Java Developer

Context for the Candidates:

Blockchain engineers are tasked with building secure, scalable, and high-performance decentralized applications. This discussion focuses on how to utilize key technologies—Node.js, Rust, Go, TypeScript, Ethers.js, viem, and Hardhat—in smart contract and blockchain system development, while addressing the practical challenges that arise in such projects.

Key Discussion Points:

• How do you integrate Node.js, Rust, Go, and TypeScript in blockchain-backed applications?

• Discuss the trade-offs between using Rust or Go for performance-critical blockchain services.

• What are the key challenges in ensuring the security and scalability of smart contracts using tools like Ethers.js, viem, and Hardhat?

• How do you approach testing, debugging, and deploying smart contracts in a decentralized environment?

• Share best practices for gas optimization, contract upgradability, and backend scalability.

Evaluation Criteria:

1. Technical Knowledge:

• Strong knowledge of Node.js, Rust, Go, and TypeScript with practical experience in blockchain development.

• Proficiency in Ethers.js, viem, Hardhat, and smart contract lifecycle (development, testing, deployment).

• Understanding of security best practices, performance optimizations, and scalability in decentralized systems.

2. Problem-Solving and Integration Skills:

• How candidates approach integrating smart contract solutions with backend services using Node.js, Rust, Go, and TypeScript.

• Solutions proposed for common challenges in blockchain projects such as gas fees, security vulnerabilities, and system bottlenecks.

3. Experience and Expertise:

• Minimum of 2 years of IT experience, including hands-on development with the specified technologies.

• Practical knowledge of blockchain architecture, consensus mechanisms, and decentralized application deployment.

4. Innovation and Critical Thinking:

• Candidates’ ability to think creatively about system architecture, proposing scalable and secure solutions for blockchain-based applications.

• Discussion on the future potential of blockchain technology and how the tech stack can evolve.

5. Communication and Team Collaboration:

• Clear articulation of technical challenges and how to address them in a team setting.

• Ability to lead or contribute to discussions in a way that encourages collaboration and team-driven problem-solving.

7+ years of experience with Design, development & architecture.

• Experience in software development with minimum 3 plus years of architecture experience.
• Experience in Core JAVA 8
• Experience in Java J2EE, Microservices
• Experience in Java - Spring, Java - SpringBoot, GCP , Hibernate,JDBC
• Experience in Multi-threading, Performance and Scaling is a plus
• Have used the RDBMS and NoSQL databases like MySQL/Oracle, MongoDB, Cassandra, Neo4J Risk for production ready software’s
• Cloud Native application design experience is a plus
• CICD – Release Pipeline experience
• Experience in application of principles of Architecture Design
• Experience building large scale, high performance distributed systems
• Strong understanding of modern development techniques and processes such as Dev Ops /Cloud
• Promoter of Agile/Scrum, TDD and CI/CD best practices
• Analyzes, designs, programs, debugs and modifies software enhancements and/or new products used in local, networked or Internet-related computer programs. (Code must be used in core version of applications available for sale commercially.)
• Interacts with Delivery managers and/or users to define system requirements and/or necessary modifications.
• Participates in software design meetings and analyzes user needs to determine technical requirements.
• Write technical specifications based on conceptual design and stated business requirements.
• Writes code, completes programming and performs testing and debugging of applications using current programming languages and technologies.
• Completes documentation and procedures for installation and maintenance.
• Trains and communicates with internal Client Training, Client Relationship and Sales teams on systems application.
• May be responsible for developing or executing project plans, budgets and schedules and for documenting work and results.
• May deliver informational and decision-seeking presentations to technical and business groups to internal and/or external audiences.

Requirements

• High self motivation to lead & build projects from beginning to end;
• You've shipped multiple products and are willing/able to demonstrate how you solved specific problems to solve users needs;
• Excellent communication in presenting your code and communicating what problems they are solving while giving/receiving feedback;
• Ability to quickly grasp goals and requirements from light specifications;
• Must be able to effectively & efficiently work with stakeholders spreads across many timezones;
• 5+ years of Android experience working in a modern commercial web development environment and shipping solid product;
• Experience in Springboot, Microservices, JPA, oracle database.
• Must have experience in authentication mechanism like LDAP, SSO, any authentication server, role management

Perks

• Ground floor opportunity with the team; shape the strategic direction of the company.
• Work with sharp, motivated and passionate co-workers spread across many regions.
• Rare opportunity to make real positive impact on the world!

• Complete experience in the Spring Framework
• proficient knowledge of SQL and NoSQL must
• Hands-on experience in designing and developing applications using Java EE platforms
• Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high availability and performance
• Contributing in all phases of the development lifecycle
• Writing well designed, testable, efficient code
• Excellent Communication Skills
• Willingness to own a responsibility
• Ability to work in a team as well as an individual
• Ability to work under pressure and maintain deadlines
• Good to have worked on end to end in projects

• Translation of complex functional requirements into technical requirements
• Design, develop and maintain complex systems using best of the breed development practices and technology.
• Responsible for the overall software development life cycle.
• Delivery of High Quality & Scalable systems and applications with a sharp focus on timelines.
• Being on the lookout for bettering the software engineering practices and tools within the organization
• Collaboration with other stakeholders to provide robust and well-rounded solutions
• Report on the status of product delivery and quality to management, customer support and product teams.

• Experience of 5+ years in designing & developing highly scalable, performant web applications
• Strong programming, debugging, and problem-solving skills
• Strong Computer Science Fundamentals (Data structures and Algorithms)
• Sound understanding of object-oriented programming and excellent software design skills.
• Good experience of Restful services using Java Springboot
• Strong understanding of database design and SQL (PostgreSQL / MySQL) development
• Good to have knowledge of NoSQL technologies like Redis, MongoDB, Cassandra or any other NoSQL database
• Knowledge of design patterns and good to have experience of large-scale applications
• Should have experience in Apache Kafka, RabbitMQ, SQS or other Queueing systems.
• Experience of working with Amazon Web Services (AWS), Google Cloud Computing (GCP) would be considered as an advantage
• Experience of developing with Serverless Model will be an advantage.

As a Software Engineer at Quince, you'll be responsible for designing and building scalable infrastructure and build applications to solve some very interesting problems in the logistics and finance tech space.

Responsibilities:

• Design and architect solutions on the cloud for various business problems with workflow efficiency and scale in mind.
• Be on the forefront with the business team to learn, understand, identify and translate function requirements into technical opportunities.
• End-to-end ownership - from scoping the requirements to the final delivery of the solution with keen eye to details and quality.
• Build and improve logistics components for this innovative M2C supply-chain model.
• Build and maintain scalable ETL data pipelines.

Requirements:

• Bachelors/Masters/PhD in Computer Science or closely related subject.
• 1-5 years of experience in building software solutions.
• Good at data structures and their practical applications.
• Proficiency in Kotlin, Java, Python.
• Experience in deploying and maintaining applications on cloud platforms (Ex: AWS, Google cloud).
• Proficiency with SQL and databases - relational and/or nosql (Snowflakes, AWS RedShift, etc).
• Experience with messaging middleware such as Kafka is good to have.

• You will design, build and own APIs and Services, which will be the core of the product.
• You will participate in continuing education and training to remain current on best practices, learn new programming languages, and better assist other team members.
• You will part of developing ideas for new programs, products, or features by monitoring industry developments and trends.
• You will have to take lead on projects, compile and analyze data, processes, and codes to troubleshoot problems and identify areas of improvement.

REQUIREMENTS

• 3-5 years of experience in building highly scalable backend systems.
• Fluency or understanding of specific languages, such as JAVA, Operating System may be required, and Experience in Databases such as MySQL or Postgre SQL
• Strong understanding of Computer Science Fundamentals, Data Structures and Algorithms, SOLID Design Principles, and REST Patterns.
• Focus on efficiency, user experience, and process improvement.
• Excellent project and time management skills.
• Strong problem-solving and communication skills.
• Ability to work independently or with a group