Senior Full Stack Developer

At Zelis, we Get Stuff Done. So, let’s get to it!

A Little About Us

Zelis is modernizing the healthcare financial experience across payers, providers, and healthcare consumers. We serve more than 750 payers, including the top five national health plans, regional health plans, TPAs and millions of healthcare providers and consumers across our platform of solutions. Zelis sees across the system to identify, optimize, and solve problems holistically with technology built by healthcare experts – driving real, measurable results for clients.

At Zelis, AI is woven into the fabric of how we work. Every associate is expected - and empowered - to partner with AI to challenge the status quo, accelerate innovation, and amplify their impact. This is a place for builders with a growth mindset who act with agility, embrace change, and use modern technology to shape smarter solutions, exceptional experiences, and the future of our industry for our clients, customers, and our culture.

A Little About You

You bring a unique blend of personality and professional expertise to your work, inspiring others with your passion and dedication. Your career is a testament to your diverse experiences, community involvement, and the valuable lessons you've learned along the way. You are more than just your resume; you are a reflection of your achievements, the knowledge you've gained, and the personal interests that shape who you are.

Position Overview

We are seeking an experienced Senior Full Stack Cloud Developer / Software Engineer to design, develop, integrate, and support modern enterprise applications across Microsoft, Azure, AWS, and Snowflake platforms. The ideal candidate will have strong hands-on experience with C#, .NET, Angular, TypeScript, SQL Server, REST APIs, JSON, cloud-native development, containerization, and Snowflake, along with experience using modern Agentic AI and AI-assisted development tools such as GitHub Copilot, ChatGPT, and Claude. This role will work across the full software development lifecycle, including solution design, application development, database development, API integration, cloud deployment, testing, troubleshooting, performance optimization, and production support. The developer will collaborate with architects, product owners, business analysts, data teams, infrastructure teams, and other developers to deliver secure, scalable, maintainable solutions.

Key Responsibilities

• Design, develop, enhance, and maintain enterprise applications using C# and .NET.

• Develop modern, responsive web applications using Angular, TypeScript and related front-end technologies (i.e., AppSmith).

• Design and implement RESTful APIs and application integration services.

• Develop solutions that exchange and process structured data using JSON and API-based integration patterns.

• Design, develop, and optimize database solutions using SQL Server 2022, including:

• T-SQL queries

• Stored procedures

• Views

• Functions

• Tables and indexes

• Data transformations

• Query and database performance optimization

• Develop, debug, test, and deploy applications using Visual Studio 2022 and modern source-control practices.

• Design and implement cloud-based applications and services within Microsoft Azure.

• Develop and support solutions using AWS services, including:

• Amazon ECS

• Amazon EC2

• AWS Lambda

• Amazon S3

• Create and maintain container images, configuration, deployment processes, and environment-specific application settings.

• Develop and support data integrations between enterprise applications, SQL Server, cloud platforms, APIs, and Snowflake.

• Write and optimize Snowflake SQL for data processing, transformation, integration, and analytical workloads.

• Support data movement and integration between transactional systems, APIs, cloud storage, and Snowflake.

• Participate in application architecture and technical design discussions.

• Develop reusable components, libraries, APIs, and services following established software engineering standards.

• Perform application debugging, root-cause analysis, performance tuning, and production troubleshooting.

• Implement appropriate application logging, monitoring, exception handling, and operational support capabilities.

• Participate in code reviews and promote software development best practices related to maintainability, performance, security, and scalability.

• Collaborate with DevOps and infrastructure teams to support automated build, deployment, and release processes.

• Support applications across development, testing, staging, and production environments.

• Create and maintain technical documentation for application architecture, APIs, database objects, integrations, and deployment processes.

• Agentic AI and AI-Assisted Development

• Leverage modern Agentic AI and AI-assisted development tools, including:

• GitHub Copilot

• ChatGPT

• Claude

• Use AI tools to accelerate software development activities such as:

• Code generation

• Code refactoring

• Unit test generation

• SQL development

• API development

• Technical documentation

• Debugging and troubleshooting

• Code review assistance

• Solution prototyping

• Evaluate AI-generated code and recommendations for correctness, security, performance, and maintainability before implementation.

• Apply responsible AI development practices and comply with organizational security, privacy, intellectual-property, and data-governance requirements.

• Identify opportunities to incorporate AI-assisted or agentic workflows into software engineering and business processes.

• Required Technical Skills

• Application Development

• Strong experience with C#

• Strong experience with .NET / .NET Core

• Experience developing enterprise web applications

• Experience with Angular, TypeScript and related front-end technologies (i.e., AppSmith)

• Object-oriented programming and software design principles

• Experience with asynchronous programming and service-oriented application architectures

• API and Integration Development

• Strong experience designing and consuming REST APIs

• Experience developing API-based integrations between applications and services

• Strong understanding of:

• HTTP/HTTPS

• REST

• JSON

• Authentication and authorization

• Error handling

• API versioning

• Experience integrating cloud, database, and third-party services through APIs

• Database Development

• Strong experience with Microsoft SQL Server 2022

• Advanced T-SQL development skills

• Experience developing:

• Stored procedures

• Views

• Functions

• Complex queries

• Data-loading and transformation processes

• Experience with database performance tuning and query optimization

• Understanding of relational database design and data modeling

• Microsoft Development Tools

• Strong experience with Visual Studio 2022

• Experience with application debugging and profiling

• Experience with Git-based source control and collaborative development workflows

• Azure Cloud Development

• Experience designing or developing applications within Microsoft Azure

• Understanding of cloud-native application architecture

• Experience integrating applications with Azure-hosted services

• Familiarity with cloud security, configuration management, logging, monitoring, and deployment patterns

• AWS

Hands-on experience with one or more of the following AWS services:

• Amazon ECS – container orchestration and application hosting

• Amazon EC2 – cloud-based compute infrastructure

• AWS Lambda – serverless application and event processing

• Amazon S3 – cloud object storage and application/data integration

• Snowflake

• Experience developing and supporting solutions using Snowflake

• Strong Snowflake SQL skills

• Experience with data ingestion, transformation, and querying

• Experience integrating Snowflake with APIs, SQL Server, cloud storage, or application platforms

• Understanding of Snowflake databases, schemas, tables, views, warehouses, and role-based access concepts

• AI-Assisted Development

Hands-on experience with one or more AI development tools such as:

• GitHub Copilot
• ChatGPT
• Claude
• Ability to effectively use AI tools while independently validating generated code, architecture recommendations, SQL, and technical solutions.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related technical discipline, or equivalent professional experience.

• 5+ years of professional software development experience.

• 3+ years of hands-on developing experience including C#, .NET, Angular, TypeScript, SQL server and SSIS.

• Experience designing enterprise APIs and integration solutions.

• Experience working in both Azure and AWS environments.

• Experience with cloud-native and distributed application architectures.

• Experience with Snowflake or another enterprise cloud data platform.

• Experience working with CI/CD pipelines and automated deployment processes.

• Experience working in Agile/Scrum software development environments.

• Experience supporting business-critical production applications.

• Experience applying secure development practices to cloud and web applications.

• Experience using AI-assisted development tools in a professional software engineering environment.

• Desired Knowledge and Competencies

• Strong analytical and problem-solving skills.

• Ability to troubleshoot complex application, database, integration, and cloud infrastructure issues.

• Ability to translate business requirements into scalable technical solutions.

• Strong understanding of software engineering principles and design patterns.

• Understanding of application security and secure API development.

• Ability to work across front-end, back-end, database, integration, and cloud technologies.

• Strong written and verbal communication skills.

• Ability to collaborate effectively with technical and non-technical stakeholders.

• Ability to independently manage development assignments while contributing effectively within a development team.

• Strong commitment to code quality, maintainability, documentation, and continuous improvement.

• Experience with Docker and container orchestration.

• Please note at this time we are unable to proceed with candidates who require visa sponsorship now or in the future.

• Location and Workplace Flexibility

• Zelis is headquartered in the U.S., with multiple locations across the country and in Hyderabad, India. Check out our locations to learn more about our offices. All employee work locations are based on the needs of the position and are determined by the Leadership team. In-office work and activities vary based on work and team objectives in accordance with Company policies.

• While location expectations vary by role, candidates within approximately 50 miles of a U.S. office are generally preferred to support collaboration when needed. Our hybrid approach is flexible, and in-office presence is guided by team and business needs rather than a fixed weekly schedule.

• Base

• Salary Range

• $105,000.00 - $133,000.00

• At Zelis we are committed to providing fair and equitable compensation packages. The base salary range allows us to make an offer that considers multiple individualized factors, including experience, education, qualifications, as well as job-related and industry-related knowledge and skills, etc. Base pay is just one part of our Total Rewards package, which may also include discretionary bonus plans, commissions, or other incentives depending on the role.

• Zelis’ full-time associates are eligible for a highly competitive benefits package as well, which demonstrates our commitment to our employees’ health, well-being, and financial protection. The US-based benefits include a 401k plan with employer match, flexible paid time off, holidays, parental leaves, life and disability insurance, and health benefits including medical, dental, vision, and prescription drug coverage.

• Equal Employment Opportunity

• Zelis is proud to be an equal opportunity employer. All qu