Backend Engineer- Biglittle.ai

Lead API Engineer - IND

Engineering - Hyderabad, Telangana

About Gradera

At Gradera, we’re defining a new category of enterprise transformation called Software-Orchestrated Services™ (SoS™) — a governed blend of human expertise and digital intelligence that transforms how enterprises operate.

Our mission is to build intelligent digital workers that augment teams and automate work across the value chain, helping organizations become more efficient, agile, and resilient.

We don’t believe in one-size-fits-all solutions. Every engagement is tailored to the unique needs of each enterprise — grounded in governance, security, and reliability. By aligning technology with strategy, we empower our clients to achieve measurable outcomes and lead with confidence in a rapidly evolving digital landscape.

Lead – API Engineer

Overview

Key Responsibilities

•Provide technical leadership, mentorship, and guidance to the API engineering team

•Lead the design, implementation, and evolution of API architecture and backend services

•Champion API-first development, ensuring clear contracts and comprehensive documentation (OpenAPI/Swagger)

•Lead the implementations of APIs conforming to all NFRs including security, scalability, and performance.

•Ensure robust authentication, authorization, and data protection for all endpoints

•Drive adoption of best practices in API design, versioning, and integration

•Optimize API performance for low-latency, high-frequency interactions

•Oversee observability, monitoring, and alerting for all APIs and backend services

•Collaborate closely with product, UI, and runtime teams to deliver integrated solutions

•Collaborate with the SDET to ensure comprehensive test coverage and effective test data creation

•Lead the adoption of modern API tools, frameworks, and best practices

•Ensure engineering rigor, code quality, and documentation standards are met

•Facilitate clear communication, knowledge sharing, and effective documentation within the team

•Support team growth through coaching, feedback, and skills development

Core Qualities & Skills

•Proven experience leading API or backend engineering teams and delivering complex API projects

•Deep expertise in API architecture, design, and implementation (RESTful, GraphQL, gRPC etc.)

•Strong programming skills in relevant backend languages (e.g., Node.js, Python, Java, Go, etc.)

•Experience with API security, authentication, and authorization (OAuth, JWT, RBAC, PKCE, define fine-grained access controls using ReBAC)

•Experience with API documentation and standards (OpenAPI/Swagger, Use Case, JSON Schemas, etc.)

•Familiarity with data serialization with Protofbuf

•Experience with some API gateway is a must

•Strong understanding of performance optimization, scalability, and reliability for APIs

•Experience with observability, monitoring, and troubleshooting for backend services

•Strong collaboration and alignment skills across disciplines

•Willingness to learn, share knowledge, and adapt to evolving technologies

•System design skills and awareness of technical debt and tradeoffs

•Excellent communication, documentation, and stakeholder management abilities

•Comfort with ambiguity, discovery, and rapid change

•Commitment to engineering excellence, security, and responsible practices

Preferred Qualifications

•7+ years of hands-on API or backend engineering experience, with 2+ years in a technical leadership role

•Track record of architecting and delivering scalable, reliable API systems

•Experience with modern development practices (CI/CD, automated testing, code reviews)

•Demonstrated ability to mentor and grow engineers

•Experience working in cross-functional, agile teams

Highly Desirable

•Experience with API gateways (e.g., Envoy, Kong, Apigee) and service mesh patterns (e.g., Istio)

•Experience with event-driven and streaming architectures (pub/sub, callbacks, Kafka, etc.)

•Experience with cloud-native infrastructure and automated provisioning (e.g., Terraform)

•Experience building developer portals and self-service onboarding for APIs

•Experience with API Gateways (Apache APISIX, KrakenD, …)

•Ability to perform API Domain Modelling with a strong product orientation, aligning technical design with user and business needs

•Experience thriving in fast-paced, ambiguous environments and balancing rapid delivery with technical excellence

•Experience leading or working with distributed, multidisciplinary teams

Success Metrics

•API response time (median and p95)

•Uptime and reliability of critical services

•Test coverage for API and backend logic

•Developer velocity and time from API design to production

•Time to First Prototype (TTFP)

•Integration lead time for API consumers

•Technical debt reduction and architectural alignment

•Team growth, engagement, and retention

•Stakeholder satisfaction and cross-team collaboration

� � What You’ll Do

• Build and scale backend services using Java & Spring Boot

• Work on API integrations (REST, SOAP), caching & rate limiting

• Contribute across the full SDLC – design, development, testing & deployment

• Solve problems around performance, scalability & reliability

� � What We’re Looking For

• Strong knowledge of Data Structures & Algorithms

• Experience with Java, Spring Boot, REST/SOAP

• Hands-on with system & solution design

• Database experience: MongoDB / PostgreSQL / MySQL / Oracle

• Good debugging skills & unit testing

• Familiarity with Git and AI coding assistants (Copilot, Claude, etc.)

Xoxoday is looking for a candidate who has a strong background in the design and implementation of scalable architecture and a good understanding of Algorithms, Data structures, and design patterns. Candidates must be ready to learn new tools, languages, and technologies

Basic Qualifications:

• At least 4 -7 years of experience as a software developer.
• At Least 3 years of experience in .net core C#, aws stack, ms sql server, mvc, nodejs experience is a plus
• Strong working knowledge in distributed event-driven messaging architecture/platform
• Strong knowledge in data access layer especially ability to work with stored procedure
• Established and stimulated software development standards and processes along with best practices for delivery of scalable and high-quality software.
• Production experience with AWS stack
• Fluent English speaker

Preferred Qualifications:

• Experience working with OOP languages.
• Experience designing and developing Microservices and SOA.
• Experience working with AWS Kinesis, Lambda, SQS, S3, ElastiCache, ElasticSearch, Kubernetes, EventBridge, RDS, CloudWatch, APIGateway
• Experience designing and building high-performance scalable web services.
• Experience in REST API design and implementation.
• Experience in unit testing, test automation, and continuous delivery.
• Experience with stream-processing and message-broker software.

Nice to have:

• Experience working with distributed teams.
• Ability to work independently and as part of a team.
• Ability to work quickly toward tight deadlines, and make smart tradeoffs between speed, accuracy, and maintainability.
• Bachelor's or Master's degree in computer science (or equivalent professional experience).

A wholesome opportunity in a fast-paced environment that will enable you to juggle between concepts, yet maintain the quality of content, interact, and share your ideas and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at Xoxoday.

Xoxoday is a rapidly growing fintech SaaS firm that propels business growth while focusing on human motivation. Backed by Giift and Apis Partners Growth Fund II, Xoxoday offers a suite of three products - Plum, Empuls, and Compass. Xoxoday works with more than 2000 clients across 10+ countries and over 2.5 million users. Headquartered in Bengaluru, Xoxoday is a 300+ strong team with four global offices in San Francisco, Dublin, Singapore, New Delhi.

We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We however assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.

Job description

Key Responsibilities

• Design, develop, and maintain serverless applications using AWS services such as Lambda, API Gateway, DynamoDB, and S3.
• Collaborate with front-end developers to integrate user-facing elements with server-side logic.
• Build and maintain RESTful APIs to support web and mobile applications.
• Implement security best practices for AWS services and manage IAM roles and policies.
• Optimize application performance, scalability, and reliability through monitoring and testing.
• Write clean, maintainable, and efficient code following best practices and design patterns.
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot and debug applications, identifying performance bottlenecks and areas for improvement.
• Stay updated with emerging technologies and industry trends related to serverless architectures and Python development.

Qualifications

• Bachelors degree in Computer Science, Engineering, or related field, or equivalent experience.
• Proven experience as a Python backend developer, with a strong portfolio of serverless applications.
• Proficiency in AWS services, particularly in serverless architectures (Lambda, API Gateway, DynamoDB, etc.).
• Solid understanding of RESTful API design principles and best practices.
• Familiarity with CI/CD practices and tools (e.g., AWS CodePipeline, Jenkins).
• Experience with containerization technologies (Docker, Kubernetes) is a plus.
• Strong problem-solving skills and the ability to work independently and collaboratively.
• Excellent communication skills, both verbal and written.

Preferred Skills

• Experience with frontend technologies (JavaScript, React, Angular) is a plus.
• Knowledge of data storage solutions (SQL and NoSQL databases).
• AWS certifications (e.g., AWS Certified Developer Associate) are a plus.

Job Title: Backend Developer

Job Description: We are seeking a skilled Backend Developer to join our dynamic team. The ideal candidate will be responsible for designing, implementing, and maintaining the server-side logic, databases, and APIs of our applications. Key responsibilities include collaborating with cross-functional teams to develop scalable and efficient backend systems, troubleshooting and resolving issues, and staying updated on industry trends. Proficiency in programming languages such as Python, Java, or Node.js, along with experience in database management and API development, are essential for success in this role. Strong problem-solving skills, attention to detail, and a passion for creating robust and high-performance backend solutions are highly valued.

Requirements:

Proficiency in one or more backend programming languages (e.g., Python, Java, Node.js)

Experience with database management systems (e.g., MySQL, PostgreSQL, MongoDB)

Knowledge of RESTful API design and development

Familiarity with cloud services (e.g., AWS, Azure) is a plus

Strong problem-solving and troubleshooting skills

Collaborative mindset with excellent communication skills

Ability to work in a fast-paced and dynamic environment

Required skills:-

• 2+ years of experience in the Development of JAVA technology.
• Strong Java Basics
• SpringBoot or Spring MVC
• Hands-on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
• Proficient in REST API development
• Messaging Queue (RabitMQ or Kafka)
• Microservices
• Any Caching Mechanism
• Good at problem-solving

Good to Have Skills:

• 2+ years of experience in using Java/J2EE tech stacks
• Good understanding of data structures and algorithms.
• Excellent analytical and problem solving skills.
• Ability to work in a fast-paced internet start-up environment.
• Experience in technical mentorship/coaching is highly desirable.
• Understanding of AI/ML algorithms is a plus.

Requirements

• 2-5 years of experience as a back-end developer
• Expertise with Java 1.8 and React JS
• Understanding of OOPS concepts, Design Principles, and implementations of different types of Design Patterns.
• Should have a strong acumen in Data Structures, Algorithms, problem-solving.
• Experience in Microservices
• Extensive experience in developing Web Services APIs using RESTful API design
• Comfortable writing Unit Test Cases
• Good to have experience/knowledge of
  • Docker,
  • Scala,
  • Python, and
  • AWS and other Cloud platforms
• Able to connect the dots between code and business value

Responsibilities

• Engage in high-level conversations about business strategy and the role tech plays in it
• Write well-designed, testable, and efficient code that powers our application
• Write specs and do planning for everything we build
• Conduct application analysis, testing, and debugging
• Diligently document code to keep it clean and transparent
• Ensure cross-browser and device compatibility

You Are

• You believe it’s always on you to make sure anything you do is a success.
• You have the ability to make quick and effective decisions.
• In love with a challenge. You revel in solving problems and want a job that pushes you out of your comfort zone.
• Open to change. You’re inspired by the endless ways in which everything we do can always be improved.