Senior MERN Stack Developer

Job description

Opportunity to work on cutting-edge tech pieces & build from scratch

Ensure seamless performance while handling large volumes of data without system slowdowns

Collaborate with cross-functional teams to meet business goals

Required Skills:

Frontend: ReactJS (Next.js must)

Backend: Exp in Node.js, Python, or Java

Databases: SQL (must), MongoDB (nice to have)

Caching & Messaging: Redis, Kafka, or Cassandra exp

Cloud certification is a bonus

Mira is building the foundational trust and verification layer for agentic commerce - the emerging landscape where autonomous AI agents interact, transact, and deliver value across modern digital systems. Our work extends into next-generation consumer finance, blending intelligent automation, verifiable execution, and new forms of digital value movement.

We operate as a senior, high-caliber engineering team that ships foundational infrastructure for intelligent consumer experiences, where correctness, reliability, and clarity of execution matter deeply.

We are building a consumer-facing financial product at Mira.

Think crypto-native neobank + agentic automation, where large parts of money movement, compliance, and execution are stitched together via existing providers - but orchestrated with strong guarantees, clear invariants, and excellent user experience.

This is a 0 to 1 product. Architecture decisions made early will compound for years.

We’re looking for a Lead Architect / Lead Full-Stack Engineer to act as a technical owner for this product.

You will define and build the core product architecture across backend, integrations, and frontend surfaces. This role is not about inventing new primitives - it’s about correctly and safely stitching together high-risk systems (money movement, KYC, wallets, verification, agent flows) into a coherent, scalable product.

You’ll work closely with product leadership to shape the technical direction, while staying deeply hands-on in production code and also support in building and leading the technical team.

WHAT YOU WILL DO:

Your primary responsibility is to design, build, and own the core full-stack system end to end.

Specifically, you will:

• Architect and implement backend systems for correctness-critical workflows, including ledgers, balances, transaction state, and orchestration logic.
• Design and build integration-heavy systems, stitching together KYC, wallet providers, verification services, vaults, and external financial APIs.
• Own system invariants and failure modes: ensuring money movement, retries, reconciliation, and edge cases behave safely under stress.
• Build and evolve agentic automation flows that coordinate execution across multiple systems while remaining observable and debuggable.
• Develop core frontend surfaces (web, admin, internal tools) and collaborate closely with React Native engineers for the consumer app.
• Set up and maintain DevOps foundations: environments, CI/CD, monitoring, alerts, and operational playbooks.
• Act as a technical decision-maker and mentor, raising the bar for system design, code quality, and reliability across the team.
• Collaborate with the broader engineering and product team on shared primitives around verification, correctness, and trust.

WHAT YOU BRING:

You are a senior engineer who has built and owned real systems where failure is expensive.

You likely have:

• 5–8+ years of full-stack engineering experience, with strong depth on the backend.
• Prior experience in consumer fintech, payments, wallets, or financial infrastructure, where ledgers and state correctness mattered.
• Deep experience with schema design, data modeling, consistency models, and fault-tolerant systems.
• Strong systems thinking: you naturally reason about invariants, race conditions, retries, idempotency, and data integrity.
• Hands-on experience integrating and operating third-party APIs in production (KYC, payments, identity, compliance, etc.).
• Solid DevOps instincts - comfortable owning deployments, infra decisions, and operational reliability.
• Frontend experience with modern JS/TypeScript frameworks (React); enough to build and reason about product UX, even if you’re backend-leaning.
• Comfort operating in ambiguity and 0→1 environments, where the problem is still being shaped alongside the solution.
• A strong sense of ownership - you don’t wait for specs; you help define them.

NICE TO HAVE:

• Experience working with crypto or blockchain-adjacent systems, even if via integrations rather than protocol design.
• Familiarity with React Native or close collaboration with mobile teams.
• Prior work building consumer-scale systems or financial-grade infrastructure.
• Prior exposure to agent-like workflows, automation engines, or distributed orchestration systems.

WHY THIS ROLE MATTERS:

This is a keystone hire.

The person in this role will:

• Shape how money moves through the system
• Define early architectural patterns
• Prevent painful rewrites later by getting fundamentals right now

If you enjoy building serious systems with real-world consequences - and want to operate at founder-level ownership inside a small, elite team - this role will stretch and reward you.

WHAT WE OFFER:

• Competitive compensation.
• High ownership and the opportunity to shape product direction.
• Direct impact on foundational cryptographic and blockchain infrastructure.
• A collaborative team that values clarity, autonomy, and velocity.

Note: This role can be remote; however Bengaluru or Mumbai candidates will be prioritized.

Job Summary:

As a MERN Stack Developer, you will be responsible for designing, developing, and maintaining robust full-stack applications using MongoDB, Express.js, React.js, and Node.js. With 5+ years of experience, you’ll work closely with cross-functional teams to deliver secure, performant, and user-friendly solutions.

Key Responsibilities:

• Build end-to-end web applications using the MERN stack
• Write clean, maintainable, and efficient code
• Integrate RESTful APIs and third-party services
• Optimize applications for maximum performance and scalability
• Collaborate with product, QA, and DevOps teams throughout the SDLC
• Participate in code reviews, troubleshooting, and improvement initiatives

Required Skills & Qualifications:

• 5+ years of experience in full-stack development with MongoDB, Express, React, and Node.js
• Strong JavaScript/TypeScript skills (ES6+)
• Solid understanding of RESTful APIs, MVC architecture, and microservices
• Experience with Git and Agile methodologies
• Familiarity with responsive UI/UX best practices

Preferred Skills:

• Exposure to cloud platforms like AWS or Azure
• Experience with CI/CD pipelines and testing frameworks like Jest or Mocha
• Familiarity with containerization tools like Docker/Kubernetes

We are seeking a skilled Senior Software Development Engineer (SDE-3) proficient in MERN stack technologies to join our dynamic team.

Responsibilities:

• Design, develop, and maintain scalable web applications and services using MERN stack technologies (MongoDB, Express.js, React.js, Node.js) and Nest.js.
• Implement frontend components and user interfaces using React.js and Next.js.
• Develop and integrate server-side logic using Node.js, Express.js, and Nest.js.
• Utilize MongoDB and SQL databases to manage and optimize data storage solutions.
• Implement real-time communication and event-driven architectures using technologies like Socket.io.
• Deploy applications on AWS cloud infrastructure, leveraging services such as EC2, S3, Lambda, DynamoDB, and others as required.
• Ensure code quality, performance, and adherence to best practices through code reviews and automated tests.
• Collaborate effectively with cross-functional teams including product managers, designers, and other developers.
• Stay updated with emerging technologies and industry trends to continuously improve development practices and tools.

Requirements:

• Bachelor’s degree in Computer Science, Engineering, or a related field (preferred).
• 5+ years of experience in software development with expertise in MERN stack technologies.
• Proficiency in Node.js, Next.js, React.js, Express.js, Nest.js, JavaScript, and TypeScript.
• Strong understanding of MongoDB and SQL databases, including database design and optimization.
• Experience building and deploying applications on AWS cloud infrastructure (EC2, S3, Lambda, DynamoDB).
• Familiarity with real-time web applications and event-driven architectures using technologies like Socket.io.
• Solid understanding of software development principles, design patterns, and best practices.
• Excellent problem-solving skills and ability to troubleshoot complex issues.
• Effective communication and collaboration skills, with the ability to work both independently and as part of a team in a fast-paced environment.

•  Strong analytical and problem-solving skills
•  Ability to work independently, learn quickly and be proactive
•  10-14 years of hands-on experience working on Web Full Stack technologies, with at least 4-6 years of experience developing applications with/on React/NextJS, NoSQL, REST APIs
•  Proficiency in JavaScript/TypeDcript (ES6), NodeJS, HTML5, CSS3, CSS Preprocessors, Webpack, Gulp
•  Client-side scripting and JavaScript frameworks – jQUery, ReactJS, Redux, Babel, JSX
•  Experience in designing high-performance REST APIs and associated data structures
•  Familiarity with developing microservices using containerization technologies such as docker, Kubernetes, etc.
•  Working knowledge of git and using branches for development

What you need to have:

• Strong architecture and design skills and keen business sense. -
• Ownership of projects and technical areas. -
• Strong core server-side technologies experience (Java), database design & performance tuning exposure. -
• Strong OO design skills, knowledge of frameworks such as Spring/ Spring Boot/ exposure to functional programming a plus. -
• Good knowledge of nodeJS/ noSQL a definite plus. -
• Good exposure to front end/UI skills (JS, HTML, Angular). -
• Good exposure to configuration management, testing, deployment. -
• Deep knowhow of data structures, algorithms. -
• Hands on development across technologies.
• Exp- 6-8 years.
• Qual- B.E/ B.Tech (Computer Science/ Equivalent) from a premier institute.

We are the fastest growing SAAS platform in our segment. With offices in USA, UAE and INDIA we are focused on exponential growth over the next couple of years and we need rockstar team members who want to be part of this journey. We have over 12 positions open in tech such as Front end, Back end, Fullstack - MERN , UI/UX, ML and a lot more. 

Full Stack Developer 2+ yrs exp mandatory

Responsibilities:

• Architecting and developing backend web applications / APIs
• Backend integration with SQL/No-SQL databases, and other external services/APIs
• Integration of web application frontend and backend
• End-to-end performance and optimisation of the web/mobile application
• Frontend development of UI/UX using latest technologies and best practices
• Integrating external services to frontend for various needs
• Work with QA team to ensure test coverage and execution
• Create and automate unit test cases and conduct regular code reviews
• Work with business team to ensure application meets requirements and expectations of external and internal clients
• Work effectively in Agile environment
• Provide estimates and create user stories as part of agile methodology
• Work effectively with other members of same and external teams
• Work on multiple projects at the same time if need be

Requirements:

• Expertise in JavaScript based frontend and backend frameworks (MERN preferred)
• Expertise in AWS
• Expertise in developing full-stack JavaScript systems
• Experience in creating REST APIs
• Proficiency in working with Open source technologies is a plus
• Expertise in developing modern fluid web interfaces with latest technologies
• Experience with developing hybrid mobile apps
• Self-motivated and can work without much supervision
• Works well independently as well as in team environment
• Strong problem solving and analytical skills
• Excellent communication and interpersonal skills
• Experience working with international clients preferred
• Experience working with Git
• Experience with working on real time systems
• Experience working with SQL and non-SQL database systems
• Full Stack Development: 3 years + required