Lead Backend Developer (Java/AWS)

Quick summary

🌎 This is a fully remote position.

🇪🇺 Looking for people in Europe or LATAM.

🇬🇧 Professional English is a must. All company and client communication is in English. Spanish is a strong bonus, as the project is a banking-grade Payroll platform for the Latin American market.

😎 6+ years of experience in backend development, with mastery of Java 17+, Spring Boot, and Event-Driven Microservices. Proven experience with AWS infrastructure.

🔮 We are looking for a hands-on technical leader to build a next-gen HR & Payroll platform. You will own the architecture and lead a team to replace legacy systems with a modern cloud-native solution.

💸 Salary: Gross (B2B) 4000€ ~ 6000€ / month.

About us

BB Agency is a partner for digital evolution, blending creativity and technology to drive meaningful growth. We collaborate with companies focused on real human needs, shaping brands, experiences, and products that impact millions daily. Founded in 2012 on Island Krk, Croatia, we've grown into a fully remote agency with a global team of 40+ members. We believe in learning by doing, open communication, and pushing boundaries to deliver our best work. Our clients range from tech SMEs to corporations and funded startups in SaaS, finance, healthcare, and more. We’ve partnered with names like AWS, Deloitte, BNP Paribas, ShipBob, Crisp, and CloudZero, among many others.

Job description

We are seeking an exceptional Lead Backend Developer to architect and build the HR & Payroll Platform. This is not a standard CRUD application; it is a high-stakes financial calculation engine handling millions in payroll transactions.

You will be the Technical Owner of the backend ecosystem. You will act as the bridge between complex business logic and modern cloud architecture. You will define the microservices boundaries, enforce strict security standards, and mentor a team of developers and AI engineers to deliver a robust v1.0 launch.

Your Responsibilities

• Architectural Ownership: Define and enforce the backend architecture using Domain-Driven Design (DDD).

• Hands-On Core Development: Write the critical logic using Java 17+ and Spring Boot. You are expected to code daily.

• AWS Infrastructure as Code: Own the cloud topology. You will provision resources (VPC, ECS Fargate, Aurora Postgres) using AWS CDK (TypeScript), ensuring performance and security.

• Security & Compliance: Implement "Banking-Grade" security. You will manage Amazon QLDB for immutable audit logs, ensure encryption at rest/transit, and handle PII data in compliance with Data Privacy Laws.

• Event-Driven Integration: Design asynchronous workflows using Kafka/RabbitMQ

• Team Leadership: Lead code reviews, enforce strict API versioning standards, and mentor mid/senior developers.

• Database Strategy: Design complex schemas in Amazon Aurora PostgreSQL (Transactional) and manage immutable ledgers in QLDB (Audit).

• AI Integration: Collaborate with Python engineers to integrate AI microservices into the core Java platform.

  
  

Preferred experience

• 6+ years of backend excellence, with deep expertise in Java 17+ and the Spring Ecosystem (Boot, Security, Data, Cloud).

• Microservices Mastery: Strong grasp of DDD, bounded contexts, and Event-Driven Architecture (EDA).

• AWS Native: Hands-on experience with ECS Fargate, Amazon RDS, API Gateway, and Cognito.

• Infrastructure as Code: Proficiency with AWS CDK. You treat infrastructure as software.

• Financial/Enterprise Context: Experience building systems that require high precision (Fintech, Banking) or replacing legacy giants (Oracle, SAP).

• Database Depth: You understand SQL performance tuning, transactions, and migration strategies.

• Modern CI/CD: Experience building pipelines in AWS CodePipeline.

• Language: Fluent English is mandatory. Spanish is a significant plus.

What to expect

• Flexibility - We already operate in multiple time zones and have been doing it for years. We have standard 40-hour work weeks. While our agency working hours are from 9 am to 7 pm CET, you’ll have the freedom to work flexible hours and maintain a healthy work-life balance. Just make sure the majority of your working hours fall within that time frame.

• Remote work - We like to think about ourselves as remote-natives. One of the perks of our remote team is that we genuinely trust you to get your job done. You can work from anywhere you see fit, as long as you have a decent internet connection and are available during our agency's working hours. We use HubStaff for time tracking and transparency into your work.

• Culture - We value collaboration, openness, a willingness to learn, lead, and a curious nature. Our approach encourages mistakes as long as we are willing to learn from them, fostering a culture where growth comes from understanding and overcoming challenges. If you like to work in teams that value great work over loud voices, you are in the right place.

• Autonomy and responsibility – You’ll be trusted to get things done efficiently and effectively.
  

Hiring process

• Pre-selection based on your application (We’ll review your experience, past projects, and skills).

• Introductory call with HR to get to know you better.

• Psychological evaluation.

• Interview with our Development Team leadership.

• Welcome to BB Agency.