11+ Smart Contracts Jobs in Kolkata | Smart Contracts Job openings in Kolkata

Rejolut is one of the award winning fastest growing emerging tech company which is working on leading technology like Blockchian, ML & AI, Complex mobile & web apps, IoT etc.

The ideal candidate will be responsible for developing highly scalable and secure code.

Responsibilities:-
-Able to take the Extreme Ownership of modules/product/projects
-Able to learn & implement new technology/framework/library/networks at God Speed
-Able to come with optimal solution for the business problem
-Can handle calls with the client & customer to know their feedback
-Writing clean code & able to dig into other's code or open source code

Desired Candidate Profile:-

• Setting up and configuring Full node clients for various Blockchains.
• In Depth understanding of atleast two blockchain network like Ethereum, Hedera Hashgraph, Tezos, Hyperledger, BlockApps, Algorand, Corda etc
• Working closely with DevOps to make blockchain infrastructure robust and scalable.
• Designing and writing well-structured APIs in Node.js to connect to Blockchain infrastructure.
• Develop and manage various applications to integrate Blockchain infrastructure into the main product.
• Staying up to date with new developments and news in integrated chains, like forks, main net launches, migration.
• Documenting architecture and guidelines.
• Always being on the lookout to enhance technology, by finding and making new tools, utilities, and libraries.
• Managing and enhancing a cutting edge tech stack, comprising of Node.js, ES2016/17 (Javascript), AWS, MongoDB, SQL
• Cross-team contribution whenever required.
• Familiarity with basic cryptography
• Familiarity with P2P networks

Culture

- Fast-paced, intellectually stimulating, steep learning, and growth

- Close-knit, hardworking, supportive colleagues

- Challenging work

- Flat organization with no hierarchy

- If you like problem solving, and love latest technology, there are very few better places

How we are different 
 -We are young and dynamic team who are obsessed with solving business problem at scale -We are a technology agnostic company who focus more on finding the optimal solution to business problem rather than technology

 Why to join us
 -We provide huge learning curve. Spending 1.5-2 years with us will put you 3 years ahead in the career
-We work only on cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, ELM
-There are two technology Co-founder in the company who are pretty much hands-on and have earlier bult the Consumer application which is downloaded millions of time and are in leadership position in copanies like Samsung, Purplle, Loylty Rewardz
-Get mentored by the best in the industry
-Flexible working hours
-Perks best in the industry

Job Title: Operations Executive

Location: Kolkata

Job Description:

We are looking for a highly organized and proactive Operations Executive to join our growing team. The ideal candidate will be responsible for managing the backend processes that support smooth day-to-day operations, especially in areas such as travel bookings, billing, chauffeur coordination, and customer support. The role demands a detail-oriented individual with excellent analytical skills and a commitment to accuracy and customer satisfaction.

Key Responsibilities:

1. Operational Support

• Manage and process travel bookings (domestic and international) in coordination with internal teams and third-party vendors.
• Monitor and verify billing records, ensuring all invoices, receipts, and payment details are accurate and aligned with company policies.
• Handle and coordinate chauffeur services, ensuring timely vehicle allocation, schedule adherence, and issue resolution.

2. Customer Interaction

• Respond to customer queries via email and phone in a professional and timely manner.
• Ensure customer satisfaction by providing effective resolutions to complaints, delays, or discrepancies.
• Maintain detailed logs of customer interactions, feedback, and action taken.

3. Data Management & Reporting

• Maintain and update internal databases, spreadsheets, and booking systems to ensure real-time data accuracy.
• Analyze operational data to identify inefficiencies, cost-saving opportunities, and performance trends.
• 
  

Required Skills:

• Strong numerical and analytical ability; comfort with handling data and making calculations.
• Proficiency in MS Office Suite (Excel – VLOOKUP, Pivot Tables; Word; PowerPoint).
• Excellent communication (verbal and written) in English; additional language proficiency is a plus.
• Ability to handle pressure and multitask efficiently in a fast-paced environment.
• Strong organizational and time-management skills.
• Positive attitude with a problem-solving mindset and the ability to work independently or in a team.

Experience: 0–2 years; prior experience in travel booking, billing, chauffeur services, or back-office operations is highly preferred.

Working Days: 6 days/week

Timing: 11am-9pm

Job Title: HR Recruiter

Location: Chinarpark, Kolkata

Salary: Up to ₹15,000 per month

Job Type: Full-time

Gender Preference: Male Candidate

Our key business verticals include:

• Sportiqo Fitness – A modern fitness and wellness brand.
• Anytime Fitness – A global fitness franchise promoting a healthy lifestyle.
• LawCatalyst – A legal consulting and corporate compliance firm.
• Eventigo – A creative event management and corporate branding division.
• Being Iban Media & Entertainment – Specializing in media production, promotions, and digital content.
• Being Iban Academy – Focused on professional training and skill development.

Being Iban Pvt. Ltd. offers a dynamic work culture with opportunities to grow and collaborate across diverse industries.

About the Role

We are looking for a dynamic and result-oriented HR Recruiter to manage the end-to-end hiring process across our various business units. The ideal candidate should have strong communication skills, a confident personality, and hands-on experience in recruitment. Immediate joiners preferred.

Key Responsibilities

• Handle the entire recruitment cycle — sourcing, screening, interviewing, and onboarding.
• Onboard Candidates on their Day 1.
• Source candidates via job portals, social media, referrals, and professional networks.
• Coordinate and schedule interviews with concerned department heads.
• Ensure timely closure of open positions and maintain recruitment trackers.
• Maintain candidate databases and generate hiring reports.
• Assist in onboarding documentation and HR coordination activities.
• Provide an excellent candidate experience throughout the process.

• Meet the Targeted Deadlines to fill the position.

Requirements

• Bachelor’s degree in Human Resources or a related field.
• 2–4 years of experience in recruitment (preferably in multi-sector hiring).
• Excellent communication and interpersonal skills.
• Presentable personality with a professional attitude.
• Ability to multitask and meet deadlines.
• Immediate joiners preferred.
• Male candidate only.

*Job Title:* Accounts Executive

*Location:* Kolkata

*Experience:* 3+ years

*Salary:* Market Standards

*Job Type:* Full-time

*About Us:*

Hiring Gem is seeking an experienced Accounts Executive. The ideal candidate will have a strong background in accounting, excellent analytical skills, and the ability to work in a fast-paced environment.

*Responsibilities:*

- Manage and maintain accurate financial records and accounts

- Prepare and review financial statements, reports, and budgets

- Analyze financial data to identify trends and areas for improvement

- Ensure compliance with accounting standards and regulatory requirements

- Manage accounts payable, accounts receivable, and payroll

- Coordinate audits and provide necessary documentation

- Develop and implement financial processes and procedures

- Provide financial insights to support business decisions

*Requirements:*

- 3+ years of experience in accounting

- Bachelor's degree in Commerce/Accounting

- Proficient in accounting software (Tally, etc.)

- Strong knowledge of accounting standards and regulations

- Excellent analytical, communication, and problem-solving skills

- Ability to work in a team environment

*What We Offer:*

- Competitive salary (market standards)

- Opportunities for professional growth and development

- Dynamic work environment

- Collaborative team culture

*Note:* Only shortlisted candidates will be contacted for further discussion.

Urgent Opening for the experienced Quality Analyst for the International Sales Process

1-3 yrs of exp as a Quality Analyst in any International Sales process

Salary: - 20k-30k in hand

Shift Timing:- 7.30pm-5am(US Shift)

Call Tania

Required Candidate profile

Minimum 6 months of experience as a Call Quality Analyst in any International Sales process

Should have an experience in Editing and Auditing the calls

Exp in AUS Energy would be an advantage

Excellent coms in English

Perks and Benefits

Salary on 1st of every month

5 days working

We are seeking an experienced and highly motivated Business Development Associate/Executive to join our dynamic team. As a Business Development Associate, you will play a critical role in expanding our business by generating leads and managing relationships with foreign and Indian clients. We are looking for an individual with a proven track record in lead generation and a strong ability to handle international clients.

Responsibilities:

Conduct market research to identify potential leads and target industries.

Utilize various channels such as online platforms, social media, industry events, and networking to generate leads.

Develop and implement effective strategies to attract and engage potential clients.

Understand client needs and requirements, and propose suitable solutions and services.

Conduct regular client meetings, both in person and virtually, to discuss ongoing projects, address concerns, and identify new opportunities.

Shift Timing: 1pm-9.30pm (UK)

7.30pm-4.30am (US), drop available

** Must have excellent communication skill in English.

Freshers also can apply.

Interview Mode: Face to face

Contact: Sanjukta (HR) @ 90381^69266/ sanjukta.seal at the rate adretsoftware.com

 ​IT experience in analysis, design, development, documentation, implementing, and testing of software systems in Java, ​Spring Boot, Hibernate, and Internet technologies.

​- ​Spring Boot includes real-world experience working with ​Microservices Architecture, Plugin Services.

​- ​Strong experience in Spring Frameworks such as Spring MVC, IOC, AOP, and Spring JDBC.

​- Strong knowledge of the ​DevOps, AWS Environment, Code Versioning ​- ​Strong hands-on experience with Spring IO, Spring Boot with Thyme leaf.

​- ​Experience in implementing Java EE design patterns such as MVC, Singleton, Session Façade, DAO, DTO, and Business Delegate in the development of Multi-Tier distributed Enterprise Applications.

​- ​Good experience in developing Web Services SOAP, JAX-WS, WSDL.

​- ​Experience in core Java-Multithreading, collections, Servlets and JDBC.

​- ​​Strong knowledge on RDBMS concepts and broadly worked ​Postgres, MySQL technologies such as MongoDB

​- ​Experience in designing front-end ​technologies like ReactJS will be an add-on​

​- ​Hands-on experience with build and deployment tools including Ant / Maven, logging and Debugging using Slf4 and Log4j, and unit and integration testing using JUnit.

​- ​Experience with Use-Case design, Class, and Sequence diagrams using UML.

​- ​Excellent team player with good analytical, strategic planning, and interpersonal and communication skills. Highly motivated, enthusiastic, and self-starter.

Ésah Tea is a brand devoted to giving you the ultimate tea experience. We believe that joy and warmth can be shared in many forms but is best when shared with a cup of tea. Our tea is made with absolute care and honesty by the best growers in Assam who believe in only giving the best.

Our tea is the perfect harmony of aesthetics, flavor, complexity, and health. Our mission to give you the best tea experience as a result of the respect we have for the art and craft of tea making and its culture. Directly from the tea gardens of Assam, from the most authentic growers with finesse in the cultivation of tea, our mission is to give you the best experience. We care about our environment and believe in sustainable and ethical extraction and production. Our initiative to switch to plastic-free teabags is a result of adopting sustainability as an ethic.

Ésah Tea recently raised a Pre Series A round from a well-known VC and has some milestones that the company would like to achieve. As it is well known in the eCommerce industry, achieving higher milestones month after month, year after year is a standard. Hence, Ésah Tea is looking to build a core team that can take it towards the next stage of its eCommerce journey. So if you think that you are perfect to work in a Startup, Let's have a chat.

The Job

• Manage paid acquisition channels like Google Ads and Facebook Ads. Analyze the results and optimize individual campaigns.
• Be responsible for the ROI of dozens of campaigns you execute.
• Own, drive, and report on crucial marketing efficiency metrics such as CAC, LTV, and, ROAS
• Understand your target audience and customer behaviors. You create strategies and campaigns, understanding the entire user journey from account creation until purchase.
• Analyze creative data and make recommendations to the Creative designers
• Come up with a hypothesis and test it scientifically to consolidate learnings, thereby increasing the baseline of the team's quality.
• Document findings in a structured way to contribute to the company's global knowledge base

Collaborate with international peers in other geographical markets to keep the highest possible baseline quality in your campaigns.

The Ideal Candidate

• 2-4 years of paid marketing experience, preferably in consumer-facing products
• Fluent in English (Advanced writing and speaking English skills)
• Experience with creative experimentation
• Experience with fast-paced, high growth startups
• Strong analytical and problem-solving skills
• A natural strategist
• Makes fast business decisions that prove to be profitable

Nice to have

• SQL
• Understanding of ad platforms algorithms

Experience with programmatic media (DSP)

Note: Must Be willing to relocate to Guwahati, Assam