Senior Backend Engineer

monzoreferrals; United States; Hybrid; USD 139,000 - 178,000; Full time

Benefits offered by this job

Relocation support

Visa sponsorship

Flexible hours

Annual learning budget

Job summary

monzoreferrals is seeking a Senior Backend Engineer to design, build, and operate backend services for our in-house banking platform. You will work with cross-functional teams across product, design, data, and engineering to ship well-scoped outcomes, focusing on distributed systems and resilient software.

You will engage in cloud, container, and data infrastructure within a regulated production environment, with opportunities to contribute to open source and to influence system design through

Qualifications

• Substantial backend experience building technology products.
• Product-minded with focus on customer outcomes and data-informed decisions.
• Comfort navigating ambiguity in cross-functional squads.
• Strong interest in distributed systems and resilient software design.

Responsibilities

• Design, build, and operate backend services powering customer banking products.
• Collaborate daily with product, design, data, and engineering colleagues to ship outcomes.
• Contribute to distributed systems, asynchronous messaging, and resilient service architecture.
• Work with cloud, container, and data infra layers supporting a regulated platform.
• Support and maintain specific product or platform areas end-to-end within a squad.
• Contribute to open source projects where opportunities arise.

Skills

Backend engineering

Distributed systems

Go

Java

Scala

Tools

Kafka

Kubernetes

Docker

AWS

GCP

Cassandra

Envoy

Job description

Role overview

A senior backend engineering position focused on building and supporting an in-house banking platform used by customers every day. The role sits inside a cross‑functional squad alongside product managers, designers, mobile and web engineers, user researchers, data analysts, and writers, contributing to one of several self‑governing business units covering areas such as core banking, business banking, payments, wealth, borrowing, growth, platform, financial crime, and security. Some areas apply machine learning and AI, offering exposure to data‑driven product work.

Responsibilities

• Design, build, and operate backend services that power customer‑facing banking products
• Collaborate daily with product, design, data, and engineering colleagues to ship well‑scoped outcomes
• Contribute to distributed systems, asynchronous messaging, and resilient service architecture
• Work with cloud, container, and data infrastructure layers supporting a regulated production platform
• Support and maintain specific product or platform areas end‑to‑end as part of a dedicated squad
• Contribute to open source software where opportunities arise

Requirements

• Substantial experience working on the backend of a technology product
• A product mindset with care for customer outcomes and willingness to make data‑informed decisions
• Comfort operating in teams that navigate ambiguity
• Genuine interest in distributed systems and writing resilient software
• Hands‑on experience with at least one strongly‑typed language such as Go, Java, C, or Scala
• Enthusiasm for the work and openness to learning new technologies

Nice to have

• Prior exposure to Go, Cassandra, Kafka, Kubernetes, Docker, Envoy Proxy, AWS, or GCP (full onboarding support provided)
• Background contributing to open source projects

Benefits and work setup

• Salary range of £105,000 - £135,000 plus performance‑linked incentive awards
• Relocation support to the UK and visa sponsorship available
• London hub with flexibility for distributed working anywhere in the UK
• Flexible working hours and autonomy to structure your own schedule
• Annual learning budget of £1,000 for books, training courses, and conferences
• Part‑time working arrangements considered where feasible
• Travel costs supported for occasional London visits when based elsewhere in the UK
• Three‑stage interview process: initial call, take‑home task or pair‑coding exercise, and final interview covering system design and behavioural questions