Full-Stack Engineer

GG is always on the hunt for down-to-earth individual thinkers who know how to work in a team. If you’d like to build bulletproof products and create long-lasting digital legacies for startups all around the world, then read on to find out more about this job position.

Qualifications

• 5+ years of experience as a Golang software engineer
• PostgreSQL knowledge
• Experiences with GraphQL
• Experiences with microservices
• Good usage of programming patterns
• Strong fundamentals in software engineering and previous experience building modern infrastructure (microservices)
• Proficient understanding of code versioning tools, such as Git
• Conversation level English language

It would be great if you have

• Experience with Typescript & Angular
• Experience with Agile Methodologies
• Experience with Kubernetes
• Familiarity with regulations in the medical device and software fields

Responsibilities

• Design, build, and own the core services powering our product
• Develop key components of our application and ensure that code performs efficiently
• Promote sound engineering practices and drive technical strategy and roadmaps
• Demonstrate ability to solve problems quickly and independently
• Work in a team and support others to maintain a high coding standard

What we offer you

• Taking part in innovative projects for international clients related to Sports, Automotive, Analytics, and many others
• Work in a start-up-friendly environment, where every team member has a direct impact on our overall success
• Resources and mentorship to help you advance your career and develop your skills
• Paid courses and conferences
• Regular performance reviews and personal development plans
• 22 vacation days at the start and +1 day for every year spent at GG Studio
• Premium Private Health insurance package and up to 100% covered sick leave
• Paid referrals
• Summer and winter team buildings, hangouts at Friday Chill Out
• Personalized gifts for: Birthday, New Year, and International Women’s Day
• Office perks: Office in the City Center, with fruits, healthy snacks, and coffee at your disposal
• Your personal (legal) plant

We are Team possible – the people behind Proximus, Proximus NXT, Proximus Ada, and more. Nice to see you here!

United by a shared purpose, we’re building a smarter, trustful and more connected world.

That means embracing technology and celebrating change. We think possible and then make it possible. And of course, we love what we do.

Sounds like your kind of place?

Your Job

• You support the design and development of high-quality frontend applications following best practices to ensure high availability, scalability and resilience.
• You develop and maintain Angular web applications and Java-based microservices.
• You write both unit and integration tests and develop automation tools for daily tasks.
• You participate in the release process, ensuring smooth deployments.
• You collaborate with the team in technical analysis and grooming sessions.
• You troubleshoot and debug applications to ensure a high uptime and good performance.
• You challenge ideas and opinions to avoid pitfalls and inefficient complex solutions.
• You create and maintain technical documentation for all code changes and updates.
• You stay up to date with emerging trends and technologies and suggest new approaches to improve efficiency and productivity.
• You participate in code reviews to maintain code quality and identify opportunities for improvement.
• You participate and contribute to the integration testing of the developed features.

Your Profile

• You have bachelor’s degree in computer science, Information Technology, or a related field.
• You have a minimum of 4 years of hands-on experience in Frontend development using Angular.
• You have good knowledge and experience in HTML, CSS.
• You have 2 - 3 years of experience with building performant RESTful APIs in Java (experience with GraphQL is a plus).
• You have 2 to 3+ years of experience in SQL and NOSQL stores (e.g., MySQL, Oracle, Couchbase, etc.).
• You are familiar with Git, Jenkins and Agile/DevOps methodologies .
• You are familiar with automated unit test frameworks like Junit and Mockito.
• You have experience with building tools like Maven or Gradle.
• You have experience with Microservices Architecture.
• You have a good understanding of Agile methodology.
• You can work autonomously on development tasks and troubleshooting.
• You have a proactive attitude with excellent interpersonal, and strong written and verbal communication skills.
• You possess strong problem-solving skills and ability to work independently and collaboratively.
• You are fluent in English.

This is what to expect

• Drive positive change with confidence, turning bold ideas into solutions to remain at the forefront of technology
• Keep on learning, evolving, and building your career in a digital space that truly supports your growth journey
• Real connections power real progress. Collaboration is how you will transform challenges into new opportunities.
• Be welcomed for exactly who you are. Your unique perspective and identity will strengthen our team.
• Design your balance with work options and a culture that lets you excel in your role and enjoy life outside of work.
• Enjoy an attractive salary package including bonus, medical coverage, family-friendly perks, meal allowance, fitpass and other cool benefits designed to support you every step of the way.

About Us

Proximus Group is a Belgian telecom and digital services company active in the Benelux and internationally.

In Belgium, Proximus is the country’s leading telecommunications provider, offering mobile, internet, TV, IT, cloud, cybersecurity, and digital solutions to residential customers, businesses, and public organizations.

Its international arm, Proximus Global, delivers worldwide digital communications and identity services, including voice, messaging, connectivity, IoT, verification, and fraud protection.

With a growing presence in Belgrade, we established our office in 2023 and have since expanded to over 130 employees.

Do you want to be part of the team behind the leading convertible bonds technology, data, and services?

Founded in 2010, Leversys provides trading and risk management systems, data products, and related services to leading global investment banks and many of the world’s top 50 hedge funds.

The company is a dynamic, small, flat-structured organization with offices in major global financial centers.

Leversys’s valuation model, systems, and data are recognized as among the market leaders in the convertible bonds space.

Following the launch of the Marketspace platform, Leversys is entering an exciting scale-up phase, aiming to play a leading role in the digitalization of the convertibles market.

This creates opportunities for team members to make a meaningful impact while growing alongside the business as the product offering continues to expand.

As a Senior Software Engineer (back-end), you will:

• Join a product development team involved in the full delivery lifecycle, from concept and specification through UI design, development, QA, and release.
• Work closely with product leads to turn ideas and client requirements into shipped features, with real ownership throughout.
• Collaborate with a small team of senior engineers where knowledge sharing is natural, standards are high, and ideas are encouraged.
• Follow a structured onboarding plan that combines early codebase contributions, architectural understanding, and exposure to the convertible bond domain.
• Contribute to a product company that builds and owns its platform, giving your work lasting impact and visibility from problem definition to delivery and growth.
• Build mission-critical applications for a specialised financial market with an established client base, keeping the engineering work purposeful and technically engaging.
• Work on both a cloud-based, globally distributed SaaS platform and an on-premises version.
• Propose and implement ideas rather than simply execute assigned tickets, with engineering input valued throughout the product lifecycle.
• Grow across the stack with support from experienced engineers and exposure to frontend, backend, services, and integrations.
• Strengthen your technical expertise while building enough convertible bond knowledge to make better engineering decisions.
• Gain experience in a specialised financial domain that few engineers encounter, adding long-term depth and market value to your profile.

What we’d like you to bring to Leversys:

• At least five years of relevant experience as a back-end developer.
• Strong foundation in programming, data structures, and algorithms.
• Strong experience with major object-oriented languages such as C#, Java, C++, or similar.
• Strong knowledge of relational databases such as SQL or similar.
• Proven ability to design scalable, high-performance back-end architectures.
• Experience with distributed systems and large-scale messaging platforms.
• Knowledge of multithreaded programming.
• Solid understanding of internet technologies such as TCP/IP and HTTP.
• Good understanding of the full software development life cycle.
• Familiarity with service-oriented design and related technologies, including web services, REST, JSON, and GraphQL.
• Familiarity with version control tools such as Git.
• Ability to use tracing and logging tools to diagnose and resolve production issues quickly.
• Desirable: understanding of design patterns.
• Desirable: experience with unit and integration testing.
• Desirable: exposure to major cloud platforms such as AWS or Azure.
• Desirable: experience with major UI frameworks such as Angular, React, Vue.js, or similar.
• Desirable: experience with financial software and SaaS products.
• A strong desire to learn, develop, and succeed.
• A commitment to achieving high standards.
• Strong attention to detail.
• Creativity and passion for building products.
• Ability to work with complex mathematical and financial concepts.
• Excellent analytical skills and a structured, logical approach to complex problem-solving.
• Strong written and verbal communication skills in English.
• Ability to explain complex technical concepts clearly to both technical and non-technical stakeholders.
• Strong interpersonal skills.
• Comfort working in a dynamic, multi-tasking environment.
• A bachelor’s degree or higher in Computer Science, Engineering, or a related quantitative field from a leading institution.

In return, Leversys offers you:

• A genuine opportunity to have an impact and grow your career in established capital markets FinTech.
• The ability to develop and apply a unique blend of knowledge and skills.
• The scope to work on exciting and highly dynamic projects and interact with clients.
• Personal development support.
• Sponsorship to enhance your skills and continue your education.
• An effective hybrid working structure.
• Top of the market remuneration, based on the experience level.
• Twenty-five days holiday, pro-rata.

This is your opportunity to work with a company that actively looks to its people to take charge, come up with ideas and innovate.

We look forward to hearing from you.

This is us
At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job
We're looking for experienced Java Engineers of middle and senior levels for our
Java Talent Pool
. Even if there isn't any immediate position available, we highly value the expertise and skills of qualified candidates. Rest assured, we will consider your profile for future projects and opportunities as they arise.

This is you

• Experience in developing Java solutions (5+ years for a Senior level and 3+ years for an Intermediate level)

• Working experience with Java 8+, Lambda expressions, Stream API

• Hands-on experience with:

• Spring Boot
• JPA/Hibernate
• REST
• Docker, Docker Compose
• Maven
• JUnit, Mockito
• Git
• Knowledge of Agile frameworks: Scrum, Kanban
• Excellent analytical and communication skills
• Professional level of written and spoken English

Nice-to-have skills:

• Microservices, Domain-Driven Design, Ports and Adapters
• Kafka, RabbitMQ
• Spring Cloud
• Spring Reactive (Reactor, WebFlux)
• OAuth 2.0, Keycloak
• Liquibase, Flyway
• Amazon Web Services or Google Cloud Platform
• Kubernetes, on-premises or cloud

This is your role

• Participating in creating and clarifying user stories and sprints planning
• Translating functional and architectural requirements into working code
• Writing unit and integration tests to verify proper functioning
• Troubleshooting production issues, ensuring application operational stability and performance
• Following project-specific development guidelines and industry best practices for software development
• Working directly and efficiently with developers, architects, and project leads
• Performing code reviews
• Mentoring and assisting less experienced team members.

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.