Senior Backend Software Engineer

Our MissionAt Alchemy, we strive to empower developers to bring web3 to life for a billion users, providing them with the essential tools to craft outstanding on-chain products. As the premier developer platform, we deliver robust APIs, SDKs, and tools that enable the creation and scaling of exceptional on-chain applications and rollups.Our infrastructure fuels 70% of the leading web3 teams, over 90% of web2 companies venturing into web3, and serves more than 100 million end users. Notable clients include top web3 brands like Polymarket, OpenSea, Circle, WorldCoin, as well as global giants like Shopify and Adobe.The Alchemy team is composed of experts with decades of experience in scalable infrastructure, AI, and blockchain technology, hailing from prestigious organizations and universities such as Google, Microsoft, Facebook, Stanford, and MIT.We are proudly backed by some of the world's foremost venture capital firms and institutions, including Lightspeed, Silver Lake, a16z, Coatue, Pantera, Addition, Stanford University, Coinbase, and Charles Schwab, among others.The RoleAs a Principal Software Engineer specializing in backend systems at Alchemy, you will collaborate on one of the most advanced and high-throughput distributed systems within the blockchain landscape. Your role will involve architecting and developing new systems, as well as enhancing existing ones, for a platform that supports millions of users worldwide.What You’ll Do:Establish the vision for the backend infrastructure that underpins our developer platform and APIs, leading the team in the successful execution of that vision.Design, develop, and maintain highly scalable and reliable infrastructure, APIs, and services.Lead system design discussions, facilitate stand-up meetings, and conduct code reviews.Develop and implement best practices for backend infrastructure focusing on high throughput, reliability, and low latency.Troubleshoot production issues across various services and levels of the stack.Work collaboratively with fellow engineers, technical leads, product managers, and designers.What We’re Looking For:10+ years of relevant industry experience.Bachelor’s degree in Computer Science or a related field.Proven experience in designing, building, scaling, and maintaining core backend software components (experience with API platforms is a plus).Strong problem-solving skills for complex design, scaling, latency, and performance challenges in high-throughput, low-latency production systems.

Join our dynamic team as a Senior Backend Software Engineer at Bolt, where you will tackle intriguing product challenges that include crafting complex algorithms for demand forecasting, optimizing real-time pricing, developing efficient routing solutions, implementing fraud detection mechanisms, and enhancing distributed systems. Our growth trajectory is impressive, and your expertise will play a pivotal role in our success.

Cresta is dedicated to transforming every customer interaction into a strategic advantage by harnessing the full power of contact centers. Our innovative platform merges cutting-edge AI with human expertise to enable contact centers to uncover customer insights, automate conversations, streamline processes, and empower every team member to enhance productivity. Established by the esteemed Stanford AI lab, Cresta is co-founded by Sebastian Thrun, renowned for his contributions to Google X, Waymo, and Udacity. Our leadership team includes CEO Ping Wu, co-founder of Google Contact Center AI and Vertex AI, along with Tim Shi, an early member of OpenAI.We have brought together a stellar team of AI and ML specialists, market leaders, and premier investors, including Andreessen Horowitz, Greylock Partners, Sequoia, and former AT&T CEO John Donovan. Our esteemed clients feature brands such as Intuit, Cox Communications, Hilton, and Carmax, and we have been recognized by Forbes and Bain Consulting as one of the top private AI companies globally.Join us in this exciting journey to reshape the workforce with AI. The future of work is at Cresta.

Cresta is revolutionizing the contact center industry by transforming every customer interaction into a strategic advantage. Our cutting-edge platform harnesses the power of AI alongside human intellect to deliver unparalleled customer insights, streamline communication processes, and empower teams to enhance their productivity. Founded by the visionary Sebastian Thrun, known for his groundbreaking work with Google X and Waymo, our team includes pioneering leaders in AI and machine learning, such as CEO Ping Wu, co-creator of Google Contact Center AI.Backed by prominent investors including Andreessen Horowitz and Greylock Partners, we proudly serve leading brands like Intuit and Hilton, earning recognition from industry giants like Forbes and Bain Consulting as a top-tier AI firm.Join us on this exhilarating journey to redefine the future of work in contact centers with AI at the forefront!

Role overview AECOM is seeking a Principal Process Engineer based in Bucharest. This senior position centers on leading complex engineering projects and supporting teams as they address technical challenges. Collaboration with colleagues from various disciplines is essential to deliver effective process engineering results across multiple industries. What you will do Lead and manage process engineering projects from initial concept through to completion Collaborate with multidisciplinary teams to develop and implement engineering solutions Ensure all project deliverables align with industry standards and internal quality requirements Offer technical guidance and mentorship to less experienced engineers Impact This role plays a key part in upholding AECOM’s standards for high-quality engineering and compliance. The Principal Process Engineer’s expertise directly shapes project outcomes and reinforces the company’s reputation for technical excellence.

Join AECOM as a Principal Engineer - Structures Team Lead, where you will lead and mentor a team of structural engineers to deliver innovative and sustainable engineering solutions. In this pivotal role, you will be responsible for overseeing design projects, ensuring compliance with regulations, and collaborating with other disciplines to drive project success.

Join our dynamic esports team at Ubisoft Entertainment as a Backend Developer. We are seeking an innovative and skilled individual who is passionate about gaming and technology. In this role, you will work closely with cross-functional teams to design and implement robust backend systems that enhance player experiences in our leading esports titles.

Location: Remote - +/- 3 hours from CET (EST / Europe preferred)Employment Type: Full-timeCompensation: $90,000 - $150,000We are excited to announce a unique opportunity for a Senior Backend Engineer to join our client, a leader in the rapidly evolving Web3 and DeFi landscape. As part of the core Platform team, you will contribute to the development and enhancement of distributed backend systems that drive innovative products and customer solutions.The ideal candidate is a passionate engineer with a strong sense of ownership and a commitment to high-quality code. You will design and manage complex systems, oversee Web3 infrastructure, and work in tandem with product and platform engineers to create reliable and scalable solutions. Our client encourages a culture of building robust systems and progressing swiftly without sacrificing quality, utilizing cutting-edge tools—including AI—to enhance productivity.Key Responsibilities:System Architecture: Design, construct, and sustain scalable distributed backend systems that underpin core platform and product functionalities.End-to-End Ownership: Oversee backend services from inception through implementation, monitoring, and long-term sustainability.Product Collaboration: Collaborate with product and engineering teams to influence product direction and strategy beyond mere technical execution.Web3 Integration: Develop and refine platform backend components, including protocol integrations, support for emerging blockchain networks, and dependable interactions with smart contracts.Engineering Standards: Uphold high standards of code quality, performance, security, and observability across all services.Operational Excellence: Thrive in a dynamic startup environment, balancing development speed with technical integrity.Innovation: Utilize AI-powered tools to enhance development efficiency and personal productivity while engaging in technical discussions, reviews, and mentorship.

Life at UiPathAt UiPath, we harness the transformative potential of automation to revolutionize the way the world functions. Our dedication to delivering top-tier enterprise software empowers organizations to realize this potential.We thrive on curiosity, self-motivation, generosity, and authenticity. We seek individuals who are passionate about contributing to a dynamic, fast-paced growth company and who care deeply about their colleagues, UiPath, and our broader mission.Could you be the one?Your MissionIn the role of Principal Data Engineer, you will be instrumental in shaping and advancing our cutting-edge data platform. This senior individual contributor position carries significant strategic impact, architectural ownership, and expectations for leadership and initiative. Our data ecosystem leverages Microsoft Fabric, and we seek someone who can champion best practices, scalability, and sustainable platform evolution. While prior Fabric experience is a plus, extensive experience with similar modern cloud data platforms is essential. This position transcends mere implementation; it demands an innovator who challenges norms, steers technical direction, and elevates the engineering standards across the team.Your Responsibilities at UiPathLead and enhance the architecture of our modern data platform, specifically within a Fabric-based lakehouse environment.Spearhead complex, cross-functional data initiatives from conception to completion with minimal supervision.Set and uphold engineering standards, modeling best practices, and performance optimization strategies.Design and refine scalable ELT pipelines and dimensional data models.Ensure platform reliability, governance, and a balance of cost-performance.Assess and integrate new tools and architectural enhancements.Serve as a technical leader and mentor within the data organization.Collaborate with Finance, Sales, and other stakeholders to translate business strategy into scalable data solutions.What You Bring to the TeamCore Requirements:-7+ years of experience in data engineering or data platform roles.- Expert SQL proficiency (required) — advanced transformations, optimization, scalable modeling.-Solid working knowledge of Python and/or PySpark.- Proven ability to design and manage modern data solutions.

Join Logifuture as a Backend QA Tech Lead, where you will spearhead quality assurance initiatives across various business units. Your primary responsibility will be to set the standards and methodologies for automated testing, ensuring their effective implementation through collaboration and mentorship. You will play a crucial role in delivering high-quality software consistently within a web microservices environment, promoting alignment and best practices across the organization. Key ResponsibilitiesDefine and advocate for best practices in the design, implementation, and maintenance of thorough automated tests.Collaborate with teams across different business units to streamline testing processes and methodologies, enhancing the quality of software products.Lead the development of automated testing frameworks to cover functional, regression, performance, and load testing, ensuring their widespread adoption for a stable and scalable application ecosystem.Oversee the testing infrastructure to facilitate automated testing, ensuring visibility, quick feedback, and the use of industry-standard tools and frameworks through cross-unit teamwork.Engage with development teams and stakeholders to grasp product requirements, design holistic test strategies, and provide expert advice on quality standards and best practices.Coordinate the deployment of test strategies across business units, including creating test plans, leading exploratory testing, and establishing standardized metrics for effective evaluation.Compile and analyze test results from various sources into detailed reports and dashboards, communicating insights to development teams and stakeholders to support informed decision-making.Monitor and evaluate aggregated test results across business units, identify improvement opportunities, and collaborate with relevant teams to resolve issues and enhance overall test coverage.Provide mentoring and guidance to team members organization-wide, cultivating a culture of continuous learning, knowledge sharing, and professional growth in automated quality assurance.

Join Our Innovative Team!WA.Technology is a leading B2B provider of comprehensive iGaming solutions, rapidly expanding our reach in emerging markets. Our cutting-edge iGaming platform offers turnkey solutions and standalone products that enable operators to seamlessly penetrate and thrive in growing markets.Our WA Platform is designed for scalability and customization, boasting over 75 game providers, more than 15,000 games, and supporting over 80 payment methods across various currencies. We empower operators to craft their unique Casino, Sportsbook, Lottery, and Fantasy businesses, ensuring they align with their vision. With offices across Europe and Latin America, we deliver localized support and expert insights to our clients.Our Work EnvironmentOur teams are strategically located in Malta, Lisbon, Sofia, London, and Bucharest. We embrace a hybrid work model that fosters in-person collaboration while providing the flexibility to work remotely as needed.Your Key ResponsibilitiesWe are seeking a Mid-Level Backend Developer (Java) to enhance the design, development, and maintenance of integrations connecting our platform with external systems. Your primary focus will be on ensuring all integrations are high-performing, stable, and fully compliant with our internal standards. You will design and implement robust backend components that facilitate seamless data flow, system interoperability, and long-term scalability, playing a crucial role in strengthening our platform's technical foundation.What We Expect From YouCollaborate with product owners, designers, and fellow developers to comprehend project requirements and translate them into technical specifications.Design and develop high-quality, scalable, and maintainable Java applications.Commit to writing clean, efficient, and well-documented code adhering to industry best practices.Conduct unit testing and debugging to ensure software reliability and performance.Continuously identify improvement opportunities and implement solutions to enhance software functionality and performance.Stay informed about the latest trends and technologies in backend development.

Join our dynamic team at Sigma Software as a Middle Embedded Software Engineer! In this role, you will be responsible for designing, developing, and implementing innovative embedded software solutions. Collaborate with cross-functional teams to deliver high-quality products that meet our customers' needs. You will have the opportunity to work on exciting projects and enhance your skills in a supportive environment.

Suvoda is seeking a Software Test Engineer based in Bucharest, Romania. This position plays a key role in supporting the development and validation of software used in clinical trials, with applications in oncology, central nervous system disorders, and rare diseases. Suvoda creates technology that helps clinical trial sponsors and site professionals manage complex, time-sensitive patient interactions. The team values close collaboration with clients and end-users, and decisions often require a strong understanding of the clinical trial landscape, regulatory requirements, and the specific features of Suvoda’s software to protect data quality. Responsibilities Test clinical trial software to confirm it functions as intended, focusing on patient safety and data integrity. Review project requirements for clarity, testability, and alignment with clinical trial protocols. Follow company processes and ensure all deliverables meet Suvoda’s standards. Design validation strategies using a risk-based approach. Prepare and manage validation documentation for assigned projects. Create and execute detailed test scripts. Document software defects and track their resolution through completion. Contribute to other assigned tasks as needed. Lead Project Tester Duties Coordinate and oversee testing activities for new study builds or modifications. Monitor daily work of the software testing team on the project. Act as the main contact for all testing-related questions on the project. Ensure timely delivery of new study builds with a focus on quality and risk management. Requirements Strong technical background. Excellent communication skills. Proactive problem-solving approach. Experience in software testing preferred. Knowledge of the clinical trial industry is a plus.

About the RoleAt Onapsis, we recognize the paramount importance of securing business-critical applications, which have often been overlooked. Our mission is to provide comprehensive cybersecurity solutions that safeguard these applications whether they are deployed on-premises, in the cloud, or in hybrid environments. Serving approximately 30% of the Forbes Global 100, we empower organizations to understand and mitigate threats within their SAP and Oracle landscapes.Your Responsibilities:As a Senior Software Engineer, you will collaborate closely with leadership, product management, and our dedicated research team. Your role will involve assessing, designing, proposing, and implementing features that address business needs, thereby enhancing our customers' security posture. You will work alongside a talented team of cybersecurity researchers and engineers to refine product definitions and drive realization. Additionally, you will partner with the Architecture team to elevate our platform's maturity in technology and architectural design, while advancing our quality engineering processes to ensure the delivery of high-quality products and services. You will also liaise closely with security and IT professionals to uphold secure systems architectures.

Join our dynamic team at dev2 as a Java Software Engineer I, where you will contribute to exciting projects and enhance your skills in a collaborative environment. As a key member of our development team, you will work on innovative software solutions that drive our business forward.

About Speechify Speechify changes how people access information. The platform turns online articles, cloud documents, and books into audio, letting users listen wherever and whenever they prefer. Tools within Speechify help listeners learn efficiently and at their own speed. As the top service in its field, Speechify continues to grow quickly. Role Overview The Senior Software Engineer, Core Experiences, joins a team responsible for the core services and SDKs that power Speechify across multiple platforms. This role sits at the crossroads of product development and infrastructure, focusing on building reliable APIs and systems that improve the user experience. The position is based in Bucharest, Romania. What You Will Do Work closely with Speechify’s Product Teams to define project scopes, improve workflows for faster feedback, and manage integration and UX trade-offs across teams. Deliver new features and solutions through the cross-platform SDK. Improve current features for better performance, including faster load times and smarter content parsing, by refining abstractions and algorithms. Deploy cloud functions, lightweight backend services, and tasks using Kotlin. Who We’re Looking For Thinks in systems and values simplicity and end-to-end design. Quick to generate ideas and options, with good judgment on when to move fast and when to take more time. Stays focused and effective in a high-growth startup and remote team setting, balancing collaboration with deep work. Works well with others and communicates clearly with designers, marketers, and product managers.

Cresta is on a mission to transform customer interactions into a strategic advantage by harnessing the full potential of contact centers. Our cutting-edge platform integrates advanced AI with human expertise, enabling contact centers to uncover customer insights, streamline conversations, automate inefficient processes, and empower team members to enhance productivity. Founded by Sebastian Thrun, a visionary behind Google X and Waymo, our leadership team includes industry pioneers like Ping Wu and Tim Shi, who have extensive experience with Google Contact Center AI and OpenAI. We have built a distinguished team of AI and ML specialists, market leaders, and esteemed investors such as Andreessen Horowitz and Sequoia. Our impressive clientele includes notable brands like Intuit, Cox Communications, Hilton, and Carmax, and we have been recognized by Forbes as one of the leading private AI companies worldwide. Join us as we embark on an exciting journey to revolutionize the workforce with AI. The future of work is here, and it’s at Cresta.Cresta is thrilled to announce the expansion of our operations to Romania, establishing a tech hub in the region. As an early joiner, you will be instrumental in forming our engineering team in Romania, helping shape the future of our local operations. We offer a remote-first work environment, allowing collaboration with a diverse global team spanning Europe, the US, and Canada. Our long-term vision includes creating a co-working space in Romania, transitioning towards a hybrid work model.

Join our team at AECOM as a Principal GIS Specialist, where your expertise in Geographic Information Systems will play a pivotal role in shaping our projects. You will lead innovative GIS initiatives, providing strategic insights and solutions that drive efficiency and effectiveness in urban planning, environmental management, and infrastructure development.In this key position, you will work closely with multidisciplinary teams, ensuring the integration of GIS technologies into project workflows. You will be responsible for developing and implementing GIS strategies, conducting spatial analysis, and producing high-quality maps and visualizations that facilitate data-driven decision-making.

Speechify is looking for a Software Engineer in Bucharest, Romania, to focus on Data Infrastructure and Acquisition. This position involves designing and building data systems that help drive product and service development. Role overview Collaboration is central to this role. Work with teams across the company to improve how data is collected, organized, and made available for analysis. The goal is to ensure data supports better decision-making throughout the organization. What you will do Design and implement data infrastructure to support Speechify’s products and services Partner with other teams to enhance data gathering and management processes Help ensure data is accessible and useful for business and technical decisions