Software Engineer II | Backend

Mindbody; Brasil; On-site; BRL 180,000 - 280,000; Full time

Job summary

Mindbody’s External APIs team builds the developer-facing platform used by partners, integrators, and enterprise customers to connect Mindbody with payroll, marketing, booking, and other tools.

You will help ship, operate, and scale APIs with a focus on reliability, backward compatibility, and partner experience across a growing ecosystem.

Qualifications

• Expertise with languages like .NET, C#, Kotlin, Java, TypeScript, or JavaScript - backend focus (.NET/C#).
• Experience designing APIs and microservice architecture; public or partner-facing API experience (REST or webhooks) is a plus.
• Familiarity with API platform concerns such as versioning, rate limiting, API keys / OAuth 2.0, and backward-compatible changes.
• Familiarity with observability tools like New Relic or Kibana.
• Deep understanding of SQL and relational databases.
• An agile mindset and a strong grasp of software development lifecycle practices.
• Ability to navigate complexity, assess tradeoffs, and execute with confidence - including when a change could affect partner integrations.
• Excellent communicator who brings others along and helps ideas stick, including Partnerships, Support, and engineering peers.

Responsibilities

• Build and maintain performant backend systems and applications that drive real-world experiences - especially the public and partner APIs studios, aggregators, and strategic accounts depend on
• Partner with Product, Partnerships and API Support to bring features to life from ideation through deployment, always iterating with the end-user in mind - here, that user is often an external developer or enterprise integrator
• Contribute to API platform work such as authentication and authorization, versioning, rate limiting, and changes that protect the experience our partners depend on
• Help keep existing integrations stable while we ship new capabilities - including compatibility across surfaces that share core Mindbody systems
• Improve webhook delivery, sandbox and onboarding flows, and the reliability of the developer portal so partners can integrate with confidence
• Champion engineering best practices-automated testing, peer reviews, observability, and elegant design
• Contribute to architecture decisions that prioritize scalability and simplicity
• Participate in production support using observability, on-call, and incident response for partner-facing APIs
• Seek feedback, iterate fast, and balance innovation with reliability
• Approach development with empathy-understanding how your work supports both our partners and their communities
• Mentor others and help foster a collaborative, inclusive engineering culture

Skills

Backend development

C# / .NET

API design

REST / Webhooks

SQL

Observability

Agile

Communication

Tools

New Relic

Kibana

SQL Server

MongoDB

Redis

AWS

Job description

At Playlist, life's richest moments happen when people step away from screens to move, connect, explore, and play. We're building the definitive platform for intentional living, connecting people with inspiring experiences in fitness, wellness, and beyond. With popular brands like Mindbody and ClassPass, Playlist empowers businesses and individuals, making it effortless for aspirations to become actions. Join us in reshaping technology's role to foster meaningful, real-world connections.Mindbody equips wellness entrepreneurs with technology to support thriving businesses and create exemplary experiences. Innovation and curiosity drive our culture, connecting businesses and individuals through cutting-edge solutions. Join us if you're passionate about enhancing wellness through technology.

The Role You’ll Play

You’ll join Mindbody’s External APIs team, which owns the developer-facing platform that partners, integrators, and enterprise customers build on. That includes our Public API, Webhooks, Affiliate API, and the developer portal experience. You’ll help build, ship, and operate the APIs that thousands of wellness businesses use to connect Mindbody to payroll, marketing, booking, and other tools - with a high bar for reliability, backward compatibility, and partner experience.

• Build and maintain performant backend systems and applications that drive real-world experiences - especially the public and partner APIs studios, aggregators, and strategic accounts depend on
• Partner with Product, Partnerships and API Support to bring features to life from ideation through deployment, always iterating with the end-user in mind - here, that user is often an external developer or enterprise integrator
• Contribute to API platform work such as authentication and authorization, versioning, rate limiting, and changes that protect the experience our partners depend on
• Help keep existing integrations stable while we ship new capabilities - including compatibility across surfaces that share core Mindbody systems
• Improve webhook delivery, sandbox and onboarding flows, and the reliability of the developer portal so partners can integrate with confidence
• Champion engineering best practices-automated testing, peer reviews, observability, and elegant design
• Contribute to architecture decisions that prioritize scalability and simplicity
• Participate in production support using observability, on-call, and incident response for partner-facing APIs
• Seek feedback, iterate fast, and balance innovation with reliability
• Approach development with empathy-understanding how your work supports both our partners and their communities
• Mentor others and help foster a collaborative, inclusive engineering culture

Experience You Bring

You care about writing great code and solving the right problems. You’re energized by big-picture thinking and grounded in delivering value with clarity and care.

• Expertise with languages like .NET, C#, Kotlin, Java, TypeScript, or JavaScript - with particular strength in backend services (our public API surface is .NET / C#)
• Experience designing APIs and working with microservice architecture; public or partner-facing API experience (REST or webhooks) is a plus
• Familiarity with API platform concerns such as versioning, rate limiting, API keys / OAuth 2.0, and backward-compatible changes is a plus
• Familiarity with observability tools like New Relic or Kibana
• Deep understanding of SQL and relational databases
• An agile mindset and a strong grasp of software development lifecycle practices
• Ability to navigate complexity, assess tradeoffs, and execute with confidence - including when a change could affect partner integrations
• Excellent communicator who brings others along and helps ideas stick, including Partnerships, Support, and engineering peers

Technologies you could be working with

Languages and frameworks: C# and .NET / ASP.NET for our backend APIs, with some frontend work on the developer portal

APIs and integration: REST, SOAP, Webhooks, OAuth 2.0, API keys

Data: SQL Server and relational data modeling as the primary store; some NoSQL (MongoDB) for partner-facing services; Redis for caching

Architecture and cloud: Microservices on AWS

Monitoring: New Relic, Kibana

We do not expect you to have used every technology on it. People join from other stacks and ramp quickly when they want to learn and adapt.

The Company is an Equal Opportunity Employer. We highly value diversity at our company and encourage people of all different backgrounds, experiences, abilities and perspectives to apply. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other protected characteristics.

Note: This description outlines key responsibilities but isn’t intended to cover every task or duty. Additional responsibilities may be assigned as needed to support the team and business goals.