Senior Java Developer

Behavox; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A technology company specializing in data solutions is looking for a Software Engineer to build and evolve their Mosaic platform. The ideal candidate will have over 5 years of experience with scalable backend systems, particularly using Java and GCP. Responsibilities include designing services, collaborating with engineers, and ensuring code quality. This role offers a competitive salary, flexible working conditions, and a chance to make a significant impact within the organization.

Benefits

Competitive cash compensation

Flexible work schedule

30 days annual time-off

Qualifications

• 5+ years experience building scalable, reliable backend systems.
• Deep interest in Behavox’s mission and products.
• Experience with containerized or serverless components.

Responsibilities

• Design and implement scalable, cloud-native services in Java.
• Collaborate with team members during planning and code reviews.
• Write and maintain automated tests to uphold product quality.

Skills

Cloud-native backend systems

Java

SQL

Distributed systems

Message brokers

Tools

Java 17+

GCP

PostgreSQL

Python

Job description

Behavox is shaping the future for how businesses harness their most important raw material - data. Our mission is bold: Organize enterprise data into actionable information that protects and promotes the business growth of multinational companies around the world.

From managing enterprise risk and compliance to maximizing revenue and value, our data operating platform presents a widespread opportunity to build multilingual, AI/ML-based solutions that activate data for every function within a global enterprise.

Our approach is unique, and it’s validated by our customers who tell us to keep forging ahead because no one else is aggregating, analyzing, and acting on data to uncover opportunities or solve problems quite the way we are.

We are looking for fearless innovators who have an insatiable appetite for building what no one has built before.

Your Role

As a Software Engineer at Behavox, you will help build and evolve our cutting-edge Mosaic platform.

You’ll join a high-performing team of engineers, working on problems across distributed systems, real-time analytics, and large-scale data ingestion pipelines. You\'ll collaborate closely with product managers and fellow engineers to deliver innovative solutions used by top-tier financial institutions worldwide.

You’ll have full ownership of features—from design to deployment—and the autonomy to make technical decisions while being supported by a team of experts. Our culture emphasizes continuous learning, code quality, and delivering business impact.

Our Technology

Our tech stack includes Java 17+, Python, GCP (Pub/Sub, DataFlow, Cloud Run, Cloud Functions), PostgreSQL, BigQuery, and a host of modern DevOps and observability tools.

We prioritize clean code, testability, and frequent refactoring to maintain a healthy development lifecycle. You\'ll always work with the latest frameworks and contribute to evolving our architecture.

Why Join Behavox?

1. Make Real Impact: Behavox combines the agility of a startup with the stability of a scale-up—your work will be visible and mission-critical.
2. Growth Stage Product: Our platform is already proven in the market, with substantial room for innovation and evolution.
3. Learn From Top Engineers: Work alongside highly experienced professionals who bring deep knowledge across data systems, finance, and cloud platforms.
4. Engineering-Driven Culture: Technical excellence is central to our product vision and execution.
5. Agile Teams: Contribute to tightly-knit, autonomous teams with a clear roadmap and fast feedback loops.

What You'll Bring

• A deep interest in Behavox’s mission and products
• 5+ years building scalable, reliable, cloud-native backend systems using Java (GCP preferred, AWS/Azure acceptable)
• Experience designing containerized or serverless components in large-scale distributed systems
• Proficiency with SQL, both OLAP and OLTP (MySQL, PostgreSQL, BigQuery, RedShift, Snowflake) and NoSQL (ScyllaDB, HBase, Cassandra, BigTable) data stores
• Familiarity with message brokers like Kafka, Google Cloud Pub/Sub, RabbitMQ

Nice to Have Proficiency with Python and a strong testing mindset (unit, integration, contract, e2e)

What You'll Do

• Design and implement scalable, cloud-native services in Java
• Collaborate with team members during planning, technical discussions, and code reviews
• Take end-to-end ownership of features and deliver with autonomy
• Analyze product requirements and propose implementation strategies
• Write and maintain automated tests at all levels (unit, integration, contract, component, E2E) to uphold high product quality

What We Offer

• A truly global mission with a passionate highly talented community in locations all over the World
• The ability to have significant impact and potential for learning as our aspirations require bold innovation
• A highly competitive cash compensation package with performance bonuses baked into salary payments
• A flexible work schedule that allows for Remote or Hybrid work as appropriate to the role and location
• A very generous time-off policy (30 days annually), with public holidays for your geography in addition

We are an equal opportunity employer. We do not discriminate on the basis of any protected status. This statement reflects our commitment to a diverse and inclusive workforce.