React or Rails Developer

Senior Full Stack Developer

About the Role :

Were looking for a skilled Full Stack Engineer (5-10 years of experience) who can design and build scalable web applications, own end-to-end features, and contribute to the technology powering Indias fastest-growing jewelry platform.

Youll work closely with product and design teams to bring seamless user experiences to life while ensuring robust backend systems.

Key Responsibilities :

- Design, develop, and maintain scalable web applications and APIs.

- Work across the stack - from front-end interfaces to backend logic and database layers.

- Collaborate with product managers and designers to translate requirements into high-quality code.

- Optimize application performance, security, and scalability.

- Drive code quality via reviews, best practices, and mentoring junior engineers.

- Improve system performance and reliability with monitoring, testing, and CI/CD practices.

- Contribute to architectural decisions and technology choices as the platform scales.

- Stay hands-on with coding while helping guide the technical direction of the team.

Qualifications :

- 5 - 8 years of professional experience as a Full Stack Developer.

- Strong expertise in JavaScript/TypeScript, with experience in frameworks like React.js or Next.js.

- Solid experience with Python (Django, FastAPI, or Flask).

- Solid understanding of relational databases (schema design, query optimization).

- Experience building and consuming REST/GraphQL APIs.

- Familiarity with Docker and containerized deployments.

- Hands-on experience with cloud platforms (AWS preferred).

- Understanding of microservices architecture.

- Knowledge of DevOps practices (CI/CD pipelines, monitoring, observability).

- Strong understanding of web performance, scalability, and security best practices.

- Excellent problem-solving, debugging, and optimization skills.

- Strong communication skills and ability to mentor other engineers.

Nice to Have :

- Background in Statistics, Computer Science, Economics, or related field.

- Exposure to Python or R for advanced analytics.

Whats in It for You :

- High ownership role in a fast-paced environment.

- Opportunity to work closely with the founding team and passionate professionals.

- Competitive salary with fast career growth and appraisals.

- Dynamic, collaborative, and politics-free work environment.

- Health insurance coverage.

Additional Details :

- Early-stage startup environment where achievements require effort, dedication, and passion.

- 6-day work week.

- Location : HSR Layout, Bangalore.

Why This Role Matters

We’re looking for a Principal Engineer to lead the architecture and execution of our GenAI-powered, self-serve marketing platforms. You will work directly with the CEO to shape, build, and scale products that change how marketers interact with data and AI. This is intrapreneurship in action — not a sandbox innovation lab, but a real-world product with traction, velocity, and high stakes.

What You'll Do

• Co-own product architecture and direction alongside the CEO.
• Build GenAI-native, full-stack platforms from MVP to scale — powered by LLMs, agents, and predictive AI.
• Own the full stack: React (frontend), Node.js/Python (backend), GCP (infra), BigQuery (data), and vector databases (AI).
• Lead a lean, high-caliber team with a hands-on, unblock-and-coach mindset.
• Drive rapid iteration with rigor, balancing short-term delivery with long-term resilience.
• Ensure scalability, observability, and fault tolerance in multi-tenant, cloud-native environments.
• Bridge business and tech — aligning execution with evolving user and market insights.

What You Bring

• 8–12 years of experience building and scaling full-stack, data-heavy or AI-driven products.
• Fluency in React, Node.js, and Google Cloud (Functions, BigQuery, Cloud SQL, Airflow, etc.).
• Hands-on experience with GenAI tools (LangChain, OpenAI APIs, LlamaIndex) is a bonus.
• Track record of shipping products from ambiguity to impact.
• Strong product mindset — your goal is user value, not just elegant code.
• Architectural leadership with ownership of engineering rigor and scaling best practices.
• Startup or founder DNA — you’ve built things from scratch and know how to move fast without breaking things.

Who You Are

• A former founder, senior IC, or tech lead who’s done zero-to-one and 1-to-n scaling.
• Hungry for ownership and velocity — frustrated by bureaucracy or stagnation.
• You code because you care about solving real problems for real users.
• You’re pragmatic, hands-on, and grounded in first principles.
• You understand that great software isn't just shipped — it's hardened, maintained, and evolves with minimal manual effort.
• You’re open to evolving into a founding engineer role with influence over the tech vision and culture.

What You Get

• Equity in a high-growth product-led startup.
• A chance to build global products out of India with full-stack and GenAI innovation.
• Access to high-context decision-making and direct collaboration with the CEO.
• A tight, ego-free team and a culture that values clarity, ownership, learning, and candor.

Why YOptima?

YOptima is redefining how leading marketers unlock growth through full-funnel, AI-powered media solutions. As part of our growth journey, this is your opportunity to own the growth charter for leading brands and agencies globally and shape the narrative of a next-generation marketing platform.

Ready to lead, build, and scale?

We’d love to hear from you.

• Past experience in working with any product start-up is a plus.
• Proficiency in fundamental front end languages such as HTML, CSS, and JavaScript.
• Familiarity with JavaScript frameworks such as Angular JS, React, and others.
• Knowledge of Node.js and frameworks available for it such as Express (recommended).
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Understanding of REST Services.
• Experience with Redis.
• Familiarity with database technology such as MySQL, MongoDB and Elasticsearch.
• Proficient understanding of serverless programming.
• Proficient understanding of code versioning tools, such as Git.
• Good problem-solving skills.
• Attention to detail.

Candidates serving notice period & immediately available can apply, should join within 7 days  Urgent requirement

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Responsibilities

• Design and develop REST-based web services utilizing Java micro services web frameworks (Spring Boot)
• Apply design principles and patterns in creating enterprise level solutions, as needed
• Perform web services tuning and performance testing
• Implement unit tests as needed
• Support front-end developers in leveraging web services
• Automate/script common developer tasks, continually optimize personal and team workflows
• Infrastructure setup and configuration
• Engage in code review and feedback process
• Take a feature from inception to completion independently across the stack
• Collaborate with teammates on proposed UX/UI and provide feedback as needed
• Participate in and support the entire SDLC processes

Requirements

• Spring Boot, Spring Security, Spring JPA & Hibernate
• Relational data modelling concepts and experience in PostgreSQL, MySQL, or similar
• Adopted opinionated RESTful web services design patterns
• Microservices-based application architecture
• Application containerization technologies, including Docker, Kubernetes, and cloud-vendor implementations (AWS, Azure, other)
• Other modern technologies relevant to the technology stack defined here
• Javascript ES6 or later
• React
• Git

We are looking for a Senior Full Stack Rails Web developer with good communication skills. The Candidate MUST have good communication skills and should be comfortable taking Phone/Video calls with US employees.

Please see below the technical skillset required:

• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Strong Proficiency in HTML/CSS and experience with Bootstrap and FontAwesome
• Thorough understanding of ReactJS and its core principles
• Experience with popular ReactJS workflows (such as Flux and Redux)
• Experience with AngularJS
• Experience with NPM and NodeJS
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Experience with common front-end development tools such as Babel, Webpack, etc.
• Experience with popular frameworks like EmberJS, BackboneJS, KnockoutJS and Vue is a plus.

• Solid understanding of Ruby along with Rails 3, 4 and 5
• Solid understanding of gems like with devise, ActiveAdmin, Clockwork, SideKiq, Ransack
• Proficient with ActionCable, EventMachine, Websocket
• Excellent understanding of Rails query interface and DBMS like Mysql, sqlite, postgreSQL
• Proficient in creating test suites using Cucumber, Capybara, RSpecs, Minitests etc
• Proficient in HTML/CSS/Sass
• Experience in AWS Elastic Beanstalk and Capistrano deployments is a plus
• Experience in creating Ruby programs/scripts to automate tasks is a plus
• Experience with CMS systems like BrowserCMS is a plus

• Exp – 9+ yrs
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization is a solid plus
• Experience in GoLang and/or Rails and desire to work on back-end applications is a solid plus