Backend Developer for WK

We’re hiring a Backend Engineer to design and build secure, scalable backend services on

Microsoft Azure

, with a strong emphasis on

data modeling

,

API development

, and

serverless compute

using

Azure Functions

. You’ll work closely with product and front-end partners to deliver reliable APIs, integrate with

Microsoft SQL Server on Microsoft Fabric

, and implement robust

authentication/authorization

and

API usage metering/billing

. This role is ideal for someone who enjoys building well-structured systems, taking ownership of backend reliability, and applying strong security and engineering practices.

The role is outcome-focused: you’ll be expected to contribute to design discussions and implement robust backend services—while staying open to the best technical approach rather than following a single prescribed pattern.

• Key Responsibilities:

Data modeling and persistence

• Design logical and physical data models, schema migrations, indexing strategies, and performance tuning for SQL workloads.
• Partner with stakeholders to translate requirements into maintainable database structures and data contracts.

API design and implementation

• Build clean, well-documented

RESTful APIs

(and/or GraphQL where appropriate) with consistent patterns, versioning, and error handling.

• Implement validation, pagination, filtering, and search-oriented endpoints as needed.

Serverless and cloud-native development

• Develop and operate

Azure Functions

(HTTP-triggered and event-based) for core backend workloads and integrations.

• Implement observability (logging, metrics, tracing), resiliency patterns, and cost-aware scaling.

Integration with Microsoft data platform

• Integrate backend services with

Microsoft SQL Server deployed on Microsoft Fabric

, ensuring reliable connectivity, security, and performance.

• Work with platform owners to align environments, deployment workflows, and governance.

Security: authentication and authorization

• Implement

authentication & authorization

using industry best practices (e.g., OAuth2/OIDC, JWT, RBAC/ABAC concepts), aligned with Microsoft identity patterns.

• Ensure secure secrets management, least-privilege access, and threat-aware API design.

API metering and usage-based controls

• Implement

API metering

, quota/rate-limiting patterns, usage aggregation, and reporting.

Quality, reliability, and delivery

• Write automated tests (unit/integration), establish CI/CD pipelines, and support releases across environments.
• Participate in code reviews, define backend standards, and maintain clear technical documentation.

• Primary language: Strong backend experience with

JavaScript/TypeScript

(preferred), including production API development.

• Experience with common frameworks/tooling (e.g., Node.js, Express/Fastify/NestJS) is beneficial.

• Secondary options: Strong experience with

Java

or

Python

backend development (especially for APIs and cloud services).

Proven ability to design and build

production-grade REST APIs

, including:

• Versioning strategies, input validation, error models, pagination/filtering patterns
• API documentation using

OpenAPI/Swagger

Strong fundamentals in

relational data modeling

and

• SQL:

• Schema design, indexes, constraints, transactions, query tuning

Hands-on experience building and operating

Azure Functions

(or equivalent serverless):

• Deployment, configuration, observability, scaling/cost awareness

Experience integrating with

Microsoft SQL Server

, ideally in a cloud-hosted setup; familiarity with

Microsoft Fabric

integration is a plus.

Strong understanding of

• authentication & authorization:

• OAuth2/OIDC, JWT, claims/roles, least privilege, secure secrets management

Experience implementing

API metering/usage tracking

concepts:

• Rate limiting, quotas, tenant-level usage aggregation, auditability

Practical experience with

CI/CD

, automated testing, and building services that are reliable in production (monitoring, alerting, incident-friendly design).

• Nice-to-Have Skills:

• Experience with

Azure API Management (APIM)

for gateway policies, authentication integration, throttling, and analytics.

• Familiarity with

Microsoft Entra ID

(Azure AD) for OAuth2/OIDC flows, app registrations, scopes, and role/claims-based access.

• Experience using

Azure Key Vault

for secrets/certificates management and secure configuration practices.

• Infrastructure-as-Code experience using

Bicep

and/or

Terraform

to provision and manage Azure resources in repeatable, audited deployments.

• Experience with Azure API Management (APIM) for gateway policies, authentication integration, throttling, and analytics.
• Familiarity with Microsoft Entra ID (Azure AD) for OAuth2/OIDC flows, app registrations, scopes, and role/claims-based access.
• Experience using Azure Key Vault for secrets/certificates management and secure configuration practices.
• Infrastructure-as-Code experience using Bicep and/or Terraform to provision and manage Azure resources in repeatable, audited deployments.