Freelance Backend Engineer
Location
Hungary
Posted
43 days ago
Salary
120K - 160K / day
Seniority
Mid Level
Job Description
Freelance Backend Engineer
Beyond Sports
Senior Software Engineer – Java (Contractor) Rate: 120,000 to 160,000 HUF Per Day Duration: 3 Months Plus Start Date: ASAP As a Senior Software Engineer (Java) – Contractor at Pulselive, you’ll be focused on delivering robust, high-performance backend services and APIs that power digital experiences for millions of sports fans globally. This role is ideal for an experienced, hands-on engineer with strong Java and Spring expertise who thrives in a collaborative and fast-paced delivery environment. You’ll work closely with cross-functional teams to build, integrate, and optimize systems that handle real-time sports data, video, and live commentary. This position is project- and delivery-focused, with no line management or people-leadership responsibilities required. Key Responsibilities: - Design and develop scalable backend systems using Java and Spring Boot - Deliver well-structured, maintainable, and testable code aligned with project requirements - Build and maintain RESTful APIs to support web and mobile applications - Integrate with third-party data providers (e.g. sports data, video, commentary) - Use Git to manage code versioning and contribute to shared repositories - Manage deployments across multiple environments (Dev, Test, Staging, Prod) - Ensure systems are performant, secure, and resilient - Identify and manage project-level technical dependencies - Participate in sprint planning and delivery-focused meetings with the wider team - Write and maintain clear technical documentation - Contribute to code reviews and uphold development best practices Core Skills & Experience: Expert-level knowledge of: - Java 11+ - Spring Boot and Spring Framework (v5+) - JPA/Hibernate and ORM principles - Designing and building microservice architectures - Creating and consuming RESTful APIs - Git for version control and collaborative development - JSON and working with structured data - Unit testing with frameworks like JUnit - Task management tools like JIRA - Writing technical documentation for APIs and backend components Proficient with: - SQL (PostgreSQL, MySQL, or similar) - Kafka or other messaging/event-driven platforms - Docker containerization - Kubernetes for orchestration - AWS services (e.g., S3, Lambda, EC2, etc.) - Maven for build and dependency management - CI/CD pipelines and deployment automation Basic understanding of: - Python (scripts, tools, integrations) - Frontend technologies: HTML, CSS, JavaScript (for context when integrating with frontend)
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Our collaborative team is dedicated to building world-class solutions, and you’ll have the opportunity to partner with other departments to drive success. While the specific team you'll be working with will be decided later, our hiring process remains streamlined and consistent across all roles. This allows us to evaluate your skills and potential, ensuring a great fit for the team you eventually join. No matter which domain you land in, you will be part of a dynamic, collaborative environment where you'll tackle complex challenges, build reusable components, and contribute to shaping the future of our product. 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Senior Backend Engineer
PleoSmart company cards. Automated expense reports. Out-of-pocket expenses. One solution for all your company spending.
Messy spend management is tricky business. And tedious processes are a lose-lose situation for all involved, not just finance. At Pleo, we're changing that. We build spend solutions that make managing money seamless, empowering, and surprisingly effective for finance teams and employees alike - with a vision to help all businesses ‘go beyond’. The word ‘Pleo’ actually means ‘more than you’d expect’, and living by that mantra has been the secret to our success over the last 10 years. Now, we’re at a pivotal moment in our journey; every move we make has a direct impact on our 40,000+ customers, our business, and our collective success. We need people who take pride in uncovering customer needs, who turn complex problems into simple solutions, challenge the way things are done (respectfully), and always aim high. With great ambitions driving us forward, we can’t say we’ve got this whole thing figured out. And frankly, that’s half the fun! What we can say is that we’re a driven, progressive, and, importantly, a kind bunch of 850+ people from over 100 nationalities, all committed to delivering the future of business spending, together. About the role We're looking for a Senior Backend Engineer to join our team at Pleo. In this role, you'll help build and scale our backend systems and be part of exciting projects as we continue to grow our product and service offerings. If you're passionate about solving complex technical challenges and want to work in a culture that values transparency, collaboration, and a deep commitment to innovation then this role is for you. What you’ll be doing As a Senior Backend Engineer, you will: - Lead initiatives to design, build, and maintain scalable microservices primarily using Kotlin. - Collaborate with cross-functional teams to develop innovative solutions across Platform, Services, SMB, and other domains. - Analyze system performance and implement optimizations to ensure high reliability and scalability. - Participate in code reviews, post-mortems, and provide mentorship to other engineers. - Proactively address technical debt and guide the team through technical challenges and migrations. What you bring You'll thrive in this role if you have: - Expertise in server-side languages, especially Kotlin, and experience with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes). - Proficiency with relational databases like PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana. - Strong problem-solving skills and a collaborative mindset to mentor and upskill your teammates. - A proven ability to lead large projects, manage ambiguity, and maintain high standards for code quality and reliability. - A passion for innovation and driving impactful solutions within a fast-paced scale-up environment. Who you’ll be working with and reporting to You’ll report to our Engineering Manager and work closely with cross-functional product teams, including Credit , Platform, Partnerships, SMB and more. Our collaborative team is dedicated to building world-class solutions, and you’ll have the opportunity to partner with other departments to drive success. While the specific team you'll be working with will be decided later, our hiring process remains streamlined and consistent across all roles. This allows us to evaluate your skills and potential, ensuring a great fit for the team you eventually join. No matter which domain you land in, you will be part of a dynamic, collaborative environment where you'll tackle complex challenges, build reusable components, and contribute to shaping the future of our product. How you’ll develop in this role In your first six months at Pleo, you’ll: - Lead backend initiatives to improve system performance and scalability.Collaborate with teams to drive innovation in product and infrastructure.Grow your expertise in Kotlin and distributed systems while mentoring other engineers.Contribute to shaping the future of our product as Pleo scales globally. - We’re committed to supporting your growth, whether through taking on larger projects, stepping into leadership roles, or expanding your technical expertise. Check out our Engineering Hiring Blog Post to get an in-depth overview of our hiring process and what to expect. Enjoy the reading! Show me the benefits! - Your own Pleo card (no more out-of-pocket spending!) - Lunch is on us for your work days - enjoy catered meals or receive a lunch allowance based on your local office 🍜 - Comprehensive private healthcare - depending on your location, coverage options include Vitality, Alan or Médis - We offer 25 days of holiday + your public holidays - For our Team, we offer both hybrid and fully remote working options - Option to purchase 5 additional days of holiday through a salary sacrifice - We use MyndUp to give our employees access to free mental health and well-being support with great success so far ❤️🩹 - Paid parental leave - we want to make sure that we're supportive of families and help you feel that you don't have to compromise your family due to work 👶 About your application English first. Since it's our company language, please submit your application in English. You’ll be using it a lot if you join us. A fair look for everyone. Our talent team reads every single application to ensure the process is fair. To keep things running smoothly, we only accept applications through our system—our support team can’t pass on calls or emails. Diversity drives us. We can only reach our goals if our team reflects the world around us. That starts with you hitting apply, even if you don't tick every single box. We encourage people from all backgrounds and experiences to join us. Interview at your best. We want you to feel comfortable throughout the process. If you have any accessibility requirements or need a specific format, email belonging@pleo.io. We’ll design a process that works for you. Your data is safe. When you apply, we process your personal data as a data processor. For more information on how Pleo processes personal data, read our Privacy Policy here. Applying for multiple roles? Nothing is stopping you, and we assess every role independently. However, we do look for alignment, so make sure you can explain why your interest and experience are right for each specific role. Reapplying. If you’re applying for the same role again, please wait six months from your last decision before hitting submit.
About Allocate Allocate is transforming private market investing by enabling RIAs and family offices to seamlessly discover, model, and manage their private market exposure. Our platform combines curated fund and co-investment opportunities with institutional-grade infrastructure. Through a single, data-rich digital experience, clients access top-tier opportunities across venture capital, private equity, private credit, and other private asset classes—backed by powerful tracking, analytics, and administration tools. About the Role Allocate is looking to add a new Senior Software Engineer II - Backend to the team! There’s a lot for us to build, and we need a developer with a broad skillset who can jump right in to help us lay the technical foundation for the company’s future. Essential Responsibilities and Duties - Design & implement new features and endpoints in backend APIs - Design & implement schema changes to support these new features - Participate in an Agile-based development environment - Work as part of an independent, cross-functional squad to deliver critical features for our platform - Build high-quality, scalable, and testable code that will help drive engineering maturity and efficiency Must Have Experience - 5+ years of object-oriented software engineering experience (C#, Java, etc) - 5+ years of experience with SQL-based databases (Postgres ideally) - Must understand how to design a schema that will result in a performant application (for example: when to add an index, and to which fields) - 3+ years C# experience - 2+ years experience developing REST APIs - Proficiency with Git and version control systems in general - Hands-on experience with AI-assisted development tools such as Claude Code, OpenAI’s Codex, or Cursor, and a demonstrated ability to continuously evaluate and incorporate new tools into your workflow as they emerge Nice to Haves - ASP.NET Web API development experience - Familiarity with basic ORM concepts (such as Dapper, Entity Framework, etc) - Familiarity with FluentMigrator - Docker and Docker Compose experience - AWS ECS/EKS experience Education - Bachelor’s degree in Computer Science, similar technical field of study, or equivalent practical experience Essential Values & Culture - Providing our clients with a world-class experience is our number one priority. We obsessively search for ways to improve the experience for our clients and partners. This requires extraordinary response times, proactivity, and ensuring that everything we do, from product strategy to offline communications is a top-tier client experience. - Challenge convention: Instead of detailing all the reasons why an idea may not work, we constantly question things to determine how a viable idea may be put into motion. - Commitment to continuous improvement: We find ways to personally scale each day by pushing ourselves up the learning curve. - Meritocracy, not politics: We place the utmost value on results and rewards through merit, not reward actions driven by political agendas or behavior. - Civil Discourse is embraced: We believe open, intellectually curious conversations are required to consistently arrive at the best decisions. Respect is paramount in our dealings with one another, but our mission is always to get the right answer collectively, not to be right. - Embrace technological change: We adopt tools and techniques that make us faster, smarter, and better. We stay open to innovation, especially around AI and automation, and drop outdated methods without hesitation. This includes actively integrating AI-assisted development tools into your daily workflow and staying current as the landscape evolves. Complacency kills progress, we value adaptability and curiosity. Additional Details: - Fully Remote Position - Travel required for offsites - An in-person interview may be required during the interview process - A Broadband internet connection required - Seniority: Mid-level - Location: All I-9 eligible candidates will be considered - Salary: $145-175K base, competitive early-stage fintech startup package (salary + bonus + equity) - Benefits: Medical, dental, and vision. 401(k), and responsible vacation time (PTO) - Employment: Full-time - Compliance with Allocate's Code of Ethics is a given for this role. The base pay offered will be determined based on the candidate's experience, location, skills, training, certifications, education, internal equity, and market data. Total compensation may also include a discretionary performance-based bonus. We do not anticipate that candidates hired will begin at the top of the range, though this may occur on a case-by-case basis.

