Technical Lead – Full stack (React & Python)

Senior Full Stack Developer | 4–7 Years

We’re looking for a highly skilled, ownership-driven Senior Full Stack Developer to join our Engineering team. If you thrive on building scalable, high-performance web applications and have strong expertise across modern frontend and backend technologies

Roles & Responsibilities

• Design, develop, and maintain scalable full-stack web applications using modern frontend and backend technologies.
• Build responsive, high-performance user interfaces using React.js and Next.js.
• Develop secure and scalable backend services and RESTful APIs using Node.js and Express.js.
• Design, optimize, and maintain databases using PostgreSQL and MongoDB.
• Collaborate with Product, Design, QA, and Engineering teams to deliver high-quality software solutions.
• Take ownership of application features from design and development through deployment and maintenance.
• Participate in architecture discussions and contribute to technical decision-making.
• Conduct code reviews, mentor junior developers, and drive engineering best practices.
• Optimize application performance, scalability, security, and maintainability.
• Troubleshoot production issues and implement long-term technical improvements.

Required Skills

Core Technical Skills

• React.js & Next.js
• Node.js&Express.js
• Java Script (ES6+) & TypeScript
• PostgreSQL& MongoDB
• RESTful API Development
• HTML5,CSS3&Responsive Design
• Git & Version Control
• Component-Based Architecture
• Software Design Principles
• Performance Optimization

Preferred Skills

• Docker &CI/CD Pipelines
• AWS, Azure, or Google Cloud Platform (GCP)
• Redux Toolkit &RTK Query
• Jest & React Testing Library
• Microservices Architecture
• Agile/Scrum Development

Perks & Benefits:

• Paid Annual Leaves
• Long vacation during new year
• PF, Health Insurance, Team Lunches
• Great job satisfaction
• Immense learning &personal development

Additional Details:

• Job Title: Senior Full Stack Developer
• CTC: Up to 10 LPA
• Location: JP Nagar, Bengaluru
• Job Type: Full Time (Onsite)
• Working Days: 6 Days
• Experience: 4- 7 Years
• Notice Period: Immediate to 7 day

Overview:

We're looking for a Full Stack Developer with strong backend expertise who can build,

manage, and scale AI-driven products end to end. You'll play a critical role in designing

scalable architectures, optimizing performance and cost, and building robust AI and agentic

systems.

Responsibilities

1. Architect and build scalable backend systems using FastAPI, PostgreSQL, and Redis.

2. Design, develop, and maintain AI-driven applications, integrating multiple LLMs, APIs,

and agentic frameworks.

3. Implement vector databases (pgvector, Qdrant, etc.) for RAG and AI memory systems.

4. Orchestrate multi-agent AI systems with LangChain/LangGraph, including function

calling, agent collaboration, and monitoring.

5. Build and integrate RESTful APIs for frontend and external use.

6. Manage DevOps workflows, including CI/CD, cloud deployments (AWS/GCP), server

scaling, and logging/monitoring (Sentry).

7. Optimize application cost, latency, and reliability, balancing speed with LLM call

efficiency and caching strategies.

8. Collaborate with product, design, and AI teams to translate business requirements into

high-performing tech.

9. Maintain documentation and ensure code quality with tests, reviews, and async-first

architecture.

10. Contribute to frontend development (React + TypeScript) when necessary, ensuring

seamless API integration and data visualization.

Requirements

Core Skills

• Strong proficiency in Python and FastAPI.

• Experience with PostgreSQL (including pgvector) and SQLAlchemy (async).

• Solid understanding of Redis, RQ (Redis Queue), and caching mechanisms.

• Proven experience integrating LLMs and AI APIs (OpenAI, Anthropic, etc.).

• Hands-on experience with LangChain / LangGraph, RAG pipelines, and agent

orchestration.

• Experience working with cloud platforms (AWS / GCP) and managing file storage (S3).

• Familiarity with frontend stacks (React, TypeScript, Tailwind, Zustand).

• Working knowledge of DevOps: Docker, CI/CD pipelines, deployment automation, and

observability tools (Sentry, Mixpanel, Clarity).

Bonus / Nice to Have

• Experience building agent monitoring dashboards or AI workflows.

• Prior experience in startup or product-based environments.

• Understanding of LLM cost optimization, token management, and function calling

orchestration.

• Familiarity with external API integrations like BrightData, Hunter.io, Adzuna, and Serper.

• Experience building scalable AI products (e.g., chatbots, AI copilots, data agents, or

automation tools).

Mindset

• Startup-ready: comfortable working in fast-paced, ambiguous environments.

• Deep curiosity about AI systems and automation.

• Strong sense of ownership and accountability for shipped products.

• Pragmatic and cost-conscious in architectural decisions.

• Excellent communication and documentation skills.

Position Overview: The Lead Software Architect - Python & Data Engineering is a senior technical leadership role responsible for designing and owning end-to-end architecture for data-intensive, AI/ML, and analytics platforms, while mentoring developers and ensuring technical excellence across the organization. 

Key Responsibilities: 

• Design end-to-end software architecture for data-intensive applications, AI/ML pipelines, and analytics platforms
• Evaluate trade-offs between competing technical approaches 
• Define data models, API approach, and integration patterns across systems 
• Create technical specifications and architecture documentation 
• Lead by example through production-grade Python code and mentor developers on engineering fundamentals 
• Conduct design and code reviews focused on architectural soundness 
• Establish engineering standards, coding practices, and design patterns for the team 
• Translate business requirements into technical architecture 
• Collaborate with data scientists, analysts, and other teams to design integrated solutions 
• Whiteboard and defend system design and architectural choices 
• Take responsibility for system performance, reliability, and maintainability 
• Identify and resolve architectural bottlenecks proactively 

Required Skills:  

• 8+ years of experience in software architecture and development  
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field 
• Strong foundations in data structures, algorithms, and computational complexity 
• Experience in system design for scale, including caching strategies, load balancing, and asynchronous processing  
• 6+ years of Python development experience 
• Deep knowledge of Django, Flask, or FastAPI 
• Expert understanding of Python internals including GIL and memory management 
• Experience with RESTful API design and event-driven architectures (Kafka, RabbitMQ) 
• Proficiency in data processing frameworks such as Pandas, Apache Spark, and Airflow 
• Strong SQL optimization and database design experience (PostgreSQL, MySQL, MongoDB)  Experience with AWS, GCP, or Azure cloud platforms 
• Knowledge of containerization (Docker) and orchestration (Kubernetes) 
• Hands-on experience designing CI/CD pipelines Preferred (Bonus) 

Skills: 

• Experience deploying ML models to production (MLOps, model serving, monitoring) Understanding of ML system design including feature stores and model versioning 
• Familiarity with ML frameworks such as scikit-learn, TensorFlow, and PyTorch  
• Open-source contributions or technical blogging demonstrating architectural depth 
• Experience with modern front-end frameworks for full-stack perspective

Description:

Looking for experienced Software Developer with a strong background in SaaS product development. This role is crucial in driving the design and development of a modern accounting software for India.

The role gives you a unique chance to work on cutting-edge technology in an exciting, high-growth early stage startup that has a vision to revolutionize the way accounting is approached in India.

Key Responsibilities:

• Lead the development of end-to-end solutions that meet market needs.
• Architect, build, and maintain scalable, high-quality software.
• Write clean, efficient, and reusable code in multiple languages, such as Python and Node.js.
• Collaborate with cross-functional teams to bring products to life.
• Test, debug, and refine software based on feedback from users and analytics.
• Proactively research and evaluate new technologies and libraries that can enhance product features or improve development workflows.
• Create technical documentation for software systems.

Qualifications:

• A portfolio showcasing your contributions to projects or products that are currently in use by real people.
• Experience leading teams, particularly those recognized in hackathons or similar competitions.
• A “hacker hobbyist” attitude – enthusiasm for tackling diverse technical challenges.
• Proficiency in multiple programming languages, including Python and Node.js.
• Demonstrated ability to think independently about which tools, libraries, or frameworks to test and implement.
• A comprehensive understanding of the software development lifecycle.
• Excellent problem-solving skills and the ability to work with minimal supervision.
• Strong communication skills and the ability to work collaboratively in a team environment.

What We Offer:

• Competitive salary and equity package. As an early member of the team, you’ll be getting in on the ground floor where the equity portion of your compensation has significant upside.
• The opportunity to be a part of building something truly impactful and to shape the direction of a product with global potential.
• A flexible, dynamic work environment where your contributions are valued and celebrated.
• Professional and personal growth opportunities alongside a passionate and supportive team.

CTC: 25-40LPA based on experience

Full Stack Developer

This position would design scalable, efficient and maintainable software architectures using Node.js

We are building a online platform for millennial and gen z moms and parents to surround them with support at every step of their parenting journey, right from planning a baby to 12 years of child. We would like to be their trusted 24*7 parenting guide, prepare for every new moment just in time and make every need available at a click of a button. With 90k+ babies born every day and increasing number of working mothers in urban nuclear India, our vision is to create a world of healthy pregnancies, thriving children and confident parents.

Founded by ex-3M, Gillette, Cargill folks, we have are moving fast now :-

·      50K installations in last 6 weeks

·      > 2 Million hits on the content site since going live in early 2021

·      Raised 2 rounds of investment

About the Role

Technical:-

·      Architect and Design: Collaborate with cross-functional teams to design scalable, efficient, and maintainable software architectures using Node.js.

·      Backend Development: Develop and maintain server-side applications and APIs using Node.js, ensuring high performance, responsiveness, and security.

·      Code Implementation: Write clean, well-organized, and documented code that aligns with best practices and coding standards.

·      Database Management: Hands-on experience, with MongoDB

·      Troubleshooting and Bug Fixing: Identify and resolve technical issues, bugs, and performance bottlenecks promptly.

·      Code Reviews: Conduct thorough code reviews to ensure code quality, maintainability, and adherence to architectural guidelines.

·      Performance Optimization: Analyse and optimize application performance through profiling, tuning, and implementing best practices.

·      Technology Evaluation: Stay up-to-date with the latest trends and advancements in Node.js and related technologies, and make recommendations for technology adoption

Non-Technical:-

·      Collaboration: Collaborate with frontend engineers, product managers, and other stakeholders to deliver seamless end-to-end features and enhancements.

·      Mentorship: Provide guidance and mentorship to junior developers, sharing your knowledge and expertise in Node.js development.

What you have to offer

Must-Have:-

·      Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent work experience).

·      Minimum of 4-5 years of professional experience in backend development, with at least 2-3 years focused on Node.js.

·      Strong proficiency in Node.js and JavaScript, including asynchronous programming, event-driven architecture, and familiarity with frameworks like Express.js.

·      Experience working with databases such as MySQL, MongoDB, or PostgreSQL, including database design and optimization.

·      Proficiency in version control tools (e.g. Git) and collaborative development workflows.

·      Solid understanding of RESTful API design principles and best practices.

·      Excellent problem-solving skills and the ability to debug complex issues.

Good To Have :-

·      Familiarity with cloud platforms such as AWS, Azure, or Google Cloud Platform.

·      Prior experience with frontend technologies (HTML, CSS, React, etc.) is a bonus.

·      Contributions to open-source projects, tech blogs, or relevant certifications are advantageous.

·      Experience with containerization technologies like Docker and orchestration tools like Kubernetes is a plus.

Critical Primary Responsibilities:

• Work with business analysts/product managers to estimate and design effective, scalable and maintainable solutions that meet business initiatives and objectives
• Develop and design software/platform that meets business requirements and technical design
• Troubleshoot pre- and post-production implementations and Handle the team
• You will provide back-end functionality that can run smoothly from any device or browser type
• Propose new ideas when there is strong business value and stay up to date on the latest technology trends and techniques.

Critical Skills & Experiences:

• At least 9+ years of experience developing in Java technologies with equivalent experience in systems analysis, OO design, OO programming and debugging skills
• Deep Understanding of Web UI, HTML5, CSS, JavaScript, AJAX, jQuery
• Integration with 3^rd party API’s.
• ReactJS – Must (min 7 years exp ) with nodejs.
• At least 9 years of experience in Java Spring Boot Framework development
• 7 years of experience in any Cloud platform, preferably AWS.
• At least 7 years of web services and relational database experience (preferably Mysql)
• At least a year of Elastic search experience
• Experience developing RESTful web services (preferably micro services)
• Experience with UNIX/Linux command line and shell scripting
• Experience working in cross-functional Agile/Scrum teams
• Any level of experience with JIRA or any other issue tracking technology
• Experience with Java application profiling and profiling tools
• Bachelor’s degree or the above equivalent skills and years of experience
• Should be able to manage end-to-end single handedly with prior experience
• Full stack developer overall with at least 9yrs experience.

Senior Software Engineers are responsible for the design and development of the suite of cloud-based software products utilizing cutting-edge tools and technologies.

What You Will Be Doing:

Work on Internet scale applications, where performance, reliability, and scalability, are critical design goals – not after-thoughts.
Learn the nuts and bolts of Microservices Architecture and build robust RESTful APIs.
Create beautiful, interactive, and easy-to-use web applications using modern client-side frameworks and libraries.
Gain experience with different database technologies, ranging from traditional relational to the latest NoSQL products such as Couchbase and Elastic Search.
AWS for infrastructure, deploying services with ECS and Lambda

What You Will Need for this Position

The prerequisites for joining our development team are simple. We care more about your attitude and aptitude than the specific tools and technologies you have used in the past. You need to have a strong passion for software development and must take pride in your coding. You should also have great analytical skills and ability to handle complex, modular software development in a collaborative team-based environment.

5+ years of overall development experience, which ideally includes working with an object-oriented language (Java)
Experience with using and implementing RESTful APIs.
Experience with one or more of the following databases: traditional relational database as well as document/NoSQL storage.
Experience with JavaScript, React/Angular/Vue and Node.js. We will also welcome proven engineering leaders who are eager to immerse themselves in mastering Typescript/JavaScript and our tech stack
BS, MS or PhD in Computer Science OR related technical discipline.
Big plus if prior experience with video processing, streaming and video-related cloud services such as AWS Elemental & Amazon IVS

Salary :- No bar for deserving candidates

Apptroit is a leading Mobile App & Web Solution Development Company in the USA, UK, UAE and India and serving its clients across the globe. Also having proficient and dedicated Android app developers, iOS App developers, designers and digital marketing experts with a reputation for getting things done. We are well-versed in a variety of operating systems, networks, and databases. We work with just about any technology that a small business would encounter. We use this expertise to help customers with small to mid-sized projects.