Mid-Senior Backend Engineer

Join our innovative team at Devexperts as a Backend Engineer, where your skills will contribute to one of the premier trading platforms in the USA, catering to over 200,000 online users daily across multiple devices. Our advanced infrastructure supports over 1 million requests per second, ensuring seamless operations. Your role will encompass the backend services that manage crucial trading processes, including order issuance, validation, routing, execution, option price calculation, and reconciliation. We emphasize high performance, low latency, and robust fault tolerance in our development practices. Through meticulous code reviews and various testing methodologies, we uphold the highest code quality standards.As a Backend Engineer, you will take ownership of backend services, infrastructure, and data systems, tackling complex scalability challenges while deepening your expertise in U.S. financial systems. Your contributions will have a direct impact on products that serve millions.

Position OverviewJoin our innovative team at condukt as a Senior Backend Engineer, where you'll play a pivotal role in shaping the design and architecture of our core platform. Collaborating closely with the founding team, you will help us deliver exceptional value to our clients.As part of an early-stage startup, we take pride in our hands-on approach to building solutions from the ground up. You will have the opportunity to frequently ship code, iterate rapidly based on user feedback, and uphold the stringent security, performance, and uptime standards our clients expect.We are passionate about building, scaling, and growing. Our leadership team boasts a proven track record in product development, team scaling, and driving growth. Our talented engineers join us from top tech companies and unicorns.If you are enthusiastic about transforming complex challenges into simple, elegant solutions, this is the perfect role for you. You will have a significant opportunity to influence our engineering culture from the ground up.

Sword Health is revolutionizing the healthcare landscape by transitioning from a human-first to an AI-first model through its innovative AI Care platform. This groundbreaking approach ensures that world-class healthcare is accessible at any time and from anywhere, significantly lowering costs for payers, self-insured employers, national health systems, and other healthcare organizations. Since its inception, Sword has transformed pain management with AI at its core and has expanded its services to women's health, movement health, and more recently mental health. With over 700,000 members across three continents and 10 million AI sessions completed, Sword's 1,000+ enterprise clients have collectively saved over $1 billion in unnecessary healthcare expenses. Supported by 42 clinical studies and holding over 44 patents, Sword Health has successfully raised more than $500 million from top-tier investors, including Khosla Ventures, General Catalyst, Transformation Capital, and Founders Fund. Discover more at www.swordhealth.com.At Sword, we are reimagining healthcare by merging advanced AI/ML technology with personalized care solutions. As a Senior Backend Engineer on our AI Team, you will be integral in building, scaling, and optimizing the infrastructure that underpins our machine learning-powered clinical features, decision support systems, and forthcoming innovations in Generative AI.You will collaborate closely with cross-functional teams to ensure that Sword’s products are resilient, scalable, and secure, providing both internal and external users with effortless access to personalized, data-driven healthcare solutions.If you are a backend engineer passionate about exploring the depths of AI, this opportunity is tailored for you.

At Mindera, we are dedicated to assembling an exceptional team, and we invite you to be a part of it. We are in search of skilled Kotlin/Java Backend Developers who have a genuine enthusiasm for tackling intricate challenges. Within our Agile and collaborative setting, you will take charge of the technical components of development, creating high-quality software systems. Leveraging your proficiency in Kotlin or Java (if you are keen to work with Kotlin), you will design and implement resilient and scalable backend solutions. Your contributions will span the entire software development lifecycle, encompassing requirements gathering, design, coding, testing, and deployment. We prioritize collaboration, knowledge sharing, and continuous learning at Mindera. You will have the chance to collaborate with talented individuals, mentor junior developers, and play a crucial role in the team's growth and success. If you flourish in a fast-paced, innovative environment and have a passion for working with cutting-edge technologies, Mindera is the ideal place for you.

At Mindera, we are on a mission to build exceptional software solutions and are actively seeking a talented Senior Backend Developer with expertise in Java or Kotlin. Join our dynamic and innovative team where collaboration and creativity are at the forefront. You will have the opportunity to tackle complex challenges while developing high-quality backend solutions in an Agile environment.Your role will involve taking ownership of the development process, from the initial requirements gathering to design, coding, testing, and deployment. You will leverage your skills in Kotlin or Java to create robust and scalable systems that push the boundaries of technology.We prioritize a culture of knowledge sharing and continuous learning, providing you with the chance to mentor junior developers and contribute significantly to our team's success. If you thrive in a fast-paced, cutting-edge environment and are passionate about technology, Mindera is the ideal place for you.

Join Farfetch as a Senior Observability Engineer and play a key role in enhancing our platform's performance and reliability. You will be responsible for designing and implementing observability solutions that enable our teams to monitor, troubleshoot, and optimize our services effectively.Your expertise will help us to ensure a seamless user experience by developing robust monitoring frameworks and analytics solutions. Collaborate with cross-functional teams to identify and resolve issues quickly, ensuring our systems operate at peak performance.

Join our dynamic team at NielsenIQ as a Senior Antibot Engineer, where you will be at the forefront of developing cutting-edge solutions to enhance our digital security measures. In this role, you will leverage your expertise to analyze and combat bot-related threats, ensuring the integrity of our platforms. Work collaboratively with cross-functional teams to design and implement robust anti-bot frameworks that protect our data and user experience.

Join the innovative team at Farfetch as a Senior Platform Engineer. In this role, you will leverage your expertise to design, develop, and maintain robust platform solutions that enhance our e-commerce ecosystem. You will collaborate closely with cross-functional teams and contribute to the architecture of our systems, ensuring they are scalable, efficient, and secure.

Join Pixelmatters, a premier digital product studio. We are a collaborative team of strategists, designers, and engineers dedicated to crafting exceptional digital products.Our mission is to empower businesses by delivering high-quality digital solutions while nurturing meaningful relationships. We envision a future where outstanding user experiences are commonplace, inspiring both businesses and individuals to reach their fullest potential.We want you—a detail-oriented, inquisitive, and flexible Senior Staff Engineer—to architect and oversee the development of scalable, high-performance digital products across the entire technology stack. Your blend of profound technical knowledge and strong leadership will position you as a key technical resource across various teams, driving engineering excellence throughout our projects.Your responsibilities will center on designing and refining robust full-stack architectures utilizing NestJS and React, deployed on AWS infrastructure. You will be instrumental in shaping technical decisions, leading architectural discussions, and ensuring that our solutions are secure, scalable, and maintainable. Additionally, you will assist teams in overcoming complex technical challenges and establishing best practices within the engineering organization. Your involvement will span all phases of product development, from front-end architecture and API design to database modeling, infrastructure, and deployment workflows. While you will remain hands-on as necessary, your role will also emphasize providing technical guidance, mentoring fellow engineers, and ensuring long-term architectural integrity across projects.Daily tasks will include contributing to system architecture decisions, reviewing intricate technical implementations, guiding teams in designing scalable front-end and back-end solutions, enhancing CI/CD pipelines and infrastructure practices, mentoring engineers, and proactively identifying opportunities to boost performance, reliability, and security across our platform.

Join our comprehensive course designed to offer participants a robust and hands-on foundation in backend test automation. This program utilizes Postman, Newman, and Playwright, with JavaScript and TypeScript as the primary programming languages. Throughout the course, students will master how to design, automate, and execute API tests, validate business rules, navigate authentication flows, and seamlessly integrate automated tests into Continuous Integration (CI) pipelines. Our curriculum goes beyond mere request validation, concentrating instead on strategic backend quality, effective test architecture, and real-world automation techniques that align with contemporary development practices.Course OutlineModule 1: Backend Foundations & First API CallsContent:Introduction to essential backend concepts, client-server architectures, HTTP fundamentals, RESTful APIs, HTTP status codes, JSON data structures, making API calls with GET requests, understanding API responses, and validating crucial data structures.Module 2: Advanced API Calls & Response ValidationContent:Students will delve into additional API endpoints, utilize query parameters and pagination, and perform comprehensive response validations. The focus will be on analyzing JSON structures and validating arrays and nested objects, enhancing critical backend testing skills.Module 3: Test Automation with Postman ScriptsContent:This module introduces API test automation through Postman. Participants will learn to write JavaScript test scripts, create assertions, manage environment variables, and professionally organize collections to shift from manual API testing to structured, automated validation.Module 4: Introduction to Playwright for API TestingContent:Students will transition from Postman to code-based automation via Playwright using JavaScript/TypeScript. This module covers project structuring, scalable test architecture, and automated API validation through a modern testing framework.Module 5: Advanced API Automation & Test ArchitectureContent:This module enhances Playwright API automation by implementing reusable request contexts, data-driven testing approaches, and structured test organization. Learners will discover how to develop maintainable and scalable backend test suites.Module 6: Integration Workflows & Data Validation

Join our innovative team at Devexperts as a Senior Systems/Networks Engineer (Tier 3). In this pivotal role, you will be responsible for designing, implementing, and maintaining complex network systems, ensuring optimal performance and reliability. You will collaborate closely with cross-functional teams to resolve technical issues and support our clients in achieving their business goals.

As we continue to expand, we are eager to connect with exceptional tech professionals and keep an open channel for future opportunities. This is a unique talent pool opportunity in Portugal, allowing us to gather spontaneous applications to create a robust pipeline of skilled individuals for when relevant positions arise.We are actively seeking talented Java Backend Developers who are enthusiastic about joining our Research & Development teams when future opportunities present themselves.Our teams focus on building and maintaining high-performance, low-latency platforms that serve thousands of users globally every day. The backend services we develop manage intricate business processes such as order processing, validation, routing, data reconciliation, and critical performance calculations. We prioritize code quality, reliability, and scalability, achieving these through meticulous design, peer reviews, and rigorous testing. Our engineers thrive in multicultural, distributed teams, collaborating with QAs, frontend developers, business analysts, and product stakeholders in an agile (Scrum/Kanban) environment.Technologies We Work With:Core Java (11+): Collections, Streams, Threads, Concurrency, JVM tuningFrameworks & Tools: Spring, JUnit5, AssertJ, MockitoInfrastructure: Docker, PostgreSQL, Liquibase, SplunkCollaboration & CI/CD: Atlassian suite, Slack, TeamCity, SonarOur Team Culture:We are passionate about coding in Java and exploring how things function at a deeper level (threads, collections, memory, JVM).We leverage strong foundations in computer science to tackle complex problems with efficient solutions.We value the creation of clean, maintainable, and well-tested code.We take ideas from concept to production and celebrate achievements as a team.We foster a collaborative, supportive, and feedback-driven environment across various cultures and time zones.We communicate primarily in English (B2+).

About Us: Nitro Software Inc. is a leading global SaaS provider dedicated to creating seamless digital document workflows. We offer a comprehensive suite of solutions including PDF, eSigning, identity verification, and analytics, all backed by an exceptional customer success and change management team. With over 3 million licensed users and more than 13,000 business clients across 157 countries, we proudly serve 67% of the Fortune 500. Our Work Culture: At Nitro, we strive to cultivate an environment where talented individuals are empowered to thrive. We value collaboration, innovation, and engagement among our team members. Our work is guided by five core principles: One Team, One MissionWe are united in our commitment to Nitro's mission, fostering an environment where everyone feels like a valued contributor. Own ItWe embrace accountability for our actions and decisions, empowering each other to lead with confidence and a solutions-oriented mindset. Accountable to Our CustomersWe prioritize our customers and uphold our commitments, ensuring we deliver on our promises. Excellence in ExecutionOur passion and precision drive us to deliver innovative, high-quality results. Be Bold, Fail Fast, Learn FasterWe embrace learning through growth, encouraging experimentation and courageous questioning as we strive for continuous improvement. These guiding values shape our work approach and encourage everyone to contribute their best. Why Join Nitro Engineering: Engineering plays a pivotal role at Nitro, shaping the products and services at the core of our business and helping us realize our vision of smarter documents in the future. Our engineering team is diverse, passionate, and dedicated to building the right solutions the right way.

Join Sword Health as a Senior iOS Engineer and be a part of our mission to revolutionize healthcare. Our AI Care platform is transforming the healthcare landscape, making quality care accessible anytime and anywhere. As a key member of our technology team, you will leverage your expertise in iOS development to enhance our innovative solutions across various health domains, including pain management, women's health, movement health, and mental health. Help us empower over 700,000 members globally with your skills and contribute to significant cost savings in healthcare.

Join our innovative tech team at Farfetch as a Senior Security Engineer. In this pivotal role, you will safeguard our digital assets and infrastructure while implementing advanced security protocols to protect customer data. Collaborate with cross-functional teams to build resilient security architectures and respond to potential threats swiftly.We are looking for a proactive and experienced individual who is passionate about security and technology. You will play a crucial role in developing and maintaining security frameworks that align with our business objectives.

Position OverviewJoin Condukt as a Senior Platform Engineer and take charge of evolving the infrastructure that underpins our distributed systems. You will play a pivotal role at the intersection of platform engineering, reliability, and developer experience, enabling our product and AI teams to deliver quickly, safely, and at scale.As a fast-growing company in its early stages, we seek engineers who embrace ownership, think systemically, and thrive in uncertain environments. In this position, you will design and uphold the foundational systems for our engineers while ensuring reliability, observability, and incident response across a complex, real-time platform serving regulated financial institutions.If you thrive on tackling challenging infrastructure problems, prioritize reliability and operational excellence, and aspire to influence both our platform and company direction, this role is perfect for you.Key Responsibilities:Design, implement, and sustain internal developer platforms that facilitate self-service deployments, testing, and observability.Own and enhance CI/CD pipelines for application and AI workloads, minimizing friction and bolstering deployment safety.Define, monitor, and continuously refine SLIs and SLOs across distributed systems.Participate in on-call rotations, lead incident response, and conduct blameless post-mortems to foster long-term reliability improvements.Proactively identify risks related to reliability, scalability, and performance, leading initiatives to bolster system resilience.Implement automation to reduce operational toil and enhance mean time to recovery.Manage and optimize Condukt’s cloud infrastructure on GCP (GKE, Cloud Run, Pub/Sub, BigQuery, etc.).Maintain and fine-tune Elasticsearch clusters that support search and indexing workloads.Configure and optimize Cloudflare for enhanced edge performance, security, and reliability.Drive cost efficiency in cloud usage without sacrificing performance or reliability.Collaborate closely with Product, Engineering, and AI teams to address platform needs and roadmap decisions.

Join Our Team:Nitro Software Inc. is a global leader in Software as a Service (SaaS) that simplifies digital document workflows. We provide an integrated suite of solutions including PDF management, eSigning, identity verification, and analytics, all backed by our exceptional customer success and change management teams. With over 3 million licensed users and more than 13,000 business customers in 157 countries, we proudly serve 67% of the Fortune 500.Our Culture:At Nitro, we strive to foster an environment where talented individuals can thrive. Collaboration, innovation, and engagement are at the core of our operations, guided by five key principles:One Team, One Mission: Our unified commitment to Nitro's mission shapes our culture.Own It: We empower each other to take ownership of our actions and decisions.Accountable to Our Customers: We honor our commitments and prioritize customer satisfaction.Excellence in Execution: Our passion and precision drive us to deliver top-quality results.Be Bold, Fail Fast, Learn Faster: We promote a culture of learning through experimentation and iteration.These values create an inspiring atmosphere where every team member contributes their best.Why Nitro Engineering:Engineering is integral to Nitro, as we develop the products and services that form the backbone of our business today and shape the future of smart document solutions. Our diverse and talented engineering team is dedicated to building the right products the right way.

Luxclusif is a cutting-edge global B2B platform founded in 2013 and integrated into the Farfetch family since 2021. Our mission is to transform the luxury landscape by providing access to premium pre-owned fashion for a worldwide clientele. Luxclusif has set the standard in the global luxury resale market with sophisticated data-driven solutions that streamline the buying and selling of high-end pre-owned items. With our operations spanning the globe and strategically located warehouses, we ensure a flawless supply chain for luxury goods, maintaining high standards in item curation, quality control, logistics, technology integration, and sales, thereby delivering an unparalleled resale experience for brands, retailers, and consumers.THE TEAMOur Research and Development team is pivotal in designing, developing, and enhancing the internal products that fuel our business. As a B2B entity specializing in second-hand luxury items, we leverage technology to enhance every aspect of our operations, from procurement and inbound logistics to sales and post-sales support. Our diverse global team comprises talented individuals from Portugal, Brazil, and the Philippines.PORTOOur office is located near Porto, in the northern region of Portugal, within a dynamic business hub. It provides a vibrant and inclusive environment where our employees can connect and network with a broad community of tech professionals.THE ROLEAs a Senior Fullstack Engineer, you will become an integral part of our Porto hub, focusing on the development of internal products that support our business operations. You will collaborate closely with Product Managers, Designers, and fellow Engineers to define, plan, and execute projects, while fostering a culture of technical excellence.

Join Pixelmatters, a leading digital product studio. Our talented team of strategists, designers, and engineers is committed to crafting exceptional digital experiences.Our mission is to empower businesses to reach their full potential by delivering high-quality digital products while nurturing meaningful relationships. We aspire to create a world where outstanding user experiences become the standard, inspiring both businesses and individuals to excel.We are seeking a meticulous, adaptive Senior Full-Stack Engineer to join our dynamic team. You will play a crucial role in designing and delivering scalable, high-performance digital products across the entire stack. Your deep technical expertise and strong sense of ownership will contribute to building reliable solutions and upholding high engineering standards.In this role, you will focus on designing, implementing, and evolving full-stack architectures utilizing NestJS and React, deployed on AWS. You will engage in technical discussions to ensure the solutions we create are secure, scalable, and maintainable. Your involvement will span all phases of product development, from front-end implementation and API design to database modeling, infrastructure, and deployment workflows. While your primary focus will be on back-end development, your contributions across the full stack will be essential for delivering the product end-to-end.Your daily tasks will include designing scalable front-end and back-end architectures, developing and optimizing APIs, implementing complex UI components, defining database schemas, enhancing CI/CD pipelines, reviewing code, and proactively identifying performance, reliability, and security enhancements across the system.

Join our innovative team at welocalize as a Senior Prompt Engineer for Project Lion. This role is perfect for individuals who thrive in a dynamic environment, leveraging cutting-edge technology to develop and optimize prompts for AI applications. As part of this position, you will work closely with cross-functional teams to understand requirements and deliver high-quality solutions.