Backend Software Engineer

About Firework

Join Firework – Where Innovation Meets Impact

Firework is redefining the future of commerce as an AI and video commerce company — combining cutting-edge technology, an exclusive network of enterprise brands and retailers, and a first-mover position to win the agentic commerce race.

We've built the world's most advanced and largest video commerce platform, trusted by global brands and leading retailers. But we're more than software — our compounding network effect grows stronger with every partner we add, bringing the energy of in-store experiences online and transforming how businesses engage, convert, and build lasting customer relationships at scale.

Having raised over $235M to date, led by investors such as SoftBank Vision Fund 2, and operating at global scale, we offer unparalleled opportunities to solve complex challenges and drive meaningful impact in the future of connected commerce.

If you're curious, ambitious, and energized by big ideas — Firework is the place to grow, lead, and shape what comes next. Together.

Summary

Our Engineering team is growing! We’re seeking a skilled Staff Backend Engineer to join our global team, bring technical expertise and leadership along with hands-on development of backend software development.

What you’ll be doing

• Partner closely with product managers, designers, and engineering teams to translate product vision into robust technical solutions

• Design and build scalable APIs using the Elixir Phoenix framework that power our core products and services

• Architect efficient data models and write optimized PostgresQL and Cassandra queries, creating high performance indexes to support large-scale data workloads

• Working with in-memory data stores, such as Redis, to improve scalability and responsiveness

• Lead complex debugging and incident resolution across the entire stack using logging and monitoring tools 

• Guide and mentor engineers through thoughtful code reviews, sharing expertise and helping elevate the team’s technical capabilities 

• Drive improvements to engineering standards, tooling, and processes

• Ensure coherence of all aspects of projects as an integrated system and uphold overall technical quality

• Contribute to technical strategy by identifying opportunities for new programs, products, or features by monitoring industry developments and trends

• Help define and evolve development practices, including technology choices, architectural patterns, workflows and coding standards to support a high-performing engineering organization