Full Stack Engineer

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.

Position: .NET Developer

Location: Remote / On-site (Your Location)

Experience: 0–4 years

About the Role:

We’re seeking a passionate and skilled .NET Developer to join our growing team. You’ll work on modern web applications built with ASP.NET Core, Web API, MVC, and Entity Framework Core, ensuring high performance, scalability, and security.

Key Responsibilities:

• Design, develop, and maintain web and API-based applications
• Implement and consume RESTful APIs
• Work with SQL Server and LINQ for data access
• Collaborate with front-end developers and QA engineers
• Apply best practices in coding, architecture, and deployment
• Troubleshoot, debug, and upgrade existing systems

Required Skills:

• Strong proficiency in C#, ASP.NET Core/MVC, Entity Framework
• Experience with SQL Server, LINQ, and Stored Procedures
• Familiarity with HTML, CSS, JavaScript, and modern frameworks (Angular/React is a plus)
• Understanding of OOP, Design Patterns, and Clean Architecture
• Version control experience (Git/GitHub/Bitbucket)

Nice to Have:

• Experience with Azure / AWS
• Knowledge of Blazor or Microservices Architecture

Perks:

• Flexible working hours
• Long-term collaboration
• 
  

Job Title: Full Stack Developer

Company: Just Gold LLC

Location: Remote

Experience: 1-5 years

Job Description:

We're seeking a highly skilled Full Stack Developer to join our team at Just Gold LLC. As a Full Stack Developer, you'll be responsible for designing, developing, and maintaining our web and mobile applications using a range of technologies, including Node.js, MongoDB, React Native, React.js, Next.js, Java, AWS, Tailwind CSS, HTML/CSS, and JavaScript.

Responsibilities:

- Develop high-quality, scalable, and maintainable code for our web and mobile applications

- Collaborate with cross-functional teams to identify and prioritize project requirements

- Design and implement new features, components, and functionality

- Troubleshoot and resolve technical issues

- Participate in code reviews and contribute to the improvement of the codebase

- Stay up-to-date with industry trends and emerging technologies

Required Technologies:

- Node.js

- MongoDB

- React Native

- React.js

- Next.js

- Java

- AWS

- Tailwind CSS

- HTML/CSS

- JavaScript

Requirements:

- 1-5 years of experience in full-stack development

- Strong proficiency in JavaScript and its ecosystem

- Experience with Node.js, MongoDB, and React.js

- Familiarity with React Native and Next.js

- Knowledge of Java and AWS

- Understanding of front-end development principles and best practices

- Experience with version control systems (e.g., Git)

- Excellent problem-solving skills and attention to detail

- Strong communication and collaboration skills

Nice to Have:

- Experience with agile development methodologies

- Familiarity with containerization (e.g., Docker)

- Knowledge of cloud-based services (e.g., AWS Lambda)

- Understanding of security best practices and compliance

What We Offer:

- Competitive salary and benefits package

- Opportunity to work on exciting projects with a talented team

- Flexible remote work arrangement

- Professional development opportunities

- Collaborative and dynamic work environment

🎉We are HIRING

⁠👩‍💻Full Stack Developer at Adizen.ai (http://adizen.ai/)

About Adizen.ai

⁠Adizen is a company founded in September 2023 by Jashan Suri and Bhanu Chaudhary. Jashan has graduated from IIT Delhi and worked at Sequoia Capital and Bain & Company. Meanwhile, Bhanu is an IIT Kanpur graduate and a 3X founder having founded multiple startups including FoodMonk.

⁠Adizen.ai is spearheading two major ventures: crafting a healthcare software solution primarily for the UK market, and designing a custom ERP system for a Mechanical, Electrical, and Plumbing (MEP) company to boost their operational efficacy and output.

Roles and Responsibilities 

⁠We're open to hiring a fresher, but we expect you to have experience working on projects.

Tech Stack: Our tech stack includes React, Node.js, Mongo DB, and Payload.

Timeline: Full time OR 6 months internship

Kindly fill this form!

https://forms.gle/oG7nB7iepg1WG2bCA

Title : Java Fullstack Developer

Job Location: Hyderabad, Chennai, Vizag, Bangalore, Pune (100% Remote)

Responsibilities

• Strong hands-on experience with Java development.
• Designs, codes, tests, debug, and documents software, and enhance existing components to ensure that software meets business needs.
• Deploy and maintain Applications/Systems.
• Work with other software engineers for one or more Agile scrum teams assigned to work on the project.
• Contribute to the design and architecture to enable secure, scalable, and maintainable software and should be able to clearly articulate the implications of design/architectural decisions,
• issues and plans to technology leadership.
• Develop reusable patterns and encourage innovation that will enhance team velocity.
• Collaborate on the design with other team members and product owners, both inside and outside the scrum team.
• Estimate engineering work effort for engineering team and effectively identify and prioritize the high impact tasks.
• Conduct design and code reviews to ensure code developed meets coding best practices guidelines, unit testing, security, and scalability and maintainability guidelines.
• Drive a quality mindset within the team.

Skills & Qualifications Required:

• Bachelor's degree in computer science or information technology
• Minimum 4 Years of experience as Java Development
• Experience with Spring Boot
• Experience with Micro services
• Experience with Angular
• Experience with Rest API
• Must have the ability to learn the concepts of a Software Development Life Cycle.
• Understands the process of new application development and has the ability to apply these concepts with minimal mentoring and supervision.
• Must have the ability to learn to provide support & maintenance for simple to complex software applications.
• Communicates well with working teams. Motivated and willing to take initiative. Capable of working well in a team and collaborative environment.
• Adaptable to change.

• We are looking for a very Senior or Lead backend engineer with specialization in .NET technologies.
• This is an exciting opportunity to build a clean and modern framework for a customer-facing ecommerce product. You will be part of a product team in San Francisco, USA and Bengaluru, India.
• If you are passionate about building scalable services, you are well-versed with web technologies like MVC, you enjoy working with super smart people that you can learn from and contribute to their knowledge – this is the perfect position for you.
• You should have prior experience in leading engineering projects in an Agile environment, i.e. work with Product Managers to convert product specifications to technical specifications; design and code for complex features; ensure clean code is delivered by team.
• Our core application is used by 100,000+ paying customers, so there's lot of opportunity to make direct impact.

Requirements: ·

• 5+ years of experience in .NET and C#
• Expertise in developing services (SOAP-WCF and REST)
• Expertise in web development frameworks like ASP.NET MVC
• Good knowledge of database concepts and Microsoft SQL Server
• Solid foundation in computer science, with strong competencies in data structures, design patterns, concurrency, algorithms, and software design
• Experience working in any of the JavaScript frameworks like Ember.js, AngularJS or ReactJS is a bonus.
• Strong analytical and troubleshooting skills;
• Bachelors or Master’s degree in Computer Science (or equivalent).
• Note: Bangalore Office at WeWork-Bellandur.
• Salary will be on-par with best in Bangalore.

• Own and implement features used by large customers like Truecaller, Mozilla, Zomato, Netflix, etc.
• Performance, Security and Usability goals are in DNA.
• Full ownership and accountability of Microservices which includes day-to-day operations and maintenance.
• Business and technical Metric definitions and reviews.
• Drive CI & CD Evaluate technologies and development stacks for API-based platform which scales to 100,000 transactions per second.
• Perform push-button deployments of any version of the software to any environment on demand.
• Design and build web apps that are scalable and puts user experience front and center.
• Develop modular UI components for company-wide reuse.
• Evolve a common design language for UI across apps.
• Establish and advocate front-end coding guidelines.
• Meld UX and great-looking UI while keeping excellent code quality.
• Own end-to-end life cycle of the product from requirement analysis, design, development, test, release, and maintenance.
• Develop reusable tools/libraries
• Identify opportunities for automation and collaboration points.
• Continuously improve cycle time, throughput, and code quality.
• Continuously improve value-adding-activities/non-value-adding activities ratio.

• 4 - 6 years of experience in large-scale distributed systems.
• Proficient in Python/Golang/Java/ http://node.js/">Node.js 
• Understanding of CSS, Advanced Javascript, http://vue.js/">Vue.js, http://react.js/">React.js, and other web technologies.
• Understanding of Rest based API Architecture
• Writing high-performance, reliable and maintainable code.  
• Excellent microservices pattern understanding.  
• Ability to define cross-core contracts and bring them to closure through collaboration.
• Good knowledge of database structures, theories, principles, and practices.  
• Experience working with AWS components [EC2, S3, RDS, SQS, ECS, Lambda].
• Analytical and problem-solving skills  
• Good aptitude in multi-threading and concurrency concepts.  
• Working knowledge of Git and proficiency with at least one build server: Jenkins/Travis/Bamboo.
• Good to have a telecom background

Job Description :

- Should have handson experience of more than 1+ years

- Good knowledge of NodeJS, ExpressJS or Restify

- Should have good knowledge of JavaScript.

- Experience implementing frontend using Angular 2+.

- Any database knowledge (SQL.Mongo or NoSQL)

- Basic understanding of version control using GIT

- TypeScript knowledge would be a plus

- Should have good logical skills.

CTC - 12 to 14 LPA

Experience - 3+ Years

Skills:

• Mandatory experience on Angular 2+
• Hands-on experience on MEAN stack
• Proficient with OOPS and design patterns
• Frontend using Angular 2+/ReactJS/VueJS
• Backend using NodeJS (ExpressJS/SailsJS)/Python/Java
• Good understanding of NoSQL & SQL databases
• HTML, CSS(Knowledge of web semantics, CSS Pre-processors preferable)
• Should be able to translate design to HTML, CSS Git

Good to have:

Mobile app experience using react-native, flutter, etc

AWS/Azure/GCP

Experience:

3+ years

At least one application in production