Sajann Kumar SSingh profile photo 1 on Tal

Sajann Kumar SSingh

Full Stack Developer | Java Spring Boot Backend | Angular React Frontend | 3+ Yrs | Open to Work

Dhanbad Block

3+ years of work experience

Valuefy
Apr 20233 yrsMar 2026

Thane, Maharashtra, India

Worked on full stack development across Angular, React, Node.js, Java, and Spring Boot for banking and wealth management products. - Shipped Angular modules across 4 banking and wealth management deployments with 0 critical bugs over 12 months using shared component libraries. - Engineered data-driven Angular components with multi-validation checks, reducing Ul/UX layout development time by 30% for fluid client requirements. - Incorporated the simple-keyboard package into legacy Form.io components, onboarding international clients requiring virtual Chinese and Arabic input. - Strengthened production security using Webpack obfuscation, achieving a 100% reduction in unauthorized client-side reverse-engineering and data-tampering attempts. - Built an HTML-to-PDF engine using Puppeteer and Cheerio, implementing backward-compatible layouts that cut generation time by 50% and formatting complaints from 8/month to 0. Seamlessly linked the backend with React. - Designed a user-onboarding module using Node.js to dynamically link complex entity relationships (beneficiaries/directors) and generate unified multi-party corporate documentation, reducing documentation time by 40%. - Deployed 5+ Java/Spring Boot microservices to perform real-time data transformation and stream processing, utilizing Kafka for high-throughput message routing. - Provisioned and exposed secure RESTful APIs using Spring MVC, Spring Security OAuth2, and OpenAPl specifications, ensuring reliable integration with internal and downstream enterprise systems. - Implemented stateless authentication and session caching by integrating JWT tokens with Redis, optimizing microservice security and reducing token validation latency. - Architected high-integrity ETL pipelines by benchmarking and implementing data flows using NiFi, Airbyte, and Talend.
MAQ Software
May 202211 mosMar 2023

Hyderabad, Telangana, India

Worked on software engineering and client-facing workflow improvements using C#/.NET MVC, frontend enhancements, and API integrations. • Streamlined client QA workflows using C#/.NET MVC, reducing testing time by 30% while increasing test coverage. • Enhanced UI with autofill, component filtering, and load time improvements, reducing client software usage time by 40%. • Integrated Azure DevOps REST API to extract and visualize project data, with delivery completed within 1 week.

Education

Lovely Professional University

Bachelor of Technology - BTech, Computer Science

Lovely Professional University

20203 yrs2023
Lovely Professional University

Diploma, Computer Science and Engineering

Lovely Professional University

20182 yrs2020

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Headline

Full Stack Developer | Java Spring Boot Backend | Angular React Frontend | 3+ Yrs | Open to Work

About

Full Stack Engineer | 3+ yrs Java Spring Boot + Angular/React Software engineer who dissects every topic to atomic detail—reading exhaustively for 100% clarity, even on minutiae. Perfectionist learner: master one thing completely before moving (Angular modules → RxJS → LLMs). Examples over theory always; need concrete demos to internalize "how" + "why." Conclusions mandatory—summarize context or I re-read source docs. People who’ve worked with me usually notice the same pattern: I don’t stop at “it works.” I keep pulling on the thread until I understand why it works, where it breaks, and how to make it safer and more scalable. Whether it’s hardening a password manager with AES-256, breaking a top-ranked LeetCode solution with an edge-case test, or mentoring juniors through tricky Angular state bugs, my default mode is the same: design thoughtfully, ship reliably, and leave the system in a better state than I found it. Valuefy (2023-2026): Shipped Angular modules for 4 banking/HNI clients—0 critical bugs in 12mo using shared components. Built React/Node PDF generator (50% faster, 8→0 complaints/mo). Deployed 25+ Spring Boot microservices (90% test coverage) for EAM data migration. Trained 2 juniors Angular from 0→independent in 6 weeks. MAQ Software (2022-23): C#/.NET QA workflows (30% faster testing), UI autofill (40% client time savings), Azure DevOps REST API (1-week delivery). Projects: AES-256 Chrome password vault (OAuth+Drive sync), React/Spring personal assistant w/ local LLM email summary (20% faster).

Location

Dhanbad Block

Work experience

Software Development Engineer at Valuefy, Apr 2023 - Mar 2026 · 3 yrs, Thane, Maharashtra, India, Worked on full stack development across Angular, React, Node.js, Java, and Spring Boot for banking and wealth management products. - Shipped Angular modules across 4 banking and wealth management deployments with 0 critical bugs over 12 months using shared component libraries. - Engineered data-driven Angular components with multi-validation checks, reducing Ul/UX layout development time by 30% for fluid client requirements. - Incorporated the simple-keyboard package into legacy Form.io components, onboarding international clients requiring virtual Chinese and Arabic input. - Strengthened production security using Webpack obfuscation, achieving a 100% reduction in unauthorized client-side reverse-engineering and data-tampering attempts. - Built an HTML-to-PDF engine using Puppeteer and Cheerio, implementing backward-compatible layouts that cut generation time by 50% and formatting complaints from 8/month to 0. Seamlessly linked the backend with React. - Designed a user-onboarding module using Node.js to dynamically link complex entity relationships (beneficiaries/directors) and generate unified multi-party corporate documentation, reducing documentation time by 40%. - Deployed 5+ Java/Spring Boot microservices to perform real-time data transformation and stream processing, utilizing Kafka for high-throughput message routing. - Provisioned and exposed secure RESTful APIs using Spring MVC, Spring Security OAuth2, and OpenAPl specifications, ensuring reliable integration with internal and downstream enterprise systems. - Implemented stateless authentication and session caching by integrating JWT tokens with Redis, optimizing microservice security and reducing token validation latency. - Architected high-integrity ETL pipelines by benchmarking and implementing data flows using NiFi, Airbyte, and Talend.

Associate Software Engineer at MAQ Software, May 2022 - Mar 2023 · 11 mos, Hyderabad, Telangana, India, Worked on software engineering and client-facing workflow improvements using C#/.NET MVC, frontend enhancements, and API integrations. • Streamlined client QA workflows using C#/.NET MVC, reducing testing time by 30% while increasing test coverage. • Enhanced UI with autofill, component filtering, and load time improvements, reducing client software usage time by 40%. • Integrated Azure DevOps REST API to extract and visualize project data, with delivery completed within 1 week.

Education

Bachelor of Technology - BTech, Computer Science, Lovely Professional University

Diploma, Computer Science and Engineering, Lovely Professional University