Senior Software Engineer – Growth

ONMO

. Work as a product engineer in Growth, shaping technical approaches with Product and Design and shipping changes that improve Journey 1 outcomes .

Posted 10/7/2026full-timeLondon • United KingdomSenior💰 £85,000 - £95,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining customer-facing web and app features using modern frameworks like React and Node.js, while ensuring high-quality code through testing and documentation practices. Proficient in utilizing AWS, Terraform, and CI/CD methodologies to enhance production systems and improve user journeys.

Highest-signal resume keywords

Node.jsTypeScriptReact NativeAWSInfrastructure as Code

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend EngineeringFrontend EngineeringFull-Stack EngineeringEvent-Driven ArchitectureServerless ArchitectureClean Code PracticesTestingMonitoringDocumentationCode Review

Soft Skills

CollaborationProblem-SolvingOwnershipCommunication

Tools & Technologies

TerraformCI/CDReactNext.jsExpo

Certifications & Qualifications

FCA Conduct Rules

Industry Keywords

Customer-Facing FeaturesOnboardingAcquisition FunnelAccount ManagementFraud Prevention

Tech Stack

Tools & technologies

AWSJavaScriptNext.jsNode.jsReactReact NativeTerraformTypeScript

About the role

Key responsibilities & impact

Work as a product engineer in Growth, shaping technical approaches with Product and Design and shipping changes that improve Journey 1 outcomes
Build and improve onboarding, acquisition funnel conversion, login, account management, card management, personal details and other customer-facing Growth features
Own features in production by monitoring health, responding to issues, maintaining runbooks and identifying degraded journeys
Take first-pass ownership of bugs and support queries in Journey 1, fixing owned issues and handing over diagnosed root causes when needed
Contribute across onboarding, biometrics, APR, CLM, legal service, alert service, app and website front end
Build extensions to services owned by other teams under their contributor rules
Use data and product context to connect engineering work to conversion, utilisation, reliability and fraud / ID-failure outcomes
Write clean, tested, maintainable code and documentation
Collaborate with engineers, Product, Design, QA and business owners, bringing technical options early

Requirements

What you’ll need

Proven experience as a product-minded backend, frontend or full-stack engineer building and running production systems
Strong Node.js / TypeScript experience, ideally with AWS and event-driven or serverless architectures
Experience building customer-facing web or app features, preferably with React Native / Expo / React / Next.js or similar modern frontend frameworks
Good understanding of Infrastructure as code with Terraform; CI/CD as a habit
A track record of using testing, monitoring, documentation and code review to raise quality around you
Ability to write clean, tested, maintainable code and leave systems more understandable than you found them
FCA Conduct Rules: act with integrity; act with due skill, care and diligence; be open and cooperative with regulators; pay due regard to customers and treat them fairly; observe proper standards of market conduct