Python Developer at Card91 · Bengaluru (Bangalore) · 2 - 5 years · ₹15L - ₹30L / yr (ESOP available) · Raised funding · Posted 23 Aug 2021

Card91 is simplifying business payments by providing a plug and play issuance infrastructure
to businesses for domestic and cross-border payments. Our full stack platform enables
businesses to gain control and visibility into their payment flows, controlling the entire payment
lifecycle from onboarding, to issuance, to transaction and data reconciliation. The platform
aims to provide holistic solutions around payment issuance and distribution management. Our
deep focus in payments will help us in bringing new issuance formats as well as technologies
to businesses.
The company has been founded by seasoned technology entrepreneurs who have founded
successful companies like Myntra, Mastiff Technologies earlier. Headquartered in Bangalore,
with presence in Mumbai and NCR, Card91 aims to disrupt the payment infrastructure space
in the issuer-processor segment.
Position: Python Developer
We are building our core team which will be responsible for a highly scalable, always available
microservices based backend for payment processing. The developer will be involved with the
design, implementation, and execution from day one and build a robust, secure, and scalable
payment processing engine.
Roles & Responsibilities
● Individual Contributors talking full ownership of the micro services
● Design and Implement the micro services from scratch
● Be creative and always try to evaluate new strategies to execute faster
● Team player and always eager to teach new team members about the code,
● structure and design
● Not afraid of bringing new designs (even languages) which will make the system
execute faster
Experience and Qualifications
● Having 2 - 5 years of experience
● Degree from a premier institute like IIT/NIT/BITS is desirable
● A strong expertise in Python framework (like Django, Flask or Pyramid)
● Experience in creating APIs with design standards, patterns and best-practices
● Knowledge of object-relational mapping (ORM)
● GoLang experience is a big plus
● Experience building web services in REST
● knowledge and hands-on experience in API security standards and implementation
(Oauth, OpenId)
● Experience in developing highly scalable and reliable web applications, including
integration with internal and external systems.
● Experience in databases like MySQL and NoSQL db like Cassandra, etc.
● Experience with Cloud computing AWS & Microservices architecture
● Exposure to front end technologies like VueJS, ReactJS etc is an advantage
● Docker & Kubernetes experience is a big plus
● Previous experience of Fintech company is an added advantage
What’s on offer
● Vibrant, fun and rewarding culture that nurtures and promotes excellence
● Opportunities to learn and interact with payment industry leaders
● Competitive remuneration, group health insurance & PF
● Other office perks of being part of an early-stage startup
Location: HSR Layout, Bangalore

About Card91
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If Interested kindly share your updated resume on 82008 31681
As a Python Engineer, you will play a critical role in building and scaling data pipelines, developing prompts for large language models (LLMs), and deploying them as efficient, scalable APIs. You will collaborate closely with data scientists, product managers, and other engineers to ensure seamless integration of data solutions and LLM functionalities. This role requires expertise in Python, API design, data engineering tools, and a strong understanding of LLMs and their applications.
About Synorus
Synorus is building a next-generation ecosystem of AI-first products. Our flagship legal-AI platform LexVault is redefining legal research, drafting, knowledge retrieval, and case intelligence using domain-tuned LLMs, private RAG pipelines, and secure reasoning systems.
If you are passionate about AI, legaltech, and training high-performance models — this internship will put you on the front line of innovation.
Role Overview
We are seeking passionate AI/LLM Engineering Interns who can:
- Fine-tune LLMs for legal domain use-cases
- Train and experiment with open-source foundation models
- Work with large datasets efficiently
- Build RAG pipelines and text-processing frameworks
- Run model training workflows on Google Colab / Kaggle / Cloud GPUs
This is a hands-on engineering and research internship — you will work directly with senior founders & technical leadership.
Key Responsibilities
- Fine-tune transformer-based models (Llama, Mistral, Gemma, etc.)
- Build and preprocess legal datasets at scale
- Develop efficient inference & training pipelines
- Evaluate models for accuracy, hallucinations, and trustworthiness
- Implement RAG architectures (vector DBs + embeddings)
- Work with GPU environments (Colab/Kaggle/Cloud)
- Contribute to model improvements, prompt engineering & safety tuning
Must-Have Skills
- Strong knowledge of Python & PyTorch
- Understanding of LLMs, Transformers, Tokenization
- Hands-on experience with HuggingFace Transformers
- Familiarity with LoRA/QLoRA, PEFT training
- Data wrangling: Pandas, NumPy, tokenizers
- Ability to handle multi-GB datasets efficiently
Bonus Skills
(Not mandatory — but a strong plus)
- Experience with RAG / vector DBs (Chroma, Qdrant, LanceDB)
- Familiarity with vLLM, llama.cpp, GGUF
- Worked on summarization, Q&A or document-AI projects
- Knowledge of legal texts (Indian laws/case-law/statutes)
- Open-source contributions or research work
What You Will Gain
- Real-world training on LLM fine-tuning & legal AI
- Exposure to production-grade AI pipelines
- Direct mentorship from engineering leadership
- Research + industry project portfolio
- Letter of experience + potential full-time offer
Ideal Candidate
- You experiment with models on weekends
- You love pushing GPUs to their limits
- You prefer research + implementation over theory alone
- You want to build AI that matters — not just demos
Location - Remote
Stipend - 5K - 10K
Software Developer
Roles and Responsibilities
- Apply knowledge set to fetch data from multiple online sources, cleanse it and build APIs on top of it
- Develop a deep understanding of our vast data sources on the web and know exactly how, when, and which data to scrap, parse and store
- We're looking for people who will naturally take ownership of data products and who can bring a project all the way from a fast prototype to production.
Desired Candidate Profile
- At Least 1-2 years of experience
- Strong coding experience in Python (knowledge of Javascripts is a plus)
- Strong knowledge of scraping frameworks in Python (Request, Beautiful Soup)
- Experience with SQL and NoSQL databases
- Knowledge in Version Control tools like GIT.
- Good understanding and hands-on with scheduling and managing tasks with cron.
Nice to have:
- Experience of having worked with elastic search
- Experience with multi-processing, multi-threading, and AWS/Azure is a plus
- Experience with web crawling is a plus
- Deploy server/related components to staging, live environments.
- Experience with cloud environments like AWS,etc as well as cloud solutions like Docker,Lambda, etc
- Experience in DevOps and related practices to improve development lifecycle, continuous delivery with high quality is an advantage.
- Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement
● Follow due SDLC process for different phases of
development like design, development, unit testing,
maintenance
● Understand the requirements clearly from Functional
specs and future roadmap
● Write and update software design specs for the
solution
● Participate and invite peer review for design and
coding
● Support the automation requirements of continuous
integration and continuous deployments
● Handle customer escalations and special requests in a
timely manner
● Work with the rest of the team in a professional manner
and show ownership and commitment.
Qualifications and Required Skills:
● 2+ years experience in Software development
● In-depth knowledge of database technologies (SQL and
NoSQL)
● Proficiency in Python/Django framework
● Experience building RESTful APIs and knowledge of
RESTful design patterns
● Well versed with the complete Software Engineering Lifecycle.
● Strong Software development fundamentals including OOPS,
MVC, General Algorithms, Design Patterns etc.
● Good debugging and problem solving skills
● Analytical skills.
● Algorithmic and structured thinking.
● Works effectively within a collaborative team environment
● Good communication skills and positive attitude
Other Benefits:
● Insurance - Medical Insurance Coverage of 3,00,000 for
individual, spouse and kids. *Option of including parents and
higher coverage amount of 5,00,000
● Professional Development - Reimbursement towards relevant
courses that can help you grow your career and build your
knowledge level.
● Food - Lunch, Tea and Snacks. All you can eat!
● Work Culture- Flexible Result Oriented Work Environment
● Dress - We aren’t buttoned down. Wear anything you’re
comfortable in.Wear any comfortable dress you like to the office
– and be as comfortable at work
● Foosball - Whether you want to pick up the game or master
your skills, you’ll find plenty of people to play with
● TGIF - We’ll find something to do at the end of each week. Work
hard, party harder!
Responsibilities
- Writing clean and secure modular codes that have undergone strict testing and evaluation.
- Maintaining and designing databases effectively.
- Build efficient, testable, and reusable PHP modules
- Solve complex performance problems and architectural challenges
- Write quality code with robustness and re-usability for secured web applications and web services (REST and SOAP) for mobile apps.
- Ability to work in a team environment as well should be able to manage a team.
- Must meet the deadline.
Requirements
- Strong hands on experience with PHP Laravel framework
- Knowledge of object oriented PHP programming
- Must have strong experience with API (Web Services) development using JSON, RESTFUL.
- Understanding of MVC design patterns
- Should be best at writing and understanding complex queries using any of two from - MySQL, NoSQL, MongoDB, PostgreSQL, T-SQL.
- Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
- Proficient understanding of code versioning tools, such as Git, SVN.
- Excellent communication and problem-solving skills.

Location : Hyderabad / Pune
Experience : 5 - 13 Yrs
Requirements :
- 5+ years of work experience in software development or web application development
- 2+ years of experience with programming using Ruby Full stack web development expertise (Javascript, CSS/Less, Sphinx, Redis, haml, Rspec)
- Ruby on Rails (RoR) Experience is a must
- Design and programming of n-tier solutions
- Experience with Agile and Scrum Software Development Life Cycle Models
- Bachelor's degree in Computer Science or a related field
- A good team player
- Works and communicates well with others
- A self-driven individual
- Be awesome, tell us what makes you special!
Preferred Qualifications :
- Enterprise application development experience
- An active Github/Bitbucket/Beanstalk account
- Contributed and launched your own web application deployed on cloud computing platforms (AWS, Rackspace, etc.)
- Dealt with database performance issues and query optimization in MySQL
- Contributed fixes/features to Rails Core, jQuery
- Written and/or maintain a Rails plugin and/or Ruby Gem
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