L #2684
Applications open
Full-Time Job
Backend Engineer
InFynd
About the role
- Design, develop, and maintain scalable backend applications using Python, Node.js, FastAPI, and Fastify.
- Develop, integrate, and maintain RESTful APIs and microservices.
- Design and optimize database schemas, queries, and indexing strategies using MongoDB, Elasticsearch, and MySQL.
- Build and maintain ETL pipelines for large-scale data processing, transformation, cleaning, and enrichment.
- Implement data normalization, deduplication, and data enrichment workflows.
- Integrate third-party APIs and external services with appropriate error handling, retry mechanisms, and failover strategies.
- Work on AI/LLM integrations using platforms such as Claude and other AI service providers.
- Develop and maintain Model Context Protocol (MCP) servers and AI-powered automation workflows.
- Optimize application performance, API response times, and database indexing.
- Troubleshoot production issues, monitor system performance, and ensure application reliability.
- Manage application deployment, version control, CI/CD pipelines, and cloud infrastructure.
- Collaborate with frontend developers, product teams, and other stakeholders to deliver scalable solutions.
- Participate in code reviews, technical discussions, and Agile development processes.
Requirements
Required Technical Skills
- Programming Languages: Python, JavaScript, TypeScript, SQL.
- Backend Frameworks: FastAPI, Node.js, Fastify.
- API Development: RESTful APIs, Microservices Architecture, API Integration, Authentication.
- Databases: MongoDB, Elasticsearch, MySQL, NoSQL.
- Data Engineering: ETL Pipelines, Data Processing, Data Cleaning, Data Normalization, Data Deduplication.
- AI & LLM: Claude API, Anthropic API, LLM Integrations, MCP, AI-powered Automation.
- DevOps & Deployment: Linux, Git, CI/CD, PM2, systemd, Cloud Deployment.
- Monitoring & Debugging: Kibana, Postman, Production Monitoring, Performance Optimization.
Required Experience & Qualifications
- Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field.
- Minimum 5 years of professional experience in backend development.
- Strong hands-on experience with Python and/or Node.js backend development.
- Experience designing and developing scalable APIs and microservices.
- Strong understanding of database architecture, query optimization, and data processing.
- Experience working with production environments and cloud deployments.
- Good problem-solving, analytical, and debugging skills.
- Ability to work independently and collaborate effectively with cross-functional teams.
Eligibility & process
Who can apply
Seniority: Executive. Employment type: Full-time
Skills & stack
Selection process
Details are shared by the recruiter after shortlisting.
Prep kit
20 resourcesStudy material 4
Aptitude Practice Questions & Mock Tests
Curated logical, quantitative, and verbal reasoning problems for the initial online screening round.
Company-Specific Interview Preparation Corner
Detailed interview experiences, exam formats, and previous test questions for InFynd and tech roles.
Technical Placement Question Bank
High-yield coding cheat sheets, core CS fundamentals (OOP, DBMS, OS, Networks), and rapid revision guides.
Algorithm, DSA & Live Code Debugger Practice
Hands-on problem sets to improve coding speed and step-by-step memory debugging.
Company-specific guides 4
APTITUDE & LOGIC
Aptitude Practice Questions & Online Mock Tests
Curated logical, quantitative, and verbal reasoning problems to sharpen reasoning skills required for the initial screening test.
COMPANY GUIDE
InFynd Interview Preparation Corner
Comprehensive guide covering typical interview formats, common questions, and preparation tips for InFynd and off-campus tech roles.
MOCK TESTS & PAPERS
Comprehensive Interview Prep Resources & Syllabus
Collection of previous year questions, company-specific test patterns, and interview experiences for technical and HR rounds.
CODING PRACTICE
Algorithm and Data Structure Problem Set
Practice problems to improve coding proficiency and algorithm problem-solving speed for technical rounds.
Likely coding questions 4
Round-wise strategy 4
Round 1: Online Assessment (OA)
Aptitude, Quantitative Logic & 2 Coding Problems
Focus on accuracy and speed. Practice arrays, strings, and standard arithmetic puzzles.
Round 2: Technical Interview 1
Core Tech Stack (Python, JavaScript, TypeScript, SQL, Node.js, FastAPI, REST APIs, Microservices) & Live Code Tracing
Explain your thought process aloud. Analyze time & space complexities before coding.
Round 3: System Design & Problem Solving
Database Schemas, APIs & Architecture Basics
Clarify edge cases, diagram schemas cleanly, and discuss scalability trade-offs.
Round 4: HR & Cultural Fit Discussion
InFynd Core Values, Learning Agility & Offer Terms
Demonstrate passion, strong communication, and readiness for full-time collaboration.
Technical questions 5
What is the difference between WHERE and HAVING clauses in SQL? Answer
Model answer: WHERE filters rows before any groupings are applied, while HAVING filters aggregated groups after GROUP BY has executed.
Explain SQL Window functions: ROW_NUMBER(), RANK(), and DENSE_RANK(). Answer
Model answer: ROW_NUMBER() assigns unique sequential integers. RANK() assigns identical ranks to ties and skips ranks. DENSE_RANK() assigns identical ranks to ties without skipping rank numbers.
How do you handle NULL and missing values during data cleaning in Python/Pandas? Answer
Model answer: Use .isna().sum() to identify missing values. Impute with mean/median using .fillna() or remove with .dropna(subset=[...]) depending on variance impact.
What is the difference between Star Schema and Snowflake Schema in Data Warehousing? Answer
Model answer: Star Schema has denormalized dimension tables directly connected to the central Fact table. Snowflake Schema normalizes dimension tables into sub-dimensions to minimize redundancy.
How do you calculate MoM (Month-over-Month) growth in SQL? Answer
Model answer: Use LAG(revenue, 1) OVER (ORDER BY month) to fetch the previous month's revenue and compute (revenue - prev_revenue) / prev_revenue * 100.
Behavioural & HR questions 3
Why do you want to join InFynd as a Backend Engineer?
Highlight InFynd's market reputation, recent tech innovations, and how your skills in Python directly solve their team's objectives.
Highlight InFynd's market reputation, recent tech innovations, and how your skills in Python directly solve their team's objectives.
Describe a challenging bug or academic project roadblock and how you resolved it.
Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
How do you handle strict deadlines or sudden scope changes?
Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.
Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.
Competitive Package
Coimbatore, India
Seniority: Executive. Employment type: Fu…
