SDE III - Backend Developer

Refyne; Bengaluru; On-site; INR 2,500,000 - 4,500,000; Full time

Job summary

Refyne is seeking a Backend SDE 3 with 5+ years of experience to design, develop, and maintain scalable fintech backend systems powering our product suite. You will own features end-to-end, contribute to architecture decisions, and mentor junior engineers.

You will work with AWS, Typescript/Python/Node.js, and both SQL and NoSQL databases, shaping robust services and APIs. A strong emphasis on code quality and collaboration is expected in a fast-paced startup context.

Qualifications

• 5+ years of professional backend development experience.
• 4+ years of programming in at least one modern language (TypeScript, Python, Node.js, NestJS, JavaScript).
• 2+ years contributing to architecture and design of systems.
• Strong data structures, algorithms, problem solving and complexity analysis.
• Experience building scalable high performance systems.
• Solid RESTful API design and communication.
• Experience with SQL and NoSQL databases (PostgreSQL, MySQL, MongoDB, DynamoDB).
• Proficiency in asynchronous programming (async/await, Promises, event loop).
• Knowledge of authentication/authorization, Firebase auth and JWT.
• Cloud tech (AWS) and CI/CD concepts/tools.
• Excellent interpersonal and collaboration skills.
• Attention to detail with analytical thinking.
• Proven leadership and mentoring experience.
• Obsessed with code quality and customer experience.
• Rapidly learns new tools, languages and workflows.

Responsibilities

• Own product/features end-to-end from development to production.
• Ensure features are scalable and highly available with quality.
• Work with senior engineers to refine design and implementation.
• Contribute to low-level and high-level design discussions and docs.
• Write clean, well-documented code following best practices.
• Assist in hiring and developing technical talent.
• Create quality plans, project plans, test strategies with management.
• Mentor junior engineers to enforce software engineering best practices.
• Deliver end-to-end commitments with customer-centric focus.
• Collaborate with frontend, product, and design teams.
• Identify and resolve issues, implement effective error handling, monitor.
• Participate in CI/CD and leverage AWS for deployment/management.
• Participate in code reviews and foster continuous improvement.

Skills

Leadership & mentoring

System design & architecture

RESTful APIs

Problem solving

Time & priority management

Collaboration & communication

Quality mindset

Learning mindset

Proactive attitude

Tools

AWS

Firebase Authentication

JWT

PostgreSQL

MySQL

MongoDB

DynamoDB

NestJS

TypeScript

Python

Node.js

Job description

Role Overview:

We are seeking a skilled and passionate Backend SDE 3 with 5+ years of experience in backend/platform engineering. The ideal candidate should have hands-on expertise in backend programming and a strong understanding of the applications and system design concepts. You will play a vital role in designing, developing, and maintaining robust and scalable backend systems that power our innovative fintech products suite. This role requires a strong foundation in software engineering principles, technical leadership and implementations of best practices.

Key Responsibilities

• Ownership of product/ feature end-to-end for all phases from the development to the production
• Ensuring the developed features are scalable and highly available with no quality concerns
• Work closely with senior engineers for refining the design and implementation
• Contribute to Low-Level and High-Level Design discussions and documentation
• Write clean, efficient, and well-documented code following best practices and design patterns
• Assist directly and indirectly in the continual hiring and development of technical talent
• Create and execute appropriate quality plans, project plans, test strategies and processes for development activities in concert with business and project management efforts.
• Proactively mentoring and guiding the young talent of the engineering team to enforce S/W engineering best practices
• The ideal candidate is a passionate engineer about delivering experiences that delight customers and creating solutions that are robust. He/She should be able to commit and own the deliverables end to end
• Collaborate effectively with cross-functional teams including front-end, product, and design
• Proactively identify and resolve issues, implement effective error handling, and contribute to monitoring strategies
• Participate in CI/CD processes and leverage AWS cloud services for deployment and management
• Actively participate in code reviews and contribute to a culture of continuous improvement

Required Skills & Qualifications:

• 5+ years of professional backend development experience.
• 4+ years of programming experience with at least one modern language such as Typescript, Python, Node.js, NestJS, JavaScript etc with strong proficiency.
• 2+ years of experience contributing to the architecture and design (architecture, design patterns, reliability and scaling) of new and current systems.
• Strong Proficiency in Data Structures, Algorithmic design, problem solving and complexity analysis.
• Experience in building scalable high performance large systems.
• Solid understanding and hands-on experience with RESTful API design and communication.
• Experience with both SQL (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB, DynamoDB) databases, including schema design.
• Proficient in asynchronous programming concepts (e.g., async/await, Promises, event loop).
• Working knowledge of user authentication and authorization principles and implementation
• Familiarity with Firebase authentication and JWT.
• Knowledge of cloud technologies (AWS preferred) and CI/CD concepts/to ols.
• Outstanding interpersonal, communication and collaboration skills
• Attention to details coupled with the ability to think abstractly and analytically.
• Proven technical Leadership and mentoring experience
• Obsession with code quality and customer experience.
• Proven track record of being able to learn new tools and technologies, languages and workflows.
• Exceptional at time and priority management.
• Passion for working in a high-paced startup environment and a continuous learning mindset.