Blockchain Developer

- 0-3 application development experience in solution building on Blockchain technology.
- Solid understanding of and experience in blockchain / distributed ledger technologies familiarity with platforms, such as Ethereum and Hyperledger.
- Any additional expertise with Python, containerization (Docker) and additional Cloud exposure also a huge plus
- Security Architecture / Cryptography is a plus.
- Any additional expertise with Python, containerization (Docker) and additional Cloud exposure also a huge plus.
- Experience on development tools such as Hyperledger Fabric/Sawtooth,Geth , Composer, Solidity Remix Functional
- Basic understanding of Web applications architecture and protocols.

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A BIT ABOUT US
Appknox is one of the top Mobile Application security companies recognized by Gartner and G2. A profitable B2B SaaS startup headquartered in Singapore & working from Bengaluru.
The primary goal of Appknox is to help businesses and mobile developers secure their mobile applications with a focus on delivery speed and high-quality security audits.
Our business includes Fortune 500 companies with Major brands spread across regions like India, South-East Asia, Middle-East, Japan, US, and expanding rapidly.
The Opportunity:
We are seeking a highly skilled Senior Software Engineer (Backend) to join our dynamic software development team. In this role, you will contribute to key backend projects, collaborate across teams, and play a vital part in delivering robust, scalable, and high-performance software solutions. As a senior engineer, you will work independently, make impactful technical decisions, and help shape the backend architecture while collaborating with a passionate, high-performing team.
You will work hands-on with products primarily built in Python, with opportunities to contribute to Golang. These technologies are at the core of our development stack, and your focus will be on building, scaling, and maintaining distributed services. Distributed systems are integral to our architecture, providing a chance to gain hands-on experience with maintaining and optimizing them in a fast-paced environment.
As a Senior Engineer, you are expected to:
- Write clean, maintainable, and testable code while following best practices.
- Architect solutions, address complex problems, and deliver well-thought-out technical designs.
- Take ownership of assigned modules and features, delivering them with minimal supervision.
- Contribute to code reviews and technical discussions, ensuring high-quality deliverables.
We highly value open source contributions and encourage you to check out our work on GitHub at Appknox GitHub. While no prior experience in security is required, our experienced security professionals are available to support you in understanding the domain.
This role offers a unique opportunity to work on cutting-edge technology, drive impactful solutions, and grow within a collaborative environment that values autonomy, innovation, and technical excellence.
Responsibilities:
- Contribute to backend development for a cutting-edge product in the Security domain, with focus on performance, reliability, and maintainability.
- Implement software components and features based on high-level architectural guidance using Django and Django REST Framework (DRF).
- Collaborate with senior engineers to translate functional and technical requirements into robust backend implementations.
- Write clean, modular, and testable code following industry best practices and team standards.
- Participate in design discussions and code reviews to maintain code quality and continuously learn from peers.
- Work closely with frontend, QA, and security teams to deliver well-integrated, end-to-end solutions.
- Troubleshoot, debug, and resolve issues in existing systems, ensuring stability and efficiency.
- Contribute to the creation of technical documentation for components and modules you build or maintain.
- Follow defined verification plans and contribute to improving test coverage and automation.
- Participate in sprint planning, estimations, and agile ceremonies to support timely and effective project delivery.
- Proactively seek feedback and continuously improve your technical skills and understanding of system architecture.
- Support team success by collaborating effectively, sharing knowledge, and guiding junior team members when needed.
Requirements:
- Solid hands-on experience with Django and Django REST Framework 3-4 years
- Good understanding of relational databases, SQL, and working with ORMs such as Django ORM.
- Ability to contribute to design discussions and implement well-structured, maintainable backend systems.
- Exposure to writing unit and integration tests; familiarity with CI/CD pipelines and version control systems
- Proficiency in debugging, performance optimization, and addressing scalability concerns under guidance.
- Strong fundamentals in data structures, algorithms, and clean coding practices.
- Able to collaborate effectively within a team and take ownership of moderately complex modules.
- Good communication skills, with the ability to document and explain solutions to peers.
- Familiarity with cloud platforms and microservices architecture is a plus.
- Self-driven with a growth mindset and willingness to learn from peers and feedback.
Work Expectations:
Within 1 month-
- Attend KT sessions conducted by the engineering and product teams to gain a deep understanding of the product, its architecture, and workflows.
- Learn about the team's development processes, tools, and key challenges.
- Work closely with the product team to understand product requirements and contribute to the design and development of features.
- Dive deep into the existing backend architecture, including database structures, APIs, and integration points, to fully understand the technical landscape
- Begin addressing minor technical challenges and bugs, while understanding the underlying architecture and tech stack.
- Begin to participate in creating action plans for new features, ensuring that design and implementation are aligned with product goals.
Within 3 months-
- Achieve full autonomy in working on the codebase, demonstrating the ability to independently deliver high-quality features from design to deployment.
- Take complete ownership of critical modules, ensuring they are optimized for performance and maintainability.
- Act as a technical resource for the team, offering support and guidance to peers on complex issues.
- Collaborate with DevOps to optimize deployment pipelines, debug production issues, and improve backend infrastructure.
- Lead discussions for technical solutions and provide recommendations for architectural improvements.
- Contribute to the design of new features by translating functional requirements into detailed technical specifications.
- Prepare regular updates on assigned tasks and communicate effectively with the engineering manager and other stakeholders.
Within 6 months-
- Be fully independent in their development tasks, contributing to key features and solving critical challenges.
- Demonstrate strong problem-solving skills and the ability to take ownership of technical modules.
- Actively participate in code reviews and technical discussions, ensuring high-quality deliverables.
- Collaborate seamlessly with cross-functional teams to align technical solutions with business requirements.
- Establish themselves as a reliable and proactive team member, contributing to the team’s growth and success.
Personality traits we really admire:
- Great attitude to ask questions, learn and suggest process improvements.
- Has attention to details and helps identify edge cases.
- Proactive mindset.
- Highly motivated and coming up with ideas and perspective to help us move towards our goals faster.
- Follows timelines and absolute commitment to deadlines.
Interview Process
- Round 1 Interview - Profile Evaluation (EM)
- Round 2 Interview - Assignment Evaluation & Technical Problem Solving discussion (Tech Team)
- Round 4 Interview - Engineering Team & Technical Founder (CTO)
- Round 5 Interview - HR
Compensation
- Best in industry
We prefer that every employee also holds equity in the company. In this role, you will be awarded equity after 12 months, based on the impact you have created.
Please be aware that all your customers are Enterprises and Fortune 500 companies.
Why Join Us:
- Freedom & Responsibility: If you are a person who enjoys challenging work & pushing your boundaries, then this is the right place for you. We appreciate new ideas & ownership as well as flexibility with working hours.
- Great Salary & Equity: We keep up with the market standards & provide pay packages considering updated standards. Also as Appknox continues to grow, you’ll have a great opportunity to earn more & grow with us. Moreover, we also provide equity options for our top performers.
- Holistic Growth: We foster a culture of continuous learning and take a much more holistic approach to training and developing our assets: the employees. We shall also support you all on that journey of yours.
- Transparency: Being a part of a start-up is an amazing experience one of the reasons being the open communication & transparency at multiple levels. Working with Appknox will give you the opportunity to experience it all first hand.
- Health insurance: We offer health insurance coverage upto 5 Lacs for you and your family including parents.

1. Design and implement RESTful APIs
2. Optimize the performance of applications for full-scale production deployments
3. Test software to ensure responsiveness and efficiency
4. Participate in code reviews
5. Write clean, scalable & efficient code along with technical documentation
Requirements:
1. 5+ years of backend development experience along with a degree in Computer Science, Statistics, or a relevant field
2. Sound knowledge and application of algorithms and data structures with space and complexities
3. Hands-on experience with JavaScript and Node.js
4. Knowledge of scripting languages like Python is a plus point.
5. Effective communication skills: Regularly achieve consensus with peers and clear status updates
6. A willingness to learn new technology, whatever lets you deliver the best product
Benefits:
1. You get to work in a liberal environment with some of the best engineers and entrepreneurs
2. Competitive CTC along with the opportunity to receive ESOPs/Tokens
3. Remote work culture
Bonus Points:
1. Understanding of web3 concepts
2. Experience working in blockchain or fintech space
3. Founded or have worked as a founding engineer in a startup previously.
4. Experience working with a remote team

At Primathon, we strive to deliver world-class software for our clients and empower our engineers to become full-stack in technology and provide them 360° experience. We are looking for champions in backend development with experience in NodeJs/Python. You would be working on NodeJs, Python, PostgreSQL, MongoDB, Redis Elastic search, RabbitMq, SQS, Docker, AWS.
Responsibilities and Duties
● Participate in agile software development, prototyping and code reviews
● As a backend engineer, you will work on backend services in Node JS, MongoDB, PostgreSQL, Redis.
● Design, implement and/or use RESTful web services
● Designing database schema
● Writing automation test cases
● Write testable, well-thought-out code within the ecosystem, embracing additional languages and frameworks when appropriate
Required Experience, Skills and Qualifications
● 1+ years of experience as a Backend developer.
● Experience designing, implementing and using RESTful Web Services with Service-Oriented Architecture.
● Knowledge & basic understanding of JavaScript frameworks like React, D3, etc and strong experience working with MVC.
● Solid understanding of version control principles, preferably using Git
● Experience using mocking frameworks, testing frameworks, dependency injection, NoSQL and/or relational databases
● Strong knowledge on how to navigate the vast and quickly evolving collection of open source projects and select the right tool for the job
● Attention to detail and the ability to build reliable, scalable, and flexible software.
Work Experience ** Minimum 2+Years


- Lead multiple client projects in the organization.
- Define & build technical architecture for projects.
- Introduce & ensure right coding standards within the team and ensure that it is maintained in all the projects.
- Ensure the quality delivery of projects.
- Ensure applications are confirmed to security guidelines wherever required.
- Assist pre-sales/sales team for converting raw requirements from potential clients to functional solutions.
- Train fellow team members to impose the best practices available.
- Work on improving and managing processes within the team.
- Implement innovative ideas throughout the team to improve the overall efficiency and quality of the team.
- Ensure proper communication & collaboration within the team
Requirements
7+ Years of experience in developing large scale applications.
Solid Domain Knowledge and experience with various Design Patterns & Data Modelling (Associations, OOPs Concepts etc.)
Should have exposure to multiple backend technologies, and databases - both relational and NOSQL databases
Should be aware of latest conventions for APIs
Preferred hands-on experience with GraphQL as well as REST API
Must be well-aware of the latest technological advancements for relevant platforms.
Advanced Concepts of Databases - Views, Stored Procedures, Database Optimization - are a good to have.
Should have Research Oriented Approach
Solid at Logical thinking and Problem solving
Solid understanding of Coding Standards, Code Review processes and delivery of quality products
Experience with various Tools used in Development, Tests & Deployments.
Sound knowledge of DevOps and CI/CD Pipeline Tools
Solid experience with Git Workflow on Enterprise projects and larger teams
Should be good at documentation at project level and code level ; Should have good experience with Agile Methodology and process
Should have a good understanding of server side deployment, scalability, maintainability and handling server security problems.
Should have good understanding on Software UX
Proficient with communication and good at making software architectural judgments
Expected outcomes
- Growing the team and retaining talent, thus, creating an inspiring environment for the team members.
- Creating more leadership within the team along with mentoring and guiding new joiners and experienced developers.
- Creating growth plans for the team and preparing training guides for other team members.
- Refining processes in the team on a regular basis to ensure quality delivery of projects- such as coding standards, project collaboration, code review processes etc.
- Improving overall efficiency and team productivity by introducing new methodologies and ideas in the team.
- Working on R&D and employing innovative technologies in the company.
- Streamlining processes which will result in saving time and cost optimization
- Ensuring code review healthiness and shipping superior quality code
Benefits
- Unlimited learning and growth opportunities
- A collaborative and cheerful work environment
- Exceptional reward and recognition policy
- Outstanding compensation
- Flexible work hours
- Opportunity to make an impact as your work will directly contribute to our business strategy.
At Nickelfox, you have a chance to craft a career path as unique as you are and become the best version of YOU. You will be part of a team with a ‘no limits’ mindset in an inclusive, people-focused culture. And we’re counting on your unique perspective to help Nickelfox grow even faster.
Are you passionate about tech? Dedicated to learning? Come, join us to build an extraordinary experience for yourself and a dignified working world for all.
What makes Nickelfox a great place for you?
In Nickelfox, you’ll join a team whose passion for technology and understanding of business has driven the company to serve clients across 25+ countries in just five years. We partner with our customers to fuel their growth story and enable them to make the right decisions with our customized technology services and insights. All in all, we are passionate to see our customers win the day. This is the reason why 80% of our business comes from repeat clients.
Our mission is to provide dignified employment and an environment that recognizes the uniqueness of every individual and values their expertise, and contribution. We have a culture that encourages everyone to bring their authentic selves to work. Our people enjoy a collaborative work environment with exceptional training and career development. If you like working with a curious, youthful, high-performing team, Nickelfox is the place for you.


The Back-end Developer primarily participates in designing and implementing new services as well as participates in customer delivery. It will be possible to influence your work profile based on your interests.
While not mandatory, a generic understanding of user interfaces and being able to position oneself as an end-user is highly desirable. We appreciate also prior knowledge of the Image Processing domain.
We are looking for well-rounded people who care about their craft and understand software development. While we value a formal degree in computer science we do not require one - a candidate with a strong background, open mind and ability to learn would be an ideal addition to our team.
That being said, here is what we think the ideal team member would be:
Responsibilities:
- Develop and Integrate Django backend and API's with frontend framework.
- Working closely with UX and Front-end Developers
- Participating in architectural, design and product development
- Designing and creating RESTful APIs for internal and partner consumption
- Working in an agile environment with an excellent team of engineers.
- Experienced with the Django REST framework
- Good experience of Python coding skills
- Hands on experience on designing and structuring of database most likely ORM (i.e MongoDB)
- Knowledge of how to build and use with RESTful APIs
- Strong knowledge of version control (i.e. git, etc.)
- Experience deploying Python applications into production.
- Working experience on Apache services.
- Knowledge of cloud services is a plus.
Qualification: Engineering from CSE/IT




We are looking for an experienced individual to join our engineering teams as a python developer.
You would be responsible for developing solutions as per business requirements. Working closely with a global team of developers and product managers and develop the solution according to the business requirements.
Required/ Must have:
• Be passionate about programming
• Understand requirements, validate assumptions, and design and develop solutions independently for users
• Ability to learn new python skills to deliver solutions
• Writing reusable, testable, and efficient code
• Identify and suggest various opportunities to improve efficiency and functionality.
• An ability to perform well in a fast-paced environment
• Review existing python solutions for quality and provide feedback
• Agile methodology experience with able to translate user stories and features into python code
• Knowledge of Pandas and experience of automating Microsoft excel and preferably other office apps
• Be flexible to learn and undertake other responsibilities as required by the team
Preferable/Good to have:
• Good knowledge in writing QA test cases and performing QA is preferable
• Coordinate with internal teams to understand user requirements and provide technical solutions
• Write and implement software solutions that integrate different systems.
• Work experience with libraries: Win32, Openpyxl, Pypdf, Pandas, Selenium
• Hands on experience with Git repository
• SQL experience is preferred
• Good Interpersonal Skills & Ability to work Independently




We’re a small team looking for passionate, execution-focused, self-starters to help us build the next generation eCommerce platform and equal the playing field for all. Our success depends on building teams who can challenge each other's assumptions with fresh perspectives. To that end, we don’t just accept differences – we celebrate them. If that sounds exciting to you, let’s talk!
We are expanding our Engineering team to India and building a stellar and diverse team composed of owners. We are looking for a backend engineer with a demonstrated track record of developing and maintaining production services, innovative thinking, and technical excellence. As a backend engineer, you will be responsible for building out the service layer that powers our frontend applications. You should have a solid understanding of software development lifecycle and software design principles. This is a great opportunity if you are looking for a huge impact at a small start-up with immense growth potential.
What you will do?
Create technical plans of projects assigned to you.
Come up with well-structured solutions to ambiguous problems and implement them.
Ship high-quality, well-tested, secure, and maintainable backend code.
Provide technical direction on our various products and upcoming projects.
Champion reliability and quality by using best practices in software engineering and modular design.
Ensure all components are scalable, maintainable, and have in-built metrics instrumentation and monitoring
Deliver an exceptional user experience to our customers. Put the customer first and have quality in mind.
Own the full release cycle from development to deployment.
What you will need?
3+ Years of experience as a software engineer working on backend applications.
Advanced knowledge of Python (preferably, the Django framework) and relational databases.
Experience with agile, test-driven development, continuous integration, and automated testing.
Experience with building, modifying, and extending API endpoints (REST or GraphQL) for data retrieval and persistence.
Experience with the full software development life cycle, including requirements collection, design, implementation, testing, and operational support.
Excellent verbal and written communication, teamwork, decision making and influencing skills.
Experience with scrum or other agile software development methodology.
Hustle. Thrives in an evolving, fast-paced, ambiguous work environment.
Bonus if you have
Experience working in the eCommerce domain.
Experience with AWS technologies like Elastic Beanstalk, Amplify, etc.



