Senior/Staff Backend Payments Engineer

Plasma

Job Overview

Location

London, England, United Kingdom

Salary

GBP 180,000 - 220,000 yearly

Employment Type

Full-time

Work Arrangement

On-site

Sector

Information Technology & Software

Experience Level

Senior (5-8 years)

Application Deadline

May 18, 2026

About the Company

Plasma is at the vanguard of revolutionizing global finance by building a seamless money movement experience. Their flagship product, Plasma One, is a stablecoin neobank designed for instant global transactions, daily yield earnings, and worldwide spending capabilities via a Visa card. Currently in private beta, it has garnered significant interest with over 100,000 individuals on its waitlist. At its core, the Plasma network is a custom-built blockchain engineered from the ground up to support stablecoin payments. The company is committed to developing the entire ecosystem, from the foundational infrastructure to the user-facing application. Plasma fosters a team culture centered on relentless dedication to craft, trust, clarity, and ambition. They encourage ownership, urgency, and cross-functional contribution, creating an environment where individuals can undertake challenging and meaningful work. The company is ideal for those who thrive on complex problems and aspire to make a lasting impact.

Job Description

Plasma is building the future of money with a focus on seamless global transactions and innovative financial products.

As a Senior/Staff Backend Payments Engineer, you will be instrumental in designing, building, and owning the critical backend systems that power our stablecoin neobank. This role demands a deep understanding of financial infrastructure, with a focus on ensuring the safety, predictability, and scalability of money movement.

You will architect robust payment flows, manage transaction lifecycles, and implement sophisticated solutions for reconciliation and failure handling. This is an opportunity to shape the technical direction of a rapidly growing fintech company and contribute to redefining how the world interacts with money.

To apply for this role, click the Apply button on this page and follow the instructions.

Required Skills

TypeScriptNode.jsBackend DevelopmentSystem DesignPayments InfrastructureReliabilityCorrectnessMaintainabilityIdempotencyConsistencyFailure RecoveryObservabilityFinancial InfrastructureLedgering

Key Responsibilities

Build and own critical backend systems in TypeScript that power payments, balances, settlement, and reconciliation.
Design reliable money movement flows with strong guarantees around idempotency, consistency, and failure recovery.
Lead technical architecture across the payments domain, including system boundaries, data models, and operational strategy.
Work closely with product, compliance, and infrastructure to ship financial primitives that hold up under real-world use and real-world scrutiny.
Define how we handle edge cases: partial failures, retries, timeouts, chargebacks, reversals, and reconciliation gaps.
Raise the bar on engineering quality: code standards, testing strategy, monitoring, and incident response.
Mentor engineers and drive technical clarity across the team, especially in complex or ambiguous areas.
Help make stablecoin payments feel boring in the best possible way: fast, predictable, and trustworthy.

Qualifications

A senior, hands-on backend engineer with a track record of shipping and owning production systems.
Deep experience building backend services in TypeScript (Node.js) and strong engineering instincts around reliability and correctness.
Comfortable taking systems from zero to one, and then scaling them without losing clarity.
Strong judgment around tradeoffs: speed vs safety, abstraction vs control, simplicity vs flexibility.
You think in systems: APIs, state machines, data integrity, observability, and operational risk.
You communicate clearly, write clean code, and can lead through technical decisions.
You have solid experience building payments, ledgering, or financial infrastructure.

Benefits & Perks

Above market salary plus token compensation.
Premium health insurance for you and your family fully covered by Plasma.
Monthly wellness budget, whether for the gym, therapy, sauna & massage.
A beautiful London HQ with gym access and daily food, for those who thrive in an office environment.
All the tools and tech you need to operate at your best.
Visa sponsorship and relocation support if you are joining the London office from abroad.
Ownership.

How to Apply

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The global finance industry is rapidly evolving with the rise of stablecoins, creating a significant demand for robust payment infrastructure. Plasma is at the forefront, building a stablecoin neobank that redefines money movement. This role is pivotal in shaping the end-to-end payments architecture, focusing on transaction lifecycle, reconciliation, and advanced failure handling. You will influence system design, set technical standards, and ensure the reliability and scalability of critical financial primitives. Your impact will directly contribute to the business's ROI by enabling secure, predictable, and high-volume transactions, solidifying Plasma's position in the fintech landscape.