Tech Lead

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.

We are inviting a Fullstack Developer who excels at building modern web and mobile applications, with deep backend experience in Node.js and strong frontend proficiency in Next.js and React Native (Expo). You’ll work with a team of designers, product leads, and developers to bring impactful climate tech to life.

Location: Mumbai & Vicinity (India)

Responsibilities:

• Design, develop, and maintain scalable backend services using Node.js.
• Develop responsive and high-performance web applications using Next.js.
• Build and deploy mobile applications using React Native and Expo.
• Collaborate with UX Designers, Architects, and other Developers to implement full-stack web and mobile solutions.
• Perform data modeling and database management using PostgreSQL and Prisma.
• Ensure the performance, quality, and responsiveness of applications.
• Troubleshoot and debug applications to optimize performance.
• Write clean, maintainable, and well-documented code.
• Participate in code reviews and contribute to continuous improvement of development processes.
• Apply AI-enhanced developer tools like Cursor, Copilot, or similar to boost development velocity and code quality.

Required Skills and Experience:

• 2+ years of experience in full-stack JavaScript development.
• Strong proficiency in backend development using Node.js.
• Demonstrated experience with frontend technologies such as Next.js and React Native.
• Experience with PostgreSQL and Prisma for database management and data modeling.
• Experience with deploying React Native applications using Expo.
• Solid understanding of RESTful APIs and how to integrate them with front-end applications.
• Familiarity with modern JavaScript (ES6+), HTML5, and CSS3.
• Strong understanding of software development best practices.
• Proficiency in version control systems such as Git.

Additional Relevant Skills and Experience:

• Experience with map modules, such as ArcGIS, and Google Earth Engine.
• Experience with TypeScript.
• Experience with CI/CD pipelines.
• Understanding of server-side rendering and static site generation.
• Good eye for design and UX principles.
• Experience working in Agile/Scrum environments.

Good to Have:

• Experience with WebSockets and real-time applications.
• Familiarity with cloud platforms such as AWS or Azure.
• Experience with Docker and containerized applications.
• Knowledge of performance optimization techniques.
• Strong problem-solving skills and ability to work independently or as part of a team.

We Offer:

• Work on Open Source Projects
• Competitive Salary based on Location
• Flexible working hours
• 4 weeks of paid leave/year
• Work from home

Plant-for-the-Planet is a global, youth-led non-profit with a mission to restore ecosystems through tree planting and climate justice advocacy. Our tech team, spanning five continents, builds scalable, open-source tools to support environmental action at a global scale.

Learn more: https://www.plant-for-the-planet.org

We are seeking a skilled MERN Full Stack Developer to join our dynamic team. The ideal candidate will be proficient in both front-end and back-end technologies and possess a passion for developing high-quality web applications. As a MERN Full Stack Developer, you will be responsible for designing, developing, and maintaining robust web applications using the MERN stack.

Responsibilities:

• Collaborate with cross-functional teams to define, design, and ship new features.
• Develop user-facing features using React.js.
• Build reusable components and front-end libraries for future use.
• Design and implement responsive user interfaces.
• Develop and maintain server-side architecture using Node.js and Express.js.
• Integrate data storage solutions using MongoDB.
• Implement RESTful APIs and GraphQL for efficient communication between front-end and back-end systems.
• Optimize applications for maximum speed and scalability.
• Implement security and data protection measures.
• Troubleshoot and debug issues across the entire stack.
• Stay up-to-date with emerging technologies and best practices.

Requirements:

• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent work experience).
• Proven experience as a Full Stack Developer or similar role.
• Strong proficiency in JavaScript and its modern ES6+ syntax.
• Extensive experience with React.js and its core principles.
• Experience with popular React.js workflows (such as Flux or Redux).
• Solid understanding of server-side development using Node.js and Express.js.
• Experience with NoSQL databases, particularly MongoDB.
• Familiarity with RESTful APIs and GraphQL.
• Knowledge of authentication and authorization mechanisms.
• Experience with version control systems (e.g., Git).
• Excellent communication and collaboration skills.
• Ability to work independently and as part of a team in a fast-paced environment.
• Strong problem-solving skills and attention to detail.

Preferred:

• Experience with cloud platforms (e.g., AWS, Azure, Google Cloud).
• Knowledge of containerization and orchestration technologies (e.g., Docker, Kubernetes).
• Familiarity with CI/CD pipelines.
• Experience with testing frameworks (e.g., Jest, Mocha).
• Understanding of Agile methodologies.

Full Stack Developer Responsibilities:

• Developing front end website architecture.
• Designing user interactions on web pages.
• Developing back-end website applications.
• Creating servers and databases for functionality.
• Ensuring cross-platform optimization for mobile phones.
• Ensuring responsiveness of applications.
• Working alongside graphic designers for web design features.
• Seeing through a project from conception to finished product.
• Designing and developing APIs.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

Requirements

• Degree in computer science.
• Experience with ( React+Node ) Or ( react + Angular) Or ( Node + Angular)
• Strong organizational and project management skills.
• Proficiency with fundamental front-end languages such as HTML, CSS, and JavaScript.
• Familiarity with JavaScript frameworks
• 
  
• Familiarity with database technology such as MySQL, Oracle, and MongoDB.
• Excellent verbal communication skills.
• Good problem-solving skills.
• Attention to detail.

Roles and Responsibilities

• Quick learner with a great attitude and should be willing to learn new technology. Basic knowledge in HTML, JavaScript, C or any other coding language
• Good in Communication and having excellent professional values.

Purpose of the Role

To design and implement the Peak AI System - a new system of intelligence that allows companies to quickly harness the power of AI.

The Opportunity 

Peak is a Decision Intelligence company - we are on a mission to help organisations use AI to make great commercial decisions, all the time. Just as importantly, we are also focused on building an amazing company - one where we truly value our people & culture, and strive to make an amazing and diverse place to work. Our recent Best Companies award & 3 star accreditation for being one of the top companies to work for is a testament to this.

We have ambitious plans over the coming years; to launch and lead a new category of technology (Decision Intelligence), expand our operations and create the best working culture possible. This is a great time to join Peak and the Engineering team, as we start the next stage of our global growth.

The Role

Based in Jaipur or Pune, you will be working in a collaborative team on cutting edge technologies in a supportive and dynamic environment. Ultimately you are responsible for building the CODI and on-boarding new clients - this involves:

• Developing a good understanding of the solutions which Peak delivers, and how these link to Peak’s overall strategy.
• Making suggestions towards shaping the strategy for a feature and engineering design.
• Managing own workload and usually delivering unsupervised. Accountable for their own workstream or the work of a small team.  
• Understanding Engineering priorities and is able to focus on these, helping others to remain focussed too
• Acting as the Lead Engineer on a project. Helps ensure others follow Peak processes, such as release and version control.
• An active member of the team, through useful contributions to projects and in team meetings.
• Supervising others. Deputising for a Lead and/or support them with tasks. Mentoring new joiners/interns and Masters students. Sharing knowledge and learnings with the team.

Required Skills and Experience

We are building a team of world class engineers in Jaipur / Pune, essentially we are looking for bright, talented engineers looking to work at the cutting edge of practical AI.

• Acquired strong proven professional programming experience.
• Strong command of Algorithms, Data structures, Design patterns, and Product Architectural Design.
• Good understanding of DevOps, Cloud technologies, CI/CD, Serverless and Docker, preferable AWS 
• Proven track record and expert in one of the field - DevOps/Frontend/Backend
• Excellent coding and debugging skills in any language with command on any one programming paradigm, preferred Javascript/Python/Go
• Experience with at least one of the Database systems - RDBMS and NoSQL
• Ability to document requirements and specifications.
• A naturally inquisitive and problem-solving mindset.
• Strong experience in using AGILE or SCRUM techniques to build quality software.
• Advantage: experience in React js, AWS, Nodejs, Golang, Apache Spark, ETL tool, data integration system, certification in AWS, worked in a Product company and involved in making it from scratch, Good communication skills, open-source contributions, proven competitive coding pro

As well as doing great work we have created an award-winning, fun and exciting workplace that people love to be, we are looking for people to join us who share our values and are:

• Open - Always up for new ideas and able to take and give feedback in a positive way.
• Driven - sets high goals, doesn’t give up, and make sacrifices to ensure that their job gets done on time and meets/exceeds expectations.
• Curious - Aware of new technologies and uses them to make new improvements in the Engineering ecosystem.
• Smart - Innovative and thinks out of the box, in difficult situations finds a way to succeed no matter what 
• Responsible - takes ownership of tasks given and has a strong work ethic.

About Peak

In an age when becoming AI and data-driven is one of the most important things businesses must do, it can also be one of the most challenging. That’s where Peak comes in; our CODI system sits at the heart of our client’s businesses, enabling the rapid unification, modelling and - most importantly - use of data - helping decision makers make great commercial decisions, powered by AI. All supported by our world-class data science team.

Founded in 2014, Peak has grown rapidly, in line with the world’s fastest growing SaaS companies, winning numerous awards and attracted significant funding to support the company’s ongoing investment in machine learning and AI technologies. All to further our mission to become the world’s leading AI System business.

Headquartered in Manchester, Peak also has offices in London, Edinburgh, Jaipur and Brisbane. Our clients include some of the world's leading retailers, manufacturers and well-known brands alongside highly innovative and tech-savvy businesses. Peak is an Amazon Web Services (AWS) Partner, and holds Machine Learning Competency and Retail Competency status.