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Full Stack Senior Engineer (.NET/React)

Great Gray
Boston, MAonsiteMar 18, 2026·Posted 24 days ago
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Domain

Tech Stack

.NET CoreReactAngularNext.jsSQL ServerPostgreSQLMySQL

Must-Have Requirements

  • 5+ years of software engineering or development experience
  • 3+ years of experience in a compiled language (ex. .NET, Java)
  • Strong experience with RESTful APIs, microservices architecture, and event-driven systems
  • Strong proficiency in SQL Server, PostgreSQL, or MySQL
  • Experience with front-end technologies like Angular, React, or Next.js
  • Authorization to work directly for any employer in the United States without visa sponsorship

Description

Why Great Gray? At Great Gray Group, we strive to set the bar for the retirement services industry. Our goal is to deliver advanced retirement solutions that combine our core fiduciary services with robust investment options, innovative technology, and dedicated client service. We focus on making choices clearer, transitions smoother, and the client experience more delightful. Complacency isn't in our vocabulary. Every day, we look for opportunities to better serve our clients, be an excellent business partner, and earn the trust of those who rely on us.

The Role Great Gray is looking to add a Full Stack Senior Engineer (.NET/React) on our Technology team. The engineer we seek comes with strong experience in compiled languages (ex. .NET, Java), and solid experience with frontend languages and frameworks (ex. JavaScript, Angular, React, Vue). You will be working collaboratively within an agile team, contributing to architectural decisions, and championing best practices in software development.

If you believe in DevOps principles, value continuous delivery, and understand that quality is a shared responsibility you will do well here. Our team members are expected to take full ownership of our products as well as embrace efficiency and continuous improvement. We are not looking for a few rock stars, but rather very strong team players that wish to collaborate to create fantastic software.

This is an exciting opportunity to grow alongside Great Gray as we expand, integrate, and build cutting-edge solutions. Your ability to mentor, solve complex technical challenges, and drive results will multiply the effectiveness of your team and shape the future of our technology

Location This position will work from our Boston, MA office. Great Gray currently supports a hybrid work model with 4 days onsite, and 1 day remote.

Visa sponsorship or transfer of an existing visa is not available for this position. Applicants must be authorized to work directly for any employer in the United States without visa sponsorship or transfer.

Responsibilities

· Develop and enhance scalable, maintainable, cost-effective cloud solutions using .NET Core, ensuring high performance and reliability. · Collaborate closely with cross-functional teams to translate business requirements into efficient, maintainable, scalable, and high-quality solutions. · Drive technical excellence through thorough code reviews, identifying opportunities for optimization, and enforcing best practices in code quality, security, and performance. · Proactively monitor and maintain business-critical platforms and services, ensuring high availability and seamless user experiences. · Diagnose and resolve complex technical issues, minimizing downtime and continuously improving system efficiency. · Contribute to innovation by exploring emerging technologies, design patterns, and architectural improvements to keep our solutions cutting-edge. · A problem-solving mindset and the ability to contribute to technical discussions. · Strong collaboration skills, fostering an environment of shared learning and innovation. · A passion for best practices, design patterns, and driving excellence in development. · The ability to balance multiple priorities while maintaining high-quality outcomes. · Complete other related duties as assigned

Required Qualifications & Experience · Exhibits our Great Gray values: Growth Mindset, Disciplined Curiosity, Grit, Results Ownership, Collaboration. · 5+ years of software engineering or development experience with 3+ years of experience in a complied language (ex. .NET, Java). · Strong experience with RESTful APIs, microservices architecture, and event-driven systems. · Strong proficiency in SQL Server, PostgreSQL, or MySQL. · Experience with front-end technologies like Angular, React, or Next.js

Preferred Qualifications & Experience · A solid understanding of software architecture principles and experience implementing design patterns. · Ability to thrive in a fast-paced, dynamic environment and manage multiple priorities effectively. · A growth mindset with an eagerness to learn new technologies and adapt to evolving challenges. · Comfortable navigating ambiguity. · Entrepreneurial mindset to bring best practice ideas to the team. · Hands-on experience with Azure services and designing scalable, cost-effective cloud solutions.

Tech Stack Our current tech stack is a blend of existing and next-gen tools/languages, and like our company itself, our software is always evolving. · Frontend: Angular, React · Backend: C# .NET · Data Layer: MSSQL, Python, Postgres, Databricks · Infrastructure: Azure cloud · Tooling: Cypress, Docker, GitHub, Cursor, SonarQube

Base Pay Range* $130,000-$170,000 *This base pay range is subject to change and may be modified in the future.

The pay range displayed above is the base pay compensation range that Great Gray expects to pay for this position at the time of this posting. Individual compensation within this range depends on multiple factors, including, but not limited to, candidate’s prior education and relevant work experience and training as well as position location and local market demands. Our pay-for-performance culture also includes participation in an annual incentive bonus plan for this position which is not included in the ‘Base Pay Range’ noted above.

Location Context