Fullstack Developer

Fountane Archipelago  ·  Island Role

A Little Bit About the Role

We are looking for a Senior Product Engineer (L3) who thrives in complexity. Most engineers build on blank canvases — you build on someone else’s mess and leave it better than you found it.

The majority of your work at L3 will be on existing, live codebases — disorganised, partially documented, built by multiple teams over multiple years. Your job is to enter those systems, understand them before touching them, extend and clean them without breaking what works, and progressively bring them up to a standard where AI tooling can accelerate further development. This is the core of what L3 does at Fountane. If you have only built greenfield projects, this role will be hard.

You are expected to be genuinely full stack: comfortable owning web applications and mobile apps, the frontend, backend, database, state management, and API integration layer — without needing to hand off to a specialist.

You will work closely with the Concept Engineer on your Island — translating their prototypes into production architecture, raising technical blockers early, and keeping the sprint honest. You will also review code, mentor junior engineers, respond to production incidents, and contribute to the network’s shared knowledge base.

All of this is done primarily with Cursor and Claude as your execution and reasoning tools. AI-assisted engineering is not a feature of this role — it is the method.

AI-First Engineering Expectation

Cursor and Claude are your primary tools — not supplements. Engineers at L3 who are not using AI at the codebase level are not operating at this level.

At L3, AI-assisted engineering means:

• Loading full codebase context into Cursor before writing a single line — understanding the system before touching it.
• Writing scoped, precise refactor prompts that isolate changes to one concern at a time.
• Using Cursor to generate tests that document existing behaviour before any restructuring begins.
• Using Claude for architecture reasoning, decision documentation, and translating CE briefs into structured technical plans.
• Producing inline documentation and decision records as part of the AI-assisted workflow — not as an afterthought.
• Sharing effective prompt patterns and Cursor discoveries with the broader Fountane network — kept to yourself, they are a missed contribution.

Key Responsibilities

Legacy Codebase Refactoring & the Cleaning Phase

This is the primary L3 engagement type at Fountane. You will be handed existing, partially documented codebases — built by previous teams, often without tests, with inconsistent patterns — and your job is to refactor them into a clean, AI-promptable state without losing existing functionality. You use Cursor’s codebase context window to navigate safely, write characterisation tests before touching anything, and make changes in small, reviewable increments. The standard is: every module you leave should be easier to extend by AI tooling than when you found it.

Full Stack Development — Web & Mobile

Build and own the full application layer: React / Next.js web frontends, React Native or Flutter mobile apps, Node.js / Python backends, and relational and non-relational databases. You should be able to pick up web or mobile on any engagement without needing a handoff. Schema design, data modelling, and state architecture are yours to own — including diagnosing and fixing broken or leaking state in existing frontends.

Third-Party API Integrations

Integrate complex third-party services — payments (Stripe), communications (Twilio), auth (Auth0), and others — reliably and without creating brittle dependencies. Own the integration layer end to end: error handling, retries, failure modes, and documentation. If a third-party integration is flaky in production, that is your problem to own.

CE Collaboration & Sprint Integrity

Work directly with the Concept Engineer to translate prototypes into buildable technical plans. Review CE briefs before the sprint starts — if the scope is technically unrealistic, the time to say so is before work begins, not on demo day. Raise blockers against acceptance criteria proactively. You are the technical check on what the CE promises the client.

Security Awareness

Write code that does not require the Lead to security-audit every line. This means: input validation by default, no hardcoded secrets, correct auth scoping, safe handling of user data, and awareness of common vulnerabilities (injection, broken auth, insecure direct object references) in the context of the stacks you work in. You are not the security architect — the Lead owns that — but you are expected to produce code that does not introduce obvious vulnerabilities.

Production Incident Response

When something breaks in production, you are on it. Diagnose the issue, apply a safe fix or rollback, document what happened and why, and hand a clear summary to the Lead for the client post-mortem. Speed matters, but a bad fix that causes a second incident is worse than a slow fix that is correct. Response expectation: acknowledged within 1 hour, resolved or escalated with a clear status within 4 hours.

Codebase Navigation & Safe Refactoring

On all engagements — not just Cleaning Phase work — keep changes small, focused, and reviewable. One type of change per commit. Write tests that document existing behaviour before restructuring. Leave every module easier to understand than when you found it.

Code Review

Review pull requests from L1 and L2 engineers with specific, actionable feedback — not rubber-stamp approvals. A good code review at L3 leaves the author understanding what to do differently next time, not just what to fix now. Review weekly; do not let PRs age.

Mentoring

Review junior engineers’ code weekly with specific, useful feedback — this is distinct from quality-gate code review. The goal here is teaching, not gatekeeping. Run monthly pairing sessions to help them grow. The measure of good mentoring is whether they are becoming more capable and less dependent on you over time.

Documentation

Write short decision records when you make significant technical choices. Leave every module you touch easier to understand than when you found it. Treat documentation as part of the engineering work, not a separate task you do at the end.

Qualifications

• 5+ years of experience as a software engineer, with a strong track record on real production codebases you did not build from scratch — incomplete documentation, inconsistent patterns, other people’s decisions. If your experience is primarily greenfield, this role will be a difficult fit.
• Genuinely full stack across web and mobile: proficient in React / Next.js and at least one of React Native or Flutter, Node.js or Python on the backend, and comfortable with both relational and non-relational databases including schema design.
• Hands-on, daily Cursor and Claude usage at the codebase level. You should be able to describe concretely how you use AI in your engineering workflow — not in general terms.
• Experience integrating complex third-party APIs in production environments — not just following a quickstart guide. You should be able to describe an integration that failed in production and what you did about it.
• Solid security awareness for the stacks you work in: input validation, auth scoping, safe data handling. You do not need a security specialism, but you should not be writing code that introduces obvious vulnerabilities.
• Has conducted meaningful code reviews that improved the code and the author, not just approved the PR.
• Has coached or mentored junior engineers before, and done it well.
• Comfortable with production incident response — diagnosing issues under pressure, applying safe fixes, and communicating clearly to a Lead or client about what happened.
• Treats documentation as part of the job, not an afterthought.
• Bachelor’s or Master’s in Computer Science or a related field, or equivalent experience.

About Fountane

Fountane is a technology ventures lab - one part product studio, one part startup engine. We build high-quality software and AI products for clients ranging from fast-moving startups to large enterprises, and we co-build and invest in new companies when we see the right opportunity.

Founded in 2017 and headquartered in Minneapolis, we have grown to 60+ people across four continents and were recognised as one of America’s fastest-growing companies, ranking No. 699 on the Inc. 5000 with 595% three-year growth.

We are radically open-minded, serious about craft, and direct about expectations. If you want to do meaningful work without politics, this is the place.

Role: Full Stack Developer

Experience: 6–9 Years

Location: Pune / Bangalore

Work Mode: Hybrid (3 Days Work from Office)

Shift: General Shift

Payroll: Haparz

About the Role

We are seeking a highly skilled Full Stack Developer with expertise in modern Java technologies, React, and NodeJS to design and build scalable enterprise applications. The ideal candidate should have hands-on experience in developing microservices-based applications, designing APIs, and working with modern front-end frameworks. Experience with AI-enabled systems, LLM integrations, or intelligent automation platforms will be an added advantage.

Key Responsibilities

• Design, develop, and maintain scalable full-stack applications using Java, React, and NodeJS.
• Build and maintain RESTful APIs and microservices using Spring Boot and Spring Framework.
• Develop responsive and reusable front-end components using React.
• Work with Hibernate/JPA for database integration and persistence.
• Design and optimize database schemas, queries, and stored procedures in Oracle or PostgreSQL.
• Develop event-driven applications and asynchronous processing solutions.
• Collaborate with cross-functional teams including Product, QA, DevOps, and Business stakeholders.
• Participate in application architecture discussions and technical design reviews.
• Ensure code quality through unit testing, code reviews, and best development practices.
• Work with CI/CD pipelines and cloud platforms for deployment and monitoring.
• Explore and implement AI-driven development approaches, including LLM integrations and intelligent automation where applicable.

Required Skills

Backend Technologies

• Java 17/21
• Spring Framework 6.x
• Spring Boot 3.x
• Hibernate 6.x
• REST APIs
• Microservices Architecture
• Event-Driven Systems

Frontend Technologies

• ReactJS
• JavaScript
• TypeScript
• HTML5
• CSS3

Additional Backend Skills

• NodeJS
• API Design
• JSON
• Maven/Gradle

Database

• Oracle Database
• PostgreSQL
• SQL Optimization

Cloud & DevOps (Preferred)

• PCF (Pivotal Cloud Foundry)
• AWS
• Azure
• Docker
• Kubernetes
• CI/CD Pipelines
• Git

Good to Have

• LLM Integrations
• AI-enabled Automation
• Intelligent Agents
• Agentic Architectures
• GitHub Copilot
• Claude
• Codex
• Prompt Engineering concepts

About Us

Zentosys Solutions Pvt. Ltd. is a technology-driven IT services company specializing in modern web and mobile application development. We empower businesses worldwide with innovative, scalable, and efficient software solutions. Be a part of our dynamic team and contribute to building impactful digital products.

Responsibilities

• Develop, maintain, and optimize full-stack applications using modern technologies.
• Implement backend logic using Node.js, TypeScript, and frameworks like Express.js or NestJS.
• Build intuitive, responsive, and high-performance frontend applications using React.js, Next.js, or similar frameworks.
• Design and integrate RESTful APIs and ensure seamless communication between front-end and back-end systems.
• Utilize CI/CD pipelines for automated deployment and continuous integration.
• Manage and optimize cloud infrastructure using AWS services.
• Debug, troubleshoot, and ensure application reliability and performance across the stack.
• Design database schemas and manage MongoDB for efficient data handling.
• Collaborate with cross-functional teams, including DevOps, designers, and product managers, to deliver high-quality solutions.
• Stay updated with the latest technologies, frameworks, and best practices in software development.

Requirements

• Experience: 2+ years in full-stack development.
• Strong expertise in Node.js, TypeScript, and backend frameworks like Express.js, NestJS, or Fastify.
• Proficiency in frontend technologies like React.js, Next.js, HTML5, CSS3, and JavaScript (ES6+).
• Hands-on experience with CI/CD pipelines and tools such as Jenkins, GitHub Actions, GitLab CI, or similar.
• Practical knowledge of AWS services, including EC2, S3, RDS, Lambda, and IAM.
• Experience with database schema design and management using MongoDB.
• Strong problem-solving skills with a logical and analytical approach to challenges.
• Familiarity with Git for version control and collaboration in a team environment.
• Excellent communication and teamwork skills to contribute effectively in a collaborative setting.

Preferred Skills

• Exposure to GraphQL for API development.
• Knowledge of Docker and container orchestration.
• Familiarity with Serverless Framework for deploying cloud-native applications.
• Experience with testing frameworks like Jest, Mocha, or Cypress.
• Understanding of state management libraries like Redux, Zustand, or similar.
• Hands-on experience with Terraform or other infrastructure-as-code tools.

What We Value

• Problem Solvers: Professionals who can tackle challenges with creativity and precision.
• Team Players: Individuals who thrive in a collaborative, dynamic environment.
• Growth Mindset: Developers who are eager to learn, adapt, and grow with the organization.

What We Offer

• Competitive salary in the range of ₹6 LPA to ₹15 LPA based on skills and experience.
• Work on diverse and impactful projects for a global clientele.
• A culture that encourages innovation, professional growth, and skill enhancement.
• Flexible working hours and a healthy work-life balance.
• Exposure to cutting-edge technologies and tools.

Job Type: Full-time

Pay: ₹600,000.00 - ₹1,500,000.00 per year

Benefits:

• Provident Fund

Schedule:

• Monday to Friday

Education:

• Bachelor's (Required)

Experience:

• Full-stack development: 2 years (Required)

Work Location: In person

Expected Start Date: 05/02/2025

Numadic is hiring a Fullstack Developer

We are Numads

Drawn to the unknown, we are new age nomads who seek to bring near what is far. We work as full stack humans, able to operate independently while enjoying the journey together. We see past the sandlines of clan and craft and value the unique and special talents of each. We think, we design, we code, we write, we share, we care and we ride together. We aim to live by our values of Humility, Collaboration and Transformation.

We undisrupt vehicle payments

To impact a highly fragmented v-commerce space, we aim to bring order to simplify & aggregate. We are a full stack v-commerce platform. We build the Network side of the products to achieve dense on-ground digital coverage by working with & aggregating different types of partners. Further help set the standards for scaling sustainably for the future. We also build the User side of the products to make road travel experience for our vehicle owners and drivers contactless and fully autonomous. 

About the role:

1. Meet both technical and consumer needs.
2. Design client-side and server-side architecture that can scale to thousands of end users.
3. Ensure cross-platform optimisation and responsiveness of applications.
4. Write and review technical documentation.
5. Diagnose and fix bugs and performance bottlenecks.
6. Maintain code and write automated tests to ensure the product is of the highest quality.
7. Create security and data protection processes.
8. Design and develop efficient APIs.
9. Ability to quickly adapt and migrate code to most current technologies.

Why is the opportunity exciting

We are a startup and provide an opportunity to be a part of a fast growing company. With full ownership, you will have the direct ability to make a difference and lead teams. You will work and learn from among a diverse group of Numads. You will solve first-to-market problems to be taken globally. We are based out of Goa and we offer a great opportunity to work from one of the most beautiful parts of India.

Role requirements:

1. 2+ years of proven experience working as a Fullstack Developer
2. Proficiency with multiple front-end languages and frameworks (e.g. HTML, CSS, JavaScript, React, React Native)
3. Knowledge of back-end languages (Node JS)
4. Knowledge of AWS, Firebase, GIT and CI/CD tools.
5. Hands-on experience with databases (e.g. Postgres, MongoDB).
6. Bias for action - ability to move quickly while taking time out to review the details.
7. Clear communicator - Ability to synthesise and clearly articulate complex information, highlighting key takeaways and actionable insights.
8. Team player - Working mostly autonomously, yet being a team player keeping your crews looped-in.
9. Education - Degree in Computer Science or relevant field or relevant experience.
10. Mindset - Ability to take responsibility for your life and that of your people and projects.
11. Mindfulness - Ability to maintain practices that keep you grounded.

Join Numadic

From the founders to our investors and advisors, what we share is a common respect for the value of human life and of meaningful relationships. We are full-stack humans, who work with full-stack humans and seek to do business with full-stack humans. We have turned down projects, when we found misalignment of values at the other end of the table. We do not believe that the customer is always right. We believe that all humans are equal and that the direction of the flow of money should not define the way people are treated. This is life at Numadic.

SKILL AND EXPERIENCE REQUIRED:

• 2+ years of experience in Java skills.
• 2+ years of hands-on HTML5/CSS3 experience.
• Experience with popular JavaScript frameworks such as ReactJs or Angular 2.0; experience preferred.
• Experience of working with HTTP 1.1, and HTTP/2.
• Experience with RESTful APIs and JSON RPC.
• Ability to write clean, bug-free code that is easy to understand and easily maintainable.
• Experience following Git workflows.
• Working knowledge of DevOps tools (e.g., Terraform, Ansible, Jenkins, Kubernetes, Helm and CI/CD pipeline etc.).

Full Stack Engineer Role

🏘 Why Propacity?

In a country like India where every Indian aspires to have a home which provides both emotional & financial stability. Typically, real estate brokers are responsible for closing transaction for buyers, and sellers. In fact, the data suggests > 90% transactions occur via 1.5 million real estate brokers.

Unfortunately, real estate brokers are having a painful time managing their business on their own. This is leading to awful customer experience for buyers, and sellers.

Propacity is creating a platform which empowers real estate brokers to create trustworthy experience for Indians customers looking to invest their life savings.

🏚 What does Propacity Platform do?

• Solve for lead generation, lead management, market insights, growth opportunities, and more
  
  
• The platform makes the broker more efficient, more data informed, increases his income, and enables him to engage better with customer.

💛  Team Propacity

Started in 2020, we are of one of India's fastest-growing PropTech startup. We are a team of startup heroes, technology enthusiasts, product makers and business operators who want to create trustworthy real estate experience for Indians investing their lifesavings in the real estate.

Currently, working with over 200+ real estate brokers in 20+ Indian Cities.

Our team is super passionate, customer obsessed and extremely supportive of each other.

🚀 Why join us?

As a Full Stack Founding Engineer, you will be responsible for the technical implementation of Propacity Platform with other A+ Engineers

We are redefining the real estate industry. It will be hard and there are a ton of challenges facing us. However, with the right mindset, strategy, and the world-class team that we’re building, we know we can push the world forward, and build the biggest business imaginable.

 👩🏽‍💻👨‍💻 YOUR ROLE 

• Develop code for the Propacity Platform
• Collaborate with the product & design team for making decisions based on your codebase expertise
• Own the development process from the architecture stage till the product is shipped
• Promote code quality, new technologies, and architectural design within the company
• Work and develop a team of engineers who can ship fast
• Have fun collaborating with your team, and communicate as much as you can

✅  Should Have Expertise:

• Experience: You have 3+ years of professional product development experience with MERN Stack :  building server applications in Node.js along with JS Frameworks, system design.

• Server expertise: Good experience with deploying applications on AWS & devops

• Databases: You have in-depth knowledge of RDMS as well as no-sql databases and are capable of designing scalable database models based on the product and security requirements. You have also experience with in-memory databases such as Redis and queuing frameworks for running tasks asynchronously.

• Front end expertise: Good understanding of React.js, frameworks, and libraries

• CS Fundamentals: You possess strong computer science fundamentals: data structures, algorithms, API’s, micro-services, distributed systems, and information retrieval.

• 3rd Party API integrations: API Integrations for fb, Instagram, google ads & more into our product

• Github: You have some JS projects/products on GitHub Repository that are worthy of public view.

• Product focused: You take pride in building innovative and shipping fast

• Problem solver: You excel at understanding and solving complex problems. You have great attention to detail.

• Quality communicator: You can break down tricky topics in writing and work with the team together

• Feedback: You are humble, kind, and are open to product feedback

• Location: Remote/New Delhi

✅  Good to Have:

• Automated Tests: Automated Tests to test the Restful API’s

• Design Basics: Basic understanding of the Figma Tool

• Mobile Applications: Basic Understanding of app. development via React Native 

 🤙  OUR HIRING PROCESS

Yes, we make sure every candidate who joins Propacity brings in the right DNA, has growth mindset, maximises peer-to-peer learning, ownership oriented and enjoys building tech products. 

Step 1: You apply for the job at Propacity

Step 2: Short Intro Call with the Founder(s)

Step 3: Technical Interview Round(s)

Step 4: Evaluation of your Technical Expertise

Step 5: Founder Round for DNA Check

Step 6: Job offer rollout

Step 7: Join the Team Propacity & start building

🎁  PROPACITY BENEFITS 

🕰 Generous Office Timings 

• Flexible working hours
• Flexible Leave Policy

✍️ Investing in Your Growth 

• Mentoring by top industry talent
• Working Directly with the Founders
• Shared Learning with Super Smart Team Members
• Ownership to build products and teams

💰 Financial Success 

• Company ESOPS
• Expected CTC : 18 - 25 Lakhs per annum

Security Innovation is hiring a full-stack Django/Python developer to join our internal tools and automation development lead to improve and maintain our reporting portal and build new and exciting customer-facing features. Our reporting portal is a critical piece of our Application Security Assessment team infrastructure, it helps us to automate attacks and drives the authoring and reviewing process of almost every document we write and deliver to our customers. We have an exciting roadmap of new features that will help automate more attacks and improve the efficiencies for our Security Engineers, Project Managers, and the company as a whole.

Working closely with our engineers, other developers, Director of Services, SVP of Engineering, and CFO, you will help deliver valuable features from a growing list of features. You will be involved in choices that drive our front-end design, improvements in our CI/CD pipeline, and building and integrating new and novel scanners and automation.

• 2+ years of production web development experience
• Experience developing internal tools
• A public repository of code or a portfolio of applications or websites

• Expertise in Django, Python 3, Linux, HTML, CSS
• Experience with Docker & Docker Swarm mode
• Experience with git, GitLab, and GitLab CI
• Familiarity with:
  • jQuery, Bootstrap, React, ES6 Javascript
  • SAML, LDAP
  • restic, docker-machine
  • wkhtmltopdf
  • AWS Services and Security features