Senior Software Engineer
Epsilon Solutions Ltd
Senior Software Engineer
Remote 12 Months Video Interview As a Senior Software Engineer on the nearshore team, you will serve as a senior full-stack developer for our B2B and B2C SaaS products, with a focus on building secure, scalable, and customer-centric platforms. You'll be hands-on with frontend and backend development across our React/TypeScript and NestJS/Node.js stack. This is a great opportunity to shape innovative applications that secure millions of small businesses and consumers while deepening your expertise in cybersecurity — a rapidly growing and impactful domain.
Key Responsibilities
Feature Development & Delivery
Deliver new technical features for B2B and B2C SaaS products. Work closely with fellow engineers, the Product Manager, and UX Designer to scope engineering requirements and timelines for features. Anticipate and communicate blockers and delays before they require escalation. Continuously help improve the engineering culture, including practices and processes. Explore and prototype the use of generative AI and large language models (LLMs) to drive product innovation.
Programming & Implementation
Write and deliver clean, maintainable, and well-tested code. Implement front-end UI components using TypeScript and React Framework. Implement RESTful API endpoints using TypeScript, NestJS, and Node.js. Participate in peer code reviews to maintain code quality and adhere to engineering best practices. Collaborate with developers to build reusable code and libraries for future use. Implement software security requirements. Leverage new and cutting-edge developer tools to enhance productivity and code quality. Integrate APIs and services to deliver intelligent product features where applicable.
Software Design
Design API endpoints for features, define schemas, and generate documentation. Design reusable and scalable React components for the front-end UI. Make sound software design decisions with a focus on customer experience. Consistently create optimal designs adhering to architectural best practices. Consider system performance, scalability, and reliability when defining technical designs. Design and implement Model Context Protocol (MCP) and Retrieval-Augmented Generation (RAG) pipelines to enable smart solutions.
Testing & Quality Assurance
Deliver well-tested code. Write unit tests for APIs and front-end components.
Maintenance & Support
Troubleshoot, debug, maintain, and improve existing software. Fix bugs, performance issues, and security vulnerabilities in the software. Occasionally be on-call to resolve customer issues and address server alerts as needed.
Required Qualifications
5+ years of experience in software engineering. Experience writing code in JavaScript/TypeScript, HTML5, CSS3, or related applications. Experience with front-end technologies and frameworks, preferably React. API design and development experience using NestJS and Node.js. Experience with application, network, and cloud security. Experience with building and architecting microservices. Strong computer science fundamentals and problem-solving/analytical skills. Familiarity with version control systems (e.g., Git). Understanding of agile software development lifecycle and DevOps principles. Strong verbal and written communication skills, including the ability to communicate and explain technical decisions. Good written and spoken English proficiency is required; this role involves regular communication with US-based stakeholders via Slack, Azure DevOps, and video calls.
Preferred Qualifications
Experience writing unit tests using testing frameworks such as Mocha, Jest, etc. Understanding of SaaS (Software as a Service) product architectures, AWS/Azure/Google Cloud Stack, and networking. Familiarity with developer tools like Claude Code. Experience with designing AI-enhanced systems such as Model Context Protocol (MCP), Retrieval-Augmented Generation (RAG) pipelines, and vector databases (e.g., Pinecone, Weaviate).
Education
Bachelor's degree in computer science or equivalent work experience
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