Are you looking for an opportunity to shape the technical foundation of a fast-growing fintech company? Do you enjoy designing scalable, secure systems and solving complex architectural challenges? If yes, then Wallester AS might be the perfect place for you!
Wallester AS is an Estonian licensed payment service provider that develops financial digital technology and issues VISA cards. Since 2018, we have been an official Visa partner and Visa FinTech Fast Track Member issuing physical and virtual cards of any type: debit cards, credit cards, prepaid cards, and cards for business. Our distinctive advantage is a robust API-driven platform built by our in-house engineering teams and used by partners across Europe.
We are continuing to evolve our engineering organization and are establishing an Architecture team to support the long-term growth, scalability, and quality of our platform.
As a Software Architect (Backend) at Wallester AS, you will be responsible for defining, evolving, and maintaining the overall backend architecture of our platform. You will work closely with the Lead Architect and the Head of Engineering, as part of the Architecture team, to ensure architectural consistency, scalability, security, and long-term technical sustainability across the company.
You will collaborate with engineering team leads, senior engineers, product managers, and other stakeholders to translate business, regulatory, and operational requirements into scalable and maintainable technical solutions.
This role is not a people management position, but it requires strong technical leadership, system-level thinking, and the ability to influence engineering decisions across multiple teams. A key part of your mission will be to raise the architectural maturity of the organization and to help grow existing engineering talent into Tech Leads and Architect roles over time.
We are seeking a Software Architect to join Wallester’s headquarters in Tallinn (Golden Gate, Rotermanni Quarter).
- Golang
- gRPC, Protocol Buffers
- JSON REST APIs
- PostgreSQL, Redis
- Docker, Kubernetes
- AWS infrastructure
- Service-oriented / Microservice architecture
- Define and evolve the overall backend architecture of the Wallester platform
- Work closely with the Lead Architect and Head of Engineering on architectural vision, strategy, and governance
- Actively contribute to building and shaping the internal Architecture team
- Design scalable, reliable, and secure backend systems and services
- Establish and maintain architectural principles, standards, and best practices
- Review and guide technical designs for complex, high-impact, or cross-team initiatives
- Support engineering teams and tech leads in making sound architectural and technology decisions
- Mentor senior engineers and tech leads, helping them grow into future Tech Lead and Architect roles
- Identify and address systemic technical risks, bottlenecks, and technical debt
- Ensure backend systems meet performance, reliability, security, and compliance requirements
- Contribute to long-term technical strategy and platform evolution
- 8+ years of professional software development experience
- Strong background in backend system design and architecture
- Extensive experience with distributed systems, microservices, and APIs
- Strong experience with Java/Python/С#/Golang or comparable backend technologies
- Deep understanding of databases, data modeling, and data consistency (PostgreSQL)
- Experience designing systems for scalability, high availability, and fault tolerance
- Experience working with cloud platforms (AWS, GCP, or Azure)
- Excellent analytical, problem-solving, and communication skills
- Ability to clearly explain complex technical concepts to both technical and non-technical stakeholders
- Experience in fintech, payments, or other regulated industries
- Knowledge of security best practices and standards (OWASP, PCI DSS)
- Experience with event-driven architectures or messaging systems
- Familiarity with DevOps practices and infrastructure-as-code
- Experience participating in technical audits or compliance-driven projects
- Competitive salary
- Development and career opportunities
- Medical insurance upon completion of the probationary period
- Supportive and caring leadership
- Modern offices in the city center
- A chance to work as part of a highly motivated and talented team
- Referral program
- Stebby
- Team building and company events
- Free parking
Top Skills
What We Do
Wallester is an Estonian-licensed financial institution and an official Visa partner since 2018, specialising in innovative digital financial solutions and card issuance. We empower companies across the European Economic Area (EEA) and the UK to streamline payments, launch branded cards, and scale efficiently.
What we do:
White-Label Solution with Embedded Finance:
Our White-Label solution enables businesses to integrate financial services directly into their platforms - a concept known as embedded finance. This allows companies to launch branded payment cards tailored to their specific needs, enhancing customer experiences and opening new revenue streams. We ensure a swift time-to-market with simplified integration and dedicated support from our implementation team.
Wallester Business: Corporate Expense Management:
Wallester Business is designed to modernise corporate expense management. It provides companies with instant access to virtual and physical Visa cards, streamlining financial processes through a modern app and comprehensive portal. Features include expense tracking, budget analytics, and seamless integration with accounting systems to enhance financial oversight and efficiency.
With a diverse team of over 140 professionals located in Estonia, Latvia, France and the United Kingdom, we are dedicated to developing high-quality, profitable products for our clients. Our passion for innovation drives us to improve and adapt to the evolving financial landscape continuously.
We aim to elevate businesses by providing the most advanced financial technologies, enabling them to reach new heights in efficiency and growth. We are always open to collaboration and eager to assist companies in navigating the future of finance.
Discover how Wallester can transform your financial operations and drive your business forward. Learn more at www.wallester.com and follow us on Instagram (@wallester_com) or Facebook (@Wallester)
