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unybrandsUN

Senior Fullstack Software Engineer

unybrands is an e-commerce aggregator that acquires, integrates, and scales successful Amazon FBA and DTC micro-brands using a technology-driven platform.

unybrands

Employee count: 51-200

Germany only

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unybrands was established in 2020 by a group of partners united by a shared vision: to build the leading next-generation e-commerce platform for micro-brands. Headquartered in Miami, the company has a global presence with teams in Berlin, London, New York, and China.

unybrands acquires e-commerce businesses that sell both on and off Amazon. Once acquired, these brands are integrated into unybrands' platform, where operations are optimized, business performance is enhanced, and expansion into new product lines and markets is driven. Currently we have acquired 30 brands including Pet Care, Personal Care, Home Care, Supplements, Baby & Juvenile, Garden & Outdoor, Sports & Fitness, and Home, Lifestyle Culinary & Arts. Through expert management and robust infrastructure, unybrands empowers e-commerce brands to scale and thrive.

About the Role

Build a greenfield Rust-based operational platform from the ground up. You'll design and deliver end-to-end features powering multi-million-dollar e-commerce operations across Amazon, Shopify, and TikTok.

Work across the stack — from React UIs to async Rust services — solving challenging distributed systems problems like rate limiting, durable async workflows, and multi-channel data synchronization.

Why You’ll Love This Role

  • Greenfield Rust platform: Help shape architecture and patterns from day one

  • End-to-end ownership: From UI to async backend to production deployment

  • Challenging problems: Multi-channel synchronization, rate limiting, and distributed reliability

  • High impact: Your work directly supports millions in e-commerce revenue

  • Autonomous environment: Small team with minimal bureaucracy

What You’ll Do

  • Design and implement features end-to-end: React UI, backend APIs, async processing, and data persistence

  • Build and maintain integrations with Amazon SP-API, Shopify, TikTok, and other marketplaces

  • Architect resilient systems that handle eventual consistency, partial failures, and retry logic

  • Develop queue-based async flows with robust error handling and correlation tracking

  • Implement operational features: multi-channel pricing, inventory sync, and order processing

  • Create real-time dashboards and monitoring tools for visibility and observability

  • Participate in code reviews, mentor team members, and improve system reliability over time

Technical Stack

Backend:

  • Rust with Axum (async framework on Tokio)

  • PostgreSQL (GCP Cloud SQL with HA)

  • SQLx for type-safe queries and migrations

  • Redis

Frontend:

  • React with TypeScript

  • Vite, Tailwind CSS, Shadcn

Architecture:

  • Modular monolith with async-first design

  • Event-driven processing (SQS)

  • Durable state workflows

Infrastructure:

  • GCP (Cloud SQL, GKE, Cloud Storage)

  • AWS (SQS for notifications)

  • Prometheus + Grafana for monitoring

Requirements

  • 7+ years building production web applications

  • Strong experience in statically-typed languages (Rust, TypeScript, Go, C#, or Java)

  • Solid background with React or similar modern frontend frameworks

  • Deep understanding of async programming, concurrency, and distributed system concepts

  • Strong SQL and schema design skills

  • Experience building and maintaining RESTful APIs

  • Excellent debugging, communication, and problem-solving skills

Nice to Have

  • Experience with e-commerce APIs (Amazon SP-API, Shopify, etc.)

  • Background in high-reliability or operational systems

  • Familiarity with event-driven design, idempotency, and backpressure handling

  • Experience with GCP, Kubernetes, or container orchestration

  • Knowledge of durable state management and crash recovery techniques

unybrands is an equal opportunity employer and considers all applicants for employment without any regard to race, skin color, religion, gender identity, sexual orientation, and age. Nor are applicants discriminated against based on disability or protected classes. 

About the job

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Posted on

Job type

Full Time

Experience level

Senior

Location requirements

Hiring timezones

Germany +/- 0 hours

About unybrands

Learn more about unybrands and their company culture.

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At the heart of unybrands is a culture driven by a singular mission: to shape the next generation of e-commerce by empowering micro-brands to reach new heights. Founded in 2020, unybrands operates as a next-generation platform that acquires, builds, and scales successful Fulfillment by Amazon (FBA) and direct-to-consumer (DTC) businesses. The company prides itself on being 'fair, fast, and reliable,' offering a transparent and founder-friendly acquisition process that rewards entrepreneurs for the value they have created while ensuring their brands continue to thrive under new stewardship.

The unybrands team is a diverse group of industry experts, united by a passion for the future of retail and a commitment to operational excellence. Leveraging a proprietary technology platform and deep expertise in supply chain, marketing, and marketplace optimization, unybrands integrates acquired businesses into a robust infrastructure designed for global scale. This technology-driven approach allows the company to optimize performance, expand into new markets, and launch new product lines efficiently. With a global presence spanning Miami, Berlin, London, and Seattle, unybrands fosters a collaborative and innovative environment where data meets creativity to build lasting brand legacies.

Employee benefits

Learn about the employee benefits and perks provided at unybrands.

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Generous vacation

25 days of paid time off for all employees.

Healthcare benefits

Competitive health care and dental options with up to 90% of costs covered.

Flexible working hours

Hybrid working model offering autonomy and flexibility to work around your schedule.

View unybrands's employee benefits
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