Headline

Software Engineer | Node.js • Express • Nest Js • PostgreSQL | Building Scalable & Efficient Systems

About

I design and ship scalable backend systems that power e-commerce, fintech, and venture capital platforms. With ~2 years of hands-on experience in Backend, I've optimized APIs for 47% performance gains, integrated complex payment gateways, and deployed AI-powered automations that cut manual work by 60%. At Spark Eighteen, I architect multi-tenant e-commerce backends with strict data isolation, build configurable promotions engines, and optimize complex database queries. I've worked across the full stack — from designing 50+ relational tables and implementing RBAC to deploying Redis caching strategies and Zapier workflows. I also led a NestJS migration that modernized our SaaS backend with zero downtime, and built VC deal-flow APIs with AI data normalization using Ollama (LLaMA 3.2). Beyond production work, I've built three full-stack projects: SkillXChange (peer-to-peer skill exchange with real-time chat via Socket.IO), HireBoard (job application tracker with Kanban views and email reminders), and DevPulse (GitHub analytics dashboard with OAuth and goal tracking). These projects showcase my ability to design systems end-to-end — from API architecture and database design to React frontends, Docker containerization, and cloud deployment. I'm passionate about: Performance: Query optimization, strategic indexing, caching patterns, and latency reduction Clean Architecture: Modular code, separation of concerns, and maintainable APIs Integrations: Third-party services (Zapier, LinkedIn APIs, Ollama), webhooks, and event-driven systems Automation: Background jobs, message queues (RabbitMQ, AWS SQS/SNS), and workflow automation Scalability: Multi-tenancy, RBAC, async processing, and cloud infrastructure (AWS) Tech Stack: Node.js, Express.js, NestJS, TypeScript, PostgreSQL, MongoDB, Sequelize, TypeORM, Prisma, Redis, AWS (S3, SQS, SNS, EC2), Docker, React, Socket.IO, Zapier, Ollama Currently: Backend Engineer at Spark Eighteen, building reliable, high-performance systems. Always open to: discussions on backend optimization, cloud architecture, full-stack insights, or career opportunities in tech. Let's connect! Contact: lakshyakumarsingh.2003.va@gmail.com

Location

Rishra

AI stack

claude code

cursor

ollama

openai

Work experience

Backend Engineer at Spark Eighteen, Apr 2026 - Present · 3 mos

Jr. Backend Engineer at Spark Eighteen, Apr 2025 - Apr 2026 · 1 yr 1 mo, Designed and shipped production backends across e-commerce, SaaS, and venture capital platforms, architecting scalable APIs, cloud infrastructure, and third-party integrations that improved performance by 47% and reduced manual work by 60%. Built multi-tenant systems with RBAC, implemented payment gateways (Razorpay, EasyEcom), and deployed AI-powered data automation using Ollama. Leveraged AWS (S3, SQS, SNS), Redis caching, PostgreSQL optimization, and modern frameworks (Express.js, NestJS) to handle complex relational data at scale. Established consistent API standards, improved response times through query optimization and strategic indexing, and collaborated with product and frontend teams to ship 25+ production endpoints serving high-traffic, mission-critical workflows.

Node js Intern at Spark Eighteen, Sep 2024 - Apr 2025 · 8 mos, Built backend APIs and core features for fintech, venture capital, and SaaS applications, gaining hands-on experience with cloud infrastructure, message queues, and third-party integrations in a production environment. Developed secure OTP-based banking features, optimized complex database queries for deal-flow platforms, and integrated third-party services including LinkedIn Data APIs and Zapier for automated workflows. Worked extensively with AWS cloud services (S3, SQS, SNS) for async processing, Docker for containerization and deployment pipelines. Contributed to integration testing, participated in code reviews, and supported production deployments across staging and live environments, learning full-stack backend development from infrastructure to API design.

Software Intern at Tech Mahindra, Aug 2024 - Sep 2024 · 2 mos, Kolkata, West Bengal, India, • Gained hands-on exposure to SAP tools and workflows, strengthening understanding of enterprise systems. • Improved collaboration and project delivery within a professional agile environment.

Education

Bachelor of Technology - BTech, Computer Science, Supreme Knowledge Foundation