# Staff+ Software Engineer

**Company:** [Plasma](https://hotfix.jobs/companies/plasma)
**Location:** London, United Kingdom
**Role:** Fullstack Engineering
**Salary:** £180k – £400k/yr
**Experience:** 7+ years
**Skills:** TypeScript, Node.js, React, React Native, Backend Services, Data Modeling, System Architecture, State Machines, Data Integrity, Observability, Incident Response, Blockchain, Stablecoins
**Posted:** 2026-08-25

> Staff-level, backend-leaning software engineer responsible for the architecture, reliability, and end-to-end ownership of critical financial systems. The role requires deep TypeScript and Node.js expertise, full-stack range, strong technical judgment, and experience operating production systems.

## Job Description

## Responsibilities
- Own the team’s hardest technical problems end to end.
- Set technical direction for core systems, including architecture, data models, and engineering standards.
- Design reliable systems for money movement and storage, emphasizing idempotency, consistency, and graceful failure recovery.
- Build and maintain backend services in TypeScript and Node.js while contributing across client, API, and frontend layers as needed.
- Define handling for partial failures, retries, timeouts, reversals, and reconciliation gaps.
- Improve frontend systems and integrations where necessary.
- Raise standards for code quality, testing, monitoring, incident response, and solving ambiguous problems.
- Mentor engineers and lead technical decisions without direct people management.

## Requirements
- Staff-level, hands-on experience owning production systems end to end.
- Deep expertise building backend services with TypeScript and Node.js, with full-stack capability.
- Strong understanding of reliability, correctness, state machines, data integrity, observability, and operational risk.
- Experience taking systems from zero to one and scaling them while maintaining clarity.
- Strong judgment across tradeoffs such as speed versus safety and simplicity versus flexibility.
- Clear communication, clean coding practices, high agency, and data-driven decision-making.

## Nice to Have
- Fintech, banking, or crypto-native experience.
- Familiarity with stablecoins, custody, settlement, and blockchain transaction lifecycles.
- Experience as a founder or early employee at a fast-paced startup.

## Compensation and Benefits
- Salary of $180,000–$400,000, plus token compensation.
- Visa sponsorship and relocation support for international hires.
- Premium health insurance for the employee and family.
- Monthly wellness budget.
- London headquarters with gym access and daily food.
- Tools and technology budget.
- Significant ownership and responsibility from day one.

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