.NET Software Engineer (Vilnius)

The client is an established European payments technology provider serving banks, acquirers, processing centres and merchants across international markets. Its software supports POS terminal network management, transaction routing, real-time monitoring and payment infrastructure operations. The company also provides terminal services, acquiring network support and technical consulting. You will work on a mature, business-critical platform that continues to evolve as payment networks and customer requirements become more complex.

As the .NET Engineering Team Lead, you will guide an existing team of approximately 3–4 engineers while remaining closely involved in architecture, development and technical decision-making. You will coordinate several workstreams, turn business requirements into reliable solutions and take ownership of releases across an integration-heavy payment platform. Your work will directly affect system stability, transaction processing and the company’s ability to deliver dependable solutions across international markets.

• Lead, support and develop a team of approximately 3–4 software engineers;
• Own technical decisions across a large-scale, business-critical payments platform;
• Translate business and product requirements into clear architecture, specifications and delivery plans;
• Design and develop reliable services using C#, .NET and ASP.NET Core;
• Coordinate parallel workstreams, resolve priorities and keep releases on schedule;
• Guide integrations with POS terminals, payment processors, banking systems and external services;
• Maintain high engineering standards through code reviews, testing, documentation and knowledge sharing;
• Improve system performance, database efficiency, maintainability and operational resilience;
• Support secure development practices and alignment with PCI DSS and relevant payment industry requirements.

• 6+ years of software engineering experience with strong hands-on expertise in C# and .NET;
• Previous experience leading developers or acting as a Technical Lead or Team Lead;
• Strong understanding of software architecture, distributed components and complex system integrations;
• Advanced knowledge of SQL databases, data modelling, performance optimisation and data-intensive applications;
• Experience developing and maintaining large-scale products where reliability and continuity are commercially critical;
• Practical knowledge of APIs and integration technologies such as REST, SOAP, gRPC or WebSocket;
• Ability to coordinate multiple workstreams, prioritise effectively and independently own technical outcomes;
• Fluent spoken and written English and Russian.
• Experience with payment gateways, transaction processing, banking technology or POS infrastructure;
• Knowledge of JavaScript, React, Fluent UI, Entity Framework Core or NoSQL databases;
• Familiarity with TCP/IP communication, multithreading, cryptography and secure data transmission;
• Lithuanian language skills and practical familiarity with PCI DSS requirements.

🤝 Key Competencies

• Technical leadership: setting direction while staying close enough to the code to make informed decisions;
• Delivery ownership: balancing new functionality, system stability, technical debt and release commitments;
• Structured judgement: evaluating architectural trade-offs and making decisions with incomplete information;
• Clear communication: aligning engineers, business stakeholders and external integration partners around practical outcomes.

✨ The Employer Offers

• Meaningful technical ownership of a mature, business-critical payments product;
• A competitive compensation package reflecting your experience and contribution;
• Private health insurance;
• Internal and external professional training opportunities;
• Clear scope for career growth and broader leadership responsibility;
• Exposure to payment infrastructure projects across international markets;
• Office-based sports and leisure facilities, together with partner discounts.

If you want to lead engineers, shape the architecture behind real payment infrastructure and remain hands-on with complex .NET systems, this role offers the scope to make a visible technical and business impact.