Serjeel Ranjan

Full Stack Engineer

Gurugram, Haryana, India3 yrs 10 mos experience

AI EnabledAI ML Practitioner

Key Highlights

Expert in full-stack development with microservices architecture.
Mentored over 1,000 professionals in coding and algorithms.
Integrated AI services to enhance decision-making processes.

Stackforce AI infers this person is a Full Stack Developer with expertise in logistics and decentralized finance.

Contact

serjeel.ranjan.sde@gmail.com LinkedIn

Skills

Core Skills

Apache KafkaNode.jsElasticsearchReact.jsJavascriptData StructuresAlgorithmsC#

Other Skills

golangAmazon DynamodbDomain-Driven Design (DDD)Event Driven ProgrammingRedisMongoDBGraphQLPython (Programming Language)MidjourneyGitGitHubGo (Programming Language)Cascading Style Sheets (CSS)Decentralized Applications (DApps)Java

About

I’m a Full Stack Developer at Delhivery, working on the Core Operating Systems that powers one of India’s largest logistics networks. My work centers on understanding operational challenges and translating them into robust, scalable solutions that improve delivery speed, reliability, and ultimately customer satisfaction. Whether it’s collaborating with ops teams to refine workflows or fine-tuning system performance during peak loads, I care deeply about building tech that solves real business problems. With over 3 years of experience in full-stack development, I’ve designed and deployed microservices architectures serving thousands of daily users, integrated AI services (OpenAI, Hugging Face) to simplify decision-making, and optimized high-throughput pipelines with Kafka and RabbitMQ to ensure reliability at scale. I’ve also explored decentralized finance, contributing to projects on the Fantom Opera blockchain where I honed my skills in performance optimization and security—principles I now apply across industries. Beyond engineering, I’m passionate about empowering people with technology. As a Teaching Assistant at Scaler Academy, I’ve mentored 1,000+ professionals, helping them break down complex coding challenges into practical, elegant solutions. Whether building intuitive UIs with React, designing efficient backends in Node.js, Python, and Go, or deploying resilient cloud-native systems on AWS, I thrive in fast-paced environments where technical creativity meets business impact. 💻 Explore my work on GitHub: github.com/Serjeel-Ranjan-911

Experience

3 yrs 10 mos

Total Experience

1 yr 6 mos

Average Tenure

8 mos

Current Experience

Delhivery

Full Stack Developer

Sep 2025 – Present · 8 mos · Gurugram, Haryana, India · Hybrid

Maintain and optimize high-performance geofence and movement-tracking services handling real-time spatial computations for thousands of concurrent devices using distributed microservices and advanced geometric algorithms.
Enhance and monitor event-driven data processing pipelines leveraging Kafka, Elasticsearch, and geospatial algorithms (polygon containment, geohash indexing) to ensure sub-second latency and reliable geofence violation detection.
Support and improve large-scale event-sourcing and state management platforms built on Kafka, Redis, and Elasticsearch, ensuring 99.99% uptime, consistent data synchronization, and complete auditability across services.
Maintain and fine-tune distributed job scheduling and reliability frameworks using Redis, Kafka, and DynamoD, implementing fault-tolerant mechanisms, execution accuracy monitoring, and performance optimizations that reduced operational costs by 40%.

Apache KafkagolangNode.jsAmazon DynamodbElasticsearchDomain-Driven Design (DDD)+1

Speakx (formerly yellow class)

Software Engineer

Sep 2023 – Aug 2025 · 1 yr 11 mos · Gurugram, Haryana, India · On-site

Collaborating closely with cross-functional teams to deliver high-performance, scalable, and reliable API solutions that drive digital products and services.
Designing, developing, and maintaining robust APIs using Node.js and related technologies.
Optimize existing APIs for performance, scalability, and reliability.
Working with databases such as MongoDB to manage and maintain data structures and queries.
Integrating APIs with React/Next and Flutter based applications.
Collaborating with product managers and other stakeholders to understand and fulfill business requirements.

Node.jsReact.jsMongoDBJavaScriptGraphQLPython (Programming Language)+4

Scaler

DSA Teaching Assistant

Jun 2022 – Jan 2023 · 7 mos · Remote · Remote

Focus on preparing students for technical interviews and enhance their understanding of data structures and algorithms with my key roles being:-
Conducting tutorials and practice sessions on data structures and algorithms, offering personalized support to students to deepen their understanding of key concepts.
Led workshops to help students prepare for technical interviews, including coding challenges, whiteboard exercises, and problem-solving techniques.
Evaluating student progress through assessments and provided constructive feedback to guide their learning and improvement.
Providing one-on-one mentorship and guidance to students, helping them overcome challenges and achieve their goals.
Developing supplementary learning materials such as cheat sheets, practice problems, and guides to assist students in their study and preparation.
Provided advice and support to students who are doing career change regarding career paths in technology, including resume building and job search strategies.

Data StructuresAlgorithmsJavaLow-Level DesignHigh-Level DesignPython (Programming Language)+2

Janus softwares

Frontend Web Developer

Apr 2022 – Jul 2023 · 1 yr 3 mos · Thane, Maharashtra, India · On-site

As a Frontend Development Intern at SpritSwap, I contributed to building the front end for a decentralized exchange (DEX) on the Solana blockchain network. This role provided me with valuable experience in decentralized finance (DeFi) and cutting-edge blockchain technology.
Created and maintained front-end components using modern frameworks such as React, ensuring seamless integration with the Solana blockchain.
Collaborated with blockchain developers to integrate smart contracts and decentralized applications (dApps) into the front-end, enabling secure and efficient trading on the DEX.
Adhered to security best practices for blockchain and web development, safeguarding user data and transactions.
Worked closely with cross-functional teams, including designers and backend developers, to translate complex technical requirements into functional and visually appealing interfaces.
Through this internship, I gained hands-on experience in building and optimizing the front end for a decentralized exchange on the Solana blockchain. My work at SpritSwap helped enhance the DEX's functionality and user experience, contributing to the company's growth and reputation in the DeFi space.

React.jsCascading Style Sheets (CSS)Decentralized Applications (DApps)JavaScript

Hackernoon

Frontend Developer Intern

Jan 2022 – Jun 2022 · 5 mos · Colorado, United States · Remote

My role involved working with modern web technologies such as React and Next.js to create user-friendly, responsive, and efficient web applications.
Developed and maintained front-end features for blogging websites using React and Next.js, ensuring a smooth and engaging user experience.
Implemented responsive design principles to create web pages that adapt seamlessly to various devices and screen sizes.
Collaborated with backend developers to integrate RESTful APIs and GraphQL endpoints, enabling seamless data flow between the front-end and back-end systems.
Worked on optimizing web applications for performance, including techniques such as code splitting, lazy loading, and image optimization.
Worked on quality content for better SEO optimization.
Collaborated with design and product teams to translate wireframes and mockups into interactive and visually appealing web pages.

React.jsNode.jsCascading Style Sheets (CSS)Next.jsGitGitHub

Samsung electronics

Software Engineer Intern

Jul 2021 – Dec 2021 · 5 mos · Coimbatore, Tamil Nadu, India · Hybrid

I worked on the development of a log analyzer tool designed to simplify the process of accessing and analyzing large volumes of logs.
Designed and implemented a log analyzer tool using modern programming languages and frameworks, focusing on efficient parsing and processing of large log files.
Developed algorithms for organizing log data, enabling easy searching, filtering, and categorization based on various parameters such as date, severity, and source.
Optimized the tool for speed and efficiency, ensuring quick access to and processing of log data even with large datasets.

C#Qt