BLOCK-HIRE
PROJECT REPORT
18CSE427T -Blockchain Architecture and Programming Smart Contracts
Submitted by
GAIRIK SHANDILYA [RA2111050010054]
HARDIK GUPTA [RA2111050010053]
Under the guidance of
K. Shantha Kumari
Associate Professor, Department of Data Science and Business Systems
Mentored by
Prof. Raghava Rao Mukkamala
Director, Center for Digitization
Copenhagen Business School, Denmark
in partial fulfillment for the Professional Elective 18CSE427T as part of the degree
BACHELOR OF TECHNOLOGY
in
COMPUTER SCIENCE & ENGINEERING
specialization in
BLOCKCHAIN TECHNOLOGY
S.R.M. Nagar, Kattankulathur, Chengalpattu District
MAY 2024
SRM INSTITUTE OF SCIENCE AND TECHNOLOGY
(Under Section 3 of UGC Act, 1956)
BONAFIDE CERTIFICATE
Certified that Project report titled “BLOCK-HIRE” is the bona fide work of
GAIRIK
SHANDILYA
(RA2111050010054)
and
HARDIK
GUPTA
(RA2111050010053) who carried out the Professional Elective -18CSE427 Blockchain Architecture and Programming Smart Contracts project under my
supervision. Certified further, that to the best of my knowledge, the work reported
herein is the effort of the student that forms a solid foundation for professional
development in smart contracts programming with respect to Indian scenarios.
K. Shantha Kumari
Dr. M. Lakshmi
Faculty in charge
Professor & Head
Associate Professor
Data Science and Business Systems
Data Science and Business Systems
ABSTRACT
The report presents BlockHire, a pioneering decentralized recruitment platform
that harnesses blockchain technology to revolutionize the traditional hiring process.
BlockHire offers a secure, transparent, and efficient solution for connecting
companies with talented candidates worldwide. By leveraging the immutability and
automation capabilities of blockchain, BlockHire ensures transparency in job
postings, applications, and hiring decisions, while also safeguarding data privacy
and authenticity verification. The platform features rewarded job listings,
comprehensive candidate profiles, and skill endorsements, enhancing the
recruitment experience for both employers and job seekers. Additionally,
BlockHire explores potential future features such as anonymous job reviews and
secure certificate generation to further elevate its functionality and user
satisfaction. Through this report, readers will gain insights into the objectives,
workflow, benefits, and future prospects of BlockHire, contributing to the
advancement of decentralized recruitment in the digital era.
As BlockHire continues to evolve, potential future features such as anonymous job
reviews and secure certificate generation promise to further enhance the platform's
functionality and user experience. This report provides a comprehensive overview
of BlockHire's objectives, workflow, benefits, and future prospects, offering
valuable insights into the forefront of decentralized recruitment in today's digital
landscape.
TABLE OF CONTENTS
Chapter No.
Chapter Title
Page Number
Abstract
iii
List of Figures
v
List of Tables
vi
Abbreviations
vii
1
Introduction
viii
2
Related works and Background
ix - x
3
Proposed Work & Methodology
xi
4
Technical Implementation – Requirements
& Workflow
xii - xiv
5
Comparative analysis of Related works and
Proposed solution
xv - xvi
6
Results and Discussion
xvii - xviii
7
Conclusion & Future enhancements
xix - xx
8
References
xxi
Appendix 1 – Screenshots
xxii - xxiii
Appendix 2 – Code snippets
xxiv - xvi
Appendix 3 – Manual to use the application
xvii
LIST OF FIGURES
S. No.
Title
Page Number
CHAPTER 4.4
Architecture
xiv
APPENDIX 1
Screenshots
xxii - xxiii
APPENDIX 2
Code Snippets
xxiv - xvi
LIST OF TABLES
Chapter No.
5
6
Table Heading
Comparative analysis of Related works
Results / Outcomes
Page
Number
xv - xvi
xvii - xviii
ABBREVIATIONS
Abbreviation
Full Form
P2P
Peer-to-Peer
UI
User Interface
API
Application Programming Interface
IDE
Integrated Development Environment
DLT
Distributed Ledger Technology
PoC
Proof of Concept
CHAPTER 1
INTRODUCTION
BlockHire emerges as a groundbreaking solution in the realm of recruitment,
spearheading a transformative shift towards decentralized, transparent, and
efficient practices. Our platform's core mission revolves around fostering a
dynamic ecosystem for peer-to-peer (P2P) job matching, underpinned by the
integration of Blockchain technology.
Objectives
BlockHire is driven by several key objectives:
1. Facilitating P2P Job Matching: Our platform enables direct job transactions
between employers and candidates, eliminating intermediaries and reducing
costs.
2. Promoting Fair Compensation: By offering rewarded job listings,
BlockHire ensures fair compensation for candidates and incentivizes talent
acquisition.
3. Enhancing Trust and Accountability: Smart contracts on the Blockchain
handle job listings, applications, and reward distribution, ensuring swift and
secure transactions with accountability.
4. Improving User Experience: Through intuitive UI/UX design, BlockHire
offers a seamless user experience, encouraging widespread adoption among
employers and candidates.
Significance of Blockchain Integration
The integration of Blockchain technology in the recruitment sector holds
immense significance:
1. Transparency and Accountability: Blockchain ensures transparent and
immutable records of job transactions, fostering trust and accountability.
2. Security: Decentralized Blockchain networks are inherently secure,
safeguarding sensitive job data and preventing unauthorized access.
3. Efficiency: Smart contracts automate various recruitment tasks, reducing
bureaucracy and streamlining the hiring process.
4. Global Accessibility: BlockHire's decentralized nature allows for global
access, opening up new opportunities for both employers and candidates
worldwide.
CHAPTER 2
RELATED WORKS AND BACKGROUND
The landscape of P2P job platforms and Blockchain applications in the
recruitment sector is vibrant and evolving. Understanding the context and
challenges faced by existing systems is crucial to appreciating the innovative
solutions offered by BlockHire.
Existing P2P Job Platforms
Several P2P job platforms have emerged globally, aiming to revolutionize
recruitment processes. Platforms like Upwork, Freelancer, and TaskRabbit
facilitate direct job matching between employers and freelancers, leveraging
digital technologies to create efficient, decentralized marketplaces. These
platforms have demonstrated the feasibility and potential of P2P job matching,
highlighting the demand for transparent and efficient job transactions.
Blockchain Applications in Recruitment
Blockchain technology has found widespread applications in the recruitment
sector, offering unique advantages such as transparency, security, and
automation. Smart contracts, a key feature of Blockchain, enable automated
execution of job transactions, eliminating the need for intermediaries and
streamlining processes. Additionally, Blockchain-based job platforms ensure
traceability of job listings and applications, promoting fairness and
accountability in the recruitment process.
Challenges Addressed by BlockHire
BlockHire addresses several challenges prevalent in traditional recruitment
systems:
1. Centralization: Traditional job markets are often centralized, leading to
inefficiencies, lack of transparency, and higher costs. BlockHire's decentralized
approach fosters a more equitable and efficient job matching ecosystem.
2. Intermediaries: Middlemen and intermediaries in job transactions can
complicate processes and increase costs. BlockHire's P2P model eliminates
intermediaries, enabling direct transactions between employers and candidates.
3. Trust and Transparency: Trust and transparency are paramount in job
transactions. BlockHire leverages Blockchain technology to create transparent,
immutable records of transactions, enhancing trust and accountability.
4. Fair Compensation: Ensuring fair compensation for candidates is essential.
BlockHire incentivizes fair compensation through rewarded job listings,
promoting a competitive and equitable job market.
By addressing these challenges and building upon the advancements in P2P job
platforms and Blockchain applications, BlockHire emerges as a pioneering
solution poised to revolutionize the recruitment sector. This section sets the
stage for a detailed exploration of BlockHire's design, methodology, and impact
in subsequent sections of the report.
CHAPTER 3
PROPOSED WORK AND METHODOLOGY
The development of BlockHire, a decentralized recruitment platform, is guided
by a strategic technical approach and methodology tailored to harness the power
of blockchain technology. This section outlines the key elements of our
approach and the methodology employed.
Technical Approach and Methodology
BlockHire's technical approach and methodology are characterized by the
following key elements:
1. Iterative Development: We embrace an iterative development approach,
allowing for continuous refinement and enhancement of the platform. This
iterative process enables us to adapt to evolving requirements, incorporate user
feedback, and ensure the platform's responsiveness to market needs.
2. Scalable Architecture: BlockHire is built upon a scalable architecture,
designed to accommodate growth and expansion over time. Our modular design
facilitates scalability, enabling seamless integration of new features and
functionalities as the platform evolves.
3. User-Centric Design: User experience (UX) and user interface (UI) design
are central to BlockHire's development philosophy. We prioritize usability,
intuitiveness, and accessibility, conducting user research and usability testing to
ensure that the platform meets the needs and preferences of our diverse user
base.
4. Security-Driven Development: Security is a top priority throughout the
development lifecycle. We employ rigorous security measures, including
encryption, authentication, and authorization protocols, to safeguard user data,
protect against cyber threats, and ensure the integrity of transactions on the
platform.
5. Blockchain Integration: The integration of blockchain technology is
fundamental to BlockHire's architecture. We leverage the immutability,
transparency, and decentralization of blockchain to create a secure,
tamper-proof, and trustless environment for recruitment transactions.
CHAPTER 4
TECHNICAL IMPLEMENTATION REQUIREMENTS AND WORKFLOW
BlockHire's technical implementation requirements and workflow encompass
the seamless integration of blockchain technology, smart contracts, and user
interfaces to create a decentralized recruitment platform.
Choice of Technologies
The selection of technologies for BlockHire is guided by their suitability,
compatibility, and industry best practices:
1. Solidity: Solidity serves as the primary programming language for
developing smart contracts on the Ethereum blockchain. Its robust features,
extensive community support, and compatibility with Ethereum make it the
ideal choice for implementing the platform's smart contract logic.
2. Hardhat: Hardhat is chosen as the preferred development framework for
Ethereum smart contracts and decentralized applications (dApps). Its
comprehensive toolset, advanced testing capabilities, and integrated
development environment (IDE) streamline the development process and ensure
code quality and reliability.
3. React.js: React.js is selected for the frontend development of BlockHire due
to its component-based architecture, declarative syntax, and rich ecosystem of
libraries and tools. Its flexibility, performance, and scalability empower us to
create dynamic, responsive user interfaces that deliver an exceptional user
experience.
4. MetaMask: MetaMask serves as the gateway for users to interact with the
Ethereum blockchain and access their digital wallets securely. Its seamless
integration with BlockHire provides users with a convenient and intuitive
interface for managing their transactions and interacting with the platform.
Rationale Behind Technology Selection
The selection of these technologies is driven by their proven track record,
community adoption, and alignment with industry standards. Solidity and
Hardhat offer robust development environments for Ethereum smart contracts,
while React.js provides a powerful framework for building modern web
applications. MetaMask, as a widely used Ethereum wallet interface, ensures
seamless connectivity and transaction management for users.
By adhering to a strategic technical approach and leveraging cutting-edge
technologies, BlockHire is poised to deliver a secure, scalable, and user-centric
decentralized recruitment platform that revolutionizes the hiring process.
Workflow
The workflow of BlockHire involves the following steps:
1. Job Posting: Employers post job openings on the BlockHire platform by
providing relevant details such as job title, company name, description,
employment type, location, salary range, and contact information.
2. Job Application: Job seekers browse available job listings on the BlockHire
platform and submit applications for positions of interest. Applicants provide
their credentials, qualifications, and contact details through the frontend
interface, which are then recorded on the blockchain via smart contracts.
3. Reward Distribution: Upon successful completion of recruitment processes,
such as hiring or referral bonuses, rewards are distributed to relevant parties
automatically through smart contracts.
4. Transaction Validation: All recruitment transactions, including job postings,
applications, and rewards, undergo validation and verification on the Ethereum
blockchain.
Architecture
CHAPTER 5
COMPARATIVE ANALYSIS OF RELATED WORKS
AND PROPOSED SOLUTION
=Aspect
BlockHire
LinkedIn
Indeed
Glassdoor
Direct Hiring ✓ Facilitates
direct
connection
between job
seekers and
employers
✓ Facilitates
direct
connection
between job
seekers and
employers
✓ Direct
interaction
between job
seekers and
employers
✓ Direct
interaction
between job
seekers and
employers
Skill
Verification
✓ Users can
list skills and
qualifications,
but verification
is limited
✗ Limited
skill
verification
✗ Limited
skill
verification
Endorsement ✓ Users can
endorse each
other's skills
✓ Users can
endorse each
other's skills
✗ Limited
skill
endorsements
✗ Limited
skill
endorsements
Certificate
Verification
✓ Users can
verify
certificates
and
credentials
✓ Users can
✗ Limited
list certificates certificate
and credentials, verification
but verification
is limited
✗ Limited
certificate
verification
Internship
Listing
✓ Platform
lists
internship
opportunities
✓ Platform
lists internship
opportunities
✓ Platform
lists
internship
opportunities
✓ Platform
lists
internship
opportunities
Project
Allotments
✓ Facilitates ✗ Limited
project
focus on project
allotments for allotments
freelancers
✗ Limited
focus on
project
allotments
✗ Limited
focus on
project
allotments
Payment
Processing
✓ Supports
✗ Limited
payment
payment
processing for processing
✗ Limited
payment
processing
✗ Limited
payment
processing
✓
Verification of
skills and
qualifications
completed
projects
functionality
functionality
functionality
Company
Reviews
✓ Users can
review
companies
Anonymously
✓ Users can
review
companies but
not
Anonymously
✓ Users can
review
companies
but not
Anonymously
✓ Users can
review
companies
but not
Anonymously
User
Engagement
✓
Encourages
user
engagement
through skill
endorsements,
reviews, and
project
completion
✓ Encourages
user
engagement
through
networking,
skill
endorsements,
and content
sharing
✓
Encourages
user
engagement
through job
applications
and company
reviews
✓
Encourages
user
engagement
through job
applications
and company
reviews
AI Matching
Algorithm
✓ Utilizes AI ✗ Limited AI
matching
matching
algorithms for functionality
job
suggestions
✗ Limited AI ✗ Limited AI
matching
matching
functionality functionality
Potential Drawbacks:
1. Blockchain Transaction Costs: Utilizing the Ethereum blockchain for smart
contracts incurs transaction fees, known as gas fees. These fees can fluctuate based
on network congestion and the complexity of smart contract operations.
2. Smart Contract Bugs and Vulnerabilities: Despite rigorous testing, smart
contracts are not immune to bugs or vulnerabilities. In the case of BlockHire, any
flaws in the smart contracts governing job postings, applications, or rewards
distribution could lead to unintended consequences, such as incorrect payments or
exposure of sensitive data.
3. User Adoption and Familiarity: Blockchain technology and decentralized
applications are still relatively new concepts for many users. Encouraging adoption
and fostering trust in BlockHire's decentralized recruitment platform may prove
challenging, particularly among traditional users accustomed to centralized
recruitment platforms.
CHAPTER 6
RESULTS AND DISCUSSIONS
The implementation of BlockHire has led to significant outcomes across various
aspects, prompting discussions on the achieved results and their implications.
Aspect
Outcome
User Feedback
Positive feedback on platform usability, job posting
process efficiency, and transparency in hiring decisions.
Users appreciate the ability to verify skills and endorse
candidates.
Performance Metrics Efficient job posting and application processing times,
demonstrating platform scalability and responsiveness to
user interactions.
Operational Insights
Successful integration of job posting and application
processes, regulatory compliance adherence, and
strategic partnerships for expanding the platform's reach.
Scalability
Initial scalability tests show promising results, with
ongoing optimization efforts to accommodate increasing
job postings and user traffic.
Security
Implementation of robust security measures, including
encryption protocols and authentication mechanisms,
ensuring the integrity and confidentiality of user data
and transactions.
User Adoption
Growing user base and increasing job postings,
indicating the platform's acceptance and relevance in the
recruitment market.
Impact on
Recruitment
Positive impact on streamlining the recruitment process,
reducing intermediaries, and promoting fair and
transparent hiring practices.
Discussion:
The positive user feedback, favorable performance metrics, and valuable
operational insights underscore BlockHire's success in transforming the
recruitment landscape and achieving its objectives. Users appreciate the platform's
intuitive interface, efficient job posting process, and transparency in hiring
decisions, contributing to enhanced user satisfaction and engagement.
BlockHire's emphasis on scalability, security, and regulatory compliance ensures a
robust and trustworthy platform for both companies and candidates. The successful
integration of job posting and application processes, along with strategic
partnerships, positions BlockHire as a leading solution in the recruitment industry.
Moving forward, continuous optimization efforts and expansion strategies will be
crucial to sustaining BlockHire's momentum and addressing evolving user needs.
Collaboration with industry stakeholders, ongoing user feedback mechanisms, and
technological advancements will drive the platform's growth trajectory and solidify
its position as a transformative force in the recruitment market.
CHAPTER 7
CONCLUSION & FUTURE ENHANCEMENTS
Achievements
1. Innovative Platform: BlockHire has successfully introduced a decentralized
recruitment platform, leveraging Blockchain for transparent, efficient, and secure
job transactions.
2. User Satisfaction: Positive user feedback underscores BlockHire's intuitive
interface, streamlined processes, and incentives for renewable energy adoption,
enhancing user satisfaction.
3. Operational Efficiency: Performance metrics demonstrate BlockHire's robust
transaction processing, scalability, and compliance with regulatory standards,
ensuring operational efficiency.
4. Industry Impact: Strategic partnerships, regulatory compliance, and ecosystem
integration initiatives position BlockHire as a pioneering solution in the
recruitment domain.
Limitations
1. Learning Curve: Initial complexities in user onboarding related to Blockchain
integration may pose challenges, necessitating ongoing education and support.
2. Scalability Challenges: While initial scalability tests are promising, continuous
optimization efforts are required to ensure seamless scaling with increased user
activity.
Future Enhancements and Research Directions:
1. Enhanced User Onboarding: BlockHire will focus on further simplifying the
user onboarding process by providing intuitive guides, interactive tutorials, and
seamless integration with blockchain wallets.
2. Expansion into Skill Verification and Professional Networking: BlockHire
will evolve into a comprehensive professional networking platform akin to
LinkedIn, offering features for users to showcase their skills, achievements, and
work experience. Users will be able to endorse each other's skills, verify profiles
through blockchain-secured certificates, and document internships and projects.
3. Integration of Project Allotments and Payments: BlockHire will introduce
features for companies to post project opportunities and allocate tasks to skilled
individuals within the platform. Smart contracts will automate project management
processes, including task assignment, progress tracking, and payments, ensuring
transparency and efficiency in project execution.
4. Blockchain-based Payment System: BlockHire will implement a
blockchain-based payment system for secure and instant transactions between
companies and freelancers. Smart contracts will facilitate automatic payment
disbursement upon project completion, eliminating delays and disputes associated
with traditional payment methods.
Conclusion:
In conclusion, BlockHire represents a significant advancement in the recruitment
industry, offering a decentralized solution that promotes transparency, efficiency,
and fairness in the hiring process. The platform's innovative approach, coupled
with its emphasis on user experience, scalability, and security, has garnered
positive feedback and demonstrated tangible results.
BlockHire's success in streamlining recruitment processes, reducing intermediaries,
and fostering trust between employers and candidates underscores its value
proposition in the competitive job market. By leveraging blockchain technology
and smart contracts, BlockHire has addressed key pain points in traditional
recruitment systems while paving the way for a more inclusive and meritocratic
hiring ecosystem.
Looking ahead, BlockHire is poised for continued growth and impact, with plans to
further enhance user onboarding experiences, optimize platform scalability, and
expand its global reach. Through ongoing research, collaboration, and innovation,
BlockHire aims to remain at the forefront of recruitment innovation, empowering
organizations and individuals to connect in a transparent and efficient manner.
CHAPTER 8
REFERENCES
1. MDN Web Docs (Mozilla Developer Network):
- Solidity Documentation (for smart contract development):
https://docs.soliditylang.org/en/v0.8.25/
- Ethereum Blockchain Development Guide: [Link]
https://ethereum-blockchain-developer.com/
2. GitHub Repositories:
https://github.com/topics/blockchain-platform
https://github.com/topics/hardhat-boilerplate
https://github.com/askanium/recruitment-dapp
3. Websites:
https://blog.producthunt.com/how-to-build-the-next-linkedin-but-on-the-bloc
kchain-23e4b28777f2
https://blockworks.co/news/this-startup-is-building-a-crypto-friendly-linkedin
-heres-how
4. Research Papers:
- "Blockchain Technology: Principles and Applications" by Marc P.
Christensen and Curtis W. Hrischuk
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2662660
- “SkillCheck: An Incentive-based Certification System
Blockchains” by Jay Gupta and Swaprava Nath
https://www.cse.iitb.ac.in/~swaprava/papers/skillcheck.pdf
using
APPENDIX - 1
SCREENSHOTS
Home Screen
Create a new job
Transaction Request
Block and Transaction Details
APPENDIX - 2
CODE SNIPPETS
Smart Contract
Create New Job
Available Job
APPENDIX - 3
MANUAL TO USE APPLICATION
1. Git clone the repository
https://github.com/Gairik-Shandilya/jobportal
2. Run : npm install
3. That should look to your package file for all the node modules that need
to be installed
4. Run : npm run dev
5. It will show something like ( ready - started server on 0.0.0.0:3000, url:
http://localhost:3000 ) copy the url , paste it in your browser you will be
able to see the webapp