Full Stack Engineer (Elixir Backend Focus)

Accountabilities:

You will own backend services and full-stack features that support partner integrations and the platform's core transaction workflows. Your responsibilities will include:

• Design, build, and operate Elixir services using Phoenix, Ecto, and OTP, including APIs, workers, and background jobs.

• Develop and evolve partner-facing REST APIs, including API versioning, outbound webhooks, and reliable delivery mechanisms.

• Build and maintain money-adjacent systems where accuracy is essential, including double-entry ledgers, loyalty point balances, settlement, and reconciliation.

• Own frontend features from end to end using React and TypeScript, covering administrative interfaces, partner dashboards, and their supporting APIs.

• Use AI coding agents such as Claude Code regularly to accelerate development, while carefully reviewing generated code for correctness, security, and maintainability.

• Conduct meaningful code reviews and provide an additional layer of scrutiny for system design, transaction integrity, and overall platform reliability.

• Document technical decisions through clear pull request descriptions, architecture notes, and documentation updates delivered alongside code changes.

• Collaborate with product and infrastructure teams on AWS deployment, monitoring, security, and ongoing platform improvements.

Requirements:

You should bring substantial software engineering experience, deep production-level Elixir expertise, and the ability to take ownership of both backend systems and frontend features. The role requires strong technical judgment, an AI-first mindset, and a commitment to building reliable software. Key qualifications include:

• At least 6 years of professional software engineering experience, including 4 or more years focused on backend development.

• At least 3 years of production experience with Elixir, Phoenix, Ecto, and OTP, including shipping, operating, and maintaining production systems.

• Daily use of AI coding tools such as Claude Code, Cursor, or equivalent, with the ability to evaluate and validate their output.

• Strong PostgreSQL expertise, including practical SQL, transaction semantics, and performance optimization.

• Solid experience designing REST APIs and implementing background job processing with retries, using Oban or an equivalent solution.

• Demonstrated experience in loyalty platforms, travel technology, payments, or FinTech.

• At least 2 years of React and TypeScript experience, with the ability to independently deliver complete frontend features, including components, state management, forms, validation, and error handling.

• Working knowledge of AWS services such as ECS, RDS, and S3, along with Docker and CI/CD workflows using GitHub Actions.

• Professional fluency in English.

Additional experience that would be an advantage includes:

• Building features with LLM APIs or AI-agent workflows.

• Experience with Redux Toolkit, RTK Query, Phoenix LiveView, Node.js with Express, or GraphQL.

• Familiarity with multi-tenant B2B platforms, multi-region architectures, and observability tools such as AppSignal, Sentry, or Datadog.

• Exposure to SOC 2 requirements and related security or compliance practices.

Benefits:

• Fully remote work, offering flexibility to work from anywhere.

• Competitive monthly salary package.

• Equity participation and qiibee tokens (QBX), providing an opportunity to share in the company's success.

• A fast-paced, international startup environment.

• Opportunities to work with AI-powered development workflows and contribute to an evolving, AI-first organization.

• A collaborative environment that encourages ownership, continuous learning, professional growth, and meaningful technical challenges.