Mid Senior Backend Software Engineer jobs in Vilnius – Page 5 | RoboApply Jobs

Mid Senior Backend Software Engineer jobs in Vilnius· Page 5

Results 81–100 of 385 for “Mid Senior Backend Software Engineer” in Vilnius.

385 jobs found

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Nord Security logo
Full-time|On-site|Vilnius

Join the forefront of privacy and security technology.Are you a passionate problem-solver looking to make an impact? Become a vital part of our team at Nord Security, where we develop cutting-edge tools such as Threat Protection Pro and the NordLynx protocol, leading the way in VPN technology.Your role? Empower millions around the globe to reclaim their onli…

Apr 12, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join Saily, where we revolutionize mobile connectivity for travelers. Say goodbye to roaming fees and plastic SIM cards, and enjoy seamless, secure mobile data in over 200 destinations. With millions of paying customers and hundreds of thousands of travelers engaged on our platform at any moment, we are committed to providing an effortless experience.Our AI-native Product Engineering culture is designed to empower our team:The Engineer is the architect, owning challenges from conception to production.AI Agents enhance productivity by handling repetitive tasks, allowing Engineers to focus on impactful work.Your suggestions for improvement are valued and implemented to enhance our effectiveness.We prioritize curiosity, learning, and sharing knowledge among our team.Our guiding principle is to ensure the customer enjoys a comfortable and hassle-free journey.At Saily, we prioritize growth over comfort, contribution over hierarchy, and impact over process. We provide our talented team with the context, autonomy, and AI tools to excel in their work.

Apr 12, 2026
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Teltonika logo
Full-time|On-site|Vilnius, Vilnius City Municipality, Lithuania

Are you ready to take your embedded Linux development skills to the next level? Join our dynamic team at Teltonika in Vilnius or Kaunas, Lithuania, where you'll have the opportunity to work with cutting-edge networking solutions that are transforming industries worldwide. This is your chance to enhance your expertise while contributing to impactful projects.At Teltonika, our Networking Solutions Business Unit is dedicated to creating and manufacturing high-quality industrial and enterprise connectivity equipment, including routers, switches, gateways, and modems. Our devices are utilized in the most challenging sectors such as Industry 4.0, Smart City initiatives, and Green Energy solutions.As a Mid/Senior Embedded Linux Software Engineer, your responsibilities will include:Developing innovative software for IoT devices.Tackling complex technical challenges.Analyzing and implementing new technologies.Collaborating with hardware components.Contributing as a key player in a collaborative team environment.Providing essential technical support to colleagues.To succeed in this role, we expect you to have:At least 2 years of experience in software development for embedded devices, preferably Linux-based.2+ years of proficiency in C programming.2+ years of experience with Linux OS (Buildroot/Yocto).A strong track record of solving complex software and hardware issues.A solid understanding of operating system principles.Knowledge of computer networking fundamentals.Ideally, you will also possess:Experience with various embedded processors (SoCs/microcontrollers).Familiarity with electronics and lab equipment (oscilloscope, logic analyzer, etc.).Experience in shell programming.Knowledge of communication protocols such as UART, SPI, I2C, USB.Experience with wireless technologies like WiFi and Bluetooth.Experience developing Linux drivers and bootloaders.Experience with the OpenWRT operating system.Awareness of cybersecurity principles.Good command of the English language.We offer you:A vibrant work environment with opportunities for professional growth in a rapidly expanding company.Engaging and challenging projects focused on industrial networking devices.A culture that promotes collaboration and a dynamic work atmosphere.Flexible work schedules and comprehensive health insurance to support your well-being.Company-sponsored sports activities (basketball, football, volleyball, yoga) and other events.Celebrations for achievements, team-building activities, summer festivals, and special occasions.An attractive bonus structure for participation in our employee recommendation program.Birthday and Christmas gifts, along with rewards for work anniversaries.Office snacks to keep you energized!

Jan 30, 2026
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Oxylabs logo
Full-time|On-site|Vilnius

Location: Vilnius Role: Mid-Senior PHP/Go Developer About Oxylabs Oxylabs brings together more than 500 professionals focused on building proxy and web data scraping solutions used by many of the world’s top companies, including several Fortune 500 organizations. What You'll Do Work on complex technical challenges and support an infrastructure that moves over 60PB of data traffic each month. The scale is significant: 6PB+ of Ceph storage 60PB+ monthly data traffic 300,000+ service requests per second 500,000+ Kafka messages streamed per second Contribute to a product with more than 15 million users worldwide. New features and improvements go live quickly, so your work has visible impact from the start. The team maintains a rapid development cycle with continuous delivery. Tech Stack and Environment Work with the latest PHP frameworks and databases in a fully containerized setup. Kubernetes has been in production here for over seven years. Expect to tackle big data projects daily, use Go in real-world scenarios, and help shape engineering standards and best practices.

Apr 20, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Role overview This Mid-Level Office Manager position at Nord Security focuses on keeping daily operations efficient and organized in the Vilnius office. The role blends resource management, administrative support, and practical help for team members to create a productive work environment. What you will do Manage office resources and keep supplies stocked Coordinate administrative tasks and manage schedules Assist staff with daily needs and requests Contribute to a positive company culture through daily interactions Identify opportunities to make office operations more efficient Location The position is based onsite in Vilnius.

Apr 27, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join the forefront of online privacy and security.Are you an inquisitive problem-solver who enjoys charting their own course? Become a vital member of the team responsible for Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally. These innovative tools empower individuals with enhanced privacy, security, and control over their online experience.Your Contribution: Play a crucial role in enabling millions to regain control over their online safety, privacy, and personal data.Key ResponsibilitiesConduct thorough manual testing and assist in the development of test plans and cases within the Apple ecosystem.Identify and report software defects while collaborating with development teams for swift issue resolution.Work closely with the Product & Engineering Manager, developers, and fellow QA team members to ensure the delivery of high-quality products.Assist in defining testing strategies and lead their implementation.Essential QualificationsMinimum of 3 years of experience in manual testing (experience with applications is preferred but not mandatory).A genuine interest in both manual and automation testing methodologies.Proficient in collaboration tools such as Jira and Confluence.Experience working in cross-functional teams.Familiarity with software QA methodologies, tools, and best practices.Knowledge of Agile practices.Meticulous attention to detail.Strong verbal and written English communication skills.Preferred QualificationsISTQB foundation certification is a significant plus but not a requirement.Tools You Will UtilizeJira X-rayConfluenceApple XCTestCharlesWireshark

Apr 12, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join Nord Security as a Senior Software Engineer, where we are dedicated to building a secure cyber future.At Nord Security, we empower individuals and organizations to reclaim their online security, privacy, and data. Our innovative solutions, ranging from VPNs to password managers, threat intelligence, and eSIMs for seamless travel, are trusted by millions around the globe. In this key role, you will contribute to our mission of making the online experience safer for everyone.Life is increasingly online. In this position, you’ll be at the forefront of helping users take ownership of their digital lives.

Apr 10, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join Saily, where we’re revolutionizing connectivity for travelers by eliminating roaming fees and plastic SIM cards, offering swift, secure mobile data in over 200 destinations worldwide. With millions of satisfied customers and countless travelers accessing our services daily, we are dedicated to enhancing their travel experiences.At Saily, we nurture an AI-driven Product Engineering culture that empowers our engineers to:- Take charge of infrastructure challenges from conception to deployment.- Collaborate with AI agents that handle repetitive tasks and code, allowing engineers to focus on impactful solutions.- Propose improvements that enhance efficiency, while implementing the changes collaboratively.- Foster a culture of learning and curiosity, ensuring that customer satisfaction remains our top priority.We prioritize growth over complacency, contributions over hierarchy, and meaningful impact over rigid processes. At Saily, we trust our talented individuals with the context, autonomy, and AI tools necessary to excel in their roles.

Apr 12, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join Nord Security in our mission to create a safer cyber future.We empower individuals and businesses to reclaim their online security, privacy, and data. Our innovative solutions, ranging from VPNs and password managers to threat intelligence and travel eSIMs, are trusted by millions around the globe.In this pivotal role, you will play a crucial part in helping users take control of their digital lives.Main Responsibilities:Design and enhance a robust User Control Panel that fosters user trust, engagement, and sustainable growth.Integrate new features and user flows within the account management portal (subscriptions, billing, security).Develop and uphold a high-quality, scalable front-end codebase.Continuously refine code quality, performance, and user experience.Create and manage unit and integration tests in tandem with feature development.Adhere to and contribute to component library and design system standards.Engage in code reviews to maintain high engineering standards.Collaborate with backend engineers on API contracts and error handling.Work alongside QA engineers to ensure consistent feature behavior, including edge cases.Debug issues across the frontend stack, from UI rendering to state management.Advocate for improvements in engineering standards, tooling, and development processes.Conduct research and development to support new initiatives or technical decisions.Provide technical mentorship to team members regarding best practices.Contribute to shaping the team's technical vision and long-term objectives.

Apr 12, 2026
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Omnisend logo
Full-time|On-site|Vilnius, Lithuania

Join the Omnisend Team!If you're looking for a workplace that values intelligence and collaboration over chaos and drama, Omnisend is the perfect fit for you. We pride ourselves on a culture where data drives our decisions, allowing us to focus on delivering impactful results without the distractions of micromanagement or excessive meetings. We believe in transparency, trust, and the power of feedback, fostering a professional environment where everyone contributes to our collective success. Our mission is customer-centric, and we are dedicated to solving real-world problems that help eCommerce brands flourish.The Expansion Product Team at Omnisend is pivotal in maintaining and enhancing the core systems that facilitate our business growth. This includes managing billing, pricing/monetization, and access scopes, ensuring our merchants have a seamless experience as they log in, upgrade plans, manage subscriptions, and obtain accurate invoices. In our Growth Value Stream, we focus on experimentation and efficiency, always looking for innovative ways to influence user behavior while maintaining a robust and scalable platform.We seek a Senior Full Stack Engineer with a strong preference for backend development, who is eager to take an active role in shaping and owning engineering solutions. The ideal candidate is self-motivated, brings thoughtful insights to discussions, challenges assumptions, and actively contributes to both technical and product decisions. You will work closely with product and engineering teams to build resilient systems and deliver impactful product changes in a timely manner.

Mar 13, 2026
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Palantir Technologies Inc. logo
Forward Deployed Software Engineer

Palantir Technologies Inc.

Full-time|On-site|Vilnius, Lithuania

Join a Transformative CompanyPalantir Technologies is at the forefront of developing innovative software that empowers organizations to make data-driven decisions. Our advanced platforms enable partners to create life-saving medications, predict supply chain interruptions, locate missing persons, and much more.Position Overview As a Forward Deployed Software Engineer (FDE), you will collaborate closely with clients to swiftly identify their most pressing challenges and devise impactful solutions that leverage data. Our clients depend on Palantir’s platforms for critical operations, often starting with open-ended questions such as, "What causes our flight delays?" or "How can we improve our detection of money laundering activities?" In this role, you will utilize your analytical mindset, creativity, and technical expertise to help organizations harness their data for significant societal impact. You will gain invaluable insights and contribute to pivotal industries and institutions.As an FDE, you will operate similarly to a startup CTO: collaborating in compact teams with minimal oversight while owning the end-to-end execution of high-stakes projects. Your daily activities may include discussing system architecture with fellow engineers, managing large-scale data sets, building custom web applications, engaging with customer executives, or formulating strategies for your team.Whether your aspirations lie in entrepreneurship or engineering leadership, we believe Palantir is the ultimate environment to cultivate your skills alongside exceptional colleagues. You will learn to dissect complex problems, assess the implications of various solutions, acquire new technologies and programming languages, and even contribute to their development. You will operate independently, making decisions within a supportive community that challenges you to grow.

Jan 26, 2022
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Oxylabs logo
Full-time|On-site|Vilnius

Oxylabs creates proxy and web data scraping solutions for a diverse client base, including Fortune 500 companies. The company’s team of over 500 professionals tackles complex data challenges and supports large-scale operations. Role overview This Mid-Level PHP Developer position is based in Vilnius. The role centers on maintaining and enhancing the infrastructure that powers Oxylabs’ global data services. The systems managed in this role process significant volumes of data for clients worldwide, requiring careful attention to reliability and performance. Key systems and technologies Ceph storage handling over 6 petabytes of data Monthly data traffic exceeding 60 petabytes Service infrastructure managing more than 300,000 requests per second Kafka streaming with 500,000 messages per second This role focuses on supporting and improving the core systems that keep data flowing smoothly at scale.

Apr 21, 2026
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Surfshark logo
Full-time|On-site|Vilnius

At Surfshark, we strive to provide our users with an unparalleled experience through our product. This commitment requires vigilance in identifying and resolving any bugs that may disrupt user satisfaction. We believe that collaborative efforts from analytical and creative thinkers lead to fewer bugs and a smoother experience for everyone. Our dedicated QA team employs a diverse range of tools and technologies to combat these issues. We utilize various devices and virtual environments for comprehensive app testing, alongside an array of browsers and extensions for front-end evaluations. For functional test automation, we leverage TypeScript, and tools like Postman and Charles Proxy enable us to dive deeper into our applications. Are you ready to join us in this ongoing battle against bugs?

Mar 17, 2026
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Oxylabs logo
Full-time|On-site|Vilnius

Join our dynamic team of over 500 skilled professionals at Oxylabs, where we create innovative proxy and web data scraping solutions for some of the most recognized brands worldwide, including Fortune 500 companies.What You Can Expect:As a Mid-Level PHP Developer, you will tackle intricate challenges and manage our extensive infrastructure, which supports over 60PB of monthly data traffic. Your role will involve working with significant metrics, such as: - 6PB+ Ceph storage - 60PB+ monthly data traffic through our systems - 300k+ service requests processed per second - 500k+ Kafka messages streamed per second

Feb 23, 2026
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Nord Security logo
Full-time|On-site|Vilnius

Join the NordLayer team as we revolutionize cybersecurity for businesses worldwide.NordLayer offers a flexible, toggle-ready platform that empowers modern teams to work seamlessly, free from security concerns. Trusted by over 11,000 companies globally, our solution integrates effortlessly into any tech stack, safeguarding users wherever they are.Your Role: Play a crucial part in helping businesses maintain robust, forward-looking network security.As part of our Desktop Applications department, you'll collaborate with a dynamic team of skilled engineers to develop innovative cybersecurity networking solutions tailored for businesses. We foster a collaborative environment to tackle complex challenges with a strong focus on security.

Apr 12, 2026
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Speechify logo
Full-time|On-site|Vilnius, Lithuania

Role overview The iOS Core Product Software Engineer at Speechify works on building and enhancing iOS applications. The main goal is to make Speechify’s products more accessible and intuitive for users. This position is located in Vilnius, Lithuania. What you will do Develop and improve core features within Speechify’s iOS apps Work closely with other engineers and the product team to enhance user experience and accessibility Apply technical expertise to support and advance Speechify’s iOS technologies Location The role is based in Vilnius, Lithuania.

Apr 25, 2026
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Flo Health logo
On-site|On-site|Vilnius

Join Flo Health, the leading health and fitness app for women, as a Senior Backend Engineer. With over 500 million downloads and 80 million monthly users, we're on a mission to revolutionize female health. As part of our engineering team, you will build and enhance our backend systems, ensuring they are fast, reliable, and secure. Your work will directly impact the lives of millions of users, providing data-driven insights and privacy-first features. If you have a passion for solving complex problems and are eager to learn, we want to hear from you!

Jan 18, 2026
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scale3c logo
Full-time|On-site|Vilnius, Vilniaus, Lithuania

We are looking for a dynamic Java Software Engineer to join our passionate engineering team at scale3c. If you are driven by a desire to innovate and eager to contribute to your professional growth, we want to hear from you!

Aug 20, 2024
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nordsec logo
Full-time|On-site|Vilnius

Join Saily as a Site Reliability Engineer, where you'll play a pivotal role in maintaining and improving our systems. You will collaborate with cross-functional teams to design, implement, and manage scalable infrastructure, ensuring optimal performance and availability of our services.

Mar 16, 2026
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Nordsec logo
Full-time|On-site|Vilnius

Join the forefront of online security! Are you a passionate problem-solver seeking to make a difference? Be a part of the innovative team behind Threat Protection Pro, the cutting-edge NordLynx protocol, and the fastest VPN globally—empowering users with privacy, security, and control over their online experience.Your Contribution: Assist millions in reclaiming their online security, privacy, and data.The Low-Level Team is tasked with developing essential components for various platforms, including Windows, Linux, Android, and Apple.

Feb 25, 2026

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