Senior Fullstack Developer

1) Be open to learn new frameworks like Hapi.JS , Typescript , Nest.JS

2) Strong DB concepts , and hands on knowledge on MongoDB , REDIS

3) Experience working with micro-services will be a plus

4) Experience working with JWT and IAM systems will be a plus

5) Experience working with Postman , Swagger will be a plus

6) TDD knowledge is an advantage and also working with Unit Test code and familiar with test code coverage concepts.

7) Strong operating system knowledge is a plus with knowledge of how to manage threads.

8) Working experience with RabbitMQ , Kafka will be a plus

9) Strong knowledge of JS internals is a must.

What we're building

We're a small, sharp team — founders, IIT/IIM folks, and industry veterans who've done this before. No bureaucracy, no layers, no meaningless standups. You'll work directly with the founding team on problems that are genuinely hard.

What we need from you

You've spent 4–8 years in AI/ML, and at least 2 of those years building real multi-agent systems — not demos, not POCs that never shipped. You've worked on at least 2 multi-agent platforms (AutoGen, CrewAI, LangGraph, custom orchestration — whatever, as long as agents were actually coordinating and not just chained prompts).

You think about:

• Agent memory, state, and context management
• Inter-agent communication and task delegation
• Failure handling, retries, and graceful degradation
• Tool use, MCP, and external system integration
• Evaluation and observability of agent behaviour

You're probably a fit if:

• You've debugged an agent loop at 11pm and found it weirdly satisfying
• You have opinions about when not to use an agent
• You care about systems that work in production, not just on your laptop

You're not a fit if:

• Your portfolio is mostly RAG pipelines and chatbots
• Your multi-agent experience is only a tutorial project or a hackathon demo

What we offer

• Best-in-class pay — we benchmark against top-tier tech and don't lowball on talent
• Direct access to founders and a senior team of IIT/IIM grads and industry veterans
• Flexible work — async-friendly, output-driven, no performative office hours
• Real technical ownership — you'll make architecture decisions, not just implement them
• Small team means your work ships fast and actually matters

Why Sentiaflow, honestly We're early. That means some things aren't figured out yet. But it also means the person we hire here will have shaped how this company thinks about agentic systems from day one. If you want to inherit a codebase and execute tickets, we're not the right place. If you want to build something from scratch with people who take the craft seriously, let's talk.

How we hire A quick intro call to get to know each other. If there's a fit, show us something you've built — a demo, a walkthrough, a system you're proud of. That's the interview. No better signal than watching someone talk about their own work.

Basic Requirement :

node.js

•Writing web services REST and GraphQL using node.js frameworks such as express and node SDKs

•Develop low-latency, high-availability, and high-performance applications using node.js framework

•Develop using microservices architecture style and asynchronous using loopback

•Implementation of security such as web service authentication and data storage (such as database, key-value stores, and object storage) in the application

•No other fuss only code

Required Technical Expertise

•Strong proficiency in node.js, and AWS Lambda.

•Experience in PostgreSQL, MongoDB, Amazon SQS, Kafka, Amazon SNS, Dynamodb, and Firebase

•Experience in using node.js frameworks (such as express, StrongLoop)

•Experience in asynchronous programming and use of libraries in node.js

•User authentication and authorization in a microservices architecture

•Integration of multiple data sources and databases into the application

•Understanding of microservices and scalable architecture

•Experience in creating database schemas (SQL & NoSQL) for the applications

60 Decibels is a tech-powered impact measurement company that makes it easy to listen to the people who matter most. We've been in business as an independent entity since early 2019, when we spun out of the global Impact Investor Acumen.

We believe that the best way to understand social impact is by talking to the people experiencing that impact. It sounds obvious when you say it, but that is not the typical practice for many impact investors, corporations and foundations working to create social change. 

We collect social impact data directly from beneficiaries (customers / employees / suppliers) using our network of 1000+ trained research assistants in 75+ countries. We do it quickly and without the fuss typically associated with measuring social impact. Our research assistants speak directly to customers to understand their lived experience; and our team turns all this data into benchmarked social performance reports, with accompanying insights, to help our clients demonstrate and improve social performance. 

By making impact measurement simple, scalable, and comparable, we not only enable organizations to improve their products and services; we also help transform what it means to credibly measure impact, ensuring that the voices of those who matter most are always part of the story.

About the role: 

You’ll be an early engineer in a newly formed engineering team. This is a unique opportunity for you to learn, build, demonstrate, and subsequently own diverse components of our tech stack and evolve as we scale our business. As a core engineer in a small team, the role demands a high degree of self-drive and ownership, on a path to achieving outsized impact.

Your Primary Responsibility Will Be:

To Advance Our Integrated Data Capture And Insights Platform (Ruby/React/PostgreSQL) And Associated Tooling (Python)

Specifically, your responsibilities will include:

• Work with a diverse multidisciplinary team across Engineering, Product & Operations, to translate product specs into clean, functional, production-ready code.
• Participate actively in defining of the systems architecture vision to better support our team’s needs
• Grow our technical capacity by mentoring other engineers and interviewing candidates
• Collaborate with team members to identify systems, practices & technologies that suit our needs the best
• Seek, learn, adopt and advocate industry best practices. Contribute towards the engineering culture
• Troubleshooting coding problems quickly and efficiently to ensure a productive workplace

About You: First and foremost, you bring compassion and dedication to this work because it matters to you.

You are a pragmatic and product-driven engineer who is interested in solving user problems and delivering value while taking into account tradeoffs between Business and Tech. You have a bias towards action: you get your hands dirty and actively tackle problems in a way that leads to the best outcomes and brings teams together. You successfully balance flexibility and rigour, using informed judgment to make decisions. You model critical thinking and introspection, taking strategic risks and growing from mistakes. You are decisive and bold, have a growth mindset, are an excellent communicator, and know the value of being a part of an effective team

Minimum Qualification:

• At least 4+ years of experience in software engineering building SaaS platforms, products and APIs
• At least 1+ years in your current role as a senior engineer
• Strong proficiency in Ruby on Rails (primary) and Python (additional)
• Strong proficiency in data modelling, RDBMS (Postgres preferred) and NoSQL databases.
• Proficient in software design, modularity, testability and software quality
• Strong problem-solving and decision-making skills

Additional desired qualifications:

• Preferred prior experience in the following stack: Python, Ruby On Rails, React, Postgres, AWS
• Experience in working on natural language processing, and ML for text and audio.
• Fast self-learner, with aptitude and interest in learn new technologies, languages & frameworks
• Experience working on data-pipelines, and data transformation systems.
• Experience setting up, managing and ensuring best practices on public clouds like AWS, GCP, or Azure (we use AWS)

Working with 60 Decibels

We are a fun, international and highly-motivated team who believes that team members should have the opportunity to expand their skills and career in a supportive environment. We offer a competitive salary, the opportunity to work flexibly and in a fun, supportive working environment. If this sounds like the role for you, get in touch!

60 Decibels is deeply committed to having a workplace that is inclusive and anti-discriminatory. We believe that our team must embody the compassion, listening, and sense of shared humanity that is so central to our goal as an organization. We are proud to be an Equal Opportunity employer and do not discriminate on the basis of race, religion, national origin, gender, sexual orientation age, marital status, veteran status, or disability.

As a growing company, we are building towards a more universally accessible workplace for our employees. At this time, we do use some cloud-based technologies that are not compatible with screen readers and other assistive devices. We would be happy to discuss accessibility at 60 Decibels in greater depth during the recruitment process.

 About our team and our culture: we are a fun and hardworking global team that is full of smart, mission-driven folks who combine an entrepreneurial spirit with a commitment to make a positive change in the world.  

We consistently hear from our clients that the best thing about 60 Decibels is the people. To get a feel for our slightly nerdy, not-take-ourselves-too-seriously vibe, check out our monthly newsletter, The Volume.

Compensation: 60 Decibels offers a competitive salary and benefits package and the opportunity to work in a flexible, fun and supportive environment. The salary range will be adjusted according to costs of living in our country offices. 

Extra Perks: We have an unlimited leave policy and 12 monthly recharge days, on the first Friday of each month. We are a globally distributed team and we give team members opportunities to cross-pollinate and visit our different offices. 

Want to get to know us a little better?

> Sign up to receive The Volume, our monthly collection of things worth reading.

> Visit our website at 60decibels.com.

> Read about our team values here. 

What you need to have:

About Role: 

1. We are looking for a Node.js Developer responsible for managing the interchange of data between the server and the users.  
2. 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 front-end.  
3. You will also be responsible for integrating the front-end elements built by your co-workers into the application. A basic understanding of front-end technologies is necessary as well. 

Key Responsibilities: 

1. Integration of user-facing elements developed by front-end developers with server-side logic 
2. Writing reusable, testable, and efficient code 
3. Design and implementation of low-latency, high-availability, and performant applications 
4. Implementation of security and data protection 
5. Integration of data storage solutions such as database, caching servers 

Qualification & Skills: 

1. Strong proficiency with JavaScript and Typescript 
2. Knowledge of Node.js and frameworks available for it such as Express, StrongLoop, etc 
3. Proficient in database systems (eg. MySql, MongoDB, DynamoDB) 
4. Understanding the nature of asynchronous programming and its quirks and workarounds 
5. Basic understanding of front-end technologies, such as HTML5, and CSS3 
6. Understanding accessibility and security compliance 
7. User authentication and authorization between multiple systems, servers, and environments 
8. Integration of multiple data sources and databases into one system 
9. Understanding fundamental design principles behind a scalable application 
10. Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform 
11. Creating database schemas that represent and support business processes 
12. Implementing automated testing platforms and unit tests 
13. Proficient understanding of code versioning tools, such as Git