Freelance full stack developer

Quidcash seeks a versatile full-stack developer to build transformative fintech applications from end to end. You ll leverage Flutter for frontend development and JavaScript/Python for backend systems to create seamless, high-performance solutions for Indian SMEs. This role

blends UI craftsmanship with backend logic, offering the chance to architect responsive web/mobile experiences while integrating financial workflows and AI-driven features. If you excel at turning complex requirements into intuitive interfaces, thrive in full lifecycle development, and are passionate about fintech innovation – join us!

What You’ll Do:

 Full-stack Development:

 Design and build responsive cross-platform applications using Flutter (Dart) for web and mobile native app development.

 Develop robust backend services with JavaScript (Node.js) and Python, applying OOP principles and RESTful/gRPC APIs.

 Integrations:

 Implement secure financial features (e.g., payment processing, dashboards, transaction workflows) with regulatory compliance.

 Connect frontend UIs to backend systems (databases, cloud APIs, AI/ML models).

 System Architecture: Architect scalable solutions using microservices, state management (Provider/Bloc), and cloud patterns (AWS/GCP).

Collaboration & Delivery:

 Partner with product, UX, and QA teams in Agile/Scrum cycles to ship features from concept to production.

Quality & Innovation:

 Enforce testing (unit/widget/integration), CI/CD pipelines, and DevOps practices.

 Explore AI/ML integration for data-driven UI/UX enhancements.

What You’ll Bring (Must-Haves):

Experience:

 3–5 years in full-stack development, including:

 Flutter (Dart) for cross-platform apps (iOS, Android, Web).

 JavaScript (Node.js + React/Express) and Python (Django/Flask).

 Experience with OOP, design patterns, and full SDLC in Agile environments.

Technical Acumen:

 Frontend:

 Flutter (state management, animations, custom widgets).

 HTML/CSS, responsive design, and performance optimization.

 Backend:

Node.js/Python frameworks, API design, and database integration (SQL/NoSQL).

 Tools & Practices:

 Cloud platforms (AWS/GCP/Azure), Docker, CI/CD (Jenkins/GitHub Actions).

 Git, testing suites (Jest/Pytest, Flutter Test), and financial security standards.

Mindset:

 User-centric approach with a passion for intuitive, accessible UI/UX.

 Ability to bridge technical gaps between frontend and backend teams.

 Agile problem-solver thriving in fast-paced fintech environments.

Why Join Quidcash?

 Impact: Play a pivotal role in shaping a product that directly impacts Indian SMEs' business growth.

 Innovation: Work with cutting-edge technologies, including AI/ML, in a forward- thinking environment.

 Growth: Opportunities for professional development and career advancement in a growing company.

 Culture: Be part of a collaborative, supportive, and brilliant team that values every contribution.

 Benefits: Competitive salary, comprehensive benefits package, and be a part of the next fintech evolution.

Full Stack Engineer

We are looking for a self-starter who can join a fast-paced startup environment in order to design and build a scalable cloud-based product. You’ll be part of a cross functional team that’s responsible for the full product development life cycle, from conception to deployment.

Key Responsibilities: -

Work with the development team to design & build new features using Node JS along with enhancing the existing platform. - Develop, test and optimize code for performance, maintainability and standards. - Participate in code reviews and make recommendations. - Use CI/CD techniques to ensure clean working environments and agile deployments. - Debug and troubleshoot cloud-based applications. - Follow Agile development techniques, participate in daily calls and assist product owners in story grooming.

Skill set: -

3+ years of product development experience. - Strong problem-solving and analytical skills. - Strong programming experience in Node JS/Java/Python. - Experience with React JS. - Experience in building cloud-based applications on AWS. - Experience with NoSQL data stores, preferably Dynamo DB. - Experience with any CI / CD tool.

Good to have: - Experience in GraphQ

Job Description

Technical lead who will be responsible for development, managing team(s), monitoring the tasks / sprint. They will also work with BA Persons to gather the new requirements and change request. They will help solve application issues and helping developers when they are stuck.

Responsibilities

·       Design and develop application based on the architecture provided by the solution architects.

·       Help team members and co developers to achieve their tasks.

·       Maintain / monitor the new work items and support issues and have to assign it to the respective developers.

·       Communicate with BA persons and Solution architects for the new requirements and change requests.

·       Resolve any support tickets with the help of your team within service timelines.

·       Manage sprint to achieve the targets.

Technical Skills

·       Microsoft .NET MVC

·       .NET Core 3.1 or greater

·       C#

·       Web API

·       Async Programming, Threading, and tasks

·       Test Driven Development 

·       Strong expert in SQL (Table Design, Programing, Optimization)

·       Azure Functions

·       Azure Storage

·       MongoDB, NoSQL

Qualifications/Skills Desired:

·       Any Bachelor’s degree relevant to Computer Science. MBA or equivalent is a plus

·       Minimum of 8-10 years IT experience and managing a team(s) out of which 4-5 years should be as a technical/team lead.

·       Strong verbal and written communication skills with the ability to adapt to many different personalities and conflict resolution skills required

·       Must have excellent organizational and time management skills with strong attention to detail

·       Confidentiality with privacy-sensitive customer and employee documents

·       Strong work ethic - demonstrate good attitude and judgment, discretion, and maintain high level of confidentiality

·       Previous experience of customer interactions

YOptima is a well capitalized digital startup pioneering full funnel marketing via programmatic media. YOptima is trusted by leading marketers and agencies in India and is expanding its footprint globally.

We are expanding our tech team and looking for a prolific Staff Engineer to lead our tech team as a leader (without necessarily being a people manager). Our tech is hosted on Google cloud and the stack includes React, Node.js, AirFlow, Python, Cloud SQL, BigQuery, TensorFlow.

If you have hands-on experience and passion for building and running scalable cloud-based platforms that change the lives of the customers globally and drive industry leadership, please read on.

1. You have 6+ years of quality experience in building scalable digital products/platforms with experience in full stack development, big data analytics and Devops.
2. You are great at identifying risks and opportunities, and have the depth that comes with willingness and capability to be hands-on. Do you still code? Do you love to code? Do you love to roll up your sleeves and debug things?
3. Do you enjoy going deep into that part of the 'full stack' that you are not an expert of?

Responsibilities:

• You will help build a platform that supports large scale data, with multi-tenancy and near real-time analytics.
• You will lead and mentor a team of data engineers and full stack engineers to build the next generation data-driven marketing platform and solutions.
• You will lead exploring and building new tech and solutions that solve business problems of today and tomorrow.

Qualifications:

• Bachelor’s or Master’s degree in Computer Science or equivalent discipline.
• Excellent computer systems fundamentals, DS/Algorithms and problem solving skills.
• Experience in conceiving, designing, architecting, developing and operating full stack, data-driven platforms using Big data and cloud tech in GCP/AWS environments.

What you get: Opportunity to build a global company. Amazing learning experience. Transparent work culture. Meaningful equity in the business.

At YOptima, we value people who are driven by a higher sense of responsibility, bias for action, transparency, persistence with adaptability, curiosity and humility. We believe that successful people have more failures than average people have attempts. And that success needs the creative mindset to deal with ambiguities when you start, the courage to handle rejections and failure and rise up, and the persistence and humility to iterate and course correct.

1. We look for people who are initiative driven, and not interruption driven. The ones who challenge the status quo with humility and candor.
2. We believe startup managers and leaders are great individual contributors too, and that there is no place for context free leadership.
3. We believe that the curiosity and persistence to learn new skills and nuances, and to apply the smartness in different contexts matter more than just academic knowledge.

Location:

1. Brookefield, Bangalore
2. Jui Nagar, Navi Mumbai

As a Staff Full-stack engineer, you will work across the Acceldata platform products. We’re looking for people with a strong background or inclination towards data engineering and systems; you’re comfortable in dealing with lots of moving pieces and can work at the  intersection of Databases, API's and Frontends

You will:          

• Be actively involved in strategic direction and product decisions.
• Design, build and maintain APIs, user-facing experiences, and services.
• Work closely with our customers and sales teams on a regular basis to carve out new features and use cases
• Work with MVC frameworks such as React or Angular 
• Work with database systems, RDBMS, Mongo, Elastic Search.
• Develop shared front-end components (JavaScript & CSS) for use across all of our products, enabling other UI engineers to build better products faster.

You need:      

• 8+ years of significant of web-application development experience in one or more JS frameworks. You care about building better products.
• Strong Computer Science fundamentals in data structures, algorithm design, and problem-solving.
• You're as comfortable writing plain JavaScript as working with modern frameworks like Angular. You've built your own controls and widgets in JavaScript. 
• You write unit tests for your JavaScript (really, you do). You've probably used Node. You have built complex JS web applications.
• Organized, thorough, and detail-oriented 

Good to have:

• Contribution to open-source projects.
• Background in enterprise software
• JVM performance tuning and debugging

JOB DESCRIPTION

It is an app that allows offline businesses to sell their products and services online. On our app, the users can make beautiful product catalogues (catalogs) right from a smartphone and share with their customers easily on different social media apps such as Whatsapp Business, Whatsapp, Facebook, Instagram etc. Praised by users all over India, thisapp has saved declining businesses by helping them transfer their shop online. The journey has just begun and we are on a mission to make India truly Digital. They are currently powering over 3.7 M ecommerce stores built by indian small businesses

and growing at a crazy rate.

We are looking for a full-stack developer to join our team who will be part of our new innovations team.

Responsibilities:

• Rapidly developing new user-facing features & product prototypes using React.js & Django.

• Will be responsible for new product prototypes, quick feature ideations & rapid response for critical issues

• Work on the their frontend store - Built with react & nextjs.
• Work on their backend - Built with Python Django & DRF
• Collaborate with existing team on our Android apps

Requirements:

• Familiarity with React & Next Js for frontend.
• Proficiency in backend development with Python Django & DRF
• Familiarity with Postgres, Elasticsearch & Mongo.
• Familiarity with Android app development with Native JAVA
• Familiarity with REST APIs architecture & working with third party APIs.

Technical Skills

Front-end:

Mandatory Technical Skills: ReactJS, ES6, Context API, GraphQL, Redux, Payment Gateway
Not Mandatory skills: Redux saga, Gatsby, Git Pipeline, Deployment on Cloud AWS/Azure/Google

Back-end:

Mandatory Technical Skills: NodeJS, ES6, Express, Apollo Server, Send Grid Email, Twilio SMS, Payment Gateway,
Exception Management, Error Loggin, API Developement, API Security, PostGreSQL/MSSQL/MySQL, MongoDB/CouchDB
Not Mandatory: Docker Deployment, Git Pipeline, Auto Deployment, AWS/Azure/Google, NestJS

Job roles and responsibilities

• Design and implement key components of our technical infrastructure, including services supporting payments, lottery results, user management, and game mechanics
• Design and implement user-facing features for Web, iOS, and Android applications
• Take ownership of mission-critical functionality that is consumed by our mobile, web, and internal applications
• Work as a team with your peers, collaborating on architecture, mentoring teammates, and pushing our entire stack forward
• Stay up to date on the latest innovations in our industry and in our tech stack
• Integrating with and managing third-party APIs as well as designing and developing APIs for partners and peers
• Work with the product team to keep the roadmap realistic, on track, and groomed
• Capable of writing technical specs and documenting work
• Management of Jira, Git, AWS, Heroku, and other platform systems

Competencies and Skills Required

1. Requires excellent analytical, problem-solving, and good communications skills
2. Must be able to work effectively with business stakeholders
3. Able to understand requirements and implement complete business solutions for our industry
4. Must possess strong customer service skills
5. Excellent written and verbal communication
6. Must have excellent interpersonal skills

Senior Fullstack Developer (MERN Stack) having min 4 years of relevant experience with hands-on experience in handling all aspects of Product Management internal and external facing Product development. Work with Founders to set a product vision and strategy that delivers unique value based on customer needs and expectation. Work closely with development and program management to deliver products and features.

Key Responsibilities

• Demonstrated experience managing the full product development life cycle, including product conceptualization,  prototyping, and development
• Software development experience to not just be able to solve stuff on your own but also to better communicate / manage and colloborate between team
• Hands on leader who's comfortable coding, providing code reviews, and leading complex architectural design discussions in team setting. Can set coding standards, ensure quality.
• Team leading experience
• Technical Expertise in AWS deployment
• Very deep capabilities to architect enterprise class applications on the cloud with web/mobile front ends. Microservices Architecture. Cross-platform integrations.

Stack base:

UI - Tailwind, styled components, react (familiar in Functional components and hooks) and react router

State management - Redux and redux saga,

Backend - Express and node,

Database - Redis and MongoDB with mongoose ODM