Senior Software Engineer - Python

We are seeking a highly skilled Senior Software Engineer to join our innovative team at Kunai. In this role, you will be responsible for designing, developing, and maintaining high-quality software solutions that meet the needs of our clients. You will collaborate closely with cross-functional teams to deliver impactful projects and ensure continuous improvement in our software development processes.

Role overview The Senior Software Engineer at the City of New York will work on software that helps city departments deliver better services. The focus is on building and refining technology that supports municipal operations, aiming to make them more efficient and responsive. What you will do Design and develop software to support and enhance services provided by the city Work closely with colleagues who are committed to improving public service Use technical skills to address challenges faced by city operations Location This position is located in New York, NY.

About the Role Toku is hiring a Senior Software Engineer in New York. This position focuses on designing and building new software solutions that support the company’s technology goals. The team values collaboration and relies on skilled engineers to help drive projects forward. What You Will Do Lead the design and implementation of software projects Work closely with other engineers and teams to deliver reliable solutions Apply the latest technologies to solve real-world problems Who We’re Looking For Experience leading software development projects Strong technical skills and a track record of building effective solutions Interest in working with new tools and collaborating with others Location This role is based in New York.

Are you ready to transform the advertising landscape? At Cognitiv, we are more than just another AdTech firm—we're pioneers reshaping media buying through our innovative Deep Learning Advertising Platform. Since 2015, we've leveraged the power of advanced deep learning technologies and data science to redefine how brands engage with their customers. Our goal? To infuse intelligence into advertising, delivering unmatched precision, relevance, and impact on a large scale. With our cutting-edge platform, advertisers gain unparalleled flexibility—whether activating Dynamic Deals via their preferred DSP, utilizing our managed service DSP, or tapping into our industry-first ContextGPT product. As a member of Cognitiv, you'll be at the forefront of AI-driven advertising solutions, spearheading change and achieving remarkable growth in a fast-paced industry. We are expanding our team!The Role As a Senior Software Engineer, you will be an integral part of our Reporting & Insights team. In this capacity, you will develop systems to measure performance across Cognitiv’s diverse portfolio, transforming large, intricate datasets—from AI-driven campaign results to attribution signals and real-time performance metrics—into reliable, actionable insights for internal teams and external clients.You will be responsible for the design, delivery, and reliability of the core subsystems that power our platform, identifying unknowns, and making essential trade-offs to enhance system performance and engineering effectiveness.Additionally, you will elevate the technical capabilities of a strong mid-level team through hands-on mentorship, thoughtful design leadership, and a commitment to high engineering standards. We seek someone who embodies ownership, curiosity, and trust, whose influence will enhance not only the systems we develop but also the way our team collaborates.Your Impact Success in this position will be reflected in the tangible health and growth of our platform. You will:Lead Technical Design: Own the architecture of systems that are central to how Cognitiv's clients and internal teams evaluate performance. Your design choices will significantly influence the platform's scalability and reliability.Elevate Reliability: Identify bottlenecks and enhance system observability (metrics, logging, monitoring). You will lead blameless post-mortems and implement long-term solutions to prevent future incidents.

Join The New York Times as a Software Engineer in our Scoop Core team, where you will collaborate with talented developers to design and implement innovative solutions that enhance our digital platforms. You will play a critical role in shaping the future of journalism through technology, ensuring our content reaches millions of readers effectively and efficiently.

About ValonValon is pioneering an AI-native operating system designed specifically for the regulated finance sector, beginning with mortgage servicing. As a Series C startup supported by a16z, we are dedicated to revolutionizing industries that have long been considered too intricate for innovation.Rather than relying on outdated legacy systems, we have chosen a different path: we've developed and are running our own mortgage servicing business, overseeing over $110 billion in loans. This has provided us with invaluable insights into the complexities required to create effective software for regulated industries.The results are impressive. We have redefined mortgage servicing from a 0% margin business to achieving margins exceeding 60%, all while significantly enhancing customer satisfaction. Major enterprise contracts are being implemented across the sector.ValonOS, our integrated platform, allows for structured and programmable processes, positioning us perfectly for the AI revolution. By centralizing operations through a single system enriched with data, our AI agents not only automate tasks but also continuously enhance overall operations. Mortgage servicing is just the first step in our mission to transform regulated industries and beyond.Engineering at ValonThe engineering team at Valon is committed to powering the software ecosystem to disrupt one of the most antiquated and heavily regulated areas in the financial industry: mortgage servicing. We have established the foundation of a state-of-the-art mortgage servicing platform capable of efficiently managing billions of dollars at scale, but this is merely the beginning. At Valon, we aim for you to do the best work of your life, surrounded by a close-knit community of exceptional professionals from renowned companies like Stripe, Jane Street, Meta, and Google, who are deeply passionate about their work and one another.While the challenges we face are complex, we provide ample autonomy for you to learn quickly, act decisively, and make a substantial business impact. Our technology stack includes Python, React, Docker, Kubernetes, and Google Cloud Platform.We are headquartered in New York City and are thrilled to be opening a new office in San Francisco this year. Additionally, we fully support remote work!

Lyft seeks a Senior Software Engineer to improve the rider experience on its platform. This position focuses on developing and enhancing scalable features that help create a smoother, more enjoyable journey for every user. Role overview As part of the team, you will work on projects that directly impact how riders interact with Lyft. The work involves shaping and refining the platform to support reliable, user-friendly rides. Location This role is based in New York, NY.

CurbWaste is an innovative vertical SaaS company dedicated to revolutionizing the Waste Management sector, which has been historically overlooked by contemporary technology. Our mission is to empower the hardworking operators who form the backbone of essential infrastructure by providing them with sophisticated tools that enhance their operational clarity and efficiency.We strive for excellence at CurbWaste, fostering a culture of growth, trust, and ownership among our team members. We are committed to delivering substantial value to our customers while continuously pushing our own boundaries.About the RoleWe are in search of a Senior Software Engineer who is passionate about making a tangible impact through their code. This position offers the opportunity not just to implement features but to help shape our product vision, establish our technical framework, and significantly enhance the experiences of customers in a traditionally neglected industry.You will collaborate closely with our Head of Engineering, product leaders, and founders to bring our ambitious roadmap to fruition, exploring the possibilities of technology in waste management. Your contributions will be vital in architecting scalable and maintainable systems, making foundational decisions that will influence our platform for years to come.The ideal candidate is a skilled, opinionated developer who produces clean, reliable code, prioritizes product quality, and enjoys tackling complex, end-to-end challenges. This role is high-impact, allowing you the autonomy to lead initiatives, move swiftly, and create solutions that matter within a committed team.What You Will DoTake ownership of and successfully deliver challenging engineering projects — from modernizing legacy systems to architecting and building intricate new features from scratch.Contribute to architectural decisions that ensure the application remains scalable, maintainable, and resilient as our company evolves.Work collaboratively with engineers, product managers, QA, Customer Success, and leadership to synchronize technical execution with customer and business objectives.Operate with autonomy, bringing your innovative ideas to enhance performance, developer experience, and product usability.Produce clean, well-tested, and efficient code while advocating for software quality and best practices across the team.Help cultivate and enhance our engineering culture through mentorship, code reviews, and promoting ongoing learning and technical excellence.Engage in agile development cycles with an emphasis on rapid shipping, quick learning, and iterative improvement.Have the potential to assume technical leadership responsibilities and possibly lead a dedicated product team as we grow.

About UsDriveWealth is revolutionizing the investment landscape by making it accessible to everyone. We are committed to empowering individuals in their financial journeys, ensuring that barriers such as wealth, geography, or outdated systems do not hinder access to financial markets. As a leading global B2B fintech company, we focus on democratizing financial independence through our innovative API-based platform, which allows partners to deliver seamless investing and trading experiences via mobile devices. Our technology encompasses a modern toolkit, facilitating both traditional investment processes and cutting-edge features like fractional share ownership. DriveWealth has become a comprehensive platform for trading U.S. equities, mutual funds, ETFs, fixed income, and options.Join us at this exciting juncture as we build a groundbreaking business, blending the pace and innovation of a fintech startup with the stability and rigor of Wall Street. We foster a culture of creativity and experimentation, all while ensuring compliance and excellence in execution. Be part of shaping the future of global investing!About the RoleWe are on the lookout for a Senior Software Engineer to become an integral part of our Brokerage Platform as a Service and API teams. In this position, you will design and develop high-performance, scalable, and low-latency applications utilizing Java, Kafka, Postgres on AWS. You will play a crucial role in building event-driven microservices that facilitate real-time data processing and manage high-throughput transactions. Additionally, you will optimize database performance, employing strategies such as partitioning to support our dynamic transaction environment.As a Senior Software Engineer, your collaboration with fellow engineers will ensure that systems are crafted for reliability, scalability, and performance, while consistently delivering high-quality software in a fast-paced, cloud-native setting.

CLEAR is pioneering the future of secure identity management. Our mission is to enhance safety and simplify experiences, both physically and digitally. With over 38 million members and an expanding network of partners globally, CLEAR's secure identity platform is revolutionizing everyday interactions—be it at airports, stadiums, or throughout daily life, CLEAR facilitates seamless experiences. As a recognized leader in digital and biometric identification, CLEAR minimizes friction for our members whenever an ID check is required. We are seeking a seasoned Senior Software Engineer to contribute to the development of next-generation products that will extend beyond mere identification, empowering our members to harness the strength of a connected digital identity. In this role, you will engage in designing, implementing, testing, and deploying applications that enhance our platform, which interlinks numerous attributes and qualifications while prioritizing member privacy and security.

Join Nexxen as a Senior Software Engineer! At Nexxen, we are revolutionizing the advertising landscape with our innovative, data-driven solutions. We empower advertisers, agencies, publishers, and broadcasters globally to leverage data and advanced TV technology to achieve their objectives. Our state-of-the-art technology stack incorporates a demand-side platform (DSP) and a supply-side platform (SSP), centered around the Nexxen Data Platform.Why Be Part of Nexxen? Be a key player in a dynamic team that is reshaping advertising through creativity and collaboration. Our employees embody the Nexxen Way, built on the 3Cs: Customer Centricity, a Curious Mindset, and Collaboration without Ego. We value dedication and innovation!Your Safety Matters We prioritize the well-being of our team members and are committed to ensuring a safe hiring process. Be cautious of online scams and fraudulent job postings. Nexxen will never ask for payment as part of the hiring process. If you encounter any suspicious job postings or communications, please contact us at infosec@nexxen.com to verify their authenticity. Stay informed and safe!We are looking for a Senior Software Engineer to architect and develop the core components of our DSP, enabling real-time programmatic advertising. This role emphasizes building high-throughput, low-latency distributed systems designed to handle billions of bid requests daily while ensuring optimal bidding decisions within stringent latency requirements. You will have the opportunity to explore cutting-edge technologies tailored for Programmatic Ad serving and Ad Tech solutions. Your contributions will be vital in enhancing our bidding infrastructure, targeting systems, and integrations with supply partners to optimize ad delivery and boost campaign performance.Key Responsibilities:• Design and implement high-performance distributed systems capable of managing extensive bid request traffic, maintaining sub-100ms latency standards.• Develop and refine real-time bidding (RTB) services that assess targeting criteria, ensuring efficiency and effectiveness in ad placements.

WireScreen is an innovative Series A startup dedicated to simplifying the intricate landscape of global business. Our mission is to create a premier intelligence platform that enables users to navigate complex supply chains and mitigate risks associated with China, uncovering the vital connections, relationships, and financial networks that underpin companies. This empowers our clients to identify opportunities, eliminate barriers, and make informed decisions.Supported by leading investors such as Sequoia Capital and Harpoon Ventures, our talented team includes a Pulitzer Prize-winning journalist and seasoned engineers from top tech firms like Google, Twitter, and Oracle. In just three years since our inception, we have gained significant traction with prestigious government clients, and we are poised for further growth. If you are passionate about enhancing global systems' transparency and security, now is the ideal time to join our team.Explore our CEO's blog detailing how WireScreen traced the origins of DeepSeek back to 2023, well before it gained mainstream attention in 2025.

Role overview Collibra Inc. is hiring a Senior Software Engineer based in New York, NY. This position centers on building and delivering new features and projects that improve how users interact with Collibra’s products. The work directly supports both client needs and the company’s goals. Key responsibilities Design and implement new product features to enhance Collibra’s offerings Partner with product managers and stakeholders to set priorities and deliver updates Uphold strong standards for code quality, security, and performance Produce clear documentation to help engineering teams collaborate and scale Collaboration This role involves regular teamwork with cross-functional groups. Senior Software Engineers, product managers, and other stakeholders coordinate efforts to keep projects on track and aligned with user needs.

About Datadog: At Datadog, we are dedicated to creating the most robust platform for engineers to comprehend and scale their systems, applications, and teams. Our operations are characterized by high scalability—handling trillions of data points daily—and we provide reliable alerting, metrics visualization, logging, and application tracing for tens of thousands of companies. Our engineering culture is rooted in values of pragmatism, honesty, and simplicity, allowing us to tackle complex problems effectively. The Opportunity: As a Senior Staff Engineer at Datadog, you will take on a pivotal role as a technical leader, driving the design and implementation of large-scale systems that will underpin our growth for the next five years and beyond. Your impact will manifest in three key areas: Individual Contributor: Leverage your exceptional technical expertise to develop industry-leading systems in domains such as observability data platforms, distributed query engines, and real-time event streaming at a global scale. Technical Leadership: Utilize your broad architectural perspective and profound systems thinking to align design decisions across various teams and domains, navigating complex, multi-team challenges to define long-term technical strategies and propel large-scale initiatives forward. Engineering Stewardship: Play a crucial role in the evolution of our systems and engineering culture by actively engaging with Datadog’s senior technical community, incorporating external insights and internal experiences to elevate our engineering practices.

Join Kepler: AI You Can Trust and Verify.At Kepler, we understand the critical flaws that plague AI tools, where data manipulation leads to unreliable outputs. In a world where million-dollar decisions depend on precise data, we have created a groundbreaking architecture that renders these flaws obsolete. Our system ensures that AI interprets your intent while deterministic code retrieves accurate figures from source documents, guaranteeing that every output is traceable and defensible.With over 950K SEC filings, 14K+ companies, and 40M+ documents across 27 global markets, we are trusted by firms that cannot afford errors.Our architecture is versatile and domain-independent. While we are initially focused on finance, industries such as healthcare, legal, and insurance will soon benefit from our innovative verification layer for the entire AI ecosystem.Founded by industry veterans Vinoo Ganesh and Dr. John McRaven, and supported by pioneers from OpenAI and Facebook AI Research, we are at the forefront of transforming AI reliability.The RoleAs a Senior Software Engineer, you will play a critical role in architecting and building the core systems that drive Kepler's AI research platform. You will take ownership of essential infrastructure, including backend services that orchestrate AI workflows and data pipelines that manage billions of data points, impacting how financial professionals make pivotal decisions.This position is designed for engineers eager to create foundational technology at the intersection of AI and finance, where your technical leadership will have a direct influence on client decision-making.In your first 90 days, you will:Lead and deliver a major production system from conception to deploymentDrive architectural decisions that influence the platform’s future directionWitness your code powering research at leading financial institutionsGuide and mentor engineers while establishing engineering best practices

Join Tagup, a pioneering Series A defense technology company founded at MIT, as we revolutionize logistics excellence through cutting-edge AI solutions. Our journey began on a balcony at MIT with a vision to monitor asset data via the cloud using passive RFID tags (TAG) transmitted UP to the cloud.Our flagship product, Manifest, serves as the operating system for the physical world. Comprising a dynamic team of engineers and data scientists, we are dedicated to leveraging reinforcement learning and probabilistic modeling to enhance military logistics and critical infrastructure performance, ensuring optimal resource utilization for our clients.In this role, your contributions will lead to tangible impacts where your code will optimize not just a shopping cart or compute primitive, but rather supply chains for the U.S. military and safeguard vital infrastructure from catastrophic failures. We prioritize modern, open standards over proprietary tools and build systems. You will have the opportunity to own entire architectural domains, from API design and data modeling to deployment and monitoring strategies. Collaborate directly with PhD-level data scientists and former special operators in a fast-paced environment that values swift decision-making over lengthy approval chains.The RoleYour expertise in operating at scale is crucial. You thrive on ownership and a proactive approach. Unlike the limitations of a large corporation or cloud provider where your focus may be restricted to a single service or proprietary tools, this position offers you the chance to architect a core platform that processes billions of data points from the physical world. This is a unique opportunity to break free from the maintenance of legacy services burdened by years of technical debt.

Become a Force for Good at Axon.At Axon, we are dedicated to the mission of Protecting Life. We are innovators, addressing society's most pressing safety and justice challenges through our comprehensive ecosystem of devices and cloud-based software. Our strength lies in collaboration; we connect with transparency and empathy, valuing diverse insights from our customers, communities, and each other.Life at Axon is dynamic, challenging, and impactful. Here, you will take initiative and drive meaningful change, continuously evolving while contributing to a cause that truly matters at a company that values your contributions.About PreparedAs of October 1, 2025, Prepared has officially partnered with Axon—a significant milestone for both our teams and the public safety sector. United by our common goal to Protect Life, Axon and Prepared are pioneering a new era of AI-enhanced emergency communications. Together, we are bridging the gap between the initial call for assistance and effective resolution on the ground—empowering responders with the clarity they need when time is of the essence.911 forms the backbone of public safety in America. Unfortunately, the professionals handling these calls have long been hindered by outdated technology. Prepared aims to rectify this. Since our inception in 2021, we have leveraged advanced AI to streamline millions of emergency calls across 49 states—serving over 90 million individuals and redefining capabilities in crisis response.Joining Prepared means becoming part of a team that is actively shaping the future of emergency services, creating a safer and more interconnected world.Position OverviewWe are seeking backend-focused software engineers who share our passion for our mission, at various experience levels. This is your chance to join a small but rapidly growing engineering team (currently 45+ engineers) and make a significant impact while enjoying a high degree of autonomy and ownership.This is a hybrid role, requiring four days a week in our Manhattan office.In this position, you will confront complex engineering challenges in areas such as audio/video processing and generative AI, bringing new features and products from conception to scale while carefully balancing speed with the high standards of stability required by the critical nature of our products. As an early team member, you will play a pivotal role in establishing the foundation of Prepared's engineering culture.

About UsAt Findigs, we're dedicated to transforming the rental experience for everyone. Our mission is to make renting easier, fairer, and more convenient, paving the way for all individuals to find their next home with confidence.We offer a digital rental application that simplifies the application process, ensuring a secure and efficient experience for renters. Our innovative solutions empower property managers across the country to provide exceptional service while streamlining the application evaluation process.The OpportunityAs a Senior Software Engineer at Findigs, you will be instrumental in designing and delivering cutting-edge software solutions. You'll take ownership of product features, collaborating with a diverse team comprising Product, Data, Design, and Engineering professionals. Your efforts will directly contribute to enhancing the rental experience for all stakeholders.In this senior role, you will lead the development and launch of product features, while also mentoring and coaching junior engineers, fostering their growth and building a collaborative team culture.Technology Stack: Python, Django, Typescript, React, Temporal.io, Postgres, and more.Please note that we are currently unable to provide sponsorship for employment visas.

P-1473 At Databricks, we are dedicated to empowering data teams to tackle the world's most challenging issues — whether that's bringing the next mode of transportation to life or accelerating groundbreaking medical advancements. Our mission is fulfilled through the creation and operation of the world's premier Data Intelligence Platform, enabling our clients to harness deep data insights to enhance their operations. Born from an engineering background and fueled by customer-centricity, we eagerly embrace every opportunity to confront technical challenges — from designing next-generation UI/UX for data interaction to scaling our services and infrastructure across millions of virtual machines. And this is just the beginning. As one of the pioneering fullstack engineers at our NYC Engineering office, you’ll join a dynamic team committed to innovating and building new products from the ground up. Our aim is to leverage the capabilities of Databricks in data and AI to deliver vertical AI applications tailored for both technical and business users. This role embodies a true 0-to-1 environment, blending the excitement of a startup with the resources of a tech powerhouse like Databricks. Your primary challenge will involve utilizing the latest UX/UI technologies to craft intuitive yet robust interfaces for complex data and workflows. Your team is adopting a UI-first and GenAI-first strategy in product development. You may work on challenges such as: Designing interfaces for GenAI agents capable of generating intricate workflows while ensuring human oversight through transparency and inspectability. Creating sophisticated visualizations, including data pipelines, data mappings, customer journey flows, identity graphs, and more. Establishing mechanisms that promote product-led growth through effortless onboarding and sharing functionalities. Fostering an interactive environment for collaborative data projects at scale with a seamless transition to production.