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Europe 4w PTO

  • Design and implement complex algorithms for cellular network optimization.
  • Develop and maintain high-performance, scalable software systems using Java and modern technologies.
  • Collaborate with cross-functional teams in an AI-native engineering environment using coding agents.

Java Spring Boot Kubernetes SQL Algorithms

20 jobs similar to Senior Backend Developer

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Europe 4w PTO

  • Design and implement complex algorithms for cellular network optimization.
  • Develop and maintain high-performance, scalable, and reliable full-stack software systems.
  • Collaborate with cross-functional teams to deliver cloud-edge solutions using modern CI/CD and AI coding tools.

5Blue Software is an Israeli-Ukrainian software development company specializing in custom software development, staff augmentation, and AI solutions. They help startups and mid-sized companies scale faster with vetted engineering talent across Europe, offering a supportive and collaborative international team environment.

US

  • Design scalable systems and validate AI-assisted code to drive technical excellence across the team.
  • Collaborate with engineers through pairing, code reviews, and knowledge sharing in weekly Friday Dev Chats.
  • Mentor junior engineers and work with product team to execute features from requirements to deployment.

Real (Nasdaq: REAX) is a publicly traded, fast-growing global real estate brokerage powered by technology and driven by people. With operations across the U.S., Canada, India, and the District of Columbia, the company pairs Tech x Humanity to reimagine the residential real estate experience.

Spain

  • Participate in development and maintenance of innovative applications using AI-assisted tools.
  • Analyze requirements, develop test cases, deploy to production, and troubleshoot incidents.
  • Apply AI-driven approaches for code generation, automated documentation, test generation, and code reviews.

Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultants in 21 countries and a turnover of €850M, they are committed to delivering impactful, future-ready solutions.

Europe

  • Design and develop scalable frameworks, libraries, and platform components for AI-powered applications.
  • Define architecture, APIs, and engineering standards for agentic AI frameworks, including orchestration and evaluation.
  • Mentor engineering teams on AI agent development and promote best practices in a collaborative remote environment.

They are a technology company that builds foundational platforms for AI innovation across multiple product teams. They foster a collaborative, forward-thinking environment with significant ownership and long-term impact.

Ukraine

  • Collaborate with development team, Product Owner, and Engineering Manager on product tasks.
  • Design and implement application architecture and ensure code quality.
  • Write efficient code using Spring, microservices, and persistence frameworks.

Kyivstar.Tech is a Ukrainian hybrid IT company and a subsidiary of Kyivstar, one of Ukraine's largest telecom operators. With over 600 specialists, we drive meaningful change through innovative tech solutions in mobile, web, and high-performance systems.

Poland

  • Drive modernization of legacy Java applications by migrating from Wildfly to Spring Boot and removing EJB/JMS components.
  • Standardize APIs using OpenAPI specifications and integrate event-driven communication via Kafka.
  • Build for the cloud with Kubernetes, automate CI/CD pipelines, and implement AI-based code review systems.

Inetum Polska is part of the global Inetum Group, driving digital transformation for businesses and public institutions with IT services. Operating in 19 countries and employing over 28,000 professionals, it fosters a diverse and inclusive work environment with a focus on employee development.

Portugal

  • Design, develop, and maintain scalable backend applications using modern Java (17/21) and the Spring ecosystem
  • Own software delivery from architecture and implementation through deployment, monitoring, and production support
  • Collaborate with cross-functional teams to build resilient cloud-native applications and influence technical architecture

Pragmatike is recruiting on behalf of a leading software engineering consultancy that partners with global organizations to design, build, and scale high-performance digital products. The company delivers modern cloud-native applications and distributed systems while fostering a collaborative, engineering-first culture.

Global

  • Implement software components according to design specifications and perform system integration and testing.
  • Perform unit testing, participate in estimating project efforts, and collaborate with stakeholders.
  • Support and optimize CI/CD processes and provide technical input into product roadmaps.

Miratech is a global IT services and consulting company that helps visionaries change the world by supporting digital transformation for large enterprises. The company retains nearly 1000 full-time professionals, operates in over 25 countries, and has a culture of Relentless Performance with a 99% project success rate.

Germany

  • Develop core execution primitives for reliable AI workflow orchestration.
  • Build integrations with large language model providers and AI agent frameworks.
  • Ensure AI workflow executions are fully observable, traceable, and easy to debug.

Jobgether is a job platform that uses AI-powered matching to connect candidates with hiring companies. It operates remotely and focuses on efficient, objective candidate evaluation.

Latin America

  • Architect core backend infrastructure using Java/Spring Boot for secure, scalable payment processing across Latin America.
  • Optimize data performance and build React-based frontend applications to ensure seamless API consumption.
  • Leverage AI tools across the development lifecycle and mentor junior engineers through code and design reviews.

Clara is the fastest-growing B2B fintech in Latin America, providing corporate cards, bill pay, financing, and a B2B platform to over 20,000 businesses. The company is backed by top global and regional investors and fosters a high-talent-density, values-driven culture focused on clarity, ownership, and inclusivity.

Unlimited PTO

  • Own and evolve cloud infrastructure and CI/CD pipelines, driving projects from inception to deployment.
  • Gain deep knowledge of the backend stack (Java Spring Boot) and optimize system reliability and scalability.
  • Actively adopt AI tools to enhance productivity, automate infrastructure provisioning, and ensure security.

Archy is a Series B vertical SaaS company that provides AI-powered software to revolutionize dental practice management. The company has a growing, collaborative team with a remote-friendly culture.

Brazil

  • Collaborate with cross-functional teams to design and implement complex backend solutions using Java Spring Boot.
  • Write maintainable, scalable code following best practices and stay up-to-date with latest frameworks.
  • Develop, test, and deploy backend solutions, providing ongoing maintenance and support documentation.

KTO is an iGaming company founded in 2018, offering online sports betting and casino entertainment with a proprietary platform. They are a rising leader in LATAM, ranked among Brazil's top 10 iGaming brands, and foster a culture of innovation, transparency, and diversity.

Global

  • Design, build, and maintain JVM-based microservices (Java/Kotlin) on AWS ECS, App Runner, and Lambda, working with PostgreSQL, DynamoDB, and event-driven integrations.
  • Take full ownership of services from design to production, making architectural decisions and proactively identifying and fixing issues before they escalate.
  • Collaborate on API design and leverage AI-assisted development tools as part of your daily workflow.

Routescanner is the world's leading container logistics intelligence platform, helping shippers and cargo owners optimize intermodal container routes based on transit times, carrier reliability, and CO₂ emissions. We're a growing, lean company with a small, high-ownership engineering team that values trust, output, and clean code.

Poland

  • Design and implement high-performance microservices in Java/Spring Boot and maintain event-driven integrations using Apache Kafka.
  • Take full ownership of features end-to-end, work directly with business stakeholders, and write clear technical documentation.
  • Mentor team members, hold the bar on code quality through reviews and CI/CD, and proactively address technical debt.

InPost Group is an innovative European out of home deliveries company, revolutionizing parcel delivery through intelligent lockers. With over 10,000 employees worldwide and a market capitalization of about $5 billion, it is one of the largest out of home delivery providers in Europe, committed to sustainable and efficient solutions.

UK

  • Design, develop, and optimize scalable shared backend services using Java and serverless technologies (AWS Lambda).
  • Design and implement RESTful APIs and event-driven systems, contributing to frontend components as needed.
  • Collaborate with cross-functional teams, mentor junior developers, and maintain CI/CD pipelines for high-quality software delivery.

Turnitin is a recognized innovator in global education, partnering with educators and institutions for over 25 years to develop learning integrity solutions. With over 16,000 academic institutions and team members in 35+ countries, the company fosters a remote-first culture focused on purpose, accountability, and well-being.

Estonia

  • Design, develop, test, and deploy features alongside a distributed collaborative team.
  • Participate in code reviews to ensure code quality and adherence to coding standards.
  • Collaborate with cross-functional teams to define, design, and ship new features.

We shape the future of communications, delivering innovative solutions to hundreds of thousands of businesses and empowering millions of developers worldwide. We foster a remote-first, inclusive culture with a diverse team making a global impact.

Romania

  • Design and deliver end-to-end AI-powered product features across backend and frontend.
  • Rapidly prototype AI agent use cases and validate new product ideas through iterative development.
  • Collaborate with product managers and engineers to translate ideas into scalable, production-ready solutions.

Our partner is a fast-growing engineering team building next-generation AI-powered workflow solutions that simplify automation at scale. They offer a remote-first, highly collaborative environment with significant ownership and autonomy.

Brazil

  • Design and develop robust, scalable microservices using Kotlin and Java.
  • Ensure code excellence through TDD, DDD, Clean Code, and Hexagonal Architecture.
  • Collaborate with the team and client, owning the full product lifecycle from conception to deployment and maintenance.

CI&T helps large companies turn AI potential into real business impact through AI deployment, AI-native execution, and tech-integrated solutions. With 30 years of experience, they have 8,000 employees across 25+ countries, fostering a collaborative and innovative culture.

Norway

  • Design, develop, and maintain cloud-native applications and microservices using Java and Spring Boot.
  • Build intuitive user interfaces with Angular and modern web technologies for a mission-critical platform.
  • Contribute to architectural decisions ensuring high availability, scalability, and disaster recovery.

Everbridge is a global leader in critical communications and enterprise safety solutions, helping governments and organizations protect communities during emergencies. The company employs over 1,500 people across the world, fostering a mission-driven culture focused on saving lives and keeping businesses running.

Poland

  • Analyze, design, and implement backend solutions for a large-scale modernization initiative.
  • Develop and maintain applications using Java and Spring Boot, including REST APIs and microservices.
  • Collaborate in an Agile team to support migration, refactoring, and CI/CD processes.

Inetum Polska drives digital transformation for businesses and public institutions through a wide range of IT services. With over 28,000 professionals globally, the company fosters a diverse and inclusive work environment and supports employee development through training and certifications.