Senior Application 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: Python Full Stack Developer

Onsite- Bengaluru

Experience: 3+ Years

Contract Duration: 6 Months

Notice0 less than 15 days

Job Title - MERN Stack Developer

Experience Range – 3 to 6 Years

Location- Mumbai (Andheri East)

Mode- 5 Days working from office

Some specific Requirements:

• You have prior experience developing and working on consumer-facing web/app products
• Hands-on experience in JavaScript. Exceptions can be made if you’re really good at any other language with experience in building web/app-based tech products
• Expertise in Node.JS and Experience in at least one of the following frameworks - Express.js, Koa.js, Socket.io .
• Good knowledge of async programming using Callbacks, Promises, and Async/Await
• Hands-on experience with Frontend codebases using HTML, CSS, and AJAX
• Working knowledge of MongoDB, Redis, MySQL
• Good understanding of Data Structures, Algorithms, and Operating Systems
• You've worked with AWS services in the past and have experience with EC2, ELB, AutoScaling, CloudFront, S3
• Experience with Frontend Stack would be added advantage (HTML, CSS)
• You might not have experience with all the tools that we use but you can learn those given the guidance and resources
• Experience in Vue.js would be plus

• Hands-on experience with PHP and frameworks like Laravel, Codeigniter.
• Thorough understanding of React and its core principles.
• Good with JQUERY.
• Database design for scalable and secure system using NoSQL (MongoDB) or RDBMS (MySQL or
• PostgreSQL)
• POC development with other engineers
• Writing Unit testing for a robust system

Position: Founding Engineer (SDE)

Location: Remote

Do you have a passion for developing cutting-edge software? Do you thrive in the innovative atmosphere of a startup? If coding is your art, and you have the prowess to turn problems into sophisticated solutions, then we're looking for you!

We are an early-stage startup working on re-defining how businesses in India approach accounting.

The Role:

• Dive deep into coding challenges, transforming ideas into groundbreaking software solutions.
• Play a pivotal role in our startup's journey, working closely with a dynamic team to develop the next big thing.
• See the immediate impact of your work in a rapidly-growing company.
• 
  

What We're Looking For:

• Experience: Minimum 2 years in software development.
• Problem Solvers: Ability to take on a challenge, break it down, and deliver an end-to-end solution.
• Team Player: Collaborative mindset to work seamlessly with cross-functional teams.
• Fast Learner: Adaptability in a rapidly changing environment

Nice to Have:

• Victories in hackathons or coding challenges, showcasing your ability to innovate under pressure.

Why Join Us?

• Be at the forefront of our exciting journey, where your contributions directly shape our success.
• Collaborative and open culture – your insights and expertise won't just be appreciated; they'll be celebrated!
• Opportunities for rapid growth, professional development, and unique challenges.
• Competitive, class-leading compensation

CTC: 25-40LPA based on experience

Job Description

We are looking for an excellent experienced person in the Full-Stack field. Be a part of a vibrant, rapidly growing tech enterprise with a great working environment. As a Full-Stack developer, you will be responsible for the server side of our web applications and you will work closely with our engineers to ensure system consistency and improve your experience. A Full Stack MEAN (MongoDB, Express.js, AngularJS, Node.js) Developer is responsible for developing and maintaining web applications, databases, and server-side systems using the MEAN stack.

Scope of Work:

• Translate Understanding of accessibility and security compliance (Depending on the specific project) 
• User authentication and authorization between multiple systems, servers, and environments. 
• Integration of multiple data sources and databases into one system 
• Understanding fundamental design principles behind a scalable application. 
• Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform. 
• Creating database schemas that represent and support business processes. 
• Implementing automated testing platforms and unit tests. 
• Ability to work independently and in a team environment 
• Excellent communication and collaboration skills 
• Participate in code reviews and contribute to the team-wide coding standard

Essential Requirements:

• Developing and managing databases using MongoDB, MY SQL, PostgreSQL 
• Developing and designing web applications using Angular4+, Node.js, and Express.js 
• Excellent Knowledge of AWS/GCP – Managed service.
• Familiarity with cloud computing services such as AWS, Google Cloud, or Azure 
• Writing server-side scripts using Node.js. 
• Integrating front-end components with back-end components. 
• Troubleshooting and debugging applications. 
• Optimizing web applications for speed and scalability. 
• Collaborating with cross-functional teams to identify and resolve issues. 
• Good Knowledge of JSON, API, and JWT 
• Good understanding of server-side templating languages 
• Basic understanding of front-end technologies, such as HTML5 and CSS3 
• Proficient understanding of code versioning tools, such as Git 
• Experience of working in an automated environment

Educational Qualifications

• B-Tech-IT/M-Tech -/MBA- IT/ BCA /MCA or any degree in the relevant field
• 
  

Benefits

- 5 Day Working(Saturday and Sunday Off)

- Informal Dress Code

- Compensatory Off

- Laptop Allowance

- Friendly Working Environment

Please Note: This is a work from office, full-time opportunity, please apply only if you can come to the office full time.

​

• 6-13 years’ experience designing for high performing digital products across various domains
• Degree in design-related field or equivalent experience.
• Good understanding of design patterns, industry trends, and great approaches to solve problems
• Expertise in core UX disciplines including information architecture, interaction design, application of design systems, and UI design.
• Creative problem-solver with a strong eye for detail
• Experience and understanding of Responsive Web Design
• Experience with iOS and Android Mobile App Design
• Must have Software Proficiency with Figma, Sketch, Miro
• Proficient in wire-framing and comfortable producing concept sketches and user flows
• A passion for UX and User Research
• A strong portfolio which demonstrates work across a range of clients
• Strong experience of user research and usability testing
• Passionate about Design Thinking.
• Excellent verbal and written communications skills.
• Experience with accessibility, localization, and internationalization.
• Experience working directly with developers to ensure the successful implementation of a design specifications
• Familiarity with content strategy, content management, taxonomy and large scale digital publishing.
• Knowledge of HTML, CSS, and JavaScript.
• Knowledge with QA and testing methods is a plus.
• All candidates will be required to submit a portfolio of work samples and/or links to their work.

B.E. (Computers) or equivalent candidate is required for this profile along with expertise In Java/ PHP Programming. We are looking for a thoughtful Java/ PHP Developer. Must have strong fundamentals. You will be joining the core team of a rapidly expanding company focusing on making Google Workspace- Cloud Telephony products. We are generally agnostic of language, technology or tools; we use whatever fits the bill best. However, we emphasize a lot on clean abstractions of code, loosely coupled services and good coding practices. You must possess the ability to work on projects without detailed instructions; being a self-starter and taking ownership is a crucial requirement for this role. Good Communication Skill is essential.

Responsibilities:

• Design and build applications on Java/ PHP
• Code review 
• Guide team members 
• Keeping the code optimized and readable.
• Coordination with team members and customer
• Coding, Bug fixes and unit testing
• Coordination with team members and customer

Who Should apply 

1. Candidate should have  2-4 year of work experience  
2. PHP/ Java Developer
3. Having Good Communication Skills

Specific Skill Sets:

• We are looking for a candidate who can work flexibly
• Experience in working on any one of the MVC architectural pattern : Codeigniter / Laravel / Yii/ Struts 2 would be an added advantage 
• Know your way around HTML, HTML5, CSS, CSS3, PHPScript, JQuery and frontend frameworks (such as Ember.js, React.js)
• Must have built SOAP / REST APIs / backends
• Knowledge of APIs and platform capabilities
• Past experience of shipping mobile products (live apps in Play Store a huge plus).
• Expertise in working on multi­threaded apps, XML & JSON, and web services. 
• Should be very strong in Computer Science fundamentals (such as threads, virtual memory, process stacks etc.)
• Should have worked on different data stores (RDBMS, No-SQL) and know when to use what, how to scale them etc.
• Ability to work on projects without detailed instructions; being a self­starter and taking ownership is a crucial requirement for this role.
• Good communication skills is an essential advantage for collaborating with customers and the team.