Senior Fullstack Engineer – Payments AI Platform (Remote)

thinkbridge; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Remote-first work

Company laptop

Team meetups

Learning time during work hours

Paid certifications

Job summary

thinkbridge is seeking a full-stack engineer to build and ship features for a prepaid card and payments platform. You will work across backend services, UI, databases, and cloud infrastructure, guiding AI coding agents, reviewing output, and validating changes with tests and user-flow checks.

The role emphasizes security and reliability in financial transactions, with hands-on work in C#/.NET, TypeScript, React, and SQL, plus collaboration across APIs and data stores.

Qualifications

• 4-6 years of full-stack engineering experience.
• Hands-on experience with C# and .NET 8-10, Azure Functions, ASP.NET APIs, EF Core, and Dapper.
• Experience with React, React Native, and Angular using TypeScript, plus Node and Jest.
• Working knowledge of MySQL, SQL Server, Cosmos DB, Redis, queues, and SQL debugging.
• Experience using an AI coding assistant to ship real software and the ability to assess and debug code it generates.
• Careful judgment around financial operations, data privacy, and behavior when requests fail or time out.

Responsibilities

• Plan and deliver changes with an AI coding tool, reviewing generated code and validating fixes with targeted tests and user-flow checks.
• Develop and debug services and interfaces across C#/.NET, TypeScript, and SQL.
• Investigate issues that cross API boundaries, where server behavior and client assumptions may differ.
• Check changes for risks such as duplicate debits, failed refunds, or unauthorized access to another customer's data.
• Work across payment integrations, data stores, cloud services, and web or mobile applications as needed.

Skills

C#/.NET

Azure Functions

ASP.NET APIs

EF Core

Dapper

React

React Native

Angular

TypeScript

Node

Jest

MySQL

SQL Server

Cosmos DB

Redis

Queues

SQL debugging

AI coding assistant

Data privacy

Tools

C#/.NET

React

TypeScript

SQL

Azure Functions

ASP.NET

EF Core

Dapper

React Native

Angular

Node

Jest

Job description

thinkbridge is seeking a full-stack engineer to build and ship features for a prepaid card and payments platform. You will work across backend services, UI, databases, and cloud infrastructure, guiding AI coding agents, reviewing output, and validating changes with tests and user-flow checks.

The role emphasizes security and reliability in financial transactions, with hands-on work in C#/.NET, TypeScript, React, and SQL, plus collaboration across APIs and data stores.