Senior Software Engineer (C# / .NET / Microsoft SQL Server)

Senior Full-Stack Software Engineer (C# / .NET / Microsoft SQL Server) | Remote | LATAM
We are looking for a full-time, remote Senior Software Engineer (C# / .NET / Microsoft SQL Server) with 5+ years of software development experience using C#, .NET, and Microsoft SQL Server to join our U.S. client.
In this role, you will be a hands-on contributor on a product engineering team responsible for reporting, APIs, data-intensive services, and customer-facing applications. This is primarily a backend role with a strong data emphasis, and you will be expected to take ownership of what you build from problem definition through production.
Founded in 2003, our client transforms the traditional restaurant point-of-sale (POS) terminal into an integrated 360-degree operational management system. Their solution increases brand loyalty through improved customer experiences, optimizes operations resulting in lower costs, and increases sales volumes through comprehensive analytics and employee performance insights. Over 7,000 locations use their technology today processing $5 Billion in daily sales.
Responsibilities
Design, build, test, deploy, and support production software using C#, .NET, and Microsoft SQL Server
Build and maintain APIs, backend services, reporting functionality, and data-intensive application features
Work hands-on with large SQL Server databases containing hundreds of millions of rows and potentially terabytes of data
Write and optimize complex T-SQL, stored procedures, queries, and data-access patterns
Design practical relational data models that balance maintainability, performance, and delivery needs
Diagnose application and database performance problems using execution plans, indexing strategies, query analysis, and production telemetry
Work effectively with clustered and nonclustered indexes, large-table strategies, partitioning, locking, blocking, and concurrency
Investigate production issues, identify root causes, and implement fixes
Own software beyond implementation, including deployment, monitoring, troubleshooting, and production support
Make pragmatic engineering decisions that balance quality, technical risk, delivery speed, and customer impact
Work in existing codebases and improve them incrementally rather than requiring large rewrites
Translate business needs and imperfect requirements into working software
Make frontend changes when necessary, including HTML, CSS, JavaScript, and modern web frameworks
Review code and provide clear, actionable feedback
Communicate progress, blockers, technical decisions, and tradeoffs clearly with engineers, product managers, and other stakeholders
Required Experience
Excellent English communication skills
5+ years of professional software development experience
5+ years of experience with C# and modern .NET
2+ years of experience with HTML, CSS, JavaScript, and modern web frameworks
Expert level T-SQL skills
Proven hands-on experience working with production Microsoft SQL Server databases
Experience designing relational data models and making practical schema design decisions
Experience working with large datasets and high-volume database workloads
Strong understanding of SQL Server performance fundamentals, including clustered and non-clustered indexes, query execution plans, query and stored procedure optimization, large-table design and partitioning concepts, and transactions, locking, blocking, and concurrency
Experience building and consuming web APIs
Ability to independently investigate unfamiliar or ambiguous technical problems
Strong debugging and root-cause-analysis skills
Demonstrated ability to deliver working software in iterative increments
Comfortable taking ownership of code in production and participating directly in troubleshooting when issues occur
Comfortable working across application boundaries when needed rather than limiting yourself to a narrow specialty
Experience with Git and GitHub or similar source-control workflows
Proven delivery experience in a vibrant, dynamic startup environment
A collaborative approach, a can-do attitude, and a relentless pursuit to attain goals and solve problems
Trustworthy, team-oriented, and transparent
Desired Experience
University degree or relevant industry experience
Knowledge in Microsoft Azure
Experience with Docker and containerized applications
Reporting, analytics, or data-intensive application development
Observability, application monitoring, and production troubleshooting
CI/CD and automated deployment pipelines
Experience with SaaS, e-commerce, restaurant technology, or point-of-sale systems
Additional Information
Knowing your ideas are heard and matter think big!
You get to own your job and be recognized for your contributions
Work with smart and creative people
Making mistakes is human. Let's learn from them. Be transparent!
We recognize you as an individual no presumptions or judgment. Be the extraordinary you!
15 days Paid Time Off (PTO), 1 floating day, 3 sick days, and designated national holidays
Start: ASAP

Work arrangement
Yes