[Hiring] Senior Full Stack Software Engineer @NXTThing RPO

Role Description

We are seeking a Senior Full Stack Developer with expertise in Ruby on Rails, React, AWS, and modern cloud-native development practices to join our growing development team. This is a long-term contract opportunity for a highly skilled engineer who enjoys building scalable web applications, designing robust architectures, and working in a fast-paced environment.

Key Responsibilities

• Design, develop, and maintain highly scalable web applications using Ruby on Rails on the backend and React.js/TypeScript on the frontend.
• Architect and implement robust, scalable, secure, and maintainable backend solutions, integrating multiple data sources and databases.
• Develop responsive and user-friendly front-end interfaces using React.js, TypeScript, HTML5, and CSS3.
• Design and optimize PostgreSQL database schemas, queries, indexing strategies, and overall database performance.
• Build and maintain RESTful APIs and GraphQL services for internal and external integrations.
• Optimize application performance, reliability, maintainability, and security across the entire technology stack.
• Ensure high code quality through best practices, including code reviews, unit testing, integration testing, and end-to-end testing.
• Collaborate with product managers, business stakeholders, designers, and engineering teams to define, design, and deliver new features.
• Work with AWS services (EC2, ECS/EKS, S3, RDS, SES, Lambda, CloudWatch, IAM, Route53, etc.) to ensure high availability, scalability, and security of applications.
• Develop and maintain containerized applications using Docker.
• Maintain and improve CI/CD pipelines to streamline testing, deployment, and release processes.
• Implement monitoring, logging, and observability solutions using tools such as CloudWatch, Datadog, New Relic, Sentry, or similar platforms.
• Participate in architectural discussions, technical planning, and technology selection decisions.
• Mentor junior developers and contribute to engineering best practices.
• Stay current with emerging technologies, industry trends, and software development best practices.

Qualifications

• 7+ years of professional software development experience, including significant experience building and maintaining production-grade web applications.
• Strong expertise in Ruby on Rails, with a deep understanding of Ruby and its ecosystem.
• Strong understanding of object-oriented programming principles, software design patterns, and scalable application architecture.
• Extensive experience with React.js and modern JavaScript (ES6+).
• Strong experience with TypeScript in modern React applications.
• Experience with HTML5, CSS3, responsive design, and modern front-end development practices.
• Familiarity with state management libraries such as Redux and React Context.
• Strong knowledge of RESTful API design, GraphQL, and API security best practices.
• Experience designing and optimizing PostgreSQL databases, including schema design, indexing, and performance tuning.
• Experience integrating and managing multiple databases and external data sources.
• Comfortable using AI-assisted development tools (such as GitHub Copilot, Cursor, Claude Code, or similar) to improve productivity, while maintaining the ability to independently design, write, debug, and maintain production-quality code.
• Demonstrated ability to critically review, test, troubleshoot, and refine AI-generated code.
• Understanding of MVC architecture, ORM frameworks, and domain-driven design principles.
• Experience with Docker and containerized application development.
• Experience building and maintaining CI/CD pipelines.
• Hands-on experience deploying and managing applications within AWS environments.
• Knowledge of web application security principles, including authentication, authorization, OWASP best practices, and secure API design.
• Experience with Git and modern version control workflows.
• Strong problem-solving, communication, and collaboration skills.
• Demonstrated ability to take ownership of projects from conception through deployment and ongoing support.
• Ability to work independently with minimal supervision and refine requirements in collaboration with business stakeholders.
• Ability to overlap East Coast hours at least from 8:00 AM – 12:00 PM ET.

Preferred Qualifications

• Experience with distributed systems, microservices architecture, and event-driven applications.
• Experience with Redis, Sidekiq, Elasticsearch/OpenSearch, or similar technologies.
• Experience integrating third-party APIs and AI/LLM platforms such as OpenAI, Anthropic, or AWS Bedrock.
• Experience with infrastructure-as-code tools such as Terraform or CloudFormation.
• Advanced or fluent Russian/Belarusian language skills.
• Bachelor's or Master's degree in Computer Science, Software Engineering, or equivalent practical experience.
• Experience mentoring developers and leading technical initiatives.

Join Us

If you're ready to take your career to the NXT level and make a meaningful impact in a fast-paced, innovative environment, we want to hear from you. Join us at NXTThing RPO and be part of a team that's shaping the future of recruitment process outsourcing. Apply now and unleash your potential with us.