Waracle are looking for a Senior Developer for an exciting new role joining our world-class digital technology consultancy and home to a diverse, smart, curious and ambitious community of specialists in technology-driven transformation.
We work with ambitious clients to help them solve their biggest business and customer challenges. We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design and delivery to operations.
This is a Hybrid role working from our Sofia office 2 days a week
As a Senior Java Developer, you will do so much more than just write code; you will be a vital technical mentor, a collaborator, and a guardian of software quality. You will have the creative freedom to design and deliver end-to-end backend features and subsystems that are modular, scalable, and secure.
We know that great technology is built by supported, collaborative teams. If you enjoy uplifting others through constructive feedback, sharing knowledge, and balancing technical excellence with real-world delivery, you will find a highly rewarding home here
In this role, you will report to the Lead Developer and impact our projects across several key areas:
Architectural Delivery: Designing and delivering end-to-end backend subsystems while ensuring code remains modular, maintainable, and scalable.
Quality & Security: Act as a champion for software excellence by conducting thoughtful peer reviews and applying defensive measures for robust application security.
Technical Guidance: Shaping our testing strategies across unit and service levels while introducing innovative industry ideas to the practice.
Consulting & Communication: Translating complex technical trade-offs into clear, inclusive language for clients and stakeholders, presenting confident product demonstrations.
Mentorship & Practice Growth: Nurturing the growth of junior colleagues through supportive coaching , while contributing lessons learned to Waracle’s collective body of knowledge.
Delivery Accountability: Thoughtfully evaluating the trade-offs between speed and quality, taking collaborative ownership of successful feature delivery.
What You’ll Bring
We welcome diverse perspectives and recognise that great developers come from a variety of backgrounds. For this role, we are looking for:
3+ years of experience working with Java.
Deep expertise in backend architectures, specifically with microservices and event-based systems.
A strong understanding of industry-standard security (OWASP) and compliance (such as GDPR or SOC2).
Proven capability in optimising application performance, including query tuning, caching, and threading.
A collaborative approach to testing, with the ability to guide testing strategies across multiple levels.
Excellent communication skills, with a passion for mentoring others and building an inclusive engineering culture.
The Recruitment Process
The recruitment process you can expect for this role is an initial call with your dedicated Talent Attraction Partner and an engineer from our technical panel who will chat with you about Waracle, what you are looking for in a new position, the salary for the role, notice period and benefits (the important stuff!). It’s also a great opportunity for us to get a high-level overview of your technical background.
After that, you'll be invited to a two-stage interview process where you have an opportunity to find out more about the role and showcase your skills and experience. Your Talent Attraction Partner will guide you through the whole process to your first day with us.
Our Benefits
We believe in supporting our team, inside and outside of work. Here's a glimpse of what you can expect:
Healthcare and insurance:
Additional health insurance with dental treatment included
Wellbeing support
Entertainment and discounts:
Team parties and teambuildings
Multisport card
CoolFit card
Professional development:
Certification Courses
Learning Pathways and Transparent career paths
Udemy Business
Networking Opportunities
Public Speaking Opportunities
Others:
MackBook, peripherals, and other gadgets that are needed
Charity Committee
We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, gender, disability, religion/belief, sexual orientation or age.
Skills Required
- 3+ years of experience working with Java
- Deep expertise in backend architectures, specifically microservices and event-based systems
- Strong understanding of industry-standard security (OWASP) and compliance (GDPR or SOC2)
- Proven capability in optimising application performance, including query tuning, caching, and threading
- Collaborative approach to testing and ability to guide testing strategies across multiple levels
- Excellent communication skills and experience mentoring others
- Hybrid working from Sofia office two days a week
What We Do
Waracle design & engineer intelligent digital products for financial services, health and energy businesses across the UK & Europe. Our team of industry-leading experts create digital products that generate vast quantities of data via user interactions, customer engagement & novel use of device sensors. The high-quality, clean data that we generate has been used to power some of the most innovative uses of machine learning and artificial intelligence in our chosen sectors. We collaborate with clients such as the NHS, Imperial College London, Virgin Money, LifeArc, Natwest, Royal London, Sainsbury's Bank, Scottish Power, Iberdrola and more. We are Waracle - Intelligent Digital Experiences. For careers visit - www.waracle.com/careers








