Senior Backend Developer - C# and .NET 10 (Remote, Full-Time) [AS239]
About Smart Working
At Smart Working, we believe your job should not only look right on paper but also feel right every day. This isn’t just another remote opportunity - it’s about finding where you truly belong, no matter where you are. From day one, you’re welcomed into a genuine community that values your growth and well-being.
Our mission is simple: to break down geographic barriers and connect skilled professionals with outstanding global teams and products for full-time, long-term roles. We help you discover meaningful work with teams that invest in your success, where you’re empowered to grow personally and professionally.
Join one of the highest-rated workplaces on Glassdoor and experience what it means to thrive in a truly remote-first world.
About the Role
We are looking for a Senior Backend Developer to join a collaborative product engineering team building and scaling a modern accommodation booking platform used by corporate travellers worldwide.
This role is focused on developing and evolving scalable backend services and APIs using C# and .NET 10, helping power critical booking, quoting, integration, and search functionality across the platform.
You will work closely with Product Managers, QA Engineers, Data teams, and other Engineers to deliver reliable, maintainable, and high-performing backend systems. The role involves a strong focus on API integrations, observability, CI/CD, and backend reliability in a fast-paced product environment.
The team is currently focused on scaling and enhancing an internal accommodation booking engine, including:
Accommodation search optimisation and advanced filtering
AI-enhanced quoting and booking experiences
Real-time integrations with third-party systems for booking management and synchronisation
Platform scalability, observability, and reliability improvements
This is a collaborative, backend-focused role suited to someone who enjoys solving complex integration and API challenges while contributing to engineering quality and platform evolution.
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Responsibilities
Design, develop, and maintain scalable backend services and APIs using C# and .NET 10
Build and maintain secure, reliable integrations with third-party systems and external APIs
Define and implement resilient and fault-tolerant API communication patterns
Troubleshoot and resolve complex backend and API issues, including connectivity and data consistency problems
Ensure systems are observability-first through effective logging, metrics, monitoring, and alerting
Create and maintain clear API integration documentation for internal and external stakeholders
Collaborate closely with Product Managers, QA Engineers, Designers, and Data teams to deliver high-quality features
Champion engineering best practices across testing, CI/CD, secure coding, and maintainability
Mentor junior developers and contribute to overall engineering excellence
Support ongoing platform scalability, integration, and performance improvement initiatives
Contribute to the evolution of the company’s API platform and backend architecture
Requirements
Strong proficiency in C# and .NET 10, with experience building scalable and maintainable backend systems
Strong experience designing, developing, and maintaining production APIs and backend services
Experience diagnosing and resolving complex backend and API issues
Experience working with CI/CD pipelines and deployment automation
Strong understanding of API design, backend reliability, and maintainable system architecture
Strong interpersonal and collaboration skills across cross-functional teams
Experience writing clear and maintainable API integration documentation
Pragmatic problem-solving mindset with strong attention to reliability and simplicity
Commitment to delivering high-quality, performant, and supportable solutions
Ability to work effectively in a collaborative, fast-moving engineering environment
Nice to Have
Experience with Azure Functions and serverless architectures
Experience working with multi-tenant or multi-organisation systems at scale
Familiarity with multicurrency implementations and internationalisation (i18n)
Familiarity with OpenAPI 3.0 / 3.1 standards
Experience using AI-assisted development tools such as Claude Code
Knowledge of Infrastructure-as-Code tools such as Terraform
Previous experience working on booking, marketplace, or travel-related platforms
Benefits
Fixed Shifts: 12:00 PM - 9:30 PM IST (Summer) | 1:00 PM - 10:30 PM IST (Winter)
No Weekend Work: Real work-life balance, not just words
Day 1 Benefits: Laptop and full medical insurance provided
Support That Matters: Mentorship, community, and forums where ideas are shared
True Belonging: A long-term career where your contributions are valued
5-Day AI Training: Hands-on AI Academy onboarding to get you building with AI from day one
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At Smart Working, you’ll never be just another remote hire.
Be a Smart Worker - valued, empowered, and part of a culture that celebrates integrity, excellence, and ambition.
If that sounds like your kind of place, we’d love to hear your story.
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