Senior Backend Developer .NET

We are looking for a highly skilled Senior .NET Developer to take ownership of critical backend services in our platform. You will lead the end-to-end development process, including solution design, architecture, implementation, performance optimization, and technical support.

This role requires collaboration with the Product and Customer Support teams to understand business needs, define technical solutions, and deliver scalable, secure, and high-performing applications. You will also mentor junior team members, ensure code quality, and proactively monitor and resolve system issues. Your leadership, technical expertise, and commitment to excellence will drive the success of our projects.

Our Tech Environment

Back-End

• .NET Core for building scalable microservices and RESTful APIs.
• SQL Server with Entity Framework for data storage and access.
• Identity Server for secure authentication and authorization.

Front-End

• ReactJS, TypeScript for Web applications.
• Electron, [protected info], Angular 2+, ReactJS for desktop applications.
• React Native for mobile application.

AWS Services

• Compute & Networking: EC2, VPC, ELB.
• Storage & Databases: S3, ElasticCache, OpenSearch, Transfer Family.
• Serverless & Messaging: ECS, Lambda, StepFunctions, MSK, EventBridge, SQS, SNS, SES.
• Security & Management: WAF, Route53, CloudWatch, CloudTrail, Inspector, KMS.
• APIs & Edge: API Gateway, CloudFront.
• Identity & Code Management: Cognito, CodeArtifact.

How You'll Make an Impact

• Be the owner and fully control at least one service or functional area, including solution, architect, DB, detailed design, coding, code review, deployment, monitoring, and support.
• Actively participate in the Product Requirements Document (PRD) discovery phase to clarify and understand business problems and objectives.
• Identify boundaries and create architectures to build robust, scalable, secure, highly available, and reliable systems.
• Collaborate with the frontend team to define data models and API endpoints to serve our business needs best.
• Identify impacted areas and services, define the scope of testing, and mitigate risks to prevent service degradation.
• Write, review, and refactor code following best practices to ensure optimal performance, security, usability, and reusability.
• Define, implement, and execute unit testing.
• Use CI/CD best practices to deploy, monitor, detect, and forecast issues, discuss solutions, and follow up.
• Effectively communicate and explain business logic, technical decisions, and solutions in your area of responsibility to stakeholders, including non-technical audiences.
• Monitor system performance, proactively detect and forecast potential issues, discuss solutions, and follow up on resolutions.
• Identify, debug, and resolve complex issues, including technical support cases, and explain solutions to non-technical users.
• Support and coaching for at least 2 junior members, or open a training session for members in a team, group, or company.
• Collaborate smoothly with other team members, cross-team, and cross-group to get things done in a timely manner with optimal solutions.
• Be a person that others come to ask for solutions or advice.
• Show the ownership & responsibility.

• 5+ years of relevant experience (or demonstrated rapid technical growth if fewer years).
• Good knowledge of infrastructure concepts (e.g., networking, servers, CI/CD pipelines, containerization, etc.).
• Solid understanding of DDD (Domain Driven Design), EDA (Event Driven Architecture) and Microservices Architecture.
• Solid understanding of OOP principles and clean code best practices.
• Proficiency in C# and .NET Core framework.
• Solid understanding of designing secure and reliable RESTful APIs.
• Solid understanding of the AWS cloud platform.
• Experience in performance optimization for Database and Back-end system.
• Experience in building a data-intensive system.
• Ability to understand business requirements and translate them into technical requirements.
• Ability to self-learn and adapt to new business and technologies quickly

Nice to have:

• Experience in Security and Pentest.
• Knowledge of e-commerce.
• The ability to train and coach Junior Developers.
• Intermediate English communication skills.

• Attractive salary package
• Opportunity to become a Team Leader/ Technical Leader.
• Building large-scale SaaS for global.
• Healthcare: Annual health check-up, Premium Healthcare Insurance for you and your loved ones.
• International working environment, flat and transparent organization.
• Working & growing with Young, Ambitious & Talented Team.
• Flexible working time, from Monday to Friday.
• Work hard, rest well: Enjoy 15 days of annual leave.
• Prioritizing a work-life balance with the flexible work-from-home policy.
• Various training on hot-trend technologies, best practices, and soft skills.
• Social - Health - Insurance paid fully.
• Free in-house entertainment facilities, coffee, and snack.
• Company trip, big annual year-end party every year, team building, etc.

And much more, join us and let yourself explore other fantastic things!