Senior Software Developer - Backend for AI Platform

Cresta is dedicated to transforming every customer interaction into a strategic advantage by harnessing the full potential of contact centers. Our innovative platform seamlessly integrates advanced AI with human intelligence, enabling contact centers to uncover customer insights, streamline conversations, and optimize workflows. With roots in the esteemed St…

Cresta is dedicated to transforming customer interactions into a strategic advantage by harnessing the full potential of contact centers. Our innovative platform integrates advanced AI technologies with human intelligence to reveal customer insights, streamline conversations, and enhance operational efficiency, allowing teams to work more effectively. Founded by Sebastian Thrun, a visionary from the Stanford AI lab and the mind behind Google X and Waymo, our leadership team also features CEO Ping Wu, a co-founder of Google Contact Center AI, and Tim Shi, an early member of OpenAI. Join us on an exciting journey to redefine the future of work through AI innovation. The revolution begins at Cresta. About the Role: The AI Agent team at Cresta is committed to developing leading-edge AI Agents that tackle real-world challenges for our clients. We focus on utilizing the latest advancements in Large Language Models (LLMs) and AI Agent systems while ensuring our solutions are secure, cost-effective, and dependable. This role offers hands-on involvement with pioneering projects, requiring innovative software engineers who can translate research into scalable, practical applications. As a Senior Software Engineer, your mission will be to ensure our AI Agents are powered by dependable and scalable server solutions. This encompasses designing and maintaining server architecture capable of managing high-volume interactions while guaranteeing optimal performance and availability. While our emphasis is on server optimization and data management rather than pure research, you will engage with cutting-edge technologies in the cloud and server domains. This is a rare opportunity to influence the AI landscape at Cresta by addressing complex challenges and implementing groundbreaking advancements in production settings.

At Affirm, we are transforming the credit landscape to prioritize transparency and user-friendliness, empowering consumers to make purchases now and pay later with no hidden fees or accumulating interest.We are on the hunt for a talented Software Engineer II to become a vital member of our AI Agents engineering team within the Servicing Engineering organization. This team collaborates closely with an omnichannel AI agent vendor to deliver a conversational first point of contact for our customers. Our focus lies in orchestrating Affirm's systems to continuously innovate and find solutions for our customers. As we navigate uncharted territories, we seek a proactive individual who is ready to take ownership and deliver results.Key Responsibilities· Collaborate with your team’s tech lead and manager to decompose larger projects into manageable tasks, delivering them in phases while ensuring timely completion.· Partner with product management, design, and analytics throughout the product development lifecycle, engaging in ideation, articulating technical constraints, and making informed decisions that weigh risks and trade-offs.· Ensure the operations and availability of your team's deliverables by establishing metrics, escalating issues when necessary, and supporting ongoing maintenance and on-call duties.· Foster a sense of community within your team by engaging in growth and development initiatives, including participating in the interview process.

Cresta is dedicated to transforming every customer interaction into a strategic advantage by harnessing the full potential of contact centers. Our innovative platform merges cutting-edge AI with human expertise to provide contact centers with invaluable customer insights, optimize processes, automate conversations, and empower team members to excel in their roles. Founded by the visionary Sebastian Thrun, renowned for his work with Google X and Waymo, and supported by an exceptional leadership team including CEO Ping Wu and co-founder Tim Shi, we are on the forefront of AI advancements.Join us on this exciting journey to redefine the future of work through AI at Cresta.About the Role:The AI Agent team at Cresta is developing enterprise-grade AI Agents designed to function effectively within real-world contact center settings. A vital aspect of this mission is to ensure that our AI Agents can integrate seamlessly with various CCaaS platforms (Contact Center as a Service), facilitating smooth transitions between AI and human agents as required.This role focuses on building robust backend systems that empower our AI Agents to:Integrate extensively with leading CCaaS platformsEngage in live customer conversations across voice and chatMaintain a complete conversation state and contextExecute real-time actions within the CCaaS ecosystemEffortlessly transition conversations to human agents without losing context, history, or workflow stateAssist human agents with AI support post-transferWe seek talented backend engineers eager to work at the intersection of distributed systems, real-time communication, enterprise integrations, and AI orchestration.This is not merely a research position; it is focused on constructing production-grade infrastructure that ensures AI Agents operate reliably within mission-critical customer environments.Why This Role Is Unique:AI + Real-Time Systems: Contribute to infrastructure that enables AI Agents to participate in live conversations on a large scale.Enterprise-Grade Integrations: Design robust connections with major CCaaS platforms and customer systems.

Cresta is dedicated to transforming customer interactions into strategic advantages by harnessing the full capabilities of contact centers. Our innovative platform merges advanced AI technologies with human insights, enabling contact centers to unearth valuable customer data, optimize communication processes, and enhance team efficiency. Founded by Sebastian Thrun, a pioneer from the Stanford AI lab and the visionary behind Google X and Waymo, our leadership team also includes Ping Wu, CEO and co-founder of Google Contact Center AI, and Tim Shi, an early member of Open AI.Join us on this exciting journey to redefine the future of work with AI. The next era of productivity starts at Cresta.About the Role:Our AI Agent team is focused on developing enterprise-grade AI Agents tailored for real-world contact center operations. A vital aspect of this endeavor is ensuring our AI Agents can seamlessly integrate with various CCaaS platforms across both voice and digital channels, facilitating smooth transitions between AI and human representatives as necessary.Your role will involve building robust backend systems that empower our AI Agents to:Integrate effectively with leading CCaaS platformsEngage in live customer conversations via voice and chatMaintain comprehensive conversation context and stateExecute real-time actions within the CCaaS ecosystemFacilitate seamless handovers to human agents, retaining context and workflowSupport human agents with AI-driven assistance post-transferWe are searching for talented backend engineers eager to explore the convergence of distributed systems, real-time communications, enterprise integrations, and AI orchestration.As a Staff Backend Engineer, you will steer the architecture and technical strategy of Cresta’s AI Agent integration platform, defining the connectivity and scalability of our AI Agents within complex enterprise environments.

About MagicalMagical is an innovative automation platform that integrates cutting-edge AI technology into the healthcare sector, providing AI agents capable of functioning effectively in real-world settings.Our mission is to create 'AI employees' that streamline tedious and time-consuming processes, specifically in healthcare—a massive $4 trillion industry laden with administrative burdens. We focus on automating critical tasks such as claims processing, prior authorizations, and eligibility checks, allowing healthcare professionals to dedicate more time to patient care.Our AchievementsAs pioneers in the transition to agentic automation in healthcare, we have achieved significant traction:Dramatic revenue growth with clients expanding into new workflows ahead of contract renewals.Rapid proof-of-concepts completed in just 7 days, delivering tangible value in an industry where similar timelines typically span months.Self-repairing automations with production-level reliability at scale, outperforming competitors who struggle to launch functional solutions.Unlike many AI firms that make grand promises, we provide dependable solutions that yield measurable outcomes. Our backing includes notable investors such as Greylock, Coatue, and Lightspeed, with a total funding of $41M. Our founder, Harpaul Sambhi, is a seasoned entrepreneur who previously sold his first company to LinkedIn.Role OverviewIn your role as a Senior Backend Engineer on the Agent Platform team, you will develop the core systems that drive our AI agents—covering aspects from orchestration and state management to model integration and evaluation pipelines. This position is centered around platform engineering, focusing on building the infrastructure that empowers our team to deliver reliable, production-grade agentic automation.You will work at the forefront of multi-agent systems, designing collaborative strategies for agents to tackle complex healthcare workflows. You will take ownership of essential backend services, overseeing them from architecture to deployment while developing verification systems that ensure our agents perform accurately every time.This hybrid position requires you to be onsite in our Toronto office two days each week.

Klue helps businesses transform scattered competitive data into clear, actionable insights. The Vancouver team is expanding and seeking a Senior Software Engineer with a focus on AI agent development. Role overview This position centers on designing and operating large language model (LLM)-powered agents at scale. Responsibilities span multi-agent orchestration, sub-agent design, and building evaluation frameworks to ensure outputs are both reliable and measurable. The work covers the full stack, including optimizing inference costs, improving retrieval and query performance, and creating feedback loops for ongoing system improvement. In addition to technical execution, this engineer will help shape the product roadmap by offering technical guidance and collaborating closely with product leadership. The role involves guiding projects from early architecture through experimentation and into production, always with an eye on production readiness and measurable results. What you will do Develop and deploy backend systems for agentic workflows. Design retrieval pipelines, orchestration layers, and agent architectures that process large volumes of competitive data, such as news, press releases, website updates, Slack messages, emails, reviews, and CRM data, into actionable intelligence for clients. Enhance LLM-powered workflows end-to-end. Work on prompt design, retrieval strategies, caching, and latency optimization to make agent responses fast, accurate, and reliable in production. Lead evaluations of agent systems at scale. Build and manage evaluation frameworks (automated, offline, and human-in-the-loop) to assess relevance, quality, latency, and overall task success. Define excellence metrics and set up infrastructure for ongoing measurement. Design and implement human-in-the-loop systems. Collaborate with product and design teams to propose and prototype feedback mechanisms, review workflows, and correction loops that help keep AI agents accurate and trustworthy over time. Location This role is based in Vancouver, British Columbia. Learn more about Klue at klue.com.

About the RoleWe are seeking two highly skilled backend engineers to become integral members of our dynamic team in Montreal and Berlin. In this role, you will be instrumental in enhancing our technological capabilities by significantly improving our core backend functionalities, thereby enabling other teams to efficiently utilize this backend.If you are enthusiastic about creating exceptional products, thrive in a fast-paced environment, and are eager to contribute to the growth of an ambitious startup, then this opportunity is tailor-made for you.Our Technology Stack:Python / FastAPIPostgreSQL / MongoDB / ElasticCloud LLM providers + bare metal GPUsGoogle Cloud Platform (GCP)Joining us as an early team member means assuming significant responsibilities from the outset, with the chance to influence our foundational technological stack and infrastructure.As part of one of the most forward-thinking AI companies today, you will collaborate with a talented team of colleagues who are leaders in their respective domains, creating an incredibly stimulating work environment. Your ResponsibilitiesOwn the delivery of complex projects, collaborating with cross-functional teams to ensure the timely completion of mission-critical components.Gain a comprehensive understanding of Reliant's overarching vision and incorporate this into your architectural and process decisions.Provide insightful feedback to refine UI/UX concepts and assist in planning backend and infrastructure enhancements.Take proactive steps to maintain long-term code quality and architectural integrity. QualificationsWe are looking for a candidate with a proven track record in backend or full-stack development, with a focus on rapid innovation and effective systems design to facilitate scalability for both opportunities and team growth.You will excel in this position if you possess the following skills and experiences:5+ years of demonstrable experience in building backend services or distributed systems.Experience in designing, building, testing, and maintaining backend services and APIs that support product features, including the ability to write robust, production-quality code.Engage in system and service design; contribute to architectural discussions and make informed decisions regarding scalability, latency, cost, and reliability.Ability to navigate ambiguity and translate high-level requirements into actionable implementation plans.Collaborate with cross-functional partners including product management, frontend, UX, data, and operations to define requirements, plan implementations, and deliver features.Ensure code quality through writing, reviewing, and enhancing unit/integration tests.

Cresta is dedicated to transforming customer conversations into a competitive edge by harnessing the full potential of the contact center. Our innovative platform merges cutting-edge AI with human intelligence, enabling contact centers to uncover valuable customer insights, optimize communication processes, and empower team members to work with greater efficiency. Founded by Sebastian Thrun, a pioneer from the esteemed Stanford AI lab and the visionary behind Google X, Waymo, and Udacity, Cresta's leadership team also includes CEO Ping Wu, co-founder of Google Contact Center AI and Vertex AI platform, and Tim Shi, an early member of OpenAI.Join us on this exciting journey to reshape the workforce using the power of AI. The future of work is here, and it starts at Cresta.

Join our dynamic team at Pigment as a Senior Backend Software Engineer. In this role, you will be instrumental in designing and implementing robust backend solutions that empower our innovative platform. You will collaborate with cross-functional teams to enhance system performance and scalability while ensuring a seamless user experience.

Join Centari as a Senior Backend Software Engineer!At Centari, we revolutionize high-stakes dealmaking by unlocking the power of private deal data. Our innovative deal intelligence platform is paving the way for a new era in law and finance, transcending mere automation to embrace data-driven decision-making. Our proprietary Deal Reasoning Engine converts complex documents into actionable insights, equipping global deal teams with the knowledge needed to negotiate effectively.We foster a diverse team of attorneys, financial experts, and engineers within a hybrid, cross-cultural environment. Our mission is supported by esteemed enterprise AI investors, including GTMfund and industry veterans such as Jeremy Kranz and Andy Appelbaum.We thrive on complexity as it breeds innovation. If you're a proactive builder who excels in ambiguous situations and embraces radical ownership, we want to connect with you!For more details, visit centari.com or follow us on LinkedIn.

About UsCommon Room is the leading AI Go-To-Market (GTM) Platform that equips your teams with intelligent AI agents powered by comprehensive buyer insights. We consolidate every signal throughout the buyer journey into a continuously-updated, person-level perspective. This empowers your team to identify the right targets, craft personalized messages, and time their outreach effectively.In a world where GTM teams are overwhelmed by tool sprawl, fragmented data, and ineffective AI, Common Room simplifies the landscape with a unified platform designed for scalability and complexity. Our solution integrates data, orchestration, and execution into a single system, perfectly suited for organizations of 75 to over 1000 employees.Having secured over $50 million in funding from prestigious investors like Greylock, Index, and Madrona, we are also supported by more than 25 industry operators from leading companies such as Figma, Stripe, Airtable, Slack, Notion, Loom, and others.Your Impact at Common RoomWe seek individuals who are quick learners and possess a strong grasp of our product, business, and technology. You will thrive on growth and independence while owning and executing significant features. Your expertise in building APIs will help fellow engineers address customer challenges effectively, all while ensuring our systems remain efficient, scalable, and reliable. You will play a key role in advancing Common Room’s core internal capabilities, infrastructure, and systems, often staying a step ahead to meet customer needs.Additionally, you will engage in vital company-building initiatives that are essential for our fast-growing startup.Ideal Team Member6+ years of experience in software engineering.You are self-sufficient yet value collaboration and support from colleagues.Passionate about your craft and eager to manage substantial backend projects.Ability to work effectively with a diverse team of experienced engineers, including front-end developers.Sound judgment regarding trade-offs and tools necessary for problem-solving, preferring stable, well-supported technologies over trendy options.Design systems that address customer issues and find satisfaction in creating simple, elegant solutions.

Join Databricks, an innovative leader in data and AI, on our mission to simplify access to data and AI technologies. We are dedicated to transforming industries, from revolutionizing transportation to advancing medical breakthroughs, by providing the world's foremost data and AI infrastructure platform. Our engineering-driven culture fuels our relentless pursuit of solving technical challenges, whether it's enhancing the user experience with next-gen UI/UX or expanding our infrastructure to support millions of virtual machines.As we establish our new R&D center in Vancouver, we are on the lookout for exceptional engineers to help us democratize data and AI. This site is poised to become a cornerstone of product innovation at Databricks, with several strategic initiatives underway.The Vancouver team will focus on key areas, including:Log Analytics - Tackling the challenges of real-time petabyte-scale log analysis, encompassing the entire data processing pipeline from ingestion to user experience.AI/BI - Our AI/BI product is revolutionizing business intelligence with unmatched adoption rates, enabling rich dashboarding and advanced visualizations.Unity Catalog Business Semantics - Governing and managing enterprise data context through our innovative Unity Catalog, enhancing data modeling and AI enablement.Databricks Apps - Contributing to one of our fastest-growing products, with opportunities to work on low-level platform components and AI-driven app builder agents.

Join Us at HarveyAt Harvey, we are revolutionizing the landscape of legal and professional services. Our approach is not merely incremental; we are committed to a comprehensive transformation. By leveraging cutting-edge AI technologies, a robust enterprise platform, and profound expertise in the domain, we are redefining how critical knowledge work is executed for generations to come.This is an exceptional opportunity to contribute to a generational company at a pivotal moment in its growth. With over 1,000 clients across 58 countries, a strong product-market fit, and support from world-class investors, we are experiencing rapid growth and creating a new category in real-time. The challenges are ambitious, the standards are high, and the potential for personal, professional, and financial growth is unparalleled.Our team consists of sharp, motivated individuals who are deeply dedicated to our mission. We operate with urgency, take ownership of our challenges, and are committed to delivering impactful solutions — from initial concepts to long-term results. We maintain close relationships with our customers, from leadership to engineers, collaborating to address real problems with urgency and care. If you thrive in dynamic environments, strive for excellence, and wish to influence the future of work alongside high-achieving peers, we invite you to build with us.At Harvey, we are scripting the future of professional services today, and we are only just beginning.Role SummaryAs a Backend Software Engineer at Harvey, you will be instrumental in building the foundational infrastructure of our product platform, while also developing user-facing features for some of the world's leading law firms and enterprise clients. This team is responsible for the platform layer that ensures secure, reliable, and adaptable experiences for our customers, including notifications, permissions, and feature flag infrastructure. Additionally, we create enterprise-grade collaboration tools tailored for law firms.You will design systems that serve as critical infrastructure for the wider company, directly influencing how our users engage with Harvey's AI-driven legal tools. This position is perfect for engineers eager to oscillate between in-depth platform architecture and hands-on product development.This position is based in Toronto, Canada. We operate on a hybrid model, with a requirement of 3+ days in the office per week, and we offer relocation assistance to new hires.

Join Flagler Health, an innovative healthtech company dedicated to revolutionizing healthcare delivery through cutting-edge AI-driven workflow automation, enhanced remote patient engagement, and comprehensive chronic care programs. Our platform, already trusted by more than 1.5 million patients, is reshaping the efficiency and cost-effectiveness of care in the $4.5 trillion U.S. healthcare market, and with our unique freemium model, we're set to expand significantly.Key ResponsibilitiesArchitect, develop, and sustain robust backend services and web applications.Engage in the development of real-time web applications for audio and SMS communications with patients.Create and manage fault-tolerant, scalable workflows for asynchronous background processing.Collaborate effectively with frontend, product management, and infrastructure teams to ensure the delivery of reliable, compliant systems.Required QualificationsDemonstrated experience in building high-availability backend applications within regulated sectors (e.g., healthcare, finance).Strong proficiency in TypeScript and/or Python for backend service development.Experience with backend APIs utilizing Node.js, Express, Mongoose, Twilio or similar technologies.Familiarity with distributed workflow orchestration systems such as Temporal, Cadence, AWS Step Functions, or Conductor.Solid grasp of distributed systems principles, including retries, idempotency, and robust failure handling.Preferred QualificationsExperience within the healthcare technology or SaaS sectors at a mid-sized startup.Understanding of HL7, FHIR, or EHR integration processes.Familiarity with cloud services such as AWS, Azure, or GCP.Hands-on experience with CI/CD pipelines, infrastructure automation, and version control systems (e.g., Git).Experience in a monorepo environment (e.g., Turborepo, Nx).

Senior Backend Software EngineerProcurify is an innovative AI-driven platform specializing in procurement and accounts payable automation tailored for mid-market organizations. Our mission is to empower businesses to take charge of their spending and achieve significant savings.We are seeking a pragmatic and insightful engineering leader to drive the scalability of our platform, refine our development practices, and cultivate a high-performing team.Role OverviewAs a Senior Backend Software Engineer, you will play a pivotal role in shaping the product vision and technical framework of the core engine that supports the Procurify platform. Collaborating closely with our leadership team and skilled engineers, you will tackle complex technical challenges and deliver high-quality code.Your responsibilities will encompass leading major technical initiatives that have a substantial impact on performance, reliability, and scalability of our server-side systems. Building strong relationships across engineering teams, mentoring junior technical leaders, and contributing to broader strategic goals will be key aspects of this role. We are on the lookout for entrepreneurial individuals who are eager to challenge conventional norms and make meaningful contributions.Key Responsibilities:Lead Technical Strategy & Architecture: Drive architectural decisions that align with product strategies and provide critical technical insights to the leadership team. Collaborate with your team on technical designs to ensure they adhere to best practices while enhancing our backend implementations.Design & Ship Scalable APIs and Services: Utilize your expertise to develop and maintain RESTful APIs and backend services using Python and Django, ensuring high standards of quality and maintainability.Mentor & Elevate the Team: Guide technical leaders at Procurify, actively engaging in code reviews and architectural discussions, while providing constructive feedback to elevate the overall team performance.Design & Optimize Data Systems: Contribute to the design and optimization of our database systems, ensuring they meet performance and reliability standards.

Join the Revolution at HarveyAt Harvey, we are redefining the landscape of legal and professional services with a bold vision that encompasses an entire ecosystem. By leveraging cutting-edge agentic AI, an enterprise-level platform, and unparalleled domain expertise, we are transforming how essential knowledge work is executed for generations to come.This is an extraordinary opportunity to contribute to a groundbreaking company at a pivotal stage in its journey. With over 1,000 customers spread across more than 58 countries, a strong product-market fit, and exceptional investor backing, we are on an accelerated growth trajectory and are creating a new category in real time. The challenges are ambitious, standards are high, and the potential for personal, professional, and financial growth is unparalleled.Our team is comprised of talented, driven individuals who are deeply committed to our mission. We operate with a sense of urgency and ownership, tackling problems from ideation to execution. We maintain close relationships with our customers, collaborating across all levels to address significant challenges with care and speed. If you thrive in dynamic environments, strive for excellence, and wish to influence the future of work alongside a team that continuously raises the bar, we welcome you to join us in building something remarkable.At Harvey, we’re not just envisioning the future of professional services; we are actively crafting it today.Role OverviewAs a Senior Backend Software Engineer at Harvey, you will be instrumental in laying the groundwork for our product platform while developing user-facing features for some of the world's leading law firms and enterprise clients. Your team will manage the platform layer that ensures secure, reliable, and adaptable experiences, including notifications, permissions, and feature flag infrastructure. You will also create enterprise-grade collaboration tools tailored for law firms.Your responsibilities will include designing and managing systems that serve as the backbone of our operations and significantly influence how users engage with Harvey’s AI-enhanced legal solutions. This role is perfect for engineers who are eager to oscillate between extensive platform architecture and hands-on product development.This position is based in Toronto, Canada, and we operate under an in-person work model, offering relocation assistance to new team members.What You’ll DoDesign and develop robust backend infrastructure, including authentication systems, user permissions, feature flagging, notifications, and document management integrations.Enhance and evolve Harvey’s internal product platform, facilitating development across various product lines and engineering teams.Collaborate with cross-functional teams to identify and address user needs, ensuring a seamless experience.Implement best practices in software development and contribute to a culture of continuous improvement within the engineering team.

Senior Backend Software EngineerABOUT USProcurify is a leading AI-driven procurement and accounts payable automation platform designed specifically for mid-market organizations. Our mission is to empower businesses to take control of their spending and achieve significant savings.We are seeking a strategic and insightful engineering leader to join our team and assist in the scaling of our platform, development methodologies, and engineering talent.ABOUT THE ROLEAs a Senior Backend Engineer, you will play a pivotal role on our foundational Platform team. This team is responsible for the essential services, APIs, and integration frameworks that connect Procurify with our clients' vital financial and HR systems.In this hands-on role, you will excel in developing robust and scalable integrations. You will lead the design and implementation of connections to key Accounting and ERP platforms, facilitating seamless data exchange and enabling powerful automated workflows for our clients. Your enthusiasm for API design, problem-solving in complex integration scenarios, and mentoring fellow engineers will be crucial in enhancing the team's capabilities.WHAT YOU’LL BE WORKING ON:Design & Build Core APIs: Take the lead in designing, developing, and maintaining our internal and external APIs, contributing significantly to our API-first strategy by utilizing modern Python frameworks like FastAPI.Build & Maintain Key Integrations: Serve as the go-to expert for our suite of third-party integrations, ensuring reliable connections to critical Accounting/ERP systems (e.g., QuickBooks Online, NetSuite, Microsoft Business Central).Enhance our Platform Architecture: Contribute to the long-term vision of our integration platform, designing and implementing scalable, observable, and resilient systems capable of managing high data volumes from numerous customers.Mentor & Grow Teammates: As a senior engineer, you'll provide technical mentorship to other team members, leading by example during code reviews and sharing your knowledge in technical design discussions.OUR TECH STACK:Backend: Python, Django, FastAPICloud: AWS

Join Sierra as a Software Engineer, Agent, where you will play a pivotal role in revolutionizing our software solutions. We are looking for innovative thinkers who are passionate about technology and eager to make a significant impact. Your expertise will contribute to developing cutting-edge applications that enhance user experiences and drive efficiency.