# Utsab Dahal — Java Spring Boot Backend Developer, Kathmandu > The personal record of Utsab Dahal, a Java and Spring Boot backend developer in Kathmandu — selected works, the stack, the career ledger, and dispatches on Spring Boot, microservices and API design. Utsab Dahal is a Backend Developer — Spring Boot & DevOps based in Kathmandu, Nepal. He builds backend systems in Java and Spring Boot — REST APIs, authentication and authorization, and the schemas underneath them — and containerizes and ships them. This is his record: the work, the stack, the career ledger and the writing. ## Identity - **Name:** Utsab Dahal - **Role:** Backend Developer — Spring Boot & DevOps - **Location:** Kathmandu, Nepal - **Focus:** Spring Boot, Microservices & DevOps - **Education:** BCA Student at Aadim National College - **Email:** info@dahalutsab.com.np - **Working hours:** Sun–Fri, 9AM–6PM NPT - **GitHub:** https://github.com/dahalutsab - **LinkedIn:** https://www.linkedin.com/in/utsabdahal - **X:** https://x.com/utsabdahal0 - **Website:** https://dahalutsab.com.np/ - Java • Spring Boot — Backend-first engineer - 25+ — Projects & experiments - Kathmandu — NPT +05:45 · Remote-friendly - Currently — Building. Breaking. Learning. Shipping. ## Selected works 6 projects are on the record. Each has a page of its own; the markdown twin of each is linked below. ### Exhibit A — uChess: Java-Based Chess Engine A high-performance Java chess engine using Negamax, Alpha-Beta pruning, and quiescence search with bitboard optimization. - **Kind:** Algorithm Project - **Role:** Engine author - **Status:** Completed - **Stack:** Angular, Java, Spring Boot, Bitboards, Negamax, Alpha-Beta Pruning, Quiescence Search, Parallel Processing - **Source:** https://github.com/dahalutsab/chess_core - **Page:** https://dahalutsab.com.np/case-files/uchess - **Markdown:** https://dahalutsab.com.np/case-files/uchess.md ### Exhibit B — Interacta: Live Audience Engagement Platform An event-driven microservice platform where a host runs a live session and the audience joins by QR code — asking questions, upvoting and voting in polls without ever creating an account. - **Kind:** Event-Driven Microservices - **Role:** Backend developer, team of four - **Status:** In Development - **Stack:** Java 25, Spring Boot 4, Spring Cloud Gateway, Apache Kafka, Keycloak / OIDC, PostgreSQL, STOMP over WebSocket, MinIO (S3), Docker Compose, Angular, Python - **Source:** https://github.com/dahalutsab/interacta_services - **Page:** https://dahalutsab.com.np/case-files/interacta - **Markdown:** https://dahalutsab.com.np/case-files/interacta.md ### Exhibit C — One ID Nepal: A National Identity Provider for Nepal A centralized identity platform that lets any Nepali service offer "Sign in with One ID" the way it would offer Google or Facebook — with the citizen deciding what each app is allowed to read. - **Kind:** Identity Provider - **Role:** Backend developer, team Brogrammers - **Status:** Completed - **Stack:** Java, Spring Boot, Spring Authorization Server, OpenID Connect, OAuth 2.1 / PKCE, Spring Security, Spring Cloud Gateway, OpenFeign, PostgreSQL, Thymeleaf, Docker - **Source:** https://github.com/WE-BROGRAMMERS/one-id-nepal - **Page:** https://dahalutsab.com.np/case-files/one-id-nepal - **Markdown:** https://dahalutsab.com.np/case-files/one-id-nepal.md ### Exhibit D — CollegeHub: College Listing and Management Platform A centralized portal for managing and exploring colleges, with board-based filtering and direct application options. - **Kind:** Web Platform - **Role:** Backend developer - **Status:** Live - **Stack:** Angular, Spring Boot, Spring Security, MySQL, JWT, Admin Dashboard - **Source:** https://www.collegehubnepal.com - **Page:** https://dahalutsab.com.np/case-files/collegehub - **Markdown:** https://dahalutsab.com.np/case-files/collegehub.md ### Exhibit E — OpenMicHub: Artist Collaboration Platform A real-time artist performance platform with live interaction and virtual coin-based engagement. - **Kind:** Real-Time App - **Role:** Backend, team of four - **Status:** Completed - **Stack:** Angular, Spring Boot, MySQL, WebSocket - **Source:** https://github.com/dahalutsab/OpenMicHub - **Page:** https://dahalutsab.com.np/case-files/openmichub - **Markdown:** https://dahalutsab.com.np/case-files/openmichub.md ### Exhibit F — CMS: College Management System — dynamic school/college website School/college management system with dynamic website builder and academic tools like attendance and results. - **Kind:** Full-Stack Platform - **Role:** Backend developer - **Status:** Production - **Stack:** Angular, Spring Boot, MySQL, JWT - **Page:** https://dahalutsab.com.np/case-files/college-management-system - **Markdown:** https://dahalutsab.com.np/case-files/college-management-system.md ## Stack and proficiency ### Languages - **Java** (Advanced) — Primary language for backend development - **SQL** (Advanced) — Database queries and optimization - **TypeScript** (Intermediate) — Frontend and API development - **JavaScript** (Intermediate) — Web development and scripting ### Backend technologies - **Spring Boot** (Advanced) — Main framework for API development - **Spring Data JPA** (Advanced) — Database operations and ORM - **Spring Security** (Advanced) — Authentication and authorization - **REST APIs** (Advanced) — API design and implementation - **Hibernate** (Advanced) — ORM mapping and query tuning - **WebSocket / STOMP** (Intermediate) — Real-time fan-out to live sessions - **Apache Kafka** (Intermediate) — Event-driven service communication - **Keycloak / OIDC** (Intermediate) — Identity, OAuth2 and single sign-on - **Microservices** (Intermediate) — Distributed system architecture ### Databases - **MySQL** (Advanced) — Relational database management - **PostgreSQL** (Advanced) — Advanced SQL features - **Flyway** (Intermediate) — Versioned schema migrations - **MongoDB** (Intermediate) — NoSQL document database - **Redis** (Learning) — Caching and session management ### Frontend (supporting) - **Angular** (Intermediate) — Admin panels and dashboards - **HTML/CSS** (Intermediate) — Web markup and styling - **Bootstrap** (Intermediate) — Responsive design ### Tools - **Git** (Advanced) — Version control and collaboration - **Maven** (Advanced) — Builds and dependency management - **Postman** (Advanced) — API testing and documentation - **Swagger / OpenAPI** (Advanced) — API documentation - **Firebase** (Intermediate) — Cloud services integration ### DevOps - **Docker** (Intermediate) — Containerizing services for deployment - **Docker Compose** (Intermediate) — Orchestrating a multi-service stack - **Jenkins** (Intermediate) — Build and deployment pipelines - **Harbor** (Intermediate) — Private container registry - **Linux** (Intermediate) — Shell, services and deployment hosts ### Currently learning - **Kubernetes** (Learning) — Container orchestration - **System Design** (Learning) — Scalable architecture patterns - **Observability** (Learning) — Health checks, metrics and logs in production ## Commendations ### Winner — Aadim Intra-College Hackathon - **Awarded by:** Aadim National College - **Year:** 2024 - **Kind:** Competition Led team 'Brogrammers' to victory in the college-level hackathon, showcasing innovative backend solutions and collaborative development skills. Impact: Demonstrated leadership and technical expertise in a competitive environment ### Social Impact Award — Ambition Hackfest 2025 - **Awarded by:** National Hackathon - **Year:** 2025 - **Kind:** National recognition Received the Social Impact Award at Ambition Hack Fest for developing solutions that address real-world social challenges. Impact: Recognized for creating technology solutions with positive social impact ## Team Brogrammers The team he builds and competes with. - **Dhiraj Jirel** — Full Stack Developer (https://dhirajjirel.com.np) - **Pasang Gelbu Sherpa** — Backend Developer (https://pasanggelbusherpa.com.np) - **Chitra Prasad Acharya** — Frontend Developer (https://chitraprasadacharya.com.np) - **Utsab Dahal** — Backend Developer (https://dahalutsab.com.np) ## Career ledger ### Backend Developer — Startup Collaboration, Kathmandu - **Period:** Jul 2025 — Present - **Stack:** Spring Boot, Spring Security, PostgreSQL, REST APIs, Git - Collaborating with a small development team to build scalable backend systems using Spring Boot - Designing REST APIs and backend architecture for startup products - Contributing to database design, authentication, and system planning - Working closely with frontend developers to deliver end-to-end features ### DevOps Training — Broadway Infosys, Kathmandu - **Period:** 2026 - **Stack:** Docker, Docker Compose, Jenkins, Harbor, Kubernetes, Linux - Containerized applications with Docker and multi-stage builds - Orchestrated multi-service stacks with Docker Compose - Built CI/CD pipelines in Jenkins - Pushed and pulled images through a private Harbor registry - Worked with Linux hosts, services and deployment fundamentals - Covered Kubernetes deployments, services and probes ### Junior Software Developer — Aadim Innovation, Kathmandu - **Period:** Jan 2025 — Jun 2025 - **Stack:** Spring Boot, Spring Data JPA, Hibernate, PostgreSQL, Flyway, Angular, Maven, Git - Developed and maintained production-ready backend applications using Java and Spring Boot - Designed and implemented RESTful APIs integrated with Angular frontend applications - Built relational database models using Spring Data JPA, Hibernate, and PostgreSQL - Managed database schema migrations using Flyway - Collaborated with developers to deliver features, resolve production issues, and improve performance - Worked with Git and Maven throughout the software development lifecycle ### Freelance Developer — Brogrammers - **Period:** 2023 — Present - Delivered full-stack applications using Spring Boot and Angular - Implemented real-time features using WebSocket - Worked with cross-functional teams on project delivery ### Academic Projects — BCA, Aadim National College - **Period:** 2022 — Present - Built multiple full-stack applications - Explored various backend technologies and frameworks - Participated in hackathons and competitive programming ## Dispatches Articles on Spring Boot, backend architecture and API design. - **[Letting Anonymous Users Act: Participant Tokens in Spring Security](https://dahalutsab.com.np/dispatches/anonymous-participant-tokens-spring-security)** — How to enforce one vote per person, per-session scoping and moderation rules for users who never create an account — a second JWT issuer, a published JWK set, and a unique constraint on an identity that is not a person. Filed 3 August 2026 under Spring Security. 10 min read. Markdown: https://dahalutsab.com.np/dispatches/anonymous-participant-tokens-spring-security.md - **[Your API Gateway Cannot Proxy Your WebSocket](https://dahalutsab.com.np/dispatches/spring-cloud-gateway-cannot-proxy-websockets)** — Spring Cloud Gateway Server WebMVC cannot proxy a WebSocket upgrade, and it fails without saying so. What to do instead, how to authenticate a socket a browser cannot put a header on, and the SockJS origin trap that logs nothing at all. Filed 27 July 2026 under System Design. 8 min read. Markdown: https://dahalutsab.com.np/dispatches/spring-cloud-gateway-cannot-proxy-websockets.md - **[Building Scalable REST APIs with Spring Boot](https://dahalutsab.com.np/dispatches/building-scalable-rest-apis-spring-boot)** — A comprehensive guide to designing and implementing RESTful APIs using Spring Boot, covering best practices for authentication, validation, and error handling. Filed 15 January 2024 under Spring Boot. 8 min read. Markdown: https://dahalutsab.com.np/dispatches/building-scalable-rest-apis-spring-boot.md - **[Implementing JWT Authentication in Spring Security](https://dahalutsab.com.np/dispatches/jwt-authentication-spring-security)** — Step-by-step implementation of JWT-based authentication and authorization in Spring Boot applications, including refresh token handling and security best practices. Filed 10 January 2024 under Spring Boot. 12 min read. Markdown: https://dahalutsab.com.np/dispatches/jwt-authentication-spring-security.md - **[Database Optimization Techniques for Spring Data JPA](https://dahalutsab.com.np/dispatches/database-optimization-spring-data-jpa)** — Advanced techniques for optimizing database queries in Spring Data JPA applications, including lazy loading, query optimization, and performance monitoring. Filed 5 January 2024 under Database. 10 min read. Markdown: https://dahalutsab.com.np/dispatches/database-optimization-spring-data-jpa.md - **[Introduction to Microservices Architecture](https://dahalutsab.com.np/dispatches/introduction-microservices-architecture)** — Learn the fundamentals of microservices architecture and how to implement scalable, resilient systems using Spring Boot, Docker, and Kubernetes. Filed 1 January 2024 under Microservices. 15 min read. Markdown: https://dahalutsab.com.np/dispatches/introduction-microservices-architecture.md - **[Event-Driven Architecture with Apache Kafka](https://dahalutsab.com.np/dispatches/event-driven-architecture-apache-kafka)** — Learn how to implement event-driven architecture using Apache Kafka and Spring Boot, with practical examples for building scalable, resilient systems. Filed 28 December 2023 under System Design. 14 min read. Markdown: https://dahalutsab.com.np/dispatches/event-driven-architecture-apache-kafka.md - **[Containerizing Spring Boot Applications with Docker](https://dahalutsab.com.np/dispatches/containerizing-spring-boot-docker)** — Complete guide to containerizing Spring Boot applications using Docker, including multi-stage builds, Docker Compose, Kubernetes deployment, and DevOps best practices. Filed 25 December 2023 under DevOps. 11 min read. Markdown: https://dahalutsab.com.np/dispatches/containerizing-spring-boot-docker.md ### Filed for later - Sending Emails with JavaMailSender in Spring Boot - Integrating Swagger/OpenAPI for API Documentation - Global Exception Handling with @ControllerAdvice - Spring Boot File Upload and Download - JWT Authentication and Authorization - Connecting Spring Boot to MySQL/PostgreSQL - Scheduling Tasks with @Scheduled in Spring - Using Lombok to Reduce Boilerplate Code - Handling Validation with @Valid and BindingResult ## Contact Write to info@dahalutsab.com.np. Working hours are Sun–Fri, 9AM–6PM NPT (Nepal time, UTC+05:45), and the contact form on the front page reaches the same desk. --- Source: https://dahalutsab.com.np/ From The Utsab Dahal Times — the record of Utsab Dahal, Backend Developer — Spring Boot & DevOps, Kathmandu, Nepal. Full record: https://dahalutsab.com.np/llms-full.txt