Senior Backend Developer

  • Location: bristol
  • Term: Contract
  • Salary: Competitive
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Job Description

Waracle is a 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.

We are a high growth business and were recently recognised on the E2E Tech 100 list of the fastest growing tech companies in the UK. Our growth has been based on great people working collaboratively with innovative clients, we are constantly seeking the best industry talent to join our dynamic teams, gaining experience and exposure to a range of languages and technologies. We want our work to have a positive impact within our key industries of digital health, financial services and energy. Contributing to a Healthier, Wealthier and Greener world.

Waracle is looking for an experienced Senior Backend Developer, with experience in Java and Go / Golang to join us on a contract basis.

This is a hybrid role, working 2 days per week from our client’s offices in Bristol.

As a Senior Backend Developer, some of the responsibilities include:

  • Develop secure and scalable backend services for a mobile banking application.

  • Design and implement enterprise-class microservices to meet the needs of our security infrastructure.

  • Ensure the reliability, scalability, and performance of backend services through rigorous testing and optimization.

  • Document technical specifications, architecture, and implementation details for future reference and knowledge sharing.

  • Consult on wider architectural or development paradigms such as security, API architecture and SDLC.

  • Collaborate with cross-functional teams to seamlessly integrate backend services with existing systems.


  • Proficiency in Java development with a strong understanding of object-oriented programming principles.
  • Proven experience in building Go / Golang microservices at enterprise level
  • Experience with JCE frameworks for implementing cryptographic algorithms and ensuring data security.
  • Strong understanding of RESTful API design and implementation.
  • Strong communication skills and ability to articulate technical concepts to both technical and non-technical stakeholders.

Desirable Experience

  • Experience with cloud-based architectures and services (e.g., AWS, Azure, Google Cloud Platform).
  • Knowledge of containerisation technologies such as Docker and Kubernetes.
  • Experience with application security, particularly in mobile app security.

Recruitment process

The recruitment process you can expect for this role is an initial call with your dedicated Talent Acquisition Partner 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!). After that, will follow a technical exercise and technical interview, and finally an intro call with the your new team, where you have an opportunity to showcase your technical craft, find out more about the role and your skills and experience. Your Talent Acquisition Partner guiding you through the whole process to your first day with us.

Benefits for our people

Working for Waracle means you are part of an energetic and diverse community of technologists who care deeply about making a difference. We offer a wide range of benefits that support your wellbeing, health, personal and professional development goals. Our benefits package is reviewed regularly to ensure the best experience for everyone.

  • Company Pension iconCompany Pension Scheme matching 5%
  • Medicash proactive iconMedicash proactive
  • Group sickness cover iconGroup sickness cover
  • Death in service benefit iconDeath in service benefit
  • Regular fun meetups iconRegular fun meetups
  • Enhanced maternity / paternity leave iconEnhanced maternity / paternity leave
  • Cycle to work scheme iconCycle to work scheme
  • Remote first ethos iconHybrid working
  • 31 days off icon35 days holidays
  • Discounts iconDiscounts
  • Flexible hours available iconFlexible hours available

Frequently-asked questions

Here are some of the things that people tend to ask about working at Waracle.

Absolutely! At Waracle, we welcome both permanent and contract applicants. Each job posting indicates if it's open to contract applications. We offer a diverse range of projects, both within and outside IR35 regulations, catering to various preferences and expertise levels.

We work on a Hybrid working model and offer flexible working hours. We're spread across 4 vibrant UK offices, but our teamwork isn't confined to those spaces, it's all about collaboration! While using the office is optional, each of us has a home office setup, relishing the freedom of hybrid workstyles. As of now, remote work outside the UK isn't part of our standard practice.

As proud sponsors, we're geared up to provide sponsorship for eligible roles. Be sure to view the specific job listing you're interested in to make sure we are accepting applications for sponsorship. If it doesn't quite fit, consider diving into our talent pool for potential future opportunities!

We always want to hear from talented people, join our talent pool 👇 and we'll contact you when a new opportunity becomes available.

Equal Opportunities

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.

We are not accepting applications from recruitment agencies.

Feel like a good fit?

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