Automation QA Engineer (SDET)

🏢 Summary: Role focused on manual and exploratory testing of Android and iOS SDKs within a high-scale adtech platform, ensuring quality from feature definition through release. The position involves defining test strategies, executing regression and smoke tests, validating multi-device builds, and collaborating closely with developers and automation engineers. It contributes directly to quality standards across a growing mobile SDK portfolio. 🗂️ Requirements: 2+ years in QA or mobile testing, Experience testing Android applications, Experience testing iOS applications, Proficiency with TestRail or similar test management system, Proficiency with JIRA for bug tracking, Understanding of API testing concepts, Experience in Agile/Scrum environments, Experience with network traffic analysis tools 📃 Skills: Android, iOS, TestRail, JIRA, API, Agile, Scrum, Charles, BrowserStack, Maestro, Rust, JavaScript 🏢 Description: About LoopMe LoopMe is an AI company solving one of advertising's hardest problems: making brand advertising actually measurable — and making it perform. Our platform runs patented machine learning models across billions of consumer signals in real time, optimising campaigns toward outcomes like purchase intent, brand lift, and foot traffic rather than proxy metrics like clicks. The result is 2–5x better performance than industry benchmarks, at scale. We operate a high-load programmatic infrastructure — processing millions of ad requests per second with sub-200ms response times globally. This isn't a layer on top of someone else's stack; it's built from the ground up, in-house, by the team you'd be joining. Founded in 2012 and headquartered in London, we now have 400+ people across 19 cities and have sustained 40% revenue CAGR since 2018. The engineering problems here are real, the ownership is genuine, and the scale is significant. The opportunity You'll own manual and exploratory testing across LoopMe's Android and iOS SDKs, playing a key role in quality decisions from feature definition through to release. Working closely with developers, automation engineers, and product managers, you'll define test strategies for new features and help shape how quality is approached as our SDK portfolio grows. This role sits within the Mobile SDK Quality team. What you'll do Design, write, and execute manual test plans and test cases for Android and iOS SDK releases and new feature work Own exploratory, regression, and smoke testing across nightly builds and release candidates Validate Adapter Certification builds across multiple OS versions and device configurations Log, triage, and track defects in JIRA with clear reproduction steps and supporting evidence Manage and maintain test cases in TestRail, keeping coverage current across all SDK projects Partner with the automation team to identify high-value candidates for automated test coverage Participate in sprint ceremonies and contribute to quality sign-off decisions Advocate for quality best practices and drive process improvements as the team scales What you'll bring Essential: 2+ years in a QA or mobile testing role Experience testing Android and iOS applications Proficiency with TestRail or a comparable test management system, and JIRA for bug tracking and sprint management Solid understanding of API testing concepts Experience working within Agile/Scrum teams, including use of Charles Proxy or a similar tool for network traffic analysis Nice to have: Familiarity with BrowserStack or a similar real-device cloud platform Experience with Maestro for mobile UI testing Knowledge of AI tools, including Claude Basic scripting ability in Rust or JavaScript Adtech or programmatic advertising domain knowledge What we offer Hybrid working — flexible schedule 1 month work-from-anywhere Annual performance bonus Multikafeteria (sport/culture card) LoopMe Gives Back Learning & development support

🏢 Summary: The offer is for a Java Backend Engineer to build and scale a high-load Data Management Platform processing billions of events daily in a real-time ad tech environment. The role focuses on developing and optimizing distributed data pipelines, microservices, and database schemas for performance and scalability. It involves working on complex backend systems supporting large-scale advertising auctions and audience targeting. 🗂️ Requirements: 2+ years of engineering experience, Proficiency in Java, Strong understanding of concurrency, Strong understanding of distributed systems, Experience with Spring Framework or similar IoC framework, Experience with JPA or other ORM framework, Strong knowledge of SQL, Experience with PostgreSQL or other modern RDBMS, Ability to work with large multi-module codebase 📃 Skills: Java, Spring, JPA, SQL, PostgreSQL, Spark, HBase, Kafka, Kubernetes, ORM, NoSQL 🏢 Description: We’re looking for a Java Backend Engineer to join LoopMe — a global AI-powered ad tech company redefining how brands connect with consumers across the open internet. In this role, you’ll help build and scale our Data Management Platform (DMP) — a massively distributed, high-throughput system processing billions of events daily , creating rich device and audience profiles, and exporting data segments to 50+ global partners and exchanges in real time. You’ll work on complex backend challenges around performance, scalability, data pipelines, and real-time processing , helping power the infrastructure behind large-scale advertising auctions and audience targeting. This is an opportunity to work on truly high-load systems , collaborate with experienced engineers, and have direct impact on a product used by some of the biggest players in the ad tech ecosystem. What you'll be doing: Developing features and optimizing performance for large-scale data pipelines (Spark jobs, HBase, Kafka) Designing and optimizing data schemas for relational and NoSQL databases Building microservice applications Core qualifications: 2+ years of engineering experience Proficiency in Java with a strong understanding of concurrency and distributed systems Experience with Spring Framework or similar IoC frameworks Experience with JPA or other ORM frameworks Strong knowledge of SQL and experience with modern RDBMS (PostgreSQL) Self-motivated, reliable, and comfortable working across a large multi-module codebase Additional experience we’d value: Experience with Apache Spark or other large-scale data processing frameworks Experience with HBase or other NoSQL/columnar stores Experience with Kubernetes Experience with Kafka Experience with AI/LLM integrations in backend services Benefits Flexible working schedule with a hybrid type of work Annual performance bonus One month of workation (you can work from any part of the world for one month) Multikafeteria

🏢 Summary: Backend Software Engineer role focused on building and scaling a high-traffic mobile advertising exchange that processes hundreds of thousands of real-time auction requests per second. The position involves full lifecycle development of distributed, low-latency microservices written in functional Scala and deployed to production. Engineers design, implement, test, and optimize backend systems for high availability and performance. 🗂️ Requirements: BS in Computer Science or related field, 6+ years of software engineering experience, 2+ years of Scala programming experience, Experience with Java or Python, Hands-on experience with microservices architecture, Experience building high-traffic, high-availability systems, Experience with Agile development, Ability to design, implement and test backend systems, Experience troubleshooting application and infrastructure issues, Experience writing unit tests 📃 Skills: Scala, Java, Python, Microservices, MongoDB, Bigtable, Aerospike, Kafka, PubSub, AWS, GCP, Git, Bitbucket, ProtocolBuffers, NoSQL 🏢 Description: LoopMe is the leading in-app monetization and programmatic advertising platform. We reach a mobile audience of over 900 million monthly unique users globally and process over 200 billion ad requests. The Chartboost SDK is the highest-integrated independent mobile ad SDK and through the Chartboost Exchange, Ad Network and other services, we empower mobile app developers to build businesses while connecting advertisers to highly engaged audiences. What we need: We are looking for a backend software engineer to join our exchange team and help us build the best advertising platform for mobile developers. You'll work on a system that processes hundreds of thousands of requests per second and conducts a real-time auction to find and deliver the most effective ads from our global partners. We trust our engineers to own this critical system and handle the full life cycle of feature development, from initial design all the way to shipping into production. Our system is written in functional Scala and has plenty of opportunities to flex your distributed, low-latency programming muscle, using technologies like mongoDB, protocol buffers and others. What you’ll be doing: Responsible for designing, implementing and testing the functionality of our Exchange product Work effectively with other engineers, system architects, and Operations teams to implement enhancements and issue resolutions Participate in technical discussions; come up with innovative ways to improve the product and process Troubleshoot issues with application, technologies, and infrastructure Continuously improve your technical knowledge Think creatively and work independently - collaborating with others as needed to maximize efficiency and throughput Deliver quality work on time while driving developer productivity across the organization You’re the type of engineer that appreciates clean code and has experience in writing unit tests to keep the utmost in code quality Qualifications: BS in Computer Science or related field 2+ years of Scala programming experience, along with experience in other programming languages such as java, or python. 6+ years of software engineering experience You have an understanding of microservices and hands-on experience implementing them You are experienced with software development in high-capacity, high-traffic, high-availability websites/systems You have experience working with Agile development The following experience would be a plus: Advertising technology experience Experience with Python or Java NoSQL databases (MongoDB, Bigtable, Aerospike etc) Distributed messaging services, like Kafka, PubSub Strong skills in Data Engineering Experience Managing Cloud infrastructure (AWS or GCP) Familiarity with Git and/or Bitbucket Benefits: International work environment Flexible working schedule with a hybrid working model (3 days from the office) Annual performance bonus (up to 8%) One month of workation (work from any location worldwide for one month) Multikafeteria

🏢 Summary: Full-stack engineering role focused on building and shipping production AI-powered features that automate logistics billing and payments. The position involves working across frontend, backend, and infrastructure to deliver scalable, high-quality solutions in a fast-paced early-stage environment. Engineers collaborate cross-functionally and leverage modern AI tools to accelerate development and impact core product decisions. 🗂️ Requirements: Minimum 2 years of software engineering experience, Experience with TypeScript, Experience with React, Experience with Node.js, Experience with GraphQL, Experience shipping products end-to-end in early-stage environments, Ability to work across frontend, backend, and infrastructure layers, Willingness to work onsite in SF or Chicago three days per week 📃 Skills: TypeScript, React, Node.js, GraphQL, Relay, Prisma, NestJS, PostgreSQL, Kafka, Redis, Elasticsearch, AWS, CDK, Fargate, ECS, Vite, AntDesign 🏢 Description: About Loop Loop is the data platform for the global supply chain. Logistics runs on messy, unstructured data—trapped in PDFs, emails, and legacy systems. We use AI to structure this chaos, creating a "source of truth" that automates payments and audits for the Fortune 100. We are building the financial nervous system for a $100 trillion physical economy. Our technology ensures freight moves efficiently and carriers get paid instantly. Backed by Founders Fund, Index Ventures and 8VC, we are scaling rapidly. We are looking for engineers ready to deploy production AI that powers the physical economy. About YouAs a full-stack engineer, you will work closely with founders and customers to understand and solve their logistics billing and payment pain points. You will help define the product and ship features that directly impact our customers. You will face and solve many complex technical challenges while you receive guidance and feedback from the team. You will shape the Loop DNA and define how we grow as a company. Responsibilities Work cross-functionally with product, design, and sales to understand requirements and ship thoughtful solutions. Write high-quality code optimized for extensibility. Engage in code reviews to maintain a high bar of engineering excellence. Lead discussions and documentation to communicate and arrive at the best technical design. Work across different component boundaries, from frontend to backend, and even infrastructure layers. Adopt AI technologies such as Cursor/Codex/Claude to accelerate software development and champion adoption of AI tools across the organization for increased productivity. Promote better practices and share technical knowledge across the team. Help grow Loop through deliberate feedback on product, process, and culture. Qualifications Willing to work in the SF or Chicago office three days a week Two years of software engineering experience. Experience with TypeScript and tools such as GraphQL, Relay, React, and Node.js. Experience working at early-stage companies where you shipped products end-to-end and wore many hats. Under the Hood Infrastructure: AWS, CDK, Fargate ECS Backend: TypeScript, Node.js, Prisma, NestJS, PostgreSQL, Kafka, Redis, Elasticsearch, GraphQL Frontend: TypeScript, React, Relay, Ant Design, Vite, GraphQL Compensation Base pay 150k+ per year Benefits & Perks Premium Medical, Dental, and Vision Insurance plans Insurance premiums covered 100% for you Unlimited PTO Fireside chats with industry leading keynote speakers Generous professional development budget to feed your curiosity Physical and Mental fitness subsidies for yoga, meditation, gym, or ski memberships Why you should join Loop? #LI-LOOP

🏢 Summary: Backend Software Engineer role focused on building and optimizing a high-traffic mobile advertising exchange platform processing hundreds of thousands of requests per second. The position involves designing, implementing, and testing core exchange functionality, including migrating systems from Scala to Java. Engineers own the full development lifecycle in a distributed, low-latency environment. 🗂️ Requirements: BS in Computer Science or related field, 6+ years of software engineering experience, 1+ years of Scala programming experience, 2+ years of Java programming experience, Experience with microservices architecture, Experience with high-traffic, high-availability systems, Experience working in Agile environment, Experience writing unit tests 📃 Skills: Scala, Java, MongoDB, Bigtable, Aerospike, Kafka, PubSub, Python, AWS, GCP, Git, Bitbucket, Microservices, ProtocolBuffers 🏢 Description: LoopMe is the leading in-app monetization and programmatic advertising platform. We reach a mobile audience of over 900 million monthly unique users globally and process over 200 billion ad requests. The Chartboost SDK is the highest-integrated independent mobile ad SDK, and through the Chartboost Exchange, Ad Network and other services, we empower mobile app developers to build businesses while connecting advertisers to highly engaged audiences. What we need We are looking for a backend software engineer to join our exchange team and help us build the best advertising platform for mobile developers. You'll work on a system that processes hundreds of thousands of requests per second and conducts a real-time auction to find and deliver the most effective ads from our global partners. We trust our engineers to own this critical system and handle the full life cycle of feature development, from initial design all the way to shipping into production. Our primary system is written in functional Scala and has plenty of opportunities to flex your distributed, low-latency programming muscle, using technologies like MongoDB, protocol buffers and others. We’re planning on moving away from Scala to Java over the next few years, so be prepared to help us with that transition. What you’ll be doing Responsible for design, implementation and testing the functionality of our Exchange product Help translate our advertising exchange from Scala to Java Work effectively with other engineers, system architects, and Operations teams to implement enhancements and issue resolutions Participate in technical discussions; come up with innovative ways to improve the product and process Troubleshoot issues with the application, technologies, and infrastructure Continuously improve your technical knowledge Think creatively and work independently - collaborating with others as needed to maximize efficiency and throughput Deliver quality work on time while driving developer productivity across the organization You’re the type of engineer who appreciates clean code and has experience in writing unit tests to keep the utmost in code quality Who you are BS in Computer Science or related field 1+ years of Scala programming experience 2+ years of Java programming experience 6+ years of software engineering experience You have an understanding of microservices and hands-on experience implementing them You are experienced with software development in high-capacity, high-traffic, high-availability websites/systems You have experience working with Agile development The following experience would be a plus: Advertising technology experience Experience with Python or Java NoSQL databases (MongoDB, Bigtable, Aerospike, etc.) Distributed messaging services, like Kafka, PubSub Strong skills in Data Engineering Experience Managing Cloud infrastructure (AWS or GCP) Familiarity with Git and/or Bitbucket Benefits: International work environment Flexible working schedule with a hybrid working model (3 days from the office) Annual performance bonus (up to 8%) One month of workation (work from any location worldwide for one month) Multikafeteria

🏢 Summary: Full-stack Software Engineer role focused on designing, building, and maintaining scalable web applications, APIs, and backend services in an AI-first engineering environment. The position emphasizes ownership of AI-assisted development, rigorous code review, test coverage, and reliable CI/CD practices. Engineers collaborate cross-functionally and are accountable for production outcomes across the product lifecycle. 🗂️ Requirements: 2–4+ years experience building web applications, backend services, or APIs, Hands-on experience using AI agents in software development workflows, Ability to review and validate AI-generated code, Experience working in agile and CI/CD environments, Commitment to writing well-tested, reliable software, Strong ownership of production outcomes 📃 Skills: PHP, Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless, APIs, CI/CD 🏢 Description: About the Role: Loop is looking for a full-stack Software Engineer to contribute directly to the design, development, and maintenance of core products. You'll build scalable solutions, uphold technical excellence, and be a reliable partner to the engineers around you. AI at Loop Engineering Engineering is AI-first; not aspirationally, but operationally. Every engineer is provisioned with Claude Code and Cursor, and AI agents are the default starting point before opening a file. The role has shifted: you are not primarily a writer of code. You are the judgment layer, determining what should be built, validating that what was built is correct, and owning the outcome in production. AI handles a growing share of implementation, and you own everything that surrounds it. Our Tech Stack: PHP/Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless. The hiring process is tech-stack agnostic. What You'll Do - Design, build, and maintain web applications, APIs, backend services, and lambdas for the product line - Start with the agent, not the editor; invest time in planning and intent articulation - Review AI-generated code with rigor and ensure correctness - Include meaningful test coverage in every PR and contribute to a healthy CI/CD process - Collaborate closely with engineers, product managers, and designers - Exhibit ownership: ensure features are stable in production, flag risks early, and make reversible decisions fast - Improve system effectiveness beyond immediate scope, including code review quality and cross-team visibility Your Experience - 2–4+ years building web applications, backend services, or APIs - Use AI agents as a default starting point and articulate your workflow for planning, prompting, and reviewing - Experience identifying and correcting issues in AI-generated code - Clear perspective on where AI adds value and where it introduces risk - Experience with PHP/Laravel, AWS Serverless, or Vue.js is a strong plus - Experience working in agile, CI/CD environments - Commitment to building well-tested, reliable software - Ability to learn from mistakes, seek feedback, and grow through iteration

🏢 Summary: Opportunity to join an AI Ops team building and scaling AI-powered automation systems for global supply chain operations, partnering closely with engineering, product, and customers to drive adoption and deliver measurable value. The role focuses on deploying intelligent workflows, translating complex technical systems for users, and embedding with customer and operations teams to enhance execution. This is an onsite position in Chicago, San Francisco, or New York City. 🗂️ Requirements: College degree in analytics, finance, economics, STEM or related quantitative field, 1+ year experience in technology, data analysis or other technical quantitative field, Ability to understand complex technical systems and translate them for users, Experience working cross-functionally with engineering, product, or operations teams, Onsite availability 4+ days per week in Chicago, San Francisco, or New York City 📃 Skills: SQL, Python, Excel, Automation, Data, AI 🏢 Description: About the Role Loop is building an AI ops team that will own key automation and intelligence systems as Loop builds and scales them across its customer base. The team is disrupting traditional operations with AI-powered workflows that create 100X leverage for users, turning operators into analysts. Responsibilities include close partnership with engineering and product teams, internal roll-out of new systems and products, and driving adoption across the user base. This role requires a deep understanding of systems and their users (internal and external), the ability to translate complex technical work to everyday users, and strong problem-solving skills. This is an in-person role based in Chicago, San Francisco, or New York City, with the expectation of being onsite 4+ days per week. What You'll Do - Accelerate delivery of new product capabilities for global brands by understanding how customer outcomes are driven - Embed with customer, product, and operations teams to deliver increased customer value - Partner with AI engineers to deploy systems and products that automate workflows, reduce manual work, and improve user experience - Demonstrate strong execution skills and deep knowledge of the product offering and customer pain points - Build and maintain relationships with internal customer-facing stakeholders to ensure value delivery About You - College degree with a quantitative background in analytics, finance, economics, or similar STEM field - 1+ years of work experience in technology, data analysis, or other technical and quantitative fields - Ability to balance eagerness to learn with strong execution and problem-solving skills - Team-oriented mindset with interest in fast-paced, high-growth environments - Advanced Excel skills and SQL, Python, or other programming experience are a plus Compensation and Benefits The base pay range for this role is $80,000 to $125,000 annually, depending on experience, skills, qualifications, location, and business needs. In addition to base salary, the role may be eligible for equity. Benefits include health, dental, and vision insurance, 401(k) match, paid time off, paid holidays, and parental leave. Equal Opportunity The company is an equal opportunity employer committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration without regard to legally protected characteristics.

🏢 Summary: Forward Deployed Engineer role focused on embedding with enterprise customers to design, build, and ship integrated solutions on top of an AI-driven logistics data platform. You will lead technical discovery, integrate complex legacy systems (ERP, TMS, EDI, payments), and deliver production-ready solutions that drive measurable client results. The position combines hands-on engineering, customer-facing ownership, and early-stage function building in a high-growth environment. 🗂️ Requirements: 3-5 years of software engineering experience, Hands-on integration experience with enterprise systems (ERP, TMS, EDI, payment systems or similar), Strong production-level coding ability, Experience shipping end-to-end solutions in early-stage or high-growth environments, Ability to work in ambiguous, customer-facing environments with minimal oversight, Strong ability to translate technical constraints into business language 📃 Skills: APIs, EDI, ERP, TMS, Payments, Integration, Data, LegacySystems 🏢 Description: About You Loop is bringing AI to an industry that still runs on PDFs, phone calls, and tribal knowledge. You are 75% engineer, 25% product-founder mind. You write production code and navigate legacy systems with equal confidence, and translate customer needs into buildable requirements. You have real integration experience with enterprise customer systems. As a Forward Deployed Engineer, you will operate embedded with customers, learning their operations and building working solutions that drive client results and feed product direction. You own the problem end-to-end, from commercial discovery through technical delivery. This is an engineering role with autonomy to shape how an early-stage function operates. This role is on-site 4+ days per week through a combination of customer visits and in-person collaboration. What You'll Do - Qualify opportunities and lead technical discovery: map customer systems, assess technical fit, and produce scoped project plans. - Embed with customers to build and ship working solutions, iterate on feedback, and deliver a working v1 using platform primitives or custom builds. - Integrate customer systems with the platform including APIs, EDI feeds, ERPs, TMS platforms, and payment systems, handling complex underlying data. - Own customer relationships and deployment timelines, run meetings and demos, and travel to customer sites as needed. - Debrief deployments to identify repeatable patterns and productization opportunities. - Help refine processes and contribute to the team playbook. Qualifications - 3-5 years of software engineering experience. - Hands-on integration experience with enterprise customer systems such as ERPs, TMS platforms, EDI feeds, payment systems, or comparable legacy environments. - Strong coding skills meeting a high engineering bar and comfort navigating legacy systems. - Experience at early-stage or high-growth companies delivering end-to-end solutions. - Comfortable in ambiguous, customer-facing environments. - Strong communication skills across technical and business stakeholders. Nice to Have - Experience owning full-cycle customer deployments from discovery to shipping v1. - Background as Forward Deployed Engineer, implementation engineer, technical founder, field engineer, or applied AI engineer deploying into enterprise workflows. - Domain experience in supply chain, logistics, freight, or transportation. - Founder experience or leading technical initiatives from zero. Compensation and Benefits - Base salary range: $150,000 to $260,000 annually. - Eligibility for equity. - Health, dental, and vision insurance. - 401(k) match. - Paid time off and paid holidays. - Parental leave.

🏢 Summary: Senior Java Backend Engineer role focused on building and optimizing a high-load ad-serving system processing over 5 million requests per second with strict latency goals. The position involves designing critical-path components, implementing architectural improvements, and enhancing performance in a real-time bidding platform. The role emphasizes scalability, low-latency optimization, and distributed systems engineering in a microservices environment. 🗂️ Requirements: 5+ years backend engineering experience, Strong Java proficiency, Experience with Spring or Spring Boot, Hands-on SQL experience, Experience with PostgreSQL or other relational databases, Knowledge of microservices architecture, Proficiency with Linux shell, Experience with Docker 📃 Skills: Java, Spring, SpringBoot, SQL, PostgreSQL, Linux, Docker, gRPC, ProtocolBuffers, Reactor, WebFlux, Kafka, Kubernetes, JFR, async-profiler, JVM, Testcontainers, ClickHouse, Aerospike, Redis, Micrometer, Prometheus, Grafana 🏢 Description: Are you eager to work with advanced technologies and build high-performance applications capable of processing over 5 million requests per second? If yes, we have an ideal opportunity for you at LoopMe. We are a team of experienced engineers developing and supporting real-time bidding platforms for global advertisers. You will work daily with talented engineers, using technologies such as Java, Spring Boot, gRPC, Project Reactor, Kafka, ClickHouse, PostgreSQL, Aerospike, and Redis. Your main focus will be on enhancing performance, optimizing cloud infrastructure, and developing innovative features across our product range. Join us in our mission to expand the limits of possibilities in the advertising industry! We are seeking a Senior Java Backend Engineer to join our Marketplace team and help develop our high-load ad-serving system, which can process more than 5 million requests per second with a 200ms response time. What you’ll be doing Designing and tuning hot-path components for the ad-serving critical path—such as throttling, rate limiting, targeting indexes, and DSP adapters. Implementing architectural changes across services — including RTB request lifecycle, deals targeting, and multi-impression-key processing. Creating gRPC APIs and Protocol Buffers schemas to facilitate cross-team integrations. Profiling and minimizing CPU usage and allocations to achieve strict p99 latency goals. Strengthening the system architecture to guarantee smooth operation during peak load times. Integrating advanced targeting algorithms into the main ad delivery process. Collaborating closely with multiple teams to provide services and data for our solutions. Core qualifications Over five years of experience in backend engineering. Solid understanding of Java and Spring / Spring Boot. Hands-on experience with SQL and familiarity with PostgreSQL or other relational databases. Strong knowledge of microservices architecture and its best practices. Proficient in Linux shell and Docker. Additional experience we’d value Concurrency in Java includes java.util.concurrent, CompletableFuture, lock-free data structures, virtual threads / Project Loom, and Reactor schedulers. gRPC and Protocol Buffers Project Reactor / Spring WebFlux Kafka Kubernetes Experience in managing high-QPS services, including profiling with JFR and async-profiler, GC tuning, and JVM internals understanding. Robust testing culture with unit tests, functional tests, and Testcontainers. Extra pluses AdTech / RTB domain expertise — OpenRTB, DSP/SSP, IVT, deals, cookie-sync, ads.txt, schain Performance engineering on critical paths — utilizing fastutil / Eclipse Collections, creating allocation-aware code, and optimizing for JIT awareness. Distributed systems experience includes rate-limiting algorithms such as token bucket, fixed and slidingwindow, as well as back-pressure, circuit breakers, sharding, and consistent hashing. Observability tools include Micrometer, Prometheus, Grafana, and structured logging. Full responsibility for managing multi-week epics across multiple teams. Experience with analytical or in-memory databases such as ClickHouse, Aerospike, Redis. Benefits Flexible working schedule with a hybrid type of work Annual performance bonus One month of workation (you can work from any part of the world for one month) Multikafeteria

🏢 Summary: Senior Software Engineer role focused on owning complex, cross-functional initiatives across the full stack, from architecture to production. The position emphasizes AI-first engineering practices, leveraging AI agents for planning, code generation, and review while maintaining accountability for production outcomes. You will design scalable systems, lead technical initiatives, and mentor engineers while working with modern cloud and web technologies. 🗂️ Requirements: 5+ years of experience building web applications, backend services, and APIs, Strong experience with PHP and Laravel, Experience designing and implementing full-stack features (backend, APIs, frontend), Ability to design system architecture and evaluate technical trade-offs, Experience leading technical initiatives, Experience mentoring junior engineers, Experience working with AI coding agents in development workflows, Experience monitoring and owning production systems 📃 Skills: PHP, Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless, APIs, Lambdas, AI, Claude, Cursor 🏢 Description: About the Role: Loop is looking for a Senior Software Engineer to take meaningful ownership of complex, cross-functional work, from architecture and design through production. You'll build scalable solutions, influence technical direction, and make the engineers around you better. AI at Loop Engineering: Engineering at Loop is AI-first, not aspirationally, but operationally. Every engineer is provisioned with Claude Code and Cursor, and we expect AI agents to be your default starting point before you open a file. The role has shifted: you are not primarily a writer of code. You are the judgment layer, the person who determines what should be built, validates that what was built is correct, and owns the outcome in production. At the senior level, that judgment extends beyond your own work to the systems, standards, and people around you. You're not just using AI well — you're helping your team develop the habits and instincts to use it well too. Our Blended Work Environment: We work from our HQ in Columbus, OH, and are distributed throughout the United States, select Canadian provinces, United Kingdom, and Australia. For this position, we're open to Columbus, OH; Boston, MA; Chicago, IL; Austin, TX; Los Angeles, CA; or fully remote. Our Tech Stack: PHP/Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless. Our hiring process is tech-stack agnostic. What You'll Do: - Design and implement complex, high-quality features across the full stack: backend services, APIs, lambdas, and frontend. Translate ambiguous requirements into clear technical designs and own the trade-offs. - Start with the agent, not the editor. Invest time in planning and intent articulation. The quality of your prompt is the quality of your output. - Review AI-generated code with the same rigor you'd apply to any code. Plausible is not the same as correct. At this level, you're also setting the standard for how your team does this. - Set the standard for AI-assisted code review on your team. Model what good verification looks like, not just for your own PRs, but in how you give feedback on others' AI-generated work. - Lead small to medium-sized technical initiatives: provide direction, surface dependencies early, and keep stakeholders informed without being asked. - Mentor and develop more junior engineers through code review, pairing, and direct feedback. Making the people around you better is part of the job, not a bonus. - Make reversible decisions fast and flag the irreversible ones early. Operational trust means others can plan around your delivery. - Make the system around you more effective, not just your own output. Propose improvements to code quality, processes, and team norms, and follow through on them. Your Experience: - 5+ years building web applications, backend services, and APIs. Strong PHP/Laravel experience preferred. - You use AI agents as your default starting point and can describe your actual workflow: how you plan, prompt, evaluate output, and decide where to spend your review time. You own what ships, regardless of how it was generated. - You have a point of view on where AI helps and where it gets engineers into trouble, and you actively help your team navigate that line. - You track how your code behaves in production, not because someone asks you to, but because you own the outcome. You've caught regressions before support tickets did. - You can evaluate architectural trade-offs and make defensible decisions, not just implement what you're handed. - You have examples of leading technical initiatives, mentoring engineers, and driving cross-functional alignment. - You operate with intensity and hold a high bar for your own work and for the people around you. You give direct feedback, ask for help early, and respond to setbacks with ownership rather than withdrawal. - You've worked closely with product managers and design teams, and you've had the hard conversations with peers, stakeholders, or leaders, with directness and care.