Senior Software Engineer

Lowenstein Sandler is a one of the most sophisticated law firms in the United States, with over 400 lawyers and 300 business services professionals serving clients from offices in New York, Palo Alto, Roseland, Salt Lake City, San Francisco, Washington, D.C., and Wilmington. We recruit candidates who seek a collaborative, entrepreneurial culture that prioritizes our clients, our colleagues, and the communities where we work and live. Committed to career development and to an inclusive workplace, the firm offers many programs and opportunities for personal and professional growth. We seek professionals for our business services group who share these values.

The Senior Software Engineer plays a central role within the Software Engineering team responsible for designing, developing, and delivering high-quality, full-stack applications across the firm's enterprise technology ecosystem. This role requires a seasoned engineer who thrives in a fast-paced environment, can turn around solutions quickly without sacrificing quality, and actively integrates AI tooling into their development workflow. This individual serves as a mentor to junior engineers, helping to raise the technical bar across the team.    

Key Responsibilities:

• Design, develop, test, deploy, and maintain full-stack enterprise web applications using C#, .NET, React, Node.js, and MS SQL Server, including the ongoing refactoring, modernization, and support of an existing portfolio of internally developed line-of-business applications primarily built on C#/ASP.NET MVC and SQL Server.        
  
• Collaborate with the Sr. AI Architect to plan, implement, and integrate AI capabilities, including LLM APIs and AI-assisted features, into scalable, maintainable solutions that span the firm's legal technology stack, including custom applications leveraging data from Aderant, Dayforce, Intapp, SharePoint Online, and the firm's MS Fabric Data Lakehouse.
  
• Design and develop agentic AI applications that automate multi-step legal workflows, integrating large language models, tool-calling, and orchestration frameworks to deliver intelligent, process-driven solutions across the firm's practice groups.
  
• Maintain a structured intake and delivery pipeline for AI-assisted application requests, applying engineering rigor, security review, data governance standards, and integration best practices to ensure each solution meets firm-wide quality and compliance requirements.
  
• Build, consume, and maintain RESTful APIs and web services; design API contracts and ensure standards-compliant integrations across internal and third-party systems.
  
• Leverage Claude Code within VS Code and other AI-powered development tools to accelerate delivery, improve code quality, and drive engineering efficiency.
  
• Provide escalation-level troubleshooting and support for internally developed applications, serving as a subject matter expert for complex issues across the team's application portfolio.
  
• Mentor junior software engineers through code reviews, pair programming, technical guidance, and knowledge sharing.
  
• Participate in QA processes, patch management, release control, and ongoing production support for application services.
  
• Collaborate with IT infrastructure, data engineering, and business stakeholders to deliver end-to-end solutions.
  
• Stay current on emerging technologies, tools, and best practices, particularly in AI-assisted development and Microsoft technologies.

Essential Job Requirements:

• 5 - 7+ years of full-stack software development experience with a strong focus on Microsoft technologies.
  
• Proficiency in C#, .NET (Core and Framework), React, Node.js, JavaScript/TypeScript, HTML, CSS, and T-SQL.
  
• Demonstrated experience designing, developing, and consuming RESTful APIs and web services (JSON, REST, XML, SOAP).
  
• Proven hands-on experience with MS SQL Server, including schema design, stored procedures, query optimization, and performance tuning.
  
• Demonstrated experience integrating AI tools and services into the software development lifecycle, including AI-assisted coding, LLM API integrations, or intelligent workflow automation.
  
• Proven experience using Claude Code integrated with VS Code (or equivalent AI-powered IDE tooling) as part of a regular development workflow.
  
• Ability to deliver high-quality work quickly in a fast-paced, deadline-driven environment, with a track record of managing competing priorities effectively.
  
• Demonstrated ability to mentor and develop junior engineers, fostering a culture of learning, code quality, and technical rigor.
  
• Experience with SharePoint Online, Azure services, and IIS-hosted application environments.
  
• Familiarity with DevOps practices including source control (Git), CI/CD pipelines, and release management. 

Skills, Knowledge and Abilities:

• Bachelor's degree in Computer Science, Information Systems, or a related field, or equivalent practical experience of 7+ years in a full-stack engineering role.
• Core Stack: C#, .NET (Core/Framework), React, Node.js, JavaScript/TypeScript, HTML5, CSS3, T-SQL, MS SQL Server.
  
• APIs: RESTful API design and development, JSON, XML, OAuth 2.0, OpenAPI/Swagger
  
• AI Development: Claude Code, GitHub Copilot, Azure OpenAI or equivalent LLM integrations, prompt engineering.
  
• Cloud & Infrastructure: Microsoft Azure, IIS, SharePoint Online, Entra ID.
  
• Tools: Visual Studio / VS Code, Git, Azure DevOps, SQL Server Management Studio.
  
• Microsoft Fabric and Power BI experience a plus.
  
• Low-Code/Platform: Microsoft Power Platform (Power Automate, Power Apps), Outsystems a plus.
  
• Law firm application experience (Aderant, Intapp, iManage, InterAction) a plus.
  
• Strong analytical and problem-solving skills with excellent attention to detail.
  
• Exceptional communication skills, with the ability to translate technical concepts for non-technical stakeholders.
  
• Proven ability to work both independently and collaboratively in a team-oriented environment.
  
• A continuous learner who actively tracks and experiments with emerging tools, especially in the AI/ML space.

Office Location: Roseland, NJ (Hybrid)
Schedule: Full-Time, Monday through Friday, 9:00 AM – 5:00 PM
Amount of Travel Required: None

The expected salary range for candidates meeting the requirements of this position is $145,000 to $165,000. The range provided is the salary that Lowenstein Sandler in good faith believes at the time of this posting that it is willing to pay for the advertised position. Exact compensation will be determined based on individual candidate qualifications and location. Our benefits package includes coverage options for medical, dental, vision, prescription drug, life insurance, disability, FSAs, 401K, and paid time off.

Disclaimers:
This job description is not designed to cover or contain a comprehensive listing of all activities, duties, or responsibilities required by employee.

Lowenstein Sandler LLP is not accepting resumes from search firms for this position. Regardless of past practice, all resumes submitted by search firms are to be deemed the sole property of Lowenstein Sandler LLP, and no fee will be paid in the event the candidate is hired by Lowenstein Sandler LLP as a result of the referral.

Lowenstein Sandler LLP is committed to equal employment opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. We value and encourage diversity and solicit applications from all qualified applicants without regard to race, color, gender, sex, age, religion, creed, national origin, ancestry, citizenship, marital status, sexual orientation, physical or mental disability, medical condition, veteran status, gender identity, genetic information, or any other characteristic protected by federal, state, or local law.