FiftyFive Technologies Pvt Ltd

Job Overview:

We are looking for a Full-Stack Developer with 4+ years of experience in software development. The ideal candidate will be proficient in both frontend and backend technologies, capable of building scalable and high-performance applications, and have a problem-solving mindset. You will collaborate with cross-functional teams to develop, optimize, and maintain web applications.

Key Responsibilities :

- Design, develop, and maintain web applications ensuring performance and scalability.  

- Work with backend services using Node.js (Express.js/NestJS) and databases.  

- Develop and maintain frontend applications using React.js (minimum 1 year experience required).  

- Integrate APIs (RESTful & GraphQL) and third-party services.  

- Write clean, maintainable, and efficient code following industry best practices.  

- Ensure security, reliability, and optimization in applications.  

- Participate in debugging, troubleshooting, and performance tuning.  

- Work closely with designers, product managers, and engineers to deliver high-quality solutions.  

- Stay updated with modern development trends and contribute to technical improvements.  

Required Skills & Qualifications :  

- 4+ years of experience in full-stack development.  

- Strong proficiency in JavaScript and TypeScript.  

- Hands-on experience with Node.js (Express.js/NestJS).  

- Minimum 1 year of experience working with React.js.  

- Experience with SQL (PostgreSQL, MySQL) and NoSQL (MongoDB) databases.  

- Proficiency in API design, development, and integration (RESTful, GraphQL).  

- Familiarity with version control tools (Git, GitHub/GitLab/Bitbucket).  

- Strong problem-solving and analytical skills.  

- Ability to work both independently and collaboratively in a team.  

Good to Have : 

- Experience with Cloud Services (AWS, Azure, or GCP).  

- Familiarity with Containerization (Docker, Kubernetes).  

- Knowledge of testing frameworks (Jest, Mocha, or Cypress).  

- Understanding of event-driven architectures and message queues (Kafka, RabbitMQ).

Job Description:

We are looking for a skilled Java Developer with 4+ years of experience. The ideal candidate should have hands-on experience in building scalable and high-performance applications using modern Java frameworks and cloud-based deployments. You will work with cutting-edge technologies, including microservices, reactive programming, and containerized deployments, to develop robust and efficient solutions.

Key Responsibilities:

• Develop, enhance, and maintain applications using Java, Spring, and Spring Boot.

• Implement authentication and authorization mechanisms using Keycloak.

• Design and develop scalable microservices with efficient communication using HTTP and gRPC.

• Utilize WebFlux and reactive programming principles to build non-blocking applications.

• Integrate and work with RabbitMQ for messaging and event-driven architecture.

• Work with PostgreSQL, ensuring optimized queries and database performance.

• Deploy applications on Google Cloud Platform (GCP), leveraging cloud-native services.

• Utilize Docker and containerization techniques for efficient application deployment.

• Implement unit testing and ensure code quality through best practices.

• Collaborate with cross-functional teams to design and develop robust solutions.

• Use Git for version control and participate in code reviews.

• Work with GoLang where needed for microservice or backend functionalities.

Required Skills:

• Strong experience with Java, Spring, and Spring Boot.

• Good understanding of Keycloak for authentication and authorization.

• Experience with HTTP, gRPC, and microservices architecture.

• Hands-on knowledge of WebFlux and reactive programming.

• Experience working with RabbitMQ for message brokering.

• Proficiency in PostgreSQL and writing efficient SQL queries.

• Familiarity with GCP deployment and cloud-native development.

• Experience with Git, Docker, and containerization.

• Strong understanding of unit testing frameworks like JUnit, Mockito, etc.

• Ability to work with GoLang when required.

Nice to Have:

• Experience with Kubernetes for container orchestration.

• Exposure to CI/CD pipelines and DevOps practices.

• Knowledge of security best practices in cloud-based applications.

We're Hiring: Machine Learning Engineer

Location: Jaipur/Indore/Gurgaon

Job Type: Full-time

Experience: Mid-Senior (4+ years in ML, 1+ year with LLMs)

We’re looking for a Machine Learning Engineer / Data Scientist with expertise in ML, NLP, and Large Language Models (LLMs). The ideal candidate will have 4+ years of ML/NLP experience and at least 1 year of hands-on experience with LLMs (fine-tuning, RAG, AI-driven agents).

Key Responsibilities:

Fine-tune and optimize LLMs (GPT, LLaMA, Mistral, etc.)

Develop AI agents using CrewAI, LangChain, AutoGPT

Build and enhance RAG pipelines with FAISS, Pinecone, Weaviate

Work on NLP models (text classification, summarization, NER, etc.)

Stay updated with the latest in LLM advancements

Skills & Qualifications:

✅ 4+ years in ML/NLP, 1+ year in LLMs

✅ Proficient in Python, PyTorch, TensorFlow

✅ Experience with LLM fine-tuning (LoRA, PEFT, QLoRA)

✅ Hands-on with AI agents and RAG tools

Good-to-Have:

🔹 Multi-modal AI (text-to-image, speech-to-text)

🔹 Knowledge of contrastive learning, RLHF

🔹 Open-source contributions or AI publications