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.

Required Skills & Qualifications

• Proven experience as an ERP Developer / ERP Technical Consultant
• Strong knowledge of ERP platforms (e.g., Odoo, SAP, Oracle NetSuite, Microsoft Dynamics, Tally ERP, or custom ERP)
• Proficiency in backend languages (Node.js, Python, Java, or PHP depending on ERP platform)
• Solid understanding of databases (MySQL, PostgreSQL, MongoDB, or SQL Server)
• Experience with API development and integration (REST, SOAP, GraphQL)
• Familiarity with front-end frameworks (React, Angular, or Vue.js)
• Strong knowledge of business processes (finance, HR, payroll, sales, inventory, supply chain)
• Hands-on experience in custom module development and ERP reporting
• Proficient in Git/version control and CI/CD practices
• Excellent problem-solving, analytical, and debugging skills

Preferred Qualifications

• Experience in Odoo, Oracle, or Microsoft Dynamics 365 ERP
• Knowledge of cloud platforms (AWS, Azure, GCP) for ERP deployment
• Familiarity with DevOps tools and automation
• Prior experience in manufacturing, construction, or service industry ERPs
• Strong documentation and communication skills

Role Overview

We are seeking a proficient Full Stack Developer with expertise in Java and React.js / Angular to join our dynamic team. The ideal candidate will be responsible for developing and maintaining scalable web applications, ensuring seamless integration between front-end and back-end systems.

Key Responsibilities

• Develop and maintain web applications using Java (Spring Boot) and React.js/ Angular.
• Design and implement RESTful APIs and microservices.
• Collaborate with cross-functional teams to define and deliver new features.
• Ensure application performance, scalability, and security.
• Participate in code reviews and maintain code quality standards.

Required Skills

• Strong proficiency in Java, Spring Boot, and React.js / Angular.
• Experience with RESTful APIs and microservices architecture.
• Familiarity with HTML, CSS, JavaScript, and modern front-end frameworks.
• Knowledge of version control systems like Git.
• Understanding of Agile development methodologies.

Position: Architect (Typescript and JavaScript)

Experience: 10 Years

Location: Remote, India.

Immediate joiners are preferred.

Roles and Responsibilities:

* Architectural Support: the design, documentation and architecture of scalable software solutions using TypeScript and related technologies.

* Stakeholder Engagement: Collaborate with stakeholders to identify and define project requirements, translating them into technical specifications.

* Development Oversight: Engage in hands-on development, focusing on both new feature implementation and maintaining existing applications (50% development).

* Team Collaboration: Work closely with our development team to provide architectural guidance and ensure best practices are followed.

* Support and Mentorship: Mentor and support other development teams by providing architectural guidance and troubleshooting assistance (50% support).

* API Development: Create and optimize GraphQL APIs

* Code Quality: Write clean, maintainable code following best practices, including unit testing and code reviews.

* Troubleshooting: Debug and troubleshoot issues in existing applications to improve performance and reliability.

* Documentation: Maintain comprehensive documentation of code and processes.

* Collaboration: Work with cross-functional teams to ensure alignment and understanding of project requirements.

* AWS Integration: Utilize AWS services (e.g., Lambda, S3) for application deployment and management.

* Messaging Services: Experience with Kafka or other messaging services for event-driven architectures and data streaming.

* Continuous Improvement: Stay updated with emerging technologies and participate in team knowledge sharing.

Skills & Qualifications:

* 10+ years of experience in software development, with a strong focus on architecture and design.

* Proven experience in leading development teams and architectural design.

* Strong knowledge of JavaScript and TypeScript.

* Experience with RESTful APIs and GraphQL.

* Proficiency in AWS services and cloud-based development.

* Understanding of version control systems (e.g., Git) and collaborative workflows.

* Strong problem-solving skills and attention to detail.

* Excellent communication skills, capable of explaining technical concepts clearly.

* Familiarity with agile methodologies and the software development lifecycle.

* BA/BS in Computer Science, Engineering, or a related field.

Role: Software Engineer (Integration)

Work Experience: Min. 2 years

About the Role

We are seeking a versatile Software Engineer (Integration) who thrives on solving complex technical challenges and connecting disparate systems with elegance and efficiency.

Responsibilities

●       Design, develop, and maintain robust integration solutions between multiple systems

●       Create scalable endpoints and implement efficient Cron jobs

●       Develop and optimize integration scripts using Python and JavaScript

●       Interface with legacy and modern systems, including SOAP and REST APIs

●       Perform comprehensive system mapping and data transformation

●       Architect solutions that bridge different technological ecosystems

●       Collaborate across teams to ensure seamless system interoperability

Technical Skills Requirement

1.   Programming Languages:

●       Expert-level JavaScript and TypeScript

●       Python scripting capabilities

●       Working knowledge of React

2.   Technical Expertise:

●       Backend development proficiency

●       SQL and NoSQL database integration

●       REST and SOAP API implementation

●       Endpoint design and optimization

●       System integration architecture

Soft Skills Requirements:

●       Exceptional problem-solving abilities

●       Strong client communication skills

●       Ability to ask precise, targeted technical questions

●       Adaptable and quick-learning approach

●       Detail-oriented with a holistic system understanding

Educational Qualifications:

●       Bachelor's degree in Computer Science, or a related field

●       2-5 years of professional experience

●       Proven track record of successfully connecting complex systems

●       Demonstrated ability to work across technological boundaries

Employment Type: Full-time

Work days: 5 days a week

Location: Udyog Vihar, Gurgaon

mavQ is seeking a motivated Lead FullStack Developer to join our team. You will be an integral member of the Professional Services team dedicated to work on the recently acquired mavQ’s Electronic Research Administration products built on a REST based Java platform running in Tomcat. The work is about 70% implementation and new development and 30% maintenance.

Skills Required:

• At least 7 years of experience with Frontend and Backend Technologies.
• Experience in Java, Spring, API Integration, Angular, Frontend Development.
• Ability to work with caching systems such as Redis.
• Good understanding of cloud computing & Distributed systems.
• Experience in people management.
• Capability of working within a budget of hours and completing projects by a deadline to appropriate quality standards
• Communicate clearly and ask clarification questions, dig deeper.
• Ability to work from visual and functional specifications
• Work with a positive attitude even when circumstances may be unfavorable
• Understand RESTful APIs, MVC concepts, and how to effectively use SVC systems
• Ability to work effectively in a team of developers and representatives of other functional groups, such as design
• ​​Good Experience in CI/CD, Kubernetes, Test suits, Docker.
• Good Understanding of the Command line.
• Good with client Interaction.

Roles & Responsibilities:

• Effective Problem Solving Skills. Assist the team with debugging & guidance when needed.
• Responsible for managing a team of 8-10 developers.
• Lead the product’s technical domain with full authority.
• Assist the product & project management teams with setting timelines & priorities for feature development.
• Drive good coding standards & development practices in the team. 
• Own the code review process for the team & ensure high quality work.
• Assist with system & architecture design & research into new technologies.
• Be involved with client communications when needed from a product sales perspective. 

What we offer:

• Group Medical Insurance (Family Floater Plan - Self + Spouse + 2 Dependent Children)
• Sum Insured: INR 5,00,000/- 
• Maternity cover upto two children
• Inclusive of COVID-19 Coverage
• Cashless & Reimbursement facility
• Access to free online doctor consultation

• Personal Accident Policy (Disability Insurance) -

• Sum Insured: INR. 25,00,000/- Per Employee
• Accidental Death and Permanent Total Disability is covered up to 100% of Sum Insured
• Permanent Partial Disability is covered as per the scale of benefits decided by the Insurer
• Temporary Total Disability is covered

• An option of Paytm Food Wallet (up to Rs. 2500) as a tax saver  benefit
• Monthly Internet Reimbursement of upto Rs. 1,000 
• Opportunity to pursue Executive Programs/ courses at top universities globally
• Professional Development opportunities through various MTX sponsored certifications on multiple technology stacks including Salesforce, Google Cloud, Amazon & others

***

Tech CoFounder wanted for our startup. We're building a TikTok of dashcam type videos to allow users to capture interesting scenes or moments from across more than 6 crore kms of roads globally. This solution can have a lot of Connected Mobility potential at the back.

It's a short videos app meant for dashcam style videos getting recorded but from the user's smartphone (placed on a holder in a car or on a bike or in the users hands as well)

The individual should have knowledge of Full stack mobile app development preferably in Kotlin and MEAN stack along with the ability to deploy things on cloud (AWS) A plus point if he OR she knows about iOS app development as well. Bigger plus point will be the ability to move quickly with regards to developing and rolling out features for users at lightening speed.

*Salary mentioned is the salary we both can draw once the initial set of investors come on board and we can raise north of US$ 100k in the first round. You will be entitled to 30-35% equity in exchange of your initial tech development efforts.

Salaries will obviously go up as we raise more rounds and so will the value of our equity go up during each fund raise.

We are looking for a Full Stack Developer to produce scalable software solutions. You’ll be part of a cross-functional team that’s responsible for the full software development life cycle, from conception to deployment.

As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks, and third-party libraries. You should also be a team player with a knack for visual design and utility.

• Design client-side and server-side architecture
• Build the front-end of applications through appealing visual design
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
• Work with data scientists and analysts to improve software

• Proven experience as a Full Stack Developer or similar role
• Familiarity with common stacks
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Knowledge of multiple back-end languages (e.g. NodeJs, Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• Degree in Computer Science, Statistics or relevant fiel

𝐖𝐡𝐚𝐭 𝐜𝐚𝐧 𝐲𝐨𝐮 𝐞𝐱𝐩𝐞𝐜𝐭?

You will be part of the founding team at LDU and will be responsible for the end-to-end technology of the company including:

- Formulate long-term technology & product strategy along with implementation roadmap, while envisioning the tech-stack required to scale the business 100X

- Architecting and engineering solutions across the entire technology stack including front-end, back-end, infrastructure, architecture, server-side engineering, UI, etc. in line with the company's strategy.

- Plan and collaborate with the other teams including marketing/ growth, customer success/ sales, design, operations, etc. to implement new product features, growth hacks/ initiatives identified through user interviews/ insights, etc in a timely manner.

- Build processes/mechanisms to track the KPIs across product/ technology and ensure religious execution of the targets

- Build and lead the technology team including the engineering team, product team, Quality Assurance, etc.

- Awesome work-culture (flexible work timings; no need to wear formals; awesome snacks to name a few)

𝐖𝐡𝐚𝐭 𝐚𝐫𝐞 𝐰𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫?

We are looking to onboard a Senior Software Engineer, who has a founder's mindset including the following traits:

- Experience of full stack development across web & mobile based technologies and should have scaled a business 

- Ability to build scalable products/ platforms, fully redundant fault-tolerant infrastructure while working on modern technologies.

- Stronghold in both front-end & back-end development/ algorithms with experience of building agile, highly scalable, data-driven platforms from scratch

- Ability to be hands-on with coding across big data, mobile apps, AI & ML, analytics, DevOps, business intelligent solutions, etc. apart from strategically guiding/ mentoring the team

- Ability to manage end-to-end delivery of large-scale initiatives from concept, scope, planning, estimation, project management, and deployment.

- Stronghold in executing stuff on the ground and hustle around to “Get things done”

- Ability to think and see the big picture while focusing on short term goals and deliverables

- Leadership qualities to hire and build a kick-ass technology/ product team going forward

- Experience as a founder/ being part of founding team is huge plus but not mandatory

- Experience in the Fashion/ Apparel industry is a plus but not mandatory

𝐀𝐛𝐨𝐮𝐭 𝐋𝐃𝐔:

- LDU is has been selected as one of the top 17 startups (amongst 1200+ startups in South-East Asia) by Lightspeed Venture Partners, one of the top VCs in the world. We are building India’s version of Stitch Fix – Personalized clothing (your size, your style) at Scale. We personalize the user experience by building a Designer layer for the user through technology. Also, we leverage technology to aggregate the highly unorganized and broken supply side of tailor-units/ boutiques/ small manufacturers etc.

- LDU is a pre-series A start-up and has closed two rounds of funding. We are backed by India's top VC and angels.

𝐅𝐀𝐐

- Full time role.

- Location: Gurgaon

- CTC : INR 24 Lacs (with hansome Esops/ Equity)

- Experience: Preferably 2-5 years