Backend Api Engineer Jobs

About Voyage AI Team at MongoDB Voyage AI team in MongoDB is building a best-in-class, general-purpose, domain-specific, and fine-tuned embedding models and rerankers to enable accurate, efficient unstructured data search and retrieval for RAG, recommendation, semantic search, and more. It is backed by a strong team of AI researchers from Stanford, MIT, Berkeley, Princeton, and CMU, who have conducted over five years of cutting-edge research on training embedding models. Voyage AI was acquired by MongoDB recently, and is now integrating the SOTA embedding models with MongoDB's data platform to create powerful end-to-end solutions. Position Overview We are seeking a Senior Research Scientist to join our team and contribute to the development of next-generation AI models. This position offers a unique opportunity to work on challenging problems at the intersection of machine learning research and practical deployment of large neural networks. We are looking to speak to candidates who are based in Palo Alto for our hybrid working model. Responsibilities Conduct cutting-edge research in artificial intelligence, from frontier LLMs to embedding models and rerankers Innovate in next-generation information retrieval and LLM agent paradigm Collaborate closely with other research scientists and research engineers as well as peers across the organization Qualifications PhD degree in Computer Science or related field Strong background in machine learning, deep learning, and natural language processing Familiarity with training distributed training of neural networks for language and visual understanding What We Offer Opportunity to work on real-world problems at the cutting edge of AI research Opportunity to utilize research vision to innovate the entire company and make real-world impact Exposure to the full lifecycle of AI model development, from research to production Our compensation (base + equity) for this position is competitive with frontier AI labs About MongoDB

Role Description We’re looking for a n experienced Compensation Business Partner to join our Compensation Team. We collaborate with HR partners and business leaders to d esign and implement compelling compensation prog rams . We advise on complex compensation matters with in-depth analytics and strategic alignment to business goals. In this role, y ou will be client-facing and serve as a trusted partner to senior leadership t o support their unique needs. Responsibilities Drive Dropbox’s compensation philosophy, design and programs for your client teams . Build a consultative and collaborative relationship with HR business partners , business leaders , and executive leadership on compensation programs evolution and compensation initiatives. Act as a trusted advisor on compensation decisions. Support decisions with sound judgement and data-backed recommendations. Proactively r esearch compensation best practices and trends . P erform analysis on effectiveness, competitiveness and fairness of existing programs. Present findings and thoughtful alternative solutions that are aligned with Dropbox’s philosophy. Contribute to the design, delivery, and continuous improvement of enterprise-wide compensation programs and processes, including job architecture, market benchmarking, compensation review cycles, and global compensation practices. Design and implement programs with an understanding of fulfilling business need and impact on global employee base. Build and d eliver compensation - related training and education materials to your client teams. Work with the R ecruiting team to deliver a delightful new hire process by applying Dropbox compensation policies in fair and equitable ways . This includ es new hire offer package consultation to ensure alignment to market and internal peers . Requirements BA/BS in related field 7+ years of experience in-house or advising, preferably for the technology industry or compensation consulting firm Experience with job evaluation

Role Description We’re looking for a n experienced Compensation Business Partner to join our Compensation Team. We collaborate with HR partners and business leaders to d esign and implement compelling compensation prog rams . We advise on complex compensation matters with in-depth analytics and strategic alignment to business goals. In this role, y ou will be client-facing and serve as a trusted partner to senior leadership t o support their unique needs. Responsibilities Drive Dropbox’s compensation philosophy, design and programs for your client teams . Build a consultative and collaborative relationship with HR business partners , business leaders , and executive leadership on compensation programs evolution and compensation initiatives. Act as a trusted advisor on compensation decisions. Support decisions with sound judgement and data-backed recommendations. Proactively r esearch compensation best practices and trends . P erform analysis on effectiveness, competitiveness and fairness of existing programs. Present findings and thoughtful alternative solutions that are aligned with Dropbox’s philosophy. Contribute to the design, delivery, and continuous improvement of enterprise-wide compensation programs and processes, including job architecture, market benchmarking, compensation review cycles, and global compensation practices. Design and implement programs with an understanding of fulfilling business need and impact on global employee base. Build and d eliver compensation - related training and education materials to your client teams. Work with the R ecruiting team to deliver a delightful new hire process by applying Dropbox compensation policies in fair and equitable ways . This includ es new hire offer package consultation to ensure alignment to market and internal peers . Requirements BA/BS in related field 7+ years of experience in-house or advising, preferably for the technology industry or compensation consulting firm Experience with job evaluation

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies - from the world's largest enterprises to the most ambitious startups - use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. What you'll do We're looking for an experienced writer to develop data-backed theses and original content pieces around emerging technologies and market trends. In this role, you'll collaborate closely with contributors across the product marketing, product, engineering, and demand generation teams to produce compelling content that engages and informs our audience. This is a unique opportunity for a collaborative writer who excels at translating complex concepts in fintech, B2B technology, AI, and crypto into accessible insights. Responsibilities • Own 3–4 focus areas across industries, emerging technologies, and Stripe product pillars, working closely with product marketing to ensure that our content reflects the latest news and product enhancements • Coordinate with the demand generation team to identify opportunities for new editorial series and research agendas • Pioneer new content formats for Stripe, including short-form content and multimedia projects that grow our audience • Partner with the data science team and third-party agencies to surface relevant insights for existing and potential customers • Ensure consistency and tone in messaging across Stripe channels, including blogs, guides, reports, and social-native content • Manage a pipeline of content, ensuring clear communication and visibility across the organization Who you are We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these re

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies from the world's largest enterprises to the most ambitious startups use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. About the team The Startup Account Executive team within our New Business Sales function and is responsible for closing net-new accounts for Stripe. You have the opportunity to sell the entire suite of Stripe products and run the full sales cycle through onboarding. What you'll do As a Startup Account Executive at Stripe, you'll drive future growth by building relationships with founders of the fastest-growing venture-backed companies. You'll manage inbound leads and the full sales cycle through onboarding, turning them into happy Stripe users. Responsibilities Identify high-potential prospective startups and use effective prospecting strategies to generate leads that drive net-new revenue growth in your territory Develop and implement scaled sales strategies for acquiring new customers and driving adoption of Stripe products across new accounts Identify and understand users' pain points to propose Stripe solutions and own the full sales cycle, from business case development to close Work cross-functionally to solve user pain points and improve our product to better serve new customer needs Attend startup events across ANZ Lead and contribute to team projects to develop and refine our sales process, including engaging with accelerators and VC firms Engage with Product, Marketing, and User Operations teams to help amplify our growth trajectory Who you are We're looking for someone who meets the minimum requirements to be considered for the role. If you meet

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world's largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. About the team The Startups team is dedicated to winning all top venture capital-backed startups in India. We achieve this by combining subject-matter expertise with robust collaboration within the startup ecosystem. Our focus is on identifying and partnering with high-potential startups, assisting them in monetizing their products, scaling globally, and creating new revenue streams. You have the opportunity to sell the entire suite of Stripe products and run the full sales cycle through onboarding. What you'll do In this role, you'll create partnerships between Stripe and founders of the most innovative and fastest-growing startups in India by helping them to understand how the Stripe financial infrastructure and solutions can support their growth ambitions and create a competitive advantage for their businesses. As an Account Executive on the Startups team, you'll identify new opportunities for startups to get the most out of the growing Stripe products suite by thoroughly understanding their needs and advising them on how to leverage market-leading financial solutions to their own advantage. You'll create and drive campaigns to build new sales pipelines and work with our users on increasing their Stripe adoption. We're looking for a well-rounded strategic seller who can build strong relationships with Stripe users and manage high-velocity deal cycles. Our startup users are some of the most ambitious and demanding customers, and a successful candidate wi

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world’s largest enterprises to the most ambitious startups—use Stripe to accept payments, grow revenue, and unlock new business opportunities. Our mission is to increase the GDP of the internet. There is an enormous amount of work ahead, and an opportunity to do some of the most meaningful work of your career. About the team The Funded Startups team partners with the most promising venture-backed startups across EMEA. We combine deep knowledge of Stripe’s products with strong relationships across the startup ecosystem to help founders build, monetize, and scale their businesses globally. Our work brings the next generation of high-potential businesses to Stripe and helps them create sustainable growth—directly advancing Stripe’s mission to increase the GDP of the internet. What you’ll do As an Account Executive on the Funded Startups team, you will build partnerships with some of Italy’s most innovative and fast-growing venture-backed startups. You will help founders and operators understand how Stripe’s financial infrastructure can support their growth ambitions, unlock new revenue streams, and create an advantage in their markets. You will own a high-velocity sales motion from prospecting through close, while developing a strong understanding of each user’s business, technical environment, and priorities. You will identify opportunities for users to adopt more of Stripe’s product suite, create and execute campaigns that build new pipeline, and partner cross-functionally to set users up for long-term success. Responsibilities Identify and qualify high-potential venture-backed startups through inbound leads and proactive outbound prospecting. Own the full sales cycle, from first engagement to closing Build and execute territory and account plans that drive new business, product adoption, and sustained user value. Develop a deep understanding of users’

At Bolna, we’re building tools that change the way teams leverage Voice AI. We’re looking for a Founding Machine Learning Engineer to own the end-to-end lifecycle of building, evaluating, deploying, and improving models that power millions of production conversations. This is a high-impact, high ownership role where you won’t just work on Bolna’s ML stack—you’ll help build the foundation it scales on. Our team includes IIT alumni with experience at Bain, Atlassian, Uber, Zomato, and LinkedIn, and is backed by leading investors. Responsibilities: Build the data engine - Design pipelines to source and clean conversational voice data across Indian languages, accents, and telephony conditions. Fine-tune models that ship - Fine tune and train models to improve accuracy, speed, and reliability across different use-cases. Define what "good" means - Build evaluation datasets and benchmarks for transcription accuracy, voice naturalness, interruption handling, latency, and end-to-end conversation quality. Set up human-in-the-loop pipelines to capture subjective quality at scale. Ship to production - Work with the engineering team to deploy models into a latency-sensitive, high-volume system. Monitor performance in the wild, debug regressions, and iterate fast. Required Skills: 3+ years of hands-on ML experience with deep practical real-world experience in training models. Strong Python and PyTorch fundamentals with exposure in distributed training, and modern fine-tuning techniques (LoRA, QLoRA, DPO, RLHF, etc.). Training data as a first-class problem. Experience designing data pipelines from collection, cleaning, labeling, deduplication, augmentation and treating data quality as a core engineering discipline. Rigorous about evaluation. You know that "looks good in a demo" is not a benchmark. You build the evals before you trust the model. Speech model experience is a plus with real-time / streaming inference experience where you would have contributed to latency optimization

About Bolna Bolna is Voice AI infrastructure built for India. We help businesses deploy intelligent voice agents that can call, converse, and convert in any language, at scale. From collections to customer support to sales, our agents handle millions of conversations so humans don't have to. We're a YC F25 company, backed by General Catalyst, with 1,050+ paying customers and growing fast. Our team of ~25 is based in Bengaluru. The Role You're the person who makes our voice agents actually sound good and actually work for real customers. As an AI Solutions Engineer, you'll sit at the intersection of our product and our customers. Your primary job is to design, write, and iterate on the prompts and tools that power Bolna's voice agents, making them smarter, more natural, and more effective for each use case. You'll work closely with customers to understand their goals, build agent flows, test conversations, and fix what breaks. No heavy coding required-if you can vibe-code a basic script or write a solid system prompt, you're qualified. What You'll Do Write, test, and iterate on system prompts for voice agents across industries like D2C, fintech, healthcare, and logistics Listen to real call recordings, identify where agents fail, and fix them Build conversation flows and call pathways for new customer deployments Help onboard new customers-understand their use case, set up their agent, and get it live Maintain a growing library of prompts, templates, and best practices across Bolna's verticals Red-team agents-try to break them, find edge cases, and make them bulletproof Work with vernacular inputs: test agents in Hindi, Hinglish, and regional languages Feed insights back to product and engineering-you'll see what customers need before anyone else does What We're Looking For Must-have: You've spent serious time prompting ChatGPT, Claude, or similar LLMs-not just casually, but to actually build or solve something You're obsessive about language-you notice when a senten

About the Team At OpenAI, we’re building the connective tissue between our mission and our people. People Innovation Labs is a fast-moving engineering team embedded in the People organization, focused on rethinking how we find and retain the best talent and empower everyone to do their best work. From recruiting to culture, we’re designing systems that give our People Team a significant edge by infusing OpenAI’s models and first-principles thinking into every aspect of our work. Our projects range from greenfield 0-1 products like OpenHouse (our internal knowledge hub) to AI-powered automations and scalable recruiting tools. We’re defining the future of work at OpenAI, creating a blueprint for how AI can supercharge productivity, culture, and innovation. About the Role We’re seeking a Data Engineer to build data-intensive systems that will power People Innovation Labs’ internal products and enable the People Analytics function to do their best work. These data pipelines are crucial for our build-out of people products backed by business systems of record and for ongoing people data analytics. One example of an employee-facing product you’ll help us build is OpenHouse, which serves as a culture and communication hub and an organization-wide front door into all other aspects of People Innovation Labs’ work. OpenHouse and other products in our portfolio are built by full stack product engineers who are deeply curious about culture, recruiting and people development, and want to know everything from the business strategy and metrics down through the code that gets us there. In this role, you will work with People Innovation Labs leadership and software engineers and the People Analytics team to build the data systems that enable this work. In this role, you will: Design, build and manage people data pipelines, ensuring all data is seamlessly integrated into our Databricks warehouse. Develop canonical datasets to track key people metrics and People Innovation Labs produc

About the Team OpenAI’s mission is to ensure that general-purpose artificial intelligence benefits all of humanity. We believe that achieving our goal requires real world deployment and iteratively updating based on what we learn. The Protection Scientist Engineer, Integrity team supports this by identifying and investigating misuses of our products – especially new types of abuse. This enables our partner teams to develop data-backed product policies and build scaled safety mitigations. Precisely understanding abuse allows us to safely enable users to build useful things with our products. About the Role Protection Science Engineering is an interdisciplinary role mixing data science, machine learning, investigation, and policy/protocol development. As a Protection Scientist Engineer within Integrity and Investigations, you will be responsible for designing and building systems to proactively identify and enforce on abuse on OpenAI’s products. This includes ensuring we have robust abuse monitoring in place for new products, sustaining monitoring for existing products, and prototyping and incubating systems of defense against our highest risk harms. You will also respond to and investigate critical escalations, especially those that are not caught by our existing safety systems. This will require expert understanding of our products and data, and involves working cross-functionally with product, policy, and engineering teams. This role is based in our London office and includes participation in an on-call rotation that will involve resolving urgent escalations outside of normal work hours. Some investigations may involve sensitive content, including sexual, violent, or otherwise-disturbing material. In this role, you will: Scope and implement abuse monitoring requirements for new product launches. Improve processes to sustain monitoring operations for existing products, including developing approaches to automate monitoring subtasks. Prototype and mature into product

About the Team OpenAI’s mission is to ensure that general-purpose artificial intelligence benefits all of humanity. We believe that achieving our goal requires real world deployment and iteratively updating based on what we learn. The Protection Scientist Engineer, Integrity team supports this by identifying and investigating misuses of our products – especially new types of abuse. This enables our partner teams to develop data-backed product policies and build scaled safety mitigations. Precisely understanding abuse allows us to safely enable users to build useful things with our products. About the Role Protection Science Engineering is an interdisciplinary role mixing data science, machine learning, investigation, and policy/protocol development. As a Protection Scientist Engineer within Integrity and Investigations, you will be responsible for designing and building systems to proactively identify and enforce on abuse on OpenAI’s products. This includes ensuring we have robust abuse monitoring in place for new products, sustaining monitoring for existing products, and prototyping and incubating systems of defense against our highest risk harms. You will also respond to and investigate critical escalations, especially those that are not caught by our existing safety systems. This will require expert understanding of our products and data, and involves working cross-functionally with product, policy, and engineering teams. This role can be based in either our San Francisco, or NY office and includes participation in an on-call rotation that will involve resolving urgent escalations outside of normal work hours. Some investigations may involve sensitive content, including sexual, violent, or otherwise-disturbing material. In this role, you will: Scope and implement abuse monitoring requirements for new product launches. Improve processes to sustain monitoring operations for existing products, including developing approaches to automate monitoring subtasks. Prototyp

About Ema Ema is building the world’s leading Agentic AI platform to transform enterprise productivity. We enable organizations to delegate repetitive tasks to Ema, the Universal AI Employee, delivering 10x gains in workforce efficiency, across functions. Founded by former executives from Google, Coinbase, Flipkart, and Okta, our team includes engineers from premier tech companies and graduates of Stanford, MIT, UC Berkeley, CMU, and IITs. We are backed by industry leading investors including Accel, Naspers/Prosus, Section32, and angels like Sheryl Sandberg and Dustin Moskovitz. Headquartered in Silicon Valley and with offices in London, Bangalore and Vancouver, Ema is at the frontier of what Agentic AI can do in production — we ship real systems that run real business processes at scale. Role Overview As Chief of Staff to the CEO, you will be the strategic nerve center of the entire company — a true force-multiplier to Surojit Chatterjee (ex CPO Coinbase, VP Products at Google). Reporting directly to the CEO and based in Mountain View, CA (full co-location required), you will own the translation of the CEO's vision across Sales, Product, and the full organizational agenda — serving as connective tissue between the CEO and every critical function: EPD, GTM, Finance, HR, Legal, and the Board. This is a senior operating role for someone who has already done it — led strategy at scale, driven GTM at a high-growth technology company, and earned their stripes as an Engagement Manager or Associate Principal at a top-tier consulting firm (McKinsey, BCG, Bain) before stepping into industry. You are not here to learn the ropes; you are here to pull them. Ema is backed by top-tier investors (Accel, Section 32, and Prosus) and is building the Universal AI Employee for enterprises worldwide. This is a high-visibility, high-impact role at one of the most consequential AI companies in the world. Key Responsibilities CEO Leverage & Executive Operations Serve as Surojit's strat

About Ema Ema is building the world’s leading Agentic AI platform to transform enterprise productivity. We enable organizations to delegate repetitive tasks to Ema, the Universal AI Employee, delivering 10x gains in workforce efficiency, across functions. Founded by former executives from Google, Coinbase, Flipkart, and Okta, our team includes engineers from premier tech companies and graduates of Stanford, MIT, UC Berkeley, CMU, and IITs. We are backed by industry leading investors including Accel, Naspers/Prosus, Section32, and angels like Sheryl Sandberg and Dustin Moskovitz. Headquartered in Silicon Valley and with offices in London, Bangalore and Vancouver, Ema is at the frontier of what Agentic AI can do in production — we ship real systems that run real business processes at scale. Who you are We're looking for an innovative and passionate Machine Learning Engineers to join our team. You are someone who loves solving complex problems, enjoys the challenges of working with huge data sets, and has a knack for turning theoretical concepts into practical, scalable solutions. You are a strong team player but also thrive in autonomous environments where your ideas can make a significant impact. You love utilizing machine learning techniques to push the boundaries of what is possible within the realm of Natural Language Processing, Information Retrieval and related Machine Learning technologies. Most importantly, you are excited to be part of a mission-oriented high-growth startup that can create a lasting impact. You will: Conceptualize, develop, and deploy machine learning models that underpin our NLP, retrieval, ranking, reasoning, dialog and code-generation systems. Implement advanced machine learning algorithms, such as Transformer-based models, reinforcement learning, ensemble learning, and agent-based systems to continually improve the performance of our AI systems. Lead the processing and analysis of large, complex datasets (structured, semi-structured, and

About Ema Ema is building the world’s leading Agentic AI platform to transform enterprise productivity. We enable organizations to delegate repetitive tasks to Ema, the Universal AI Employee, delivering 10x gains in workforce efficiency, across functions. Founded by former executives from Google, Coinbase, Flipkart, and Okta, our team includes engineers from premier tech companies and graduates of Stanford, MIT, UC Berkeley, CMU, and IITs. We are backed by industry leading investors including Accel, Naspers/Prosus, Section32, and angels like Sheryl Sandberg and Dustin Moskovitz. Headquartered in Silicon Valley and with offices in London, Bangalore and Vancouver, Ema is at the frontier of what Agentic AI can do in production — we ship real systems that run real business processes at scale. Role Overview We’re looking for a Field Marketing Manager to own and execute Ema’s on-the-ground presence at industry events, tradeshows, executive dinners, and sponsored programs across the United States. You’ll be the connective tissue between our BDR, Sales, AI Strategy, Product Marketing, and Design teams — turning live experiences into qualified pipeline. This is a high-impact, high-visibility role at a fast-growing AI company. Our Marketing Lead owns the event strategy; you own the execution engine that brings it to life. We need someone who thrives in startup environments, moves fast, and doesn’t wait for permission to solve problems. If you’ve built field marketing programs from scratch, know how to get scrappy when budgets are tight, and can run a flawless booth one day and a packed executive dinner the next — we want to talk to you. Key Responsibilities Event Execution & Operations Plan, manage, and execute end-to-end logistics for industry conferences, tradeshows, and Ema-hosted events (executive roundtables, dinners, meetups) across the US. Manage all on-site operations: booth design, staffing, signage, swag, shipping, A/V, catering, and speaker logistics. You’re th