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Senior Backend Engineer (Remote)
VengaPortugal, PortugalHá +30 dias
Descrição do cargo4+ years of backend development experience in Java and expertise in the Spring ecosystem. Bonus if you have 2+ years integrating blockchain systems in production. Proven track record building microservices architectures in production, including service discovery, circuit breakers, and distributed tracing. Strong experience with Apache Kafka (event sourcing, stream processing) and PostgreSQL (performance tuning, replication, partitioning). Hands-on knowledge of Kubernetes and AWS . Expertise in designing RESTful APIs and real-time systems using WebSocket or similar protocols. Familiarity with fintech or blockchain integrations is a strong plus. Experience in regulated industries (e.g., banking, crypto compliance) and tools like Vault, HashiCorp, or AWS KMS is a bonus. Collaborative mindset : Thrive in cross-functional teams and align technical decisions with business goals. Fluent English and Russian , with excellent communication skills for cross-functional teamwork. Passion for solving challenges in financial systems, scalability, and bridging Web3 with traditional finance. Hands-on blockchain experience (smart contracts, protocols, etc.). FinTech experience. Familiarity with compliance, AML and regulation. ISO / IEC 27001 experience. Full-Time Employment Contract . Own your time company culture - manage start and finish work times within each day. A brand new MacBook or similar option of your choice. 25 vacation days (more than the Spanish norm). Exciting work in a dynamic, international, and hyper-growth startup. Unless you live in Barcelona, you will be full-remote , but you must be within a maximum time zone difference of 3 hours from Barcelona. A sunny office in Barcelona, less than 50 meters away from the beach!
🚀 Venga : bridging innovative blockchain technologies to traditional finance
Venga is an app with a mission to take innovative blockchain technologies and bridge them to traditional finance inside a powerful centralized app, empowering people to effortlessly discover, invest, and navigate the world of Web3.
🔎 Who We're Looking For
We’re seeking a Senior Backend Engineer with expertise in Java / Spring ecosystems to architect the systems powering Venga’s financial infrastructure. You’ll design scalable microservices, build secure bridges between Web2 and Web3 technologies, and collaborate with cross-functional teams to deliver robust solutions for both traditional finance and blockchain use cases. If you’re passionate about high-performance backend systems, join us in redefining finance.
💻 What You'll Be Doing
- Design and develop Java / Spring microservices to handle traditional finance workflows (payments, compliance).
- Integrate blockchain networks (Ethereum, Solana, etc.) into Venga’s backend, interacting with nodes, indexers, and smart contracts.
- Architect event-driven solutions with Apache Kafka to process real-time transactions, blockchain events, and user activity streams.
- Build and optimize RESTful APIs and WebSocket interfaces to power our customer-facing app, backoffice tools, and third-party integrations.
- Secure sensitive data using AWS KMS, HashiCorp Vault, or MPC solutions, aligning with financial compliance standards.
- Collaborate in a cross-functional squad to deliver end-to-end features, from ideation to deployment.
- Manage PostgreSQL databases, optimizing performance, security, and replication strategies for high-volume financial data.
- Deploy and scale services on AWS using Kubernetes (k8s), ensuring efficient resource utilization and cost management.
- Implement robust security practices for financial systems , including encryption, authentication, and compliance with regulatory standards.
- Mentor junior engineers, lead code reviews, and champion best practices in testing, CI / CD, and observability.
- Stay ahead of industry trends, exploring innovations in blockchain integration, cloud-native architectures, and fintech-specific tooling.
👤 Who You Are & What You'll Need
👤 Nice to have
🌍 What we offer
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Backend Engineer • Portugal, Portugal
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