Senior Software Engineer - Full Stack

7Seventy; Northern (KY); Hybrid; USD 170,000 - 300,000; Full time

Benefits offered by this job

Medical coverage

Dental and vision

401(k) plan

HSA

FSA options

Lender partner loan program

Remote-first work environment

Flexible paid time off

Job summary

7Seventy is hiring a Senior Software Engineer - Full Stack to build AI-native software that automates mortgage workflows. You will own initiatives from architecture to production, impacting both frontend and backend systems.

Responsibilities include designing multi-step AI agents, integrating third-party APIs, implementing scalable data models, and ensuring reliability and security in a high-throughput AWS-based platform. You will mentor engineers and collaborate across teams.

Qualifications

• Experience architecting and delivering complex full-stack web application features from design through deployment.
• Strong TypeScript experience across frontend and backend systems.
• Experience building modern frontend applications with React.
• Experience developing backend services with Node.js, Express, GraphQL, and Apollo.
• Experience designing and integrating third-party APIs.
• Experience building scalable relational database schemas and optimizing complex data access patterns.
• Experience with PostgreSQL or comparable relational database technologies.
• Experience building and scaling distributed systems in cloud environments.
• Experience with AWS infrastructure and containerized applications.
• Experience with infrastructure-as-code tools such as Terraform or CloudFormation.
• Strong understanding of system reliability, observability, security, and maintainability.
• Ability to build readable, maintainable software architecture for enterprise use cases.
• Product-oriented mindset with the ability to consider user experience and business outcomes.
• Interest in mentoring less experienced engineers.

Responsibilities

• Architect, build, and launch complex, multi-step AI agents that automate operational workflows.
• Develop reliable AI-driven systems using evaluation frameworks, experiment design, dataset curation, and other modern AI product development practices.
• Design and develop full-stack web application features from initial product design through deployment.
• Build responsive frontend experiences using React and TypeScript.
• Develop scalable backend services using Node.js, Express, TypeScript, GraphQL, and Apollo.
• Share strongly typed TypeScript code across frontend, backend, and other packages within a monorepo.
• Create readable, maintainable, and effective architecture patterns that support enterprise customers.
• Integrate with third-party lending service APIs for document generation, disclosures, automated underwriting, fraud prevention, and related workflows.
• Design and scale complex PostgreSQL schemas containing large volumes of detailed loan data.
• Develop performant approaches for storing, retrieving, and updating complex relational data.
• Use generated TypeScript types from PostgreSQL and GraphQL schemas to maintain end-to-end type safety.
• Architect, build, and launch cloud-based job processing infrastructure on AWS.
• Improve backend observability, reliability, scalability, and operational efficiency.
• Build and operate distributed systems using AWS services including ECS, RDS, ElastiCache, Kafka, and Elasticsearch.
• Manage infrastructure as code using Terraform.
• Support automated deployment of temporary staging environments for pull requests.
• Apply an SRE-oriented mindset to create infrastructure that is reliable, observable, and requires minimal maintenance.
• Use production-like test data and automated end-to-end, integration, and performance testing utilities.
• Maintain a strong focus on application security and the protection of sensitive personal data.
• Balance engineering speed with reliability, maintainability, and high system availability.
• Contribute product ideas and consider the broader user and business impact of technical decisions.
• Lead mission-critical engineering projects and contribute to technical direction.
• Collaborate across product and engineering functions to deliver scalable, user-focused solutions.
• Mentor less experienced engineers in technical and professional skills.
• Communicate openly about technical decisions, challenges, outcomes, and lessons learned.

Skills

TypeScript

React

Node.js

GraphQL

AWS

Observability

Security

Tools

Terraform

Docker

PostgreSQL

Kafka

Elasticsearch

Job description

Salary Range: $170,000-$300,000 per year

Compensation Note: Final compensation depends on the candidate’s location and the level at which they are hired.

About the Role

This opportunity is for a Senior Software Engineer - Full Stack to build and scale AI-native software that automates complex mortgage workflows. The role combines full-stack product development, distributed systems, infrastructure, data architecture, third-party integrations, and mission-critical AI agents.

You will own complex initiatives from architecture through production deployment, contribute across frontend and backend systems, and help improve the reliability, observability, security, and scalability of a high-throughput cloud platform.

What You’ll Do

AI Product Development

• Architect, build, and launch complex, multi-step AI agents that automate operational workflows.
• Develop reliable AI-driven systems using evaluation frameworks, experiment design, dataset curation, and other modern AI product development practices.
• Design and develop full-stack web application features from initial product design through deployment.
• Build responsive frontend experiences using React and TypeScript.
• Develop scalable backend services using Node.js, Express, TypeScript, GraphQL, and Apollo.
• Share strongly typed TypeScript code across frontend, backend, and other packages within a monorepo.
• Create readable, maintainable, and effective architecture patterns that support enterprise customers.

Integrations and Data Systems

• Integrate with third-party lending service APIs for document generation, disclosures, automated underwriting, fraud prevention, and related workflows.
• Design and scale complex PostgreSQL schemas containing large volumes of detailed loan data.
• Develop performant approaches for storing, retrieving, and updating complex relational data.
• Use generated TypeScript types from PostgreSQL and GraphQL schemas to maintain end-to-end type safety.

Cloud Infrastructure and Reliability

• Architect, build, and launch cloud-based job processing infrastructure on AWS.
• Improve backend observability, reliability, scalability, and operational efficiency.
• Build and operate distributed systems using AWS services including ECS, RDS, ElastiCache, Kafka, and Elasticsearch.
• Manage infrastructure as code using Terraform.
• Support automated deployment of temporary staging environments for pull requests.
• Apply an SRE-oriented mindset to create infrastructure that is reliable, observable, and requires minimal maintenance.

Testing, Security, and Quality

• Use production-like test data and automated end-to-end, integration, and performance testing utilities.
• Maintain a strong focus on application security and the protection of sensitive personal data.
• Balance engineering speed with reliability, maintainability, and high system availability.
• Contribute product ideas and consider the broader user and business impact of technical decisions.

Leadership and Collaboration

• Lead mission-critical engineering projects and contribute to technical direction.
• Collaborate across product and engineering functions to deliver scalable, user-focused solutions.
• Mentor less experienced engineers in technical and professional skills.
• Communicate openly about technical decisions, challenges, outcomes, and lessons learned.
• Languages: TypeScript
• Frontend: React
• APIs: GraphQL, Apollo, third-party service integrations
• Infrastructure: AWS, Docker, Terraform
• AWS Services: ECS, RDS, ElastiCache, Kafka, Elasticsearch, and related services
• Testing: End-to-end, integration, and performance testing

Qualifications

• Experience architecting and delivering complex full-stack web application features from design through deployment.
• Strong TypeScript experience across frontend and backend systems.
• Experience building modern frontend applications with React.
• Experience developing backend services with Node.js, Express, GraphQL, and Apollo.
• Experience designing and integrating third-party APIs.
• Experience building scalable relational database schemas and optimizing complex data access patterns.
• Experience with PostgreSQL or comparable relational database technologies.
• Experience building and scaling distributed systems in cloud environments.
• Experience with AWS infrastructure and containerized applications.
• Experience with infrastructure-as-code tools such as Terraform or CloudFormation.
• Strong understanding of system reliability, observability, security, and maintainability.
• Ability to build readable, maintainable software architecture for enterprise use cases.
• Product-oriented mindset with the ability to consider user experience and business outcomes.
• Interest in mentoring less experienced engineers.

Preferred Experience

• Familiarity with modern AI product development lifecycles, including evaluations, experiment design, and dataset curation.
• Experience building reliable, multi-step AI agents or other LLM-powered systems.
• Experience scaling high-throughput distributed systems.
• Strong security awareness when working with sensitive personal or financial data.
• SRE-oriented experience building highly observable and low-maintenance infrastructure.
• Medical coverage with 100% of employee and family premiums covered
• Dental and vision coverage
• 401(k) plan
• HSA and FSA options
• Access to a lender partner employee loan program
• Remote-first work environment
• Flexible paid time off