MacPaw

We’re looking for a Senior Back-end Engineer (Golang) to join our team and work on subscription and billing-related functionality within a product environment.

You’ll work with complex business logic, third-party integrations, and existing systems, collaborating closely with product and engineering teams. We’re looking for someone curious, proactive, and responsible who enjoys learning, taking ownership, and improving solutions.

MacPaw is building the next generation of its Setapp Marketplace—a platform where developers distribute Mac, iOS, and Web applications to a wide audience around the world. Billing is at the core of this platform, powering how customers pay, how vendors earn, and how the business scales globally.

Our back-end stack: Go, Temporal, PHP 8.0+ (Symfony Components, Doctrine ORM); PostgreSQL, Redis, RabbitMQ; PHPUnit; Cloud-Native: AWS, GCP, K8s, Docker.

Skills you’ll need to bring:

• 5+ years of hands-on experience with Golang
• System Design & Architecture
• Confident work with PostgreSQL/relational databases: schema design, complex SQL queries, migrations, and performance optimization (indexes, profiling)
• Experience with Docker in development and runtime environments; ability to work with Docker images/containers and Docker Compose locally
• Experience with RabbitMQ (or similar message queues): pub/sub and work queue patterns, producers/consumers, basic configuration concepts
• Basic understanding of Kubernetes concepts and common objects (Deployments, Services, ConfigMaps)
• CI/CD pipelines and a basic understanding of cloud or infrastructure tooling
• Basic testing practices (unit/integration) and awareness of secure coding principles (OWASP)
• At least an intermediate level of English & fluent Ukrainian

As a plus:

• Workflow orchestration tools such as Temporal or similar solutions
• Familiarity with Infrastructure as Code (Terraform)
• NoSQL databases and caching solutions (e.g. MongoDB, Redis)

What We Offer:

• We are a Ukrainian company, and we stand with Ukraine against the russian aggression
  We maintain workplaces for the mobilized Macpawians and provide financial support to colleagues or their families affected by the war. Here, you can also read about the MacPaw Foundation, which intends to help save the lives of Ukrainian defenders and provide relief to as many civilians as possible.
• We are committed to our veterans
  Our Veteran Career and Empowerment Program is designed to ensure our veterans and active military personnel receive the recognition, support, and opportunities they deserve.
• Hybrid work model
  Whether to work remotely or at the hub is entirely up to you. If you decide to mix it, our Kyiv office, which works as a coworking space, is open around the clock. The office is supplied with UPS and Starlink for an uninterrupted work process.
• Your health always comes first
  We guarantee medical insurance starting on your first working month. For those abroad, you can receive a yearly Medical insurance allowance as compensation for managing your medical expenses.
• Flexible working hours
  You can choose a schedule that is comfortable for you. No one here tracks your clock in/out because MacPaw is built on trust and cooperation.
• Space to grow both professionally and personally
  Education opportunities to grow both hard and soft skills, annual development reviews, and internal community.
• Teams we are proud of
  We build honest, transparent, and reliable relationships within teams. Every Macpawian can improve processes and implement their ideas. We encourage open and constructive feedback and provide training for Macpawians on giving and receiving feedback.
• Office designed for people (and pets)
  Our office has it all: a spacious workplace with enough room for sitting up, lying down, and running around; a gym for recreation; cozy kitchens; a sleeping/meditation room; and a terrace with a view where we throw summer parties. Also, we have two cats living in the office, and you are welcome to bring your pets to the office (we have separate floors for cats and dogs).
• Time-off policy that covers life’s needs
  Convenient personal time-off policy to help you take care of essential matters in your personal life, and parental leaves. On top of all that, sabbaticals are open after 5 years of being with MacPaw.
• Join social initiatives with MacPawCares
  MacPaw participates in numerous humanitarian aid and charity projects across many fields, and you are welcome to jump in to make the world a better place.
• We’re an equal-opportunity employer. Here is a safe place for applicants of all backgrounds
  We are hiring talented humans. Meaning with all our variety of backgrounds and identities, including service members and veterans, women, members of the LGBTQIA+ community, individuals with disabilities, and other often underrepresented groups. MacPaw does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.
  
  *Some benefits are under development, and new adjustments are possible.

Our Technological R&D Center is where innovation takes shape. It’s the heartbeat of our technical evolution, where we don’t just follow trends — we define how they work within the Apple ecosystem. 

As a Senior Research Engineer, you will work in a cross-functional squad with engineers and researchers, where you can blend deep engineering research with high-impact commercial delivery, without the friction of bureaucracy. Your research won't just sit on a shelf; it will power the next generation of MacPaw products.

In this role, you will:

• Research and implement technical solutions for on-device AI model execution on macOS
• Build functional prototypes and adapt them to the evolving requirements. You will bridge the gap between R&D hypotheses and stable, high-performance technology
• Develop internal tools and frameworks for the TR&D team to accelerate the testing of new AI approaches and facilitate the early adoption of innovative technologies across MacPaw
• Partner with AI researchers, designers, and product teams to clarify technical details, define edge cases, and propose architectural solutions in high-uncertainty environments
• Conduct deep-dive sessions for the engineering team on research findings, document successful implementation cases, and act as a technical expert in joint projects with academic institutions

Skills you’ll need to bring:

• Strong knowledge of the Apple ecosystem, with a deep focus on macOS internals (app sandboxing, XPC services, system daemons, etc.)
• Profound background with Swift/Objective-C and experience with architectural design for complex, high-performance systems
• Ability to find solutions for undocumented technical challenges (e.g. reverse engineering techniques or exploring low-level system behaviors)
• Experience in hypothesis validation, performance benchmarking (RAM/CPU/Battery), and documenting research findings into clear technical reports
• Practical experience in building functional application prototypes from scratch and bridging the gap between an idea and a stable POC
• Upper-intermediate English & fluent Ukrainian
   

As a plus:

• Basic understanding of ML concepts (embeddings, tokens, LLM architecture)
• Practical experience with Python
• Experience working with MLX or CoreML
• Background in product-focused companies

What We Offer:

• We are a Ukrainian company, and we stand with Ukraine against the russian aggression
  We maintain workplaces for the mobilized Macpawians and provide financial support to colleagues or their families affected by the war. Here, you can also read about the MacPaw Foundation, which intends to help save the lives of Ukrainian defenders and provide relief to as many civilians as possible.
• We are committed to our veterans
  Our Veteran Career and Empowerment Program is designed to ensure our veterans and active military personnel receive the recognition, support, and opportunities they deserve.
• Hybrid work model
  Whether to work remotely or at the hub is entirely up to you. If you decide to mix it, our Kyiv office, which works as a coworking space, is open around the clock. The office is supplied with UPS and Starlink for an uninterrupted work process.
• Your health always comes first
  We guarantee medical insurance starting on your first working month. For those abroad, you can receive a yearly Medical insurance allowance as compensation for managing your medical expenses.
• Flexible working hours
  You can choose a schedule that is comfortable for you. No one here tracks your clock in/out because MacPaw is built on trust and cooperation.
• Space to grow both professionally and personally
  Education opportunities to grow both hard and soft skills, annual development reviews, and internal community.
• Teams we are proud of
  We build honest, transparent, and reliable relationships within teams. Every Macpawian can improve processes and implement their ideas. We encourage open and constructive feedback and provide training for Macpawians on giving and receiving feedback.
• Office designed for people (and pets)
  Our office has it all: a spacious workplace with enough room for sitting up, lying down, and running around; a gym for recreation; cozy kitchens; a sleeping/meditation room; and a terrace with a view where we throw summer parties. Also, we have two cats living in the office, and you are welcome to bring your pets to the office (we have separate floors for cats and dogs).
• Time-off policy that covers life’s needs
  Convenient personal time-off policy to help you take care of essential matters in your personal life, and parental leaves. On top of all that, sabbaticals are open after 5 years of being with MacPaw.
• Join social initiatives with MacPawCares
  MacPaw participates in numerous humanitarian aid and charity projects across many fields, and you are welcome to jump in to make the world a better place.
• We’re an equal-opportunity employer. Here is a safe place for applicants of all backgrounds
  We are hiring talented humans. Meaning with all our variety of backgrounds and identities, including service members and veterans, women, members of the LGBTQIA+ community, individuals with disabilities, and other often underrepresented groups. MacPaw does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.
  
  *Some benefits are under development, and new adjustments are possible.