Senior Full-Stack Engineer - AI-Driven Global Payroll

Vialto UK & Ireland; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Vialto UK & Ireland is hiring a Senior Full Stack Engineer to design, build, and operate secure, scalable products powering Compensation Collection, Shadow Payroll, and Equity for multinational employers.

You will deliver hands-on engineering across Next.js and React front ends and C# and .NET services running on Microsoft Azure, in a highly regulated, multi-jurisdictional environment where accuracy, auditability, and data privacy are non-negotiable.

Qualifications

• 5+ years professional software development experience building enterprise web applications.
• Experience with Next.js and React (TypeScript) for scalable frontend apps.
• Proficient in C# and .NET, with API design for high-integrity systems.
• Microsoft Azure design and delivery of PaaS solutions in regulated environments.
• Experience with AI-assisted development workflows and agentic tools.
• Familiarity with cross-border payroll, compensation or tax platforms.

Responsibilities

• Build and evolve modern web experiences for Compensation Collection, Shadow Payroll, and Equity products.
• Design backend services and APIs using C#, .NET, and WebAPI for data ingestion and payroll calculations.
• Deliver Azure-native implementations of payroll engines and data pipelines.
• Own production readiness including logging, monitoring, and incident response.
• Mentor engineers through code reviews and pairing.

Skills

Next.js

React

TypeScript

C#

ASP.NET

WebAPI

RESTful design

Azure

AI-assisted development

Claude Code

Codex

LangChain

Workday

SAP

ADP

Shareworks

Carta

Security/compliance

TDD/BDD

CI/CD

SQL Server

Entity Framework

Education

Bachelor's degree in computer science, engineering, or related field

Master's degree preferred

Tools

Workday

SAP

ADP

Shareworks

E*TRADE

Carta

Job description

Vialto UK & Ireland is hiring a Senior Full Stack Engineer to design, build, and operate secure, scalable products powering Compensation Collection, Shadow Payroll, and Equity for multinational employers.

You will deliver hands-on engineering across Next.js and React front ends and C# and .NET services running on Microsoft Azure, in a highly regulated, multi-jurisdictional environment where accuracy, auditability, and data privacy are non-negotiable.