Java Developer for Microservice — ITR & AIS

@rohitpatidar001

As a seasoned Java developer with over 9 years of experience, I am confident in my abilities to deliver your desired project. My strong suit lies in delivering efficient, scalable, and secure microservices using the Spring Boot framework. Throughout my career, I have designed and implemented highly reliable distributed systems that are decoupled, emphasize fault isolation, and employ robust retry mechanisms - essential skills demanded by your project. Moreover, I bring extensive experience with integrating RESTful APIs into Java/Spring frameworks. Specifically, API integrations with government portals have been part of my work portfolio before and I am comfortable navigating through the portal's MFA/OTP functionalities as well as other potential bottlenecks such as CAPTCHA. Lastly, it's also worth mentioning that I am well-versed in working with Redis for encrypted session/token caching as requested. My proficiency with Docker and Kubernetes ensures seamless deployment while Helm Charts can provide a simpler configuration management system. I believe my expertise combined with my ease at employing resilience techniques like circuit breakers, retries, rate limiting etc. would be invaluable to your team.

@vishal1145

Your TRACES 2.0 migration will fail if you don't handle the new session token format that changed in April 2026. The old Python script you're using likely targets the legacy portal structure, which means your Redis cache strategy needs to support dual-format tokens during the transition period or you'll face authentication failures mid-session. Before architecting the solution, I need clarity on two things: What's your current OTP relay mechanism - are you using SMS webhooks or manual input via a separate UI? And what's your expected concurrent PAN processing load - 10 requests per minute or 100? This determines whether I implement a simple rate limiter or a distributed queue with Redis Streams. Here's the architectural approach: - SPRING BOOT 3.x + JAVA 21: Build a stateless microservice using virtual threads for blocking I/O operations during portal scraping, reducing thread pool overhead by 70% compared to traditional thread-per-request models. - REDIS 7 + AES-256: Implement encrypted session caching with automatic TTL refresh based on portal token expiry headers, preventing mid-fetch authentication drops that corrupt AIS data. - RESILIENCE4J: Configure circuit breakers with fallback to ERI API when TRACES portal returns 503 errors during peak filing season (typically July-August), ensuring 99.5% uptime. - KUBERNETES + HELM: Package with horizontal pod autoscaling triggered by Redis queue depth, not CPU usage, since portal scraping is I/O-bound and CPU metrics give false scaling signals. - WIREMOCK + TESTCONTAINERS: Mock both old and new TRACES response formats in integration tests to validate backward compatibility during the portal migration window. I've built 3 similar government portal integrations including GST and PF automation systems that handled 50K daily sessions without storing credentials. I don't take on projects where the OTP relay mechanism isn't clearly defined upfront - let's schedule a 20-minute technical call to walk through the Python script and discuss edge cases like CAPTCHA triggers before I commit to the 4-week timeline.

@belotefreelancer

"I have gone through your description. I will guide you how to step-by-step build web applications using Java I'm a full-stack developer to take charge of backend, frontend, and deployment: database design, business logic, REST API, interface in React/Vue or equivalent technology, and implementation on a cloud provider with CI/CD pipelines "This is my area of specialization, i can get it done 100 % perfectly well. Please ping me in person. I can help you to complete all tasks. I have hands-on experience in this field. We have already done similar types of projects. Connect with us for more details. Rest assured your satisfaction is guaranteed." Looking forward to your response." Thank you for your time and I am confident that we will be a great fit for this project. Best,

@KarthikTechCon

Hi, I’m Karthik with 15+ years of experience in Java/Spring microservices, secure integrations and enterprise backend architecture, and this aligns very well with my expertise. I can build your Java 21 + Spring Boot 3 microservice for ITR login, AIS/26AS fetch, session automation and secure API exposure with scalability and compliance in mind. ✔ Spring Boot microservices for login, OTP relay, AIS/26AS fetch & PDF endpoints ✔ Python login script adaptation into Java-based session automation flow ✔ Redis encrypted token/session caching with TTL + refresh handling ✔ Resilience4j (retry, circuit breaker, rate limiting) ✔ JWT security, structured APIs, OpenAPI/Swagger ✔ Docker + Kubernetes (Helm), Prometheus/OpenTelemetry observability ✔ WireMock/Testcontainers integration testing with strong coverage ✔ Compliance-aware stateless/pass-through architecture (no credential/data persistence) Strong experience in secure API integrations, session-driven automation, distributed systems, Spring Security, K8s and high-availability backend services. I can also address CAPTCHA/MFA risks, throttling and TRACES response adaptability. Approach: architecture & risk review → MVP endpoints → session/token automation → observability/testing → containerized deployment. Can deliver production-ready code, GitHub repo, Helm charts, documentation and test suite. Happy to discuss your Python script and TRACES 2.0 specifics and start immediately. Warm Regards, Karthik B Resonite Tech

@Srashtasoft

Hi there, I have read your project requirement. You need a scalable Java Spring Boot microservice that automates login to the Income Tax e-Filing portal, handles OTP/MFA, fetches AIS and Form 26AS data from TRACES, and exposes secure JWT-based REST APIs with full observability and Kubernetes-ready deployment. We can build a production-grade microservice using Java 21 + Spring Boot 3.x with Redis (AES-256 encrypted caching), Resilience4j for fault tolerance, and secure session automation based on your existing Python script. The solution will include OTP relay handling, token lifecycle management, TRACES 2.0 compatibility, structured logging, OpenTelemetry tracing, Prometheus metrics, and a complete Docker + Helm deployment setup. We will also ensure strict compliance (no credential/data storage) and deliver full test coverage with WireMock/Testcontainers. A few questions to clarify before proceeding: ==================================== Will the provided Python script be used as a reference only, or do you want it integrated via a hybrid approach initially? Do you have access to ERI APIs as fallback, or should we design the system purely on portal automation? What is the expected request volume (PAN/day) to tune rate limiting and scaling strategy? Should OTP relay be manual (user-provided) or integrated via SMS/email gateway APIs? Best Regards, Srashtasoft Team

@harfarooqi

Hi I have 8+ years experience in developing production ready java application at enterprise level. I can do this task efficiently. Best

@borse1012

I can design and build a secure, scalable Java 21 + Spring Boot microservice to automate ITR portal login, session handling, and AIS/26AS data retrieval—aligned with your architecture and compliance requirements. Relevant Experience I have strong hands-on experience in: Java 17/21, Spring Boot 3, Microservices architecture Secure API development (JWT, Spring Security) Session-based automation & HTTP integrations Redis caching, Resilience4j, and distributed systems AWS/Kubernetes deployments with observability (OpenTelemetry, Prometheus) I’ve worked on systems involving secure data handling, external portal integrations, and token/session lifecycle management, which aligns closely with this requirement. Proposed Approach Integrate your existing Python login flow and convert/extend into Java service Build session/token manager with Redis (AES-256 + TTL) Implement OTP/MFA relay endpoint (async-safe) Develop AIS & 26AS fetchers supporting TRACES 2.0 + fallback handling Add Resilience4j (retry, circuit breaker, rate limiting per PAN) Secure APIs with JWT + structured responses Ensure no sensitive data persistence (compliance-ready) Timeline 4–6 weeks (MVP) as per scope Happy to discuss TRACES specifics, CAPTCHA strategies, and architecture before starting.

@Cmonosoft

Hi there, I have experience building secure API systems with Spring Boot, Redis, and resilient architectures. I can develop the service using Java 21 and Spring Boot 3 with a clean modular structure. The login flow will integrate your existing Python script logic, followed by secure session token extraction and management using Redis with encrypted, TTL-based storage. All required REST endpoints will be built with proper validation, structured JSON responses, and JWT-based security. I will implement Resilience4j for circuit breaking, retries, and rate limiting to handle portal instability and throttling risks. I will design adaptable parsers to support TRACES 2.0 and fallback handling. The system will remain stateless with no sensitive data persistence, aligning with compliance requirements. Let's connect to discuss and start work! Thanks Saurabh

@abhayk49

Hi, I’m a Java backend developer with strong experience in Spring Boot microservices, secure integrations, and session-based API automation. I’ve worked on OTP flows, token handling, and high-reliability backend systems, which aligns well with this project. ✅ Relevant Expertise ✅ Java 21 & Spring Boot 3.x ✅ Spring Security & JWT ✅ Redis (TTL-based caching, secure session handling) ✅ Resilience4j (retry, circuit breaker, rate limiting) ✅ REST API design & OpenAPI/Swagger ✅ Docker, Kubernetes & Helm ✅ JUnit, Mockito, WireMock, Testcontainers ✅ Logging, metrics (Micrometer, Prometheus) ? How I Can Help • Implement secure login flow with OTP/MFA relay and session token extraction • Build REST APIs for AIS & 26AS fetch (JSON + PDF) • Manage Redis-based encrypted session caching with auto refresh • Handle resilience (retry, throttling, fallback strategies) • Ensure stateless, scalable microservice (Docker + K8s ready) • Add observability (logs, tracing, metrics) and 80%+ test coverage ✔ Deliverables ✔ Complete Spring Boot microservice (production-ready) ✔ Redis integration + secure session handling ✔ Docker image + Helm chart ✔ Swagger documentation ✔ Full test suite + README I understand the sensitivity of government integrations, OTP handling, and compliance requirements, and will ensure a secure, clean implementation. Ready to review your Python script and start with the MVP. Best regards, Abhay

@rbtech1984

Hello There!!! ★★★★ ( Java Spring Boot microservice for ITR login, AIS/26AS fetch with secure scalable architecture ) ★★★★ I understand you need a backend microservice to automate ITR portal login, handle OTP/MFA, fetch AIS & 26AS data, and expose via secure REST APIs. It should be scalable, token-managed, and compliant. ⚜ Spring Boot microservice dev (Java 21) ⚜ Session handling + Redis caching ⚜ AIS & 26AS data extraction ⚜ JWT-secured REST APIs ⚜ Resilience4j (retry, circuit breaker) ⚜ Docker + Kubernetes setup ⚜ Testing (JUnit, WireMock) I have expereince with secure API systems, session-based automation and gov portal integrations. Worked on similar token/session workflows with reliability focus. I’ll integrate your Python login script, build robust token flow, and ensure observability with logs & metrics. Would be glad to discuss and start. Warm Regards, Farhin B.

@modesorehari6

Hello, I can build your Java Spring Boot microservice for ITR login, AIS, and 26AS extraction with a strong focus on reliability, security, and scalability. **Relevant experience:** I’ve worked on session-based automation systems and secure API services involving OTP flows, token handling, and scraping protected portals. I’m comfortable adapting your existing Python login script into a robust Java-based workflow. **Technical approach:** • Java 21 + Spring Boot 3.x (clean, modular microservice) • Redis (AES-256 encrypted, TTL-based session/token caching) • Resilience4j (retry, circuit breaker, rate limiting) • JWT-secured REST APIs • OpenTelemetry + Prometheus for observability • Dockerized + Kubernetes-ready (Helm chart included) **Core implementation:** • Automated login + session token extraction • OTP/MFA relay endpoint handling async flow • AIS & 26AS fetch (TRACES 2.0 compatible) • PDF download support • Token validation + refresh endpoints **Quality & compliance:** • No credential storage, pass-through architecture • Structured logging (no sensitive data) • 80%+ test coverage (JUnit, WireMock, Testcontainers) • DPDP Act & IT Act aligned design **Deliverables:** Full source code, Docker image, Helm chart, Swagger docs, and complete test suite with setup guide. **Timeline:** 4–5 weeks **Budget:** ₹32,000 INR I can ensure a stable, production-ready microservice that handles edge cases like OTP delays, session expiry, and portal changes. Ready to start immediately.

@GobindSawarn

Hi, This is a serious enterprise microservice + session automation project, and I can contribute strongly on both the Spring Boot architecture and the portal integration side. Since you already have a Python login script, I’d leverage that logic while building a robust Java 21 microservice around it. How I’d approach it: Core Microservice (Java 21 + Spring Boot 3) • Build modular Spring Boot service with JWT-secured REST APIs • Redis TTL-managed encrypted session/token handling • Resilience4j for retry, circuit breaker and rate limiting • Structured logging, metrics, OpenTelemetry instrumentation Portal Session Automation • Integrate login/session flow using provided Python logic as reference • OTP/MFA relay endpoint handling • Auto token/session refresh strategy • AIS + 26AS fetch endpoints (including PDF flow) • Support response normalization for TRACES variations Risk/Compliance Focus ✔ No credential persistence ✔ Pass-through data handling only ✔ Compliance-aware implementation ✔ Throttling and fallback-aware design I have experience with Spring Boot microservices, secure API design, session-based automation and distributed systems patterns, and I’d approach this as a scalable production service, not just a scraper wrapper. ⏱ Timeline: 4–6 weeks aligns for MVP. Happy to discuss architecture and portal integration details further. ?

@sonika1419

**DO NOT PAY ME UNTIL I COMPLETE! :)** Hello my valuable client :) My profile is new over here but I have 7 years of experience in this field. I have completely understood about your project. Also I will provide you free maintenance on your project for 1 year after project completion. I can definitely complete this in your timeframe. Give me one chance to prove myself. Hit the chat button to get started. If you will not like my work then you dont need to pay me any money so dont worry and have faith in me :) I am eagerly waiting for your message.

@mwendapeter

Hi there, I’ve reviewed the requirements for this ITR/TRACES microservice. While I haven't personally interfaced with Indian Government portals, I am a Senior Software Engineer specializing in high-stakes, session-heavy microservice architecture. How I will ensure success: • Session Bridge: I will integrate your Python logic into a high-performance Java 21 environment. I will use Virtual Threads to ensure the service handles hundreds of concurrent fetches without breaking a sweat. • Resilience First: Government portals are often flaky. I will implement Resilience4j circuit breakers and retries so the system stays responsive even when TRACES 2.0 is slow or degrading. • Security: I will ensure Redis handles AES-256 encrypted session tokens with strict TTLs. No PII will touch logs or persistent storage, keeping us fully aligned with DPDP requirements. • Observability: I will set up OpenTelemetry and Prometheus from day one to track exactly where a fetch fails, whether it is a portal timeout or a bad OTP. Why Me? • Expert: My daily work involves Kubernetes, Docker, and Spring Boot, building distributed systems with 99.9% uptime. • Testing: You will get a full suite using WireMock and Testcontainers, ensuring the 80% coverage requirement is met with quality tests. If you want a robust, secure engine that won't need a rewrite in six months, let’s talk. Best regards, Peter Mwenda

@Visharaa2024

With almost a decade of experience as a software engineer, I am confident in my ability to fulfill all the requirements on your project checklist. My expertise in Java and Spring Boot, combined with my knowledge of Redis for encrypted session caching and experience integrating RESTful services, make me uniquely qualified for this project. I'm skilled in handling complex API interactions and automating session-based HTTP requests, perfect for your needs. Moreover, my familiarity with Docker and Kubernetes ensures not only quick deployment but also scalability for your service. Having worked extensively with JWT security, I can guarantee the confidentiality of your data throughout the processes involved. Additionally, I am fully equipped in resilience4j, WireMock integration, structured logging, OpenTelemetry tracing, Prometheus metrics - everything you need to ensure a streamlined microservice solution. Lastly, though not directly mentioned in your fortes-to-meet list, my experience incorporating web scraping and my commitment to staying up-to-date with the latest programming practices make me adept at handling any changes that may arise during the TRACES 2.0 migration. Rest assured that I will maintain full compliance with DPDP Act 2023 and IT Act 2000 while meeting your unique project specifications. Let's work together to create an efficient and secure solution for Indian taxpayers!

@Vinay7758

With my extensive experience in backend development using Java and Spring Boot, I am well-equipped to take on your project. Your project requires a strong understanding of Java and familiarity with the latest Spring Boot version, as well as knowledge of the Redis, Resilience4j and JWT technologies, which are some of my core specialties. Rest assured, I bring an in-depth understanding of these essential technological tools and have successfully integrated them into multiple web applications. Additionally, my previous work with Redis and JWT demonstrates my ability to expertly handle your project's encrypted session/token caching requirements for the Income Tax portal. Moreover, my experience with developing secure REST APIs ensures that your data remains confidential as we extract essential information from sources like AIS and Form 26AS via the TRACES portal. Lastly, I want to emphasize that my approach is not just about writing code but delivering solutions that are scalable and efficient for long-term use. I guarantee top performance (including auto token refresh), structured logging for maintenance clarity, use of WireMock tool for integration tests plus a high unit test coverage among other optimal practices. My work style is centered on optimized architecture and delivering stable, production-ready solutions rather than quick fixes. Let me bring this reliability and scalability to this project with impact!

@bondoc0526

꧁ ༺ Dear client ༻ ꧂ I can help you build a Java Spring Boot microservice. This microservice will securely automate login to the Income Tax portal. It will also manage session tokens. Fetch AIS and Form 26AS data. I will design the system to be scalable and ready for production. Here is how I plan to do it: * I will use Java 21 and Spring Boot 3 to structure the system. * I will use Redis for encrypted session caching. This caching will have a time to live (TTL) to manage it. * I will handle requests in a way using Resilience4j. * I will secure REST APIs with JWT. The service will have features: * It will support OTP and MFA relay. * It will automatically refresh tokens. * It will integrate seamlessly with TRACES 2.0. * It will handle edge cases like rate limiting and session expiration. For deployment I will: * Dockerize the service. * Make it ready for Kubernetes with Helm charts. * Ensure observability using OpenTelemetry and Prometheus metrics. I will also write unit and integration tests. I have done work before. If you are interested I can show you examples in chat. Given the chance to work on your project I am confident I will complete it on time and, within budget. Thanks.

@aravinthv7

Hi, I will build your Java Spring Boot microservice for ITR portal login automation and AIS/26AS data fetching with a secure, scalable backend architecture. Core Solution: Authentication: Programmatic login to Income Tax portal with session handling and OTP/MFA relay support. Session token extraction with secure refresh mechanism. Data APIs: REST APIs to fetch AIS data, Form 26AS (JSON + PDF), and session status using PAN + AY/FY inputs. Security & Session: Redis-based encrypted session storage with TTL, JWT-secured APIs, and controlled session lifecycle management. Reliability: Resilience4j for retry, circuit breaker, and rate limiting to handle portal instability and request failures. Observability: Structured logging, Prometheus metrics, and OpenTelemetry tracing for monitoring and debugging. Tech Stack: Java 21, Spring Boot 3.x, Redis, Spring Security, JWT, Resilience4j, Docker. Testing: JUnit 5, Mockito, WireMock for integration testing with strong coverage. Deployment: Docker-ready microservice with Kubernetes (Helm) support and clean CI/CD structure. Deliverables: Source code, Docker image, Swagger API docs, test suite, and deployment guide. Compliance: No sensitive data storage, secure pass-through design, DPDP Act compliant. Timeline: 4–6 weeks Budget: ₹26,000 within your range Milestones: 1. Login + session + OTP flow 2. AIS + 26AS API integration 3. Security + deployment + final testing Ready to start immediately after award.

@jagratip3

Dear Hiring Manager, I can build a secure, scalable Spring Boot microservice to automate ITR portal login and fetch AIS/26AS data, aligned with compliance and performance requirements. Approach: Develop using Java 21 + Spring Boot 3.x with a clean layered architecture. Integrate your existing Python login logic into a Java-compatible service flow (via API bridge or refactor). Implement session handling with Redis (AES-256 encrypted, TTL-based) and auto-refresh mechanisms. Handle OTP/MFA via async relay endpoints with secure token exchange. Use Resilience4j for retries, circuit breaking, and rate limiting to manage portal instability. Ensure no credential/data persistence; pass-through processing only. Key Features: JWT-secured REST APIs for login, AIS, 26AS (JSON/PDF), and session control TRACES 2.0 compatibility with fallback handling for format changes Structured logging, OpenTelemetry tracing, and Prometheus metrics CAPTCHA risk mitigation via throttling + fallback strategy Full test suite (JUnit, Mockito, WireMock, Testcontainers) with 80%+ coverage Classification: Backend Architecture: Microservice, secure session orchestration Security & Compliance: JWT, encryption, DPDP & IT Act adherence Resilience: Fault tolerance, retry, rate limiting DevOps: Dockerized, Kubernetes-ready with Helm Observability: Metrics, logs, tracing You’ll receive complete source code, Docker image, Helm chart, API docs, and deployment guide. Best Regards, JP