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PlasmaPlasma

Mid-Level to Senior Software Engineer

Build and own full-stack product surfaces for a global money platform, delivering reliable experiences from APIs through React and React Native interfaces. The role requires production ownership, strong product judgment, and experience scaling client-facing systems.

About the job

Responsibilities

  • Build and own product and client-side surfaces end to end using React and React Native, from APIs to polished user interfaces.
  • Design and implement state management, data schemas, and robust handling of real financial data.
  • Partner closely with product and design from concept through implementation.
  • Own reliability through graceful failure handling, retries, and edge-case management.
  • Raise engineering quality through architecture, testing strategy, performance budgets, and code review.
  • Mentor engineers and drive technical clarity on the product side.
  • Proactively identify and solve problems with high agency.

Requirements

  • Mid-level to senior hands-on engineer with a track record of shipping and owning production full-stack systems end to end.
  • Strong product sense and attention to performance, responsiveness, usability, and trust.
  • Experience taking product surfaces from zero to one and scaling them while maintaining clarity and performance.
  • Strong judgment regarding speed versus polish, abstraction versus control, and simplicity versus flexibility.
  • Clear communication and ability to lead technical and product decisions.
  • Experience building product-facing or client-side systems at scale.
  • Data-informed decision-making and evaluation of solution effectiveness.

Nice to Have

  • React Native or native mobile development experience.
  • Interaction and motion design experience, including close partnership with product designers.
  • Fintech, banking, or crypto-native experience.
  • Experience as a founder or early employee at a fast-paced startup.

Compensation and Benefits

  • Above-market salary for the role level, with token compensation.
  • Visa sponsorship and relocation support.
  • Premium health insurance for the employee and family.
  • Monthly wellness budget.
  • Office gym access and daily food at the London headquarters.
  • Tools and technology to support effective work.

Skills

TypeScript, Node.js, React, React Native, State Management, Data Schemas, API Design, Testing, Performance Optimization, Mobile Development

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