Senior Backend Engineer (Remote) Portalegre

Senior Backend Engineer (Remote)
Portalegre
Portalegre, Portalegre District, Portugal

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
- functional teams to deliver robust solutions for both traditional finance and blockchain use cases. If you’re passionate about
- 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
  - driven solutions with Apache Kafka to process
  - time transactions, blockchain events, and user activity streams.
• Build and optimize RESTful APIs and Web
  Socket interfaces to power our
  - facing app, backoffice tools, and
  - party integrations.
• Secure sensitive data using AWS KMS, Hashi
  Corp Vault, or MPC solutions, aligning with financial compliance standards.
• Collaborate in a
  - functional squad to deliver
  -
  - end features, from ideation to deployment.
• Manage Postgre
  SQL databases, optimizing performance, security, and replication strategies for
  - 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,
  - native architectures, and
  - specific tooling.

Who You Are & What You'll Need

• 4+ 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 Postgre
  SQL (performance tuning, replication, partitioning).
• Hands-on knowledge of Kubernetes and AWS.
• Expertise in designing RESTful APIs and
  - time systems using Web
  Socket 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, Hashi
  Corp, or AWS KMS is a bonus.
• Collaborative mindset: Thrive in
  - functional teams and align technical decisions with business goals.
• Fluent English and Russian, with excellent communication skills for
  - functional teamwork.
• Passion for solving challenges in financial systems, scalability, and bridging Web3 with traditional finance.

Nice to have

• Hands-on blockchain experience (smart contracts, protocols, etc. ).
• Fin
  Tech experience.
• Familiarity with compliance, AML and regulation.
• ISO/IEC 27001 experience.

What we offer

• Full-Time Employment Contract.
• Own your time company culture - manage start and finish work times within each day.
• A brand new Mac
  Book or similar option of your choice.
• 25 vacation days (more than the Spanish norm).
• Exciting work in a dynamic, international, and
  - growth startup.
• Unless you live in Barcelona, you will be
  - 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!