
● Building and maintaining micro services.
● Develop new features and improve existing features of the application.
● Coding, Implementing, Unit Testing and Documenting Typescript and Javascript based services.
● Design, build, and maintain efficient, reusable, and reliable code.
● Code reviews and ensuring adherence to software development standards.
● Contribute to team and organizational improvements in process and infrastructure.
● Participating in requirements gathering and functional specification activities.
● Resolving and helping to mitigate production issues.
What you need to be successful
● Has proven himself as a solid individual contributor and has some initial management ability
● Understands the culture and upholds it
● Well respected with the team
● Looking to grow more as a manager than as an engineer
● Split time b/w hands-on technical work and people management of a small team
● Be a role model for the people in your team
● Responsible for team mentorship, technical planning, resource allocation & project delivery
● Build solid working relationships with counterparts outside engineering
● If we shortlist you for a lead role, then you'll have to mentor SDE-1 towards their SDE-2 journey.
● Progress up to manager in 2-3 years
● Strong Data Structure and Algorithms
● Experience of building micro services architectures, developing RESTful services, continuous integration, unit and integration testing.
● Proficient with Express, Jest, Sinon and other Javascript frameworks apart from
RDBMS and NoSQL databases - PostgreSQL, MongoDB
● Gauge or other BDD frameworks and experience in Fintech would be preferred.
● Fintech experience - preferred

Similar jobs
We are seeking a skilled and motivated Software Engineer with over 3 years of experience in designing and developing web-based applications using Node.js.
Key Responsibilities
- Design, develop, and maintain web-based applications using Node.js.
- Build scalable, high-performance RESTful APIs using Express.js or Restify frameworks.
- Develop and maintain robust SQL database systems, leveraging Sequelize ORM.
- Ensure responsiveness of applications across various devices and platforms.
- Collaborate with cross-functional teams during the product development lifecycle, including prototyping, hardening, and testing phases.
- Work with real-time communication technologies and ensure seamless integration.
- Learn and adapt to alternative technologies as needed to meet project requirements.
Required Skills & Experience
- 3+ years of experience in web application development using Node.js.
- Proficiency with frameworks such as Express.js or Restify.
- Strong expertise in SQL databases and experience with Sequelize ORM.
- In-depth understanding of JavaScript, browser technologies, and real-time communication.
- Hands-on experience in developing responsive web applications.
- Experience with React Native (a plus).
- Proficiency in Java.
- Familiarity with product development lifecycle, including prototyping, testing, and deployment.
Additional Skills & Experience
- Experience with NoSQL databases such as MongoDB or Cassandra.
- Knowledge of internationalization (i18n) and latest UI/UX design trends.
- Familiarity with JavaScript libraries/frameworks like ReactJS or VueJS.
- Experience integrating payment gateways for various countries.
- Strong communication skills and ability to facilitate group discussions effectively.
- Eagerness to contribute to product functionality and user experience designs.
Education Requirements
- Bachelor's or Master's degree in Computer Science or a related field.

Senior Developer should have exposure to building logistics products.
Skilled in RESTful & GraphQL APIs, microservices, and database optimization (MySQL, PostgreSQL, MongoDB).
• Experienced in authentication (OAuth, JWT), caching (Redis, Memcached), and real-time applications (WebSockets).
• Strong knowledge of CI/CD pipelines, Docker, Kubernetes, and cloud deployment (AWS, GCP, Azure).
• Passionate about scalability, performance tuning, security best practices, and clean code architecture.
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.
About Us:
We live in the realm of rising, ever evolving technology. From the cassette tape to nanotech skeletons, we’ve come a long way. Splitting an atom is no big deal – and who’d have thought that we’d talk through airwaves? Change is inevitable, and we’re the tide that brings it.
At Relinns, we breathe tech solutions and embrace innovation with open arms. With over 4 years of experience, we've had phenomenal growth which acts as a testimony to the knowledge we've come to gather over time. We have been fortunate enough to get an opportunity to work with clients such as Apollo Tyres, Shahi Exports, Manchester City Football Club, etc.
Our team is on the path of finding religion in the workplace of today. To find our way, we have three tools at our disposal: cutting edge technological tools, a meticulously dedicated work ethic, and crisp bow-tie professionalism.
About the role:
We are looking for a Node.js Developer responsible for managing the interchange of data between the server and the client. Your primary focus will be the development of all server-side logic, definition, and maintenance of the central database, and ensuring high performance and responsiveness to requests from the client end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well.
What You Need for this Position:
- Strong understanding of JavaScript, its quirks and workarounds.
- Basic understanding of TypeScript & its quirks and workarounds.
- Advanced knowledge of NPM and the most frequently used libraries (E.g: Socket.io, Underscore.js, Passport, etc.).
- Knowledge of any Node.JS ORM (Mongoose, Sequlize, Knex, etc.).
- Understanding of any of the following Node.JS frameworks: Express JS, Koa Js, Hapi JS or any other.
- Good understanding of OOP and data structures.
- JavaScript unit testing frameworks (prefer Unit.js, Mocha).
- Ability to write complex algorithms.
- Understanding of code versioning tools, such as {GIT / Mercurial / SVN}.
What You Will Be Doing:
- Develop and provide solutions on JavaScript frameworks
- Develop high-traffic, flawless web applications using Node.JS
- Participate in code and design reviews to ensure consistency in architecture and design/code practice
- Code with performance, scalability, and usability in mind
- Work on new tools in leading industry trends, with new and emerging technologies, prototypes and engineering process improvements
- Work closely with next-generation architecture development teams using cutting edge approaches and technologies
Top Reasons to Work with Us:
- We're a small, fast-paced growing team tackling huge new challenges every day.
- Learning new concepts while working with intellectual and exceptionally talented team
- Friendly and high growth work environment
- Competitive compensation

Design, develop and support real time data monitoring application and a dashboard for a VoIP network
Roles and Responsibilities:
- Design, build and maintain efficient, reusable, and reliable Ruby code
- Ensure the best possible performance, quality, and responsiveness of the applications
- Identify bottlenecks and bugs, and devise solutions to these problems
Required Skills:
- 3+ yrs of experience developing Ruby applications on Linux platform with exposure to HTML, CSS and javascripts
- Solid understanding of object-oriented programming
- Experience with any one NoSQL solution like Redis, MongoDB, CouchDB is a must
- Deep understanding of high traffic, highly scalable, complex web applications
- Ability to work in a dev-automation environment with some source control, continuous integration/delivery systems
- Good problem solving/analytical skills
- Excellent written and verbal communication
Preferred Skills:
- Conversant with Elasticsearch, Neo4j and D3.js
- Inclination to GO programming
- Experience working with open source projects
Our client is the Health-tech initiative of India's largest business house. Started in 2015, it empowers healthcare providers and consumers in India. All healthcare monitoring services are made available through an app that will help connect doctors, hospitals, pharmacies, laboratories and consumers, enabling preventive and predictive healthcare. It helps the care-givers to track the entire patient journey from the initial appointment and maintaining their records, generating lab test reports to providing virtual consultation and home-care solutions. It is expected that this futuristic guide will strengthen doctor-patient relationship and enhance the in-clinic experience.
As the Java Developer, you will be responsible for developing cutting edge health-tech applications that include high scale transaction processing, intelligent bot based programs and data analytics.
What you will do:
- Building components for the company's advanced health tech platform using Java, Solr, SpringBoot, DialogFlow
- Communicating effectively in a cross-functional product development team and present ideas and solutions effectively
- Participating in technical planning and requirements gathering phases including design, code, test, troubleshoot, and document engineering software applications
- Developing the Code as per the requirements
- Working with product team and constructing the tech roadmap
- Designing, building and scaling the company's backend microservices
- Maintaining code integrity and organization
- Applying all quality requirements to make the code production ready
- Developing and deploying new features to facilitate related procedures and tools if necessary
- Developing documentation related to technical aspects and to facilitate current support, development, upgrades, or migrations
- Designing and building efficient, reusable, and reliable Java code
- Pro actively catching and fixing bugs, and providing support for the back end services
- Managing servers and infrastructure by keeping the lights on and refining the deployment architecture
What you need to have:
- Expert at hands on programming in JAVA and J2EE
- Must be from Product based companies (Should have developed Web Apps)
- Proven expertise in Java interfaces with MongoDB (or similar noSQL databases) as well as relational databases (mySQL, Postgres etc)
- Key contributor in atleast one 6+ months development project involving SpringBoot and Hibernate
- Strong understanding of application server infrastructure
- Good working knowledge of Maven based build systems
- Good understanding of build and deployment pipelines that involve ANT and Jenkins
- Proficient understanding of code versioning tools, such as Git or SVN
- Good knowledge of working on Rest APIs , Webservices
- Excellent problem-solving skills
- Hands on experience with Lucene/Solr
- Familiarity with DiagFlow based chat bot building
- Knowledge of NLP
- Learnt AI/ML systems
- Excellent interpersonal skills and the ability to build good working relationships.
- Must be self-motivated to prioritize and manage workload and meet critical project milestones and deadlines.
- Able to effectively collaborate with a team as well as take initiative and work independently to solve problems
Synapsica is a growth stage HealthTech startup founded by alumni from IIT Kharagpur, AIIMS New Delhi, and IIM Ahmedabad. We believe healthcare needs to be transparent and objective, while being affordable. Every patient has the right to know exactly what is happening in their bodies and they don’t have to rely on cryptic 2 liners given to them as diagnosis.
Towards this aim, we are building an artificial intelligence enabled cloud based platform to analyze medical images and create 2.0 of advanced radiologist reporting.
We are backed by YCombinator and other marquee investors from India, US and Japan. We are proud to have GE, AIIMS, the Spinal Kinetics as our partners.
Join us, if you find this as exciting as we do!
Description:
Synapsica is looking for a Node.js/Python developer who is passionate about designing and implementing scalable solutions with highest quality. You will be responsible for creating high performance, responsive, and secure server-side programs to manage Synapsica platform. You will be responsible for designing, managing and supporting cloud platform and scaling our database. This role is ideal for you if you have a background in bakcned development and are looking for the next level of career growth in a fast paced, learning based and merit driven work environment.
Responsibilities:
- Design and development of our new platform modules from scratch.
- Hands on implementation of our APIs and integrations.
- Design, scaling and integration of new/existing databases.
- Ensuring the entire stack is designed and built for speed and scalability
- Design and construction of our REST APIs with best secutiry mechanisms.
- Design and implementation of continuous integration and deployment pipelines in tandem with the respective team members.
- Performance tuning and improvements in large scale systems.
- Ensuring responsiveness and cross-platform compatibility of applications.
- Owning and delivering end-to-end products, features, enhancements.
Requirements:
- Degree in Computer Science or related discipline with strong competencies in data structures, algorithms, and software design
- At least 4+ years of experience with writing Python/NodeJS/PHP/Ruby on Rails.
- Prior experience of database design and management in MongoDB, including being up on the latest practices and associated versions.
- Experience in building highly scalable business applications, which involve implementing large complex business flows and dealing with huge amount of data.
- Familiarity with AWS (or equivalent) ecosystem with end-to-end cloud deployment.
- Experience implementing code level unit tests.
- Proficiency with Git / Version control.
- Appreciation for clean and well documented code
- Excellent verbal communication skills.
- Good problem solving skills.
- Attention to detail.
- Very high sense of ownership.
- Deep interest and passion for technology

Swift is building a next generation checkout stack for India - a platform rolling up payments and logistics solution for all fulfillment needs. We give businesses the opportunity to provide a customer experience at par with the likes of Amazon and Flipkart, all the while saving money and time.
Its basically Amazon without the website listing - we let our sellers design their own sales channel :-)
We believe there are many things a seller or small business has to worry about when selling online, logistics/payments/etc shouldn't be one of them. With our solution, SMBs and D2C brands get access to technologies and services like next day delivery, same day delivery, live package tracking, Card/Cash on delivery, scheduled delivery etc, making parcel delivery just as simple as collecting payment.
We also provide robust APIs which makes it easy for developers to add shipping capabilities to their multichannel online store.
We want to be the #1 checkout platform that’s reliable, easy to use and affordable.
About you:
You have experience in Java/Scala/JVM based languages and have an understanding of server design and implementation. You are looking for challenges in growing a product from hundreds to millions of visitors per month making thousands of transactions a day.
You like working with streaming/reactive architectures and have experience/interest in setting up MongoDB based cloud infra from scratch. You generally prefer to use a minimal set of simple tools to a diverse range of complex ones.
We are looking to build a back-end cloud infrastructure (on Java/Scala with Google Cloud Platform preferably) which will be a fault-tolerant real-time stream processing system on the cloud - Our system will need to meet liveliness guarantees from a web/API application perspective (and not a big data/ETL perspective).
You like to work on a variety of projects - at this job, you’ll be developing a complex backend API infra, a reactive streaming architecture and a cloud-native, highly available API for our customers.
You have:
Experienced in any JVM based language.
Have some experience in NoSQL and architecting APIs
Strong verbal and written communication skills and the ability to work well cross-functionally.
We offer:
You to be a part of a small, but a super capable team.
The opportunity to work closely with founders to define, scope, estimate and plan various aspects of the product. Being one of the first hires at Swift, you will be involved in both high and low-level decision making. This means a lot of ownership, which we cultivate by having a flat structure.
Competitive salary and stock options from a high-growth company.



