands-on monitoring using Application Insights for tracing and metrics.
• Strong unit testing and testable design practices.
• Proactive problem-solving with agility in dynamic environments.
• Excellent written and verbal English communication; capable of presenting to leadership.
• Collaborative mindset and ability to partner across teams.

Responsibilities

• Design, build, and maintain scalable APIs and event-driven backends using Azure Functions.
• Enable decoupled communication across distributed enterprise systems with Azure Service Bus.
• Configure, govern, and secure APIs via Azure API Management (APIM).
• Monitor telemetry and performance with Application Insights.
• Write clean, modular code with comprehensive unit/integration tests.
• Collaborate with stakeholders and engineering teams to provide architectural recommendations.

Skills

Azure Functions

Azure Service Bus

Azure API Management

Application Insights

Unit Testing

Problem Solving

English Communication

Team Collaboration

Job description

We are looking for an experienced API Developer to engineer and optimize robust, enterprise-grade integration solutions across a scalable Microsoft Azure ecosystem. In this role, you will architect, build, and secure event-driven serverless APIs, connecting distributed systems using Azure Functions, Azure Service Bus, and Azure API Management (APIM).

If you bring 7+ years of hands‑on Azure application engineering, deep expertise in message-driven integrations, and a passion for writing clean, testable, high‑performance code, we want to hear from you.

What will your tasks involve?

• API & Serverless Development: Design, build, and maintain robust, scalable APIs and event-driven backends utilizing Azure Functions.
• Enterprise Integration: Implement seamless, decoupled communication between distributed enterprise systems using Azure Service Bus (topics, queues, and message routing).
• API Management & Governance: Configure, manage, and enforce API policies, security, and rate‑limiting using Azure API Management (APIM).
• Observability & Performance: Leverage the full suite of Application Insights features to monitor telemetry, profile API latency, diagnose errors, and drive proactive optimizations.
• Testing & Quality Assurance: Write clean, modular, and maintainable code backed by comprehensive unit and integration tests.
• Technical Advisory & Collaboration: Act as an agile problem‑solver, collaborating closely with key stakeholders, cross‑functional engineering teams, and preparing actionable architectural recommendations for senior management.

What we expect from you?

Requirements (Must-Have):

• Azure Application Engineering: At least 7 years of hands‑on software development experience within the Microsoft Azure platform.
• Serverless & Messaging Expertise: Proven track record building enterprise integrations using Azure Functions and Azure Service Bus.
• API Gateway & Management: Practical knowledge and working experience configuring and managing endpoints via Azure API Management (APIM).
• Application Monitoring: Hands‑on expertise using Application Insights for advanced monitoring, distributed tracing, and metric collection.
• Testing Discipline: Strong, practical experience writing unit tests and designing for testability.
• Problem Solving & Agility: Innovative problem‑solving mindset with the agility to adapt and think on your feet in dynamic environments.
• Communication & Stakeholder Management: Excellent written and verbal English communication skills, with proven ability to craft and present technical recommendations to senior leadership and engineering partners.
• Collaborative Mindset: Strong team player driven to deliver high‑quality results while fostering productive partnerships across teams.

Nice-to-Have:

• Familiarity with CI/CD automation pipelines (Azure DevOps / GitHub Actions).
• Experience with Infrastructure as Code (Terraform, Bicep, or ARM templates).
• Knowledge of cloud security standards (OAuth2, OpenID Connect, Azure Key Vault).

What you can expect from us?

• Contract: B2B model.
• Work-Life Balance & Flexibility: Predictable hybrid arrangement (only 2 days per week in our modern Kraków office, paired with remote flexibility).
• Enterprise Scale: Direct impact on high-throughput, mission‑critical integration workflows within an international cloud environment.
• Duration: 6-month initial contract with strong prospects for long‑term project extension.

this job offer is intended for people over 18 years of age