
Senior Software Engineer (L4 - Tech Lead)
Because you belong at Twilio.
The Who, What, Why and Where
Twilio is growing rapidly and seeking a Staff Software Engineer to lead the design and implementation phases of cloud-based distributed systems built to seamlessly scale to several million transactions per day.
Who?
As a Staff, Software Engineer (L4 - Tech Lead) in the Account Security team, you will lead the design and implementation phases of cloud-based distributed systems built to seamlessly scale to several million transactions per day. Not only will you be responsible for tackling some of the most complex and exciting technical problems in the industry, you will also be sharing your technical expertise with other engineers and leading them through an accelerated learning process.
You are intrigued by the intersection of the cloud, telecommunications and security spaces, how to harness the power of SMS and voice to enable millions of consumers to securely sign up and sign in every day using the services from the global brands they trust. You enjoy the challenge of owning a mission critical service and engineering it to work reliably in any circumstance.
You are also passionate about collaborating with multiple R&D and product teams, crafting together microservices and APIs that developers around the world will demonstrate to deliver new applications. You have strong communication skills, and a belief that team output is more important than individual output.
Minimum Qualifications
- 7+ years of experience with at least two programming languages such as Java, Scala, Python, Ruby, JavaScript or Go.
- 5+ years of experience working with modern agile product development teams of engineers, product managers and designers.
- 5+ years of Experience with SQL/NoSQL technology such as PostgreSQL, MySQL, DynamoDB understanding common use cases and performance pitfalls
- 2+ years of Experience dealing with event-driven architectures and message brokers such as RabbitMQ, KAFKA, ActiveMQ, etc and an in depth understanding of their use cases and pitfalls
- Versed in concepts such as DDD, SOLID, Cloud Native Patterns, distributed systems and architecture. Capable of understanding pitfalls and anticipating common failure modes of a microservice environment.
- Experienced in implementing prototypes and in practices and concepts such as MVP, A/B testing and feature toggles for rolling-out features to production.
- Strong communication skills: able to communicate effectively with technical and non technical partners
- Bachelor’s degree in computer science or equivalent professional experience.
- Passion for new technologies and proven capability in analysis and problem-solving.
- Strong troubleshooting and monitoring skills with practical experience in modern tools such as Kibana, Datadog, PagerDuty or related.
Preferred Qualification
- Experience with https://stackshare.io/twilio/verify-telephony">our stack
- Track record as a full-stack engineer
- Experience with AWS related technologies
- Background in telecommunications domain
- Background in security domain
What?
- BE AN OWNER: Take full end-to-end ownership of your services, from designing to operations and monitoring in production.
- EMPOWER OTHERS: Provide a safe work environment that embraces failure as a way of learning and inspires our engineers to be inventive and motivated.
- NO SHENANIGANS: You always act in an honest, direct and transparent way and uphold our values.
- WEAR THE CUSTOMER’S SHOES: Besides technical excellence, always keep in mind what is the business problem we are trying to solve for our customers and how our decisions impact them.
- WRITE IT DOWN: Evaluate opportunities, risk and technical strategies and provide key findings to internal partners.
- RUTHLESSLY PRIORITIZE: Work in a fast paced environment. It is key for you to understand, document and define risks that drive and enhance the organization's ability to prioritize while advising the business of these priorities.
- BE BOLD: Drive architecture and building systems for multiple orders of magnitude of growth. Every big idea starts small: open up the boundaries and keep raising the bar as solving small problems can bring big results. Never settle and keep pushing yourself and the teams forward.
- BE INCLUSIVE: Coach, mentor and inspire engineering teams by building and ensuring a safe and inclusive environment where all voices can be heard.
- DRAW THE OWL: Influence teams to continuously be improving while supporting progressive ways to solve problems; adopt new technologies and strategies where applicable.
- DON’T SETTLE: Always look for the next opportunity for Twilio to improve our quality, reliability and security to continuously earn our customers trust.
Why?
Our developers build the leading Twilio Verify service used by millions of customers around the world. Every day we push the boundaries of web-scale service delivery, operating with utmost reliability the API services that secure the online presence of the biggest brands. We are passionate about crafting simple APIs that developers will love.
By joining us you will have the opportunity to work on the next generation of Twilio multi factor authentication and identity verification services with a team of forward-thinking and supportive professionals who will care about helping you on a successful career path. Twilio is truly unique; we are a company committed to your growth, your learning, your development, and your entire employee experience. We only win when our employees succeed, and we're dedicated to helping you develop your strengths. We have a cultural foundation built on diversity, inclusion, and innovation, and we want you and your ideas to thrive at Twilio.
Where?
This position will be located in our office in Bangalore, India. You will enjoy our office perks: catered meals, snacks, game room, ergonomic desks, massages, bi-weekly All Hands and more. What you will also get to experience is a company that believes in small teams for maximum impact; seeks well-rounded talent to ensure a full perspective on our customers’ experience, understands that this is a marathon, not a sprint; that continuously and purposefully builds an inclusive culture where everyone is able to do and be the best version of themselves.
About Us
Millions of developers around the world have used Twilio to unlock the magic of communications to improve any human experience. Twilio has democratized communications channels like voice, text, chat, video and email by virtualizing the world’s communications infrastructure through APIs that are simple enough for any developer to use, yet robust enough to power the world’s most demanding applications. By making communications a part of every software developer’s toolkit, Twilio is enabling innovators across every industry — from emerging leaders to the world’s largest organizations — to reinvent how companies engage with their customers.
Invest in weeks dedicated to tackling hard problems and creating your own ideas. We have a cultural foundation built on diversity, inclusion, and innovation, and we want you and your ideas to thrive at Twilio

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About the Job
As a Cloud Backend Engineer you will design, develop, and maintain scalable and reliable backend systems in cloud environments. You will be responsible for building cloud-native applications, optimizing backend performance, and ensuring seamless integration with frontend services and third-party systems.
What You’ll Be Doing
- Backend Development
- Design and implement scalable and high-performance backend services and APIs for cloud-based applications.
- Develop microservices architectures and serverless functions to support business needs.
- Ensure backend systems are secure, reliable, and performant, adhering to best practices and industry standards.
- Cloud Infrastructure and Deployment
- Build and manage cloud infrastructure using platforms such as AWS, Google Cloud Platform (GCP), or Azure.
- Deploy and maintain backend services using cloud-native technologies (e.g., Kubernetes, Docker, AWS Lambda, Google Cloud Functions).
- Implement and manage CI/CD pipelines to automate deployment processes and ensure smooth delivery of updates.
- Performance Optimization
- Monitor and optimize the performance of backend services, including database queries, API responses, and system throughput.
- Implement caching strategies, load balancing, and other performance-enhancing techniques to ensure scalability and responsiveness.
- Troubleshoot and resolve performance issues and system bottlenecks.
- Database Management
- Design and manage relational and NoSQL databases, ensuring data integrity, scalability, and performance.
- Implement data access patterns and optimize queries for efficient data retrieval and storage.
- Ensure backup, recovery, and data security practices are in place.
- Integration and Collaboration
- Collaborate with frontend developers, DevOps engineers, and other stakeholders to integrate backend services with frontend applications and third-party systems.
- Participate in architectural discussions and provide input on system design and technology choices.
- Ensure clear communication and documentation of backend services, APIs, and system interactions.
- Security and Compliance
- Implement security best practices to protect backend services from threats and vulnerabilities.
- Ensure compliance with relevant regulations and standards, including data privacy and protection requirements.
- Conduct regular security assessments and vulnerability scans to maintain system integrity.
- Testing and Quality Assurance
- Develop and maintain automated tests for backend services, including unit tests, integration tests, and end-to-end tests.
- Perform code reviews and participate in quality assurance processes to ensure high code quality and reliability.
- Monitor and address issues identified during testing and production deployments.
- Documentation and Knowledge Sharing
- Document backend services, APIs, and infrastructure setups to facilitate knowledge sharing and support.
- Create and maintain technical documentation, including architecture diagrams, API specifications, and deployment guides.
- Share knowledge and best practices with team members and contribute to a collaborative development environment.
What We Need To See
- Strong experience in backend development, cloud technologies, and distributed systems, with a focus on building robust, high-performance solutions.
- Minimum 5 years of experience in backend development, with a strong focus on cloud-based applications.
- Proven experience with cloud platforms (AWS, GCP, Azure) and cloud-native technologies.
- Experience in designing and implementing RESTful APIs, microservices, and serverless architectures.
- Technical Expertise in:
1. Backend Development
- Strong experience with backend programming languages such as Node.js, Python
- Expertise in working with frameworks such as NestJS, Express.js, or Django.
2. Microservices Architecture
- Experience designing and implementing microservices architectures.
- Knowledge of service discovery, API gateways, and distributed tracing.
3. API Development
- Proficiency in designing, building, and maintaining RESTful and GraphQL APIs.
- Experience with API security, rate limiting, and authentication mechanisms (e.g., JWT, OAuth).
4. Database Management
- Strong knowledge of relational databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g. MongoDB).
- Experience in database schema design, optimization, and management.
5. Cloud Services
- Hands-on experience with cloud platforms such as Azure,AWS or Google Cloud.
6. Performance Optimization
- Experience with performance tuning and optimization of backend services.
7. Security
- Understanding of security best practices and experience implementing secure coding practices.
- Soft Skills:
- Strong problem-solving skills and attention to detail.
- Excellent communication and collaboration skills, with the ability to work effectively in a team environment.
- Ability to manage multiple priorities and work in a fast-paced, dynamic environment.
Who we are looking for
A candidate who can design, build and configure applications to meet business process and application requirements.
Key Role Requirements:
- Experience in Java-J2EE Development
- Hands-on experience in Struts (Core Java, JSP, Servlets, EJB) framework.
- Hands-on experience in Oracle SQL, Procedures
- Hands-on experience in Spring boot, Spring batch
- Should have worked on application servers like IBM WAS / Jboss / Web logic.
- Knowledge of basic Linux commands and BIRT reporting tool is an added advantage.
- Knowledge in SVN or any other version control is an added advantage.
- Knowledge in Build tool like ANT, Maven is an added advantage
- Strong problem solving and analytical capabilities.
Key Responsibilities:
- Rewrite existing APIs in NodeJS.
- Remodel the APIs into Micro services-based architecture.
- Implement a caching layer wherever possible.
- Optimize the API for high performance and scalability.
- Write unit tests for API Testing.
- Automate the code testing and deployment process.
Skills Required:
- At least 3 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds.
- Excellent hands-on experience using MySQL or any other SQL Database.
- Good knowledge of MongoDB or any other NoSQL Database.
- Good knowledge of Redis, its data types, and their use cases.
- Experience with graph-based databases like GraphQL and Neo4j.
- Experience developing and deploying REST APIs.
- Good knowledge of Unit Testing and available Test Frameworks.
- Good understanding of advanced JS libraries and frameworks.
- Experience with Web sockets, Service Workers, and Web Push Notifications.
- Familiar with NodeJS profiling tools.
- Proficient understanding of code versioning tools such as Git.
- Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms.
- Should be a fast learner and a go-getter — without any fear of trying out new things Preferences.
- Experience building a large scale social or location-based app.
Hi,
Greetings from Kairos Technologies (http://www.kairostech.com">www.kairostech.com)
About Kairos:
Kairos Technologies is a customer-first technology services company focused on Digital Transformation and Testing/QA. We are founded to help you build world-class solutions and digital ecosystems. From our inception in 2003, we have provided managed services in embracing the digital transformation for various companies operating in different verticals. We strive to provide the technology services that make your business goals an economic reality.
As discussed please find the below Job description
We are looking for highly skilled programmers with experience building web applications in Java. Java Developers are responsible for analyzing user requirements and business objectives, determining application features and functionality, and recommending changes to existing Java-based applications, among other duties.
Java Developers need to compile detailed technical documentation and user assistance material, requiring excellent written communication.
Java Developer Responsibilities:
- Designing and implementing Java-based applications.
- Analyzing user requirements to inform application design.
- Defining application objectives and functionality.
- Aligning application design with business goals.
- Developing and testing software.
- Debugging and resolving technical problems that arise.
- Producing detailed design documentation.
- Recommending changes to existing Java infrastructure.
- Developing multimedia applications.
- Developing documentation to assist users.
- Ensuring continuous professional self-development.
- Skills Required: JAVA/J2EE technologies like Struts, Spring Boot, HTMLCSS, JSP, JDBC, Servlets, JSON, Eclipse, Apache Tomcat, Subversion, Springboot framework to build RESTful Web Services and Micro Services based Spring Cloud.
- Exp – 5+ years
- Location- Pan India
You will get to own and build world-class, stable, secure and scalable solutions
Ownership, trust and flexibility comes with the job and you are expected to consistently raise the bar in terms of technical proficiency and quality of code.
You will get to work with a highly experienced team in a very informal, yet results-oriented environment
You should think consumer-first and have the ability to work in a dynamic and fast-paced environment
You will actively participate in defining stable and scalable engineering processes to meet the demands of a fast growing team.
3+ years hands-on application development experience in Python, Django, Flask & NodeJS
Highly proficient in SQL and NoSQL databases and Redis.
Should have a strong hands-on working knowledge on AWS services like EC2, S3, Route53, SES, SQS, SNS etc.
Should have successfully built and deployed complex and resource efficient backend APIs that work flawlessly at scale
Should be willing to take on responsibility and ownership and should be highly motivated and fun to work with :)
Experience in working at fast-paced startups is a big plus!
If you have the knowledge, experience and hunger to make a positive impact, we’d love to meet you.
- Experience in Web and Mobile Applications.
- Agility and ability to adapt quickly to changing requirements and scope and priorities
- Strong proficiency with JavaScript (ECMAScript 5, 6)
- Knowledge of Node.js and frameworks available for it (SailsJS, Express)
- Understanding the nature of asynchronous programming and its quirks and workarounds.Familiarity with front-end technologies.
- User authentication and authorization between multiple systems, servers, and environments.
- Interaction with multiple data sources.
- Good understanding of SQL syntax.
- Understanding fundamental design principles behind a scalable application.
- Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform.
- Implementing automated testing platforms and unit tests.
- Proficient understanding of code versioning tools, such as Git.
- Knowledge in the field of IOT is good to have.
- should have at least 5 years of hands-on experience in backend software development using Java.
- should have proven expertise in Spring Boot REST/Microservices.
- should have used design patterns like MVP, MVC or MVVM and should know when to use which.
- should have working experience with relational and NoSQL databases.
- should have multiple years of experience with cloud application design and in one or more reputable cloud platform providers (e.g. AWS, GCP, Microsoft Azure … )
- should have professional experience working in an agile development environment.
- should have strong communication skills and like making decisions.
- should follow good software engineering principles such as TDD, writing modular, maintainable and clean code










