Senior Software Development Engineer (Payments) Full-time

Job Title : Backend Engineer (AI-First | FinTech/Crypto)

Experience : 3 to 6 Years

Location : Gurugram (Sector 49)

Working Hours : 10:00 AM – 6:00 PM

Work Mode : On-site | 6 Days Working

Employment Type : Full-time

Role Overview :

This is not a typical ticket-based engineering role. You will take end-to-end ownership of systems—designing architecture, building scalable solutions, and solving real-world performance challenges.

We operate in an AI-first engineering environment, leveraging advanced tools and automation workflows to build high-performance distributed systems.

Mandatory Skills :

Java/Spring Boot or Node.js, System Design (HLD/LLD), Distributed Systems, Event-Driven Architecture (Kafka/RabbitMQ), Low-Latency APIs, PostgreSQL/MongoDB, CI/CD, Docker/Kubernetes, AI-assisted development (Copilot/Cursor/Claude)

Key Responsibilities :

• Design and build scalable backend systems (Java/Spring Boot, Node.js, or similar).
• Architect and implement event-driven systems (Kafka, RabbitMQ, pub/sub).
• Develop secure and reliable financial systems with strong data integrity.
• Solve scalability and performance challenges in fintech/crypto environments.
• Own features end-to-end: design → development → deployment → monitoring.
• Work with real-time data pipelines (WebSockets, streaming, event sourcing).
• Define service contracts and optimize system architecture.

AI-First Engineering (Must-Have Mindset) :

You will :

• Use tools like GitHub Copilot, Cursor, and Claude in daily development
• Follow spec-driven development using structured instructions
• Review, validate, and ship AI-generated code with strong engineering judgment

Core Requirements :

• 3+ years of backend development experience.
• Strong expertise in Java (Spring Boot) or Node.js.
• Solid understanding of System Design (HLD/LLD, Distributed Systems).
• Experience with event-driven architectures (Kafka, RabbitMQ, async pipelines).
• Hands-on experience building low-latency, high-throughput systems.
• Strong database knowledge (PostgreSQL, MongoDB, etc.).
• Understanding of security, performance optimization, and reliability.
• Experience with CI/CD, Git, Docker, Kubernetes.
• Exposure to React / React Native is a plus.

Good to Have (Differentiators) :

• Experience in FinTech / Crypto / Web3 / Blockchain.
• Built systems for trading, payments, or real-time financial data.
• Experience with AI agents, automation pipelines, or agent-based systems.
• Exposure to parallel AI workflows (coding / testing / refactoring).
• Contributions to open source or technical blogs.
• Experience handling production-scale systems.

About the Role

We’re looking for an Elixir Developer who is passionate about building scalable, high performance backend systems. You’ll work closely with our engineering team to design, develop, and maintain reliable applications that power mission-critical systems.

Key Responsibilities

• Develop and maintain backend services using Elixir and Phoenix framework.

• Build scalable, fault-tolerant, and distributed systems.

• Integrate APIs, databases, and message queues for real-time applications.

• Optimize system performance and ensure low latency and high throughput.

• Collaborate with frontend, DevOps, and product teams to deliver seamless solutions.

• Write clean, maintainable, and testable code with proper documentation.

• Participate in code reviews, architectural discussions, and deployment automation.

Required Skills & Experience

• 2–4 years of hands-on experience in Elixir (or strong functional programming background).

• Experience with Phoenix, Ecto, and RESTful API development.

• Solid understanding of OTP (Open Telecom Platform) concepts like GenServer, Supervisors, etc.

• Proficiency in PostgreSQL, Redis, or similar databases.

• Familiarity with Docker, Kubernetes, or cloud platforms (AWS/GCP/Azure).

• Understanding of CI/CD pipelines, version control (Git), and agile development.

Good to Have

• Experience with microservices architecture or real-time data systems.

• Knowledge of GraphQL, LiveView, or PubSub.

• Exposure to performance profiling, observability, or monitoring tools.

Why Join Us?

• Work with a team that expects and delivers excellence.

• A culture where risk-taking is rewarded, and complacency is not.

• Limitless opportunities for growth—if you can handle the pace.

• A place where learning is currency, and outperformance is the only metric that matters.

• The opportunity to build systems that move markets, execute trades in microseconds, and redefine

fintech.

Role & Responsibilities:

We are seeking a Software Developer with 2-10 year’s experience with strong foundations in Python, databases, and AI technologies. The ideal candidate will support the development of AI-powered solutions, focusing on LLM integration, prompt engineering, and database-driven workflows. This is a hands-on role with opportunities to learn and grow into advanced AI engineering responsibilities.

Key Responsibilities

• Develop, test, and maintain Python-based applications and APIs.

• Design and optimize prompts for Large Language Models (LLMs) to improve accuracy and performance.

• Work with JSON-based data structures for request/response handling. • Integrate and manage PostgreSQL (pgSQL) databases, including writing queries and handling data pipelines.

• Collaborate with the product and AI teams to implement new features. • Debug, troubleshoot, and optimize performance of applications and workflows.

• Stay updated on advancements in LLMs, AI frameworks, and generative AI tools.

Required Skills & Qualifications

• Strong knowledge of Python (scripting, APIs, data handling).

• Basic understanding of Large Language Models (LLMs) and prompt engineering techniques.

• Experience with JSON data parsing and transformations.

• Familiarity with PostgreSQL or other relational databases.

• Ability to write clean, maintainable, and well-documented code.

• Strong problem-solving skills and eagerness to learn.

• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent practical experience).

Nice-to-Have (Preferred)

• Exposure to AI/ML frameworks (e.g., LangChain, Hugging Face, OpenAI APIs).

• Experience working in startups or fast-paced environments.

• Familiarity with version control (Git/GitHub) and cloud platforms (AWS, GCP, or Azure).

What We Offer

• The opportunity to define the future of GovTech through AI-powered solutions.

• A strategic leadership role in a fast-scaling startup with direct impact on product direction and market success.

• Collaborative and innovative environment with cross-functional exposure.

• Growth opportunities backed by a strong leadership team.

• Remote flexibility and work-life balance.

Company Overview

CareStack is a complete cloud-based dental software solution for scheduling, clinical, billing, patient engagement, and reporting needs of dental offices of any size - whether it's a single location or a large multi-site DSO with hundreds of locations.

The company was founded in 2015 and the commercial launch was done in early 2018. Since then, more than 1000 offices have chosen CareStack as their single source of truth. This is the fastest growth till date in the dental practice management software market, dominated by 100 year old distribution companies.

More about CareStack

●    Rated by independent B2B software reviews and research analysts as the most modern, innovative and customer experience focussed company in the space with the fastest growth in the segment.

●    Important strategic go to market partnerships with dental industry leaders like Delta Dental, Darby Dental and several others.

●    Venture backed with over $60M raised from leading financial and strategic investors.

●    HQ'd in Orlando, FL with offices in Minnesota, Bangalore, Trivandrum and Cochin.

Role Overview

CareStack seeks to hire Software Development Engineer - 1 to build its next generation healthcare platform. You will be reporting to a Staff SDE in your business unit , to develop and release services and solutions for our platform, aligning with your business unit’s goals and objectives.

Key responsibilities

●    Technical Design

You can be a specialist in technology areas, but capable of creating complete designs to solve a specific problem that accomplishes a definitive product feature or enables a technical advancement.You should work with your lead to review your design and embrace the feedback

●    Process Definition/Adherence

You should deliver estimations, review test scenarios/cases created by QAs in your team, participate in sprint grooming and planning meetings. You must learn, practice and evangelize standard techniques for grooming, defining complexity of stories and estimation.

●    Code Quality

At Carestack we believe that your code reflects your character. Code for scale, produce maintainable reusable code. You must commit to clean coding, continuous refactoring to ensure a high level of code quality. Continuously learn, practice and evangelize coding patterns/best practices within and outside your team. You should ensure testability of team functional areas, facilitate integration testing, resolve deep rooted technical issues and proactively collaborate with team members in solving complex problems.

●    Team Player

You should proactively communicate to resolve dependencies within and outside the team. Understand organizations culture code and streamline conversations and activities that will further instill this code. Mentor and coach new additions to your team.

●    Value/Mission Alignment

Be a champion for CareStack within the Engineering team. Help drive workplace and cultural norms within your business unit that align with CareStack company values.

This role may be for you if you…

●    Have an insatiable itch to join and the courage to scale an early-stage technology company.

●    Have 2-4 years of experience in building modern day web platforms, using Microsoft technologies on the backend.

●    Can be a generalist or specialist with deep understanding of building software components that meet defined requirements, with good understanding of .NET Core/ASP.NET.

●    Are proficient in data structures and algorithms, and object oriented analysis and design of software systems.

●    Are a backend specialist with good understanding of event driven programming, distributed systems, caching/in-memory computing systems, data modeling for transactional systems.

●    Solid understanding of relational and non relational databases including warehouses.Preferably MySQL, MSSQL, Vertica and CosmosDB

●    Solid understanding of CI/CD patterns and IaC.

●    Expertise in building ETLs in both batch and streaming model.

●    Expertise in building and testing APIs and micro services

This role may not be for you if you…

●    Don’t have the itch to design solutions and write code and you don’t grab every other opportunity to review and write code.

●    Don’t have the fire in you to fight for your design suggestions and debate with logical data points

●    Don’t have the trait to be transactional in code reviews/design discussions, accept your mistakes and appreciate better ideas from your peers.

●    Haven’t developed the habit of doing objective conversations that are data driven.

Designation: Python/Django Developer (Backend)

Department: Software Engineering Team

Location: Whitefield (Bangalore)

Qualification: Any Computer (Graduate or Post Graduate)

Experience: 3+ years of relevant experience in building functional and efficient server-side applications using Python/Django with 2+ years of relevant experience in working with RDBMS.

Responsibilities:

1. Help design and implement functional requirements
2. Build efficient back-end features in Python
3. Integrate front-end components into applications
4. Manage testing and bug fixes
5. Prepare technical documentation
6. Collaborate with UX/UI designers to implement design into the code
7. Coach junior team members
8. Implement software enhancements and suggest improvements

Skills Required:

1. Experience with Python frameworks (e.g. Django, Flask, FastAPI)
2. Familiarity with Amazon Web Services (AWS) cloud technologies
3. Excellent understanding of REST API Development and HTTP Methods
4. Understanding of databases and SQL
5. Good experience in working with RDBMS
6. Good understanding of computer science fundamentals - data structures, algorithms, memory management, performance.
7. Knowledge of web stack - javascript, html, web frameworks like React.js is a plus
8. Good understanding of Good Troubleshooting experience and exposure
9. Ability to work with Jr engineers, mentor, guide and help them
10. Enjoys coding and problem solving
11. Good communication skills. Ability to express ideas clearly and concisely
12. Familiarity with code versioning tools (such as Git, SVN, and Mercurial)

Salary: Upto 21LPA (Negotiable)

IMMEDIATE JOINING PREFERRED!

Numerator is a data and technology company reinventing market research. Headquartered in Chicago, IL, Numerator has 1,600 employees worldwide. The company blends proprietary data with advanced technology to create unique insights for the market research industry that has been slow to change.  The majority of Fortune 100 companies are Numerator clients. 

Job Description

What We Do and How?

We are a market research company, revolutionizing how it's done! We mix fast paced development and unique approaches to bring best practices and strategy to our technology. Our tech stack is deep, leveraging several languages and frameworks including Python, C#, Java, Kotlin, React, Angular, and Django among others. Our engineering hurdles sit at the intersection of technologies ranging from mobile, computer vision and crowdsourcing, to machine learning and big data analytics.

Our Team

From San Francisco to Chicago to Ottawa, our R&D team is comprised of talented individuals spanning across a robust tech stack. The R&D team is comprised of product, data analytics, engineers across Front End, Back End, DevOps, Business Intelligence, ETL, Data Science, Mobile Apps, and much more. Across these different groups we work towards one common goal: To build products into efficient and seamless user experiences that help our clients succeed.

About the Role

We’re looking for a well-rounded and passionate Full Stack Software Developer to join our team in creating an amazing client experience. If you’re interested in working on all layers of a system from developing new UI controls to creating flexible and scalable data architectures with the latest technologies and tools then Numerator is for you.

This person should be self-motivated. We’re not big on constant oversight and micromanagement. We’re looking for software engineers that can take a task, get clarity as needed, and run with it to produce well-designed quality code. You need to love to code and care about quality and design.

We understand that iteration is important to good design and development. We need a person who can take iterative steps toward delivering a solution. Working with the business the entire way to stay on target and deliver amazing results.

Skills & Requirements

• Minimum 4+ years of relevant experience in Ruby
• Demonstrated experience working on application development projects and test-driven development
• A strong engineer with excellent Ruby experience working with Ruby on Rails
• Experience with Javascript and related frameworks -- Backbone, Angular, React, etc
• Experience with SQL databases – Elasticsearch is a plus
• Experience with REST services and API design
• Knowledge of unit & integration testing
• Knowledge of agile development process
• Experience with version control systems (Git, Subversion etc.)

Having experience in any of the following would be a valuable asset:

•  Experience working with AWS
• Experience working with Node.js
• Basic understanding of the HTTP protocol
• Knowledge of business rules engines
• Programming experience on Unix based infrastructure

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law.

• 5+ years experience
• Previously managed a team
• Built & managed backend systems from scratch previously.
• Lead the core backend engineering team, including mentoring, coaching, architecture, devops, code review and software infrastructure
• Should be more proficient with Django.
• Work with the executive team to shape and execute the product roadmap
• Direct our team environment to achieve sprint deliverables and acceptance criteria
• Design and monitor metrics to assess product and infrastructure performance
• Hire, build and shape the team