Senior Full Stack Engineer

IntraEdge Technology; United States; Remote; USD 130,000 - 170,000; Full time

Job summary

IntraEdge Technology is seeking a seasoned Software Engineer to design and deliver full-stack fintech platforms. You will own front-end via Next.js, back-end with C#/.NET, and data layers in PostgreSQL, deployed on AWS ECS.

Your work will impact loan origination, decisioning, and servicing while meeting regulatory and reliability requirements. You will collaborate with Product and Design, drive observability, security, and CI/CD practices, and mentor junior engineers through design reviews and

Qualifications

• 5+ years of professional software engineering experience.
• Production experience building and operating modern web applications across front and back end.
• Expert-level proficiency in C# / .NET and a modern React-based framework (Next.js strongly preferred).
• Strong working knowledge of PostgreSQL (or a comparable relational database), RESTful API design, and SQL Server / T-SQL.
• Hands‑on experience with AWS, including containerized workloads (ECS, EKS, Fargate or similar) and Docker.
• Bachelor’s degree in computer science, Engineering, or related technical field, or equivalent experience.

Responsibilities

• Architect, build, and operate the full-stack services and user experiences powering loan origination, decisioning, and servicing our platform.
• Ship features end-to-end across our stack: Next.js on the front end, C# / .NET on the back end, PostgreSQL for data, and AWS ECS for infrastructure.
• Translate complex financial and operational workflows into clean, performant, well-tested code that stands up to regulatory scrutiny and production load.
• Lead integrations with credit bureaus, dealer systems, fraud and verification providers, and other third-party partners.
• Extend and customize our DEFI Solutions loan originations platform—configuring workflows, scorecards, rules, and decision flows, via REST APIs and MSSQL.

Skills

C# / .NET

Next.js

React

PostgreSQL

REST APIs

SQL Server / T-SQL

AWS

Docker

CI/CD

Bachelor's degree in CS/Engineering

Education

Bachelor’s degree in computer science, Engineering, or related technical field

Tools

AWS ECS

EKS

Fargate

Job description

Key ResponsibilitiesDesign & Development

• Architect, build, and operate the full-stack services and user experiences that power loan origination, decisioning, and servicing our new Flagship Platform.
• Ship features end-to-end across our stack: Next.js on the front end, C# / .NET on the back end, PostgreSQL for data, and AWS ECS for infrastructure.
• Translate complex financial and operational workflows into clean, performant, well-tested code that holds up under regulatory scrutiny and production load.

API & Platform Integration

• Lead integrations with credit bureaus (Experian, Equifax, TransUnion), dealer systems (DealerTrack, RouteOne), fraud and verification providers, and other third-party partners including contract design, retry/idempotency strategy, and operational runbooks.
• Extend and customize our existing DEFI Solutions loan originations platform – configuring workflows, scorecards, rules, and decision flows, and developing services that integrate with DEFI via REST APIs and operational data store (MSSQL).

Feature Ownership

• Collaborate directly with Product, Design, and business stakeholders on features from problem framing through production rollout and post-launch iteration.
• Drive observability, performance, reliability, and security across the services you own.

Code Quality & Engineering Practices

• Set the patterns for testing, observability, security, and CI/CD that the rest of the team adopts.
• Leverage AI-assisted development practices and tools (Copilot, Cursor, Claude Code, and similar) to accelerate delivery without sacrificing quality.
• Run design reviews, give technical guidance, and help onboard the engineers who join after you.

Minimum Qualifications

• Experience: 5+ years of professional software engineering experience.
• Full Stack Depth: Production experience building and operating modern web applications across both front and back end. Expert-level proficiency in C# / .NET and a modern React-based framework (Next.js strongly preferred).
• Data & APIs: Strong working knowledge of PostgreSQL (or a comparable relational database), RESTful API design, and SQL Server / T-SQL.
• Cloud & Infrastructure: Hands‑on experience with AWS, including containerized workloads (ECS, EKS, Fargate or similar) and Docker.
• Education: Bachelor’s degree in computer science, Engineering, or related technical field, or equivalent experience.

Preferred Qualifications

• Direct experience working with or building on DEFI Solutions, or equivalent commercial Loan Origination Systems.
• Auto finance, lending, or other regulated-industry domain experience.
• Experience with event-driven architecture and AWS messaging services (SNS, SQS, EventBridge, Kafka, or similar).
• Experience integrating ML-driven decisioning, scoring, or underwriting models into production systems.