Bolna AI

Lead Backend Engineer (India)

Bolna is the #1 Voice API infrastructure platform for India, used by thousands of developers, from indie hackers to post-IPO enterprises. We are seeking a Lead Backend Engineer to architect and scale the core systems of our real-time voice AI platform. This high-impact role involves shaping the product's foundation, ensuring reliability, scalability, and performance within our fast-growing YC F25 startup with a lean team.

<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">About Bolna AI</h3>Bolna is the #1 Voice API infrastructure platform for India – used by thousands of developers.We have customers ranging from indie hackers to fast growing startups to post-IPO enterprises.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">About the role</h3>Skills: Python, Amazon Web Services (AWS), Nginx, Google Cloud, PostgreSQLAt Bolna, we’re building tools that change the way teams leverage Voice AI.We’re looking for a Lead Backend Engieer to architect and scale the core systems powering our real-time voice AI platform.This is an early, high-impact role where you’ll shape the foundation of our product and directly influence its reliability, scalability, and performance.We’re a YC F25 startup growing at rocket speed with a lean team of <10 builders.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Looking for:</h3>Founding Backend or Infrastructure engineers that have build scaleable systems. Candidates who have led or contributed to the 0 → 1 or 1 → 10 journey and thrived in startup environments, such as ex-founders or founding engineers. Have previously been in a fast growing & scaling team.Great at communications and fun to work with.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Responsibilities:</h3>1. Architect and scale our core Voice AI platform leveraging FastAPI, WebSockets, and Kubernetes.2. Develop high-performance, event-driven architectures to power our core orchestration platform.3. Oversee infrastructure scalability and observability, ensuring reliability, resilience, and smooth system operations.4. Maintain and evolve the API platform that powers conversations, ensuring reliability, low latency, and seamless integrations with client applications.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Required Skills:</h3>1. 5+ years of backend engineering experience with Python.2. Strong expertise in FastAPI, WebSockets, and event-driven architectures, with deep knowledge of asyncio and concurrency.3. Hands-on experience with Kubernetes, Docker, and cloud-based deployments.4. Solid understanding of PostgreSQL, Redis, and scalable data storage solutions.5. Proven track record in performance tuning and optimization for high-throughput, real-time systems.<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">BONUS: Demonstrated contributions to a Python project or open-source library.</li></ul>

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As an SDET-II at Interface.ai, you’ll be a cornerstone of our Quality Assurance team, driving the quality strategy for our cutting-edge Conversational AI platform that powers intelligent virtual assistants for financial institutions. You’ll lead the design, development, and implementation of advanced test automation frameworks, ensuring our AI-driven solutions are robust, scalable, and delightful for millions of users across the globe. This role involves defining comprehensive test strategies, building advanced automation frameworks beyond standard tools, creating innovative AI-specific testing approaches for NLP & Voice models, and taking end-to-end ownership of quality for critical initiatives. You will also mentor junior SDETs and collaborate with cross-functional teams to solve system-wide quality challenges.

Interface AI is a leading Conversational AI SaaS company focused on providing cutting-edge solutions to the financial services industry. We serve close to 100 financial institutions today. We are one of the fastest-growing AI + financial technology companies in the industry, and we were recently featured as one of the top 100 fastest-growing fintech companies in Silicon Valley. Our mission is to empower every financial institution to scale efficiently and help its customers achieve financial wellness.

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Lead DevOps / Platform Engineer

Senior Talent Sourcer

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Banking is being reimagined—and customers expect every interaction to be easy, personal, and instant.We are building a universal banking assistant that millions of U.S. consumers can use to transact across all financial institutions and, over time, autonomously drive their financial goals. Powered by our proprietary BankGPT platform, this assistant is positioned to displace age-old legacy systems within financial institutions and own the end-to-end CX stack, unlocking a $200B opportunity and potentially replacing multiple publicly traded companies.Ultimately, our mission is to drive financial well-being for millions of consumers.With over two-thirds of Americans living paycheck to paycheck, 50% holding less than $500 in savings, and only 17% financially literate, we aim to put financial well-being on autopilot to help solve this problem.As an SDET-II at Interface.ai, you’ll be a cornerstone of our Quality Assurance team, driving the quality strategy for our cutting-edge Conversational AI platform that powers intelligent virtual assistants for financial institutions. You’ll lead the design, development, and implementation of advanced test automation frameworks, ensuring our AI-driven solutions are robust, scalable, and delightful for millions of users across the globe.This isn’t just about writing test scripts—it’s about owning quality end-to-end. You’ll collaborate closely with our AI engineers, product teams, and platform architects to embed quality into every layer of our Agentic AI platform. From testing real-time interactions (like WebSockets and server-sent events) to ensuring the reliability of our Voice models and APIs, you’ll solve complex challenges at the intersection of AI and fintech.Our QA team is a tight-knit group passionate about delivering flawless experiences. We’re working on groundbreaking projects—like automating AI model validation and building self-service testing tools as platform services. If you thrive in a fast-paced environment, love mentoring engineers, and are excited to shape the future of AI in financial services, this role is for you.What You’ll Do<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Lead Test Strategy: Define and implement comprehensive test strategies for Interface.ai’s Conversational AI platform, covering functional, performance, security, and scalability aspects.</li><li class="leading-relaxed">Build Automation Frameworks: Design and develop advanced, reusable test automation frameworks beyond Selenium, PlayWright, TestNG, Appium or RestAssured. We focus on custom solutions tailored to our AI-driven workflows.</li><li class="leading-relaxed">AI-Specific Testing: Create innovative testing approaches for NLP & Voice models, intent recognition, and dialogue flows, ensuring our virtual assistants perform flawlessly under real-world conditions.</li><li class="leading-relaxed">Innovation: We truly believe the next chapter of test automation with AI tools is going to be revolutionary, you will be part of this innovation lab to redefine Quality assurance in the new world</li><li class="leading-relaxed">End-to-End Ownership: Take full ownership of quality for critical initiatives, from crafting detailed test plans to executing them across CI/CD pipelines (e.g., Jenkins, Github Actions).</li><li class="leading-relaxed">Mentor & Collaborate: Guide junior SDETs and developers in adopting AI tools and best practices, while partnering with cross-functional teams to solve system-wide quality challenges.</li><li class="leading-relaxed">Performance & Scale: Design and execute load, stress, and latency tests for our distributed systems, ensuring they withstand the demands of high-volume financial transactions.</li><li class="leading-relaxed">Documentation & Innovation: Maintain meticulous documentation of test architectures and lead POCs (Proof of Concepts) for new tools, frameworks, or languages to keep our QA practices cutting-edge.</li><li class="leading-relaxed">Proficiency in advanced prompt engineering, including designing, optimizing, and integrating LLM prompts into complex workflows and production systems.</li></ul>What You’ll Bring<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Experience: At least 3+ years in software testing, with 2+ years as an SDET building automation frameworks in a product or platform environment.</li><li class="leading-relaxed">Technical Expertise:</li><li class="leading-relaxed">High Proficiency in Java (or similar languages like Python) for test automation, with deep knowledge of design patterns and reusable components.</li><li class="leading-relaxed">Hands-on experience with testing tools like Selenium, Appium, RestAssured, TestNG, Cucumber, or equivalents.</li><li class="leading-relaxed">Strong understanding of microservices, REST APIs, and real-time systems (e.g., WebSockets, server-sent events).</li><li class="leading-relaxed">Familiarity with CI/CD pipelines (Jenkins, Github Actions) and containerized environments (Docker, Kubernetes).</li><li class="leading-relaxed">AI/Fintech Edge: Exposure to testing AI/ML systems (e.g., LLM, NLP, Chatbots) or fintech applications is a big plus.</li><li class="leading-relaxed">Leadership Skills: Proven ability to lead initiatives, mentor teams, and drive cross-team collaboration with compassion and clarity.</li><li class="leading-relaxed">Problem-Solving: A knack for tackling ambiguous, high-stakes challenges with a structured, innovative approach.</li><li class="leading-relaxed">Communication: Excellent written and verbal skills, with the ability to articulate complex technical concepts to diverse stakeholders.</li></ul><h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">Nice to Have</h4><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Experience with cloud platforms (AWS, GCP, Azure) and tools like Terraform or Ansible.</li><li class="leading-relaxed">Knowledge of security testing practices for financial systems (e.g., OWASP standards).</li><li class="leading-relaxed">Contributions to open-source testing tools or frameworks.</li></ul>#LI-SS1#LI-RemoteAt interface.ai, we are committed to providing an inclusive and welcoming environment for all employees and applicants. We celebrate diversity and believe it is critical to our success as a company. We do not discriminate on the basis of race, color, religion, national origin, age, sex, gender identity, gender expression, sexual orientation, marital status, veteran status, disability status, or any other legally protected status. All employment decisions at Interface.ai are based on business needs, job requirements, and individual qualifications. We strive to create a culture that values and respects each person's unique perspective and contributions. We encourage all qualified individuals to apply for employment opportunities with Interface.ai and are committed to ensuring that our hiring process is inclusive and accessible.Create a Job AlertInterested in building your career at Interface AI? Get future opportunities sent straight to your email.<a href="https://my.greenhouse.io/users/signin?jobboard=interfaceai&source=jobalertpost" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Create alert</a>Apply for this job------------------<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">indicates a required field</li></ul>Autofill with MyGreenhouseFirst Name*Last Name*Email*PhoneCountry*Phone*Resume/CV*AttachAttachEnter manuallyEnter manuallyAccepted file types: pdf, doc, docx, txt, rtfCover LetterAttachAttachEnter manuallyEnter manuallyAccepted file types: pdf, doc, docx, txt, rtf<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">* *</li></ul>LinkedIn ProfileWebsiteSubmit application

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! - This assessment gives us an idea of your problem solving skills using DSA- Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc.- 10 Multiple Choice questions

Data Structures and Algorithms

Let's assess your Programming Patterns! ????- This assessment gives us an idea of your code architecture skills- Companies that evaluate this skillset in interviews: Dirtcube, PTW, Playshifu, etc.

Programming Patterns

Let's assess your OOPs skills! ????- This assessment gives us an idea of your fundamental OOPS concepts and Solid principles skills- Companies that evaluate this skillset in interviews: Hitwicket, GSN Games, Tomo Club, etc.

Object Oriented Programming

Let's assess your Unity Skills ????- This assessment gives us an idea of your Unity fundamentals- Companies you can apply for after taking this assessment: Godspeed games, Salvation Games, nCore Games, etc.

Lead Backend Engineer (India)

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