N #2043
Applications open
Full-Time Job
Senior Full Stack Engineer (.NET / React)
BotFriday AI
About the role
To be considered for this role, please complete the application form: https://app.botfriday.ai/#/open/external-job-application/f38efa77-9f0d-41e5-9e70-5f20578c41bd About the role You'll join a growing engineering team and work closely with engineering teams in the US and Mexico to build, deliver, and maintain reliable, scalable software. This is a fully hands-on individual contributor role for a senior engineer with strong backend expertise in .NET and solid, demonstrated experience building modern frontend applications. While backend engineering will be the primary focus, you should be comfortable working independently across the stack, including React/frontend development, whenever required. Location: Hyderabad Work Mode: Hybrid What you'll do Design, build, and maintain robust, scalable backend systems using .NET Develop and maintain modern frontend applications using React Work across the full stack, taking ownership of features from backend services through frontend implementation Design and implement APIs, services, integrations, and other backend components Build responsive and maintainable frontend experiences using modern frontend technologies Work on authentication, authorization, and SSO integrations where required Make sound technical decisions around architecture, implementation, performance, and scalability Break down complex technical problems and drive solutions through implementation and delivery Collaborate closely with engineering teams in the US, Mexico, and India Participate in technical discussions, code reviews, and engineering best-practice initiatives Troubleshoot and resolve complex production and engineering issues Take ownership of features and deliver high-quality software with minimal supervision What we're looking for 6+ years of professional software engineering experience Strong, hands-on experience with .NET / C# and backend engineering Demonstrated hands-on experience with React and modern frontend development Ability to independently contribute to both backend and frontend development Strong understanding of software architecture, APIs, distributed systems, and scalable backend applications Experience building and integrating authentication and authorization systems Experience with SSO integrations such as SAML, OAuth, or OpenID Connect is highly preferred Experience working with databases, third-party integrations, and production-grade applications Strong problem-solving skills and a hands-on approach to engineering Experience working with distributed engineering teams is preferred Strong communication and collaboration skills Experience with cloud platforms is preferred Good to have Experience with payment systems or payment-related products Experience working with AI/ML-powered products or integrations Experience with additional modern frontend technologies Experience designing and implementing security and identity solutions Experience working in a product-focused engineering environment Who you are You're a hands-on engineer who enjoys building and solving complex technical problems You have deep backend expertise but are equally comfortable getting into the frontend when needed You take ownership of features and drive them through to completion You're comfortable working independently and making sound technical decisions You're curious, resourceful, and continuously looking to improve your technical skills You communicate clearly and collaborate effectively with teams across different locations You care about writing clean, maintainable, and reliable software
Eligibility & process
Who can apply
Experience: 6-9 Yrs. Open to matching qualifications.
Skills & stack
Selection process
- Online Assessment / Technical Interview Rounds / HR Review
Prep kit
19 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 BotFriday AI and tech roles.
Technical Placement Cheat Sheets & 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
BotFriday AI Interview Preparation Corner
Comprehensive guide covering typical interview formats, common questions, and preparation tips for BotFriday AI 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 (Full Stack, C#, React, Stack, Angular, .NET Core, Machine Learning, Distributed Systems) & 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
BotFriday AI Core Values, Learning Agility & Offer Terms
Demonstrate passion, strong communication, and readiness for full-time collaboration.
Technical questions 4
What is the bias-variance tradeoff and how do you prevent overfitting? Answer
Model answer: High bias leads to underfitting (oversimplified model), high variance leads to overfitting (captures noise). Mitigate using L1/L2 Regularization, Dropout, Cross-Validation, and data augmentation.
Explain the difference between Precision, Recall, and F1-Score. Answer
Model answer: Precision = TP / (TP + FP) (correctness of positive predictions). Recall = TP / (TP + FN) (coverage of actual positives). F1-Score is the harmonic mean of Precision and Recall.
How does Gradient Descent work and what is the role of Learning Rate? Answer
Model answer: It optimizes loss functions by iteratively moving weights in the direction of negative gradient. A large learning rate may overshoot the minimum; a small rate causes slow convergence.
What is the difference between Supervised, Unsupervised, and Self-Supervised learning? Answer
Model answer: Supervised uses labeled data (X -> y). Unsupervised finds hidden patterns in unlabeled data (clustering/PCA). Self-supervised generates labels from input data (e.g. masked language modeling in BERT/Transformers).
Behavioural & HR questions 3
Why do you want to join BotFriday AI as a Senior Full Stack Engineer (.NET / React)?
Highlight BotFriday AI's market reputation, recent tech innovations, and how your skills in Full Stack directly solve their team's objectives.
Highlight BotFriday AI's market reputation, recent tech innovations, and how your skills in Full Stack 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.