Senior Full-Stack Engineer: Build FinTech Journeys & APIs

GSD Search, LLC; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

GSD Search is partnering with a financial services client to hire a Senior Full Stack Software Engineer to build modern digital experiences across customer enrollment and supporting backend services.

You’ll help shape the customer journey from applications through account creation, signing, and downstream processing, contributing across the stack in a fast-moving environment where you own delivery and improve software practices.

Qualifications

• 5+ years building production systems across frontend and backend.
• Hands-on React, Next.js and TypeScript experience.
• Java backend with Spring as foundation for Kotlin.
• APIs, data models, and SQL databases design.
• Distributed systems concepts and asynchronous processing.
• Experience with event-streaming systems such as Kafka.
• Cloud platforms (AWS or GCP) and containerization.
• Observability tools such as Grafana/OpenTelemetry.
• Experience using AI tools in development workflows.
• Clear communication and collaboration across teams.

Responsibilities

• Build production features across frontend applications and backend services with a focus on scalability and reliability.
• Develop customer-facing applications using React, Next.js, and TypeScript; contribute Node.js work.
• Design and implement backend services, APIs, and business logic in a Kotlin/JVM environment.
• Design relational data models and work with MariaDB and PostgreSQL.
• Integrate third-party services for identity verification and workflows.
• Contribute to asynchronous processing and event-driven systems.

Skills

React

Next.js

TypeScript

Kotlin

Java/Spring

APIs

Distributed systems

AWS/GCP

Observability

AI tooling in development

Team collaboration

Tools

Kafka

MariaDB

PostgreSQL

OpenTelemetry

Grafana

Claude

Docker

Kubernetes

Job description

GSD Search is partnering with a financial services client to hire a Senior Full Stack Software Engineer to build modern digital experiences across customer enrollment and supporting backend services.

You’ll help shape the customer journey from applications through account creation, signing, and downstream processing, contributing across the stack in a fast-moving environment where you own delivery and improve software practices.