Our Clients

We develop business-critical systems, including eCommerce, management, and bioinformatics platforms. Using Python, MongoDB, PostgreSQL, and React, we create scalable, high-performance solutions that ensure reliability and efficiency for essential operations.
  • Architecture
  • Development
  • UX/UI
  • DevOps

SignSpace – Secure Digital Signing Service

SignSpace is a robust digital signing service designed for secure and efficient document handling.
Our team was responsible for the system architecture, signing service implementation, and complete engineering.
We leveraged MongoDB, Python, React, and AWS to build a scalable and reliable platform that ensures seamless digital signing for businesses and organizations.
Find out more
Varle.lt
  • Architecture
  • Development
  • UX/UI
  • DevOps

Varle.lt – Leading Lithuanian Online Retailer

Varle.lt is one of Lithuania’s top online retailers, and we have been their trusted technology partner for over 15 years.
We have been responsible for architecture, development, and all IT solutions, ensuring scalability and performance.
Utilizing PostgreSQL, Python, Django, MongoDB, and Elasticsearch, we have helped build and optimize their eCommerce platform to support continuous growth and innovation.
Find out more
Congenica
  • Architecture
  • Development
  • UX/UI
  • DevOps

Congenica – Advanced Genomic Data Analysis

Congenica is a leading provider of genomic data analysis solutions.
Our team collaborates closely with Congenica’s developers, assisting with Python development, DevOps, and frontend work to enhance the platform’s performance, scalability, and user experience.
Find out more

Services

We offer tailored web development services, including eCommerce solutions, business management systems, bioinformatics platforms, and digital signing systems. Whether starting projects from scratch or enhancing existing teams, our expertise in Python, AI, and databases ensures efficient, scalable, and innovative results.

Business Requirements Consulting

We assist businesses in defining clear and actionable software requirements. Through in-depth analysis of workflows, user needs, and business goals, we ensure that projects start with a structured plan, leading to efficient and scalable digital solutions.

Scalable System Architecture

Our team designs robust, high-performance system architectures that serve as a strong foundation for software solutions. We ensure scalability, security, and maintainability by leveraging best practices and modern technologies.

Full-Stack Development (Backend & Frontend)

We provide end-to-end development services, building efficient and maintainable backend systems and user-friendly, interactive frontends. Our expertise in Python, Django, PostgreSQL, MongoDB, React, and AWS ensures high-quality, scalable solutions.

DevOps & Cloud Infrastructure

We streamline development, deployment, and operations with modern DevOps practices. Our expertise includes CI/CD pipelines, cloud infrastructure, automation, and monitoring, ensuring smooth and efficient software delivery.

Team Augmentation & Collaboration

We integrate seamlessly with existing teams, providing expert developers and architects to accelerate development and improve efficiency. Whether short-term or long-term, our specialists enhance productivity while maintaining high-quality standards.

Ongoing Maintenance & Long-Term Support

We ensure the stability and security of your systems with continuous monitoring, updates, and proactive issue resolution. Our long-term support services help businesses maintain reliable and up-to-date digital solutions.

Success Stories

  • 505 has played a significant role in SignSpace service development since its establishment.

    In addition to programming and maintenance, the development team's expertise has also played a key role in the design and implementation of technical architecture.

    It is important to our customers that the software developers who develop and maintain the service are professional, committed and reliable.

    I am proud that 505 developers are part of the SignSpace service team - development is in good hands and as a bonus, working with them is a lot of fun.
    SignSpace Vastuu Group
  • Atsiliepimas is Telesofto
    Telesoftas

Yes, We're Hiring!

We’re looking for talented and driven professionals to join our growing team. If you thrive in a flexible work environment, enjoy solving complex challenges, and want to work on impactful projects, we’d love to hear from you. Explore our open positions and become part of a team that values expertise, collaboration, and innovation.
Development
Python Developer Vilnius, Lithuania

Job Description

We are looking for a skilled Backend Developer to join our team and help build and maintain scalable, high-performance applications. You will work on business-critical systems, collaborating with frontend developers, DevOps engineers, and product teams to deliver reliable and efficient solutions. Your primary focus will be on backend logic, database management, and API development using modern technologies.

Responsibilities

  • Develop and maintain backend services and APIs.
  • Design and optimize database structures (PostgreSQL, MongoDB).
  • Collaborate with frontend developers to integrate UI components with backend logic.
  • Ensure application security, scalability, and performance.
  • Implement and maintain CI/CD pipelines and cloud-based solutions.
  • Debug, troubleshoot, and resolve system issues efficiently.
  • Write clean, maintainable, and well-documented code.

Requirements

  • Proven experience as a Backend Developer (3+ years preferred).
  • Strong proficiency in Python (Django, FastAPI, or Flask).
  • Experience with relational and non-relational databases (PostgreSQL, MongoDB).
  • Familiarity with Docker, Kubernetes, and AWS for deployment and scaling.
  • Knowledge of RESTful APIs, WebSockets, and microservices architecture.
  • Understanding of DevOps practices and CI/CD pipelines.
  • Strong problem-solving and debugging skills.
  • Ability to work independently and in a collaborative team environment.
  • Good communication skills and the ability to document work effectively.
 Apply
Management
Project manager Vilnius, Lithuania

Job Description

We are looking for an experienced Project Manager to oversee and coordinate web development projects. You will be responsible for ensuring that projects are delivered on time, within scope, and aligned with business objectives. Working closely with developers, designers, and stakeholders, you will facilitate clear communication, manage resources, and drive project success.

Responsibilities

  • Plan, execute, and oversee software development projects from inception to completion.
  • Define project scope, objectives, and deliverables in collaboration with stakeholders.
  • Create and maintain project timelines, ensuring deadlines are met.
  • Communicate effectively with clients and development teams to align expectations.
  • Identify potential risks and implement mitigation strategies.
  • Monitor project progress and make necessary adjustments to ensure quality outcomes.
  • Ensure efficient resource allocation and team productivity.
  • Maintain project documentation, reports, and status updates.

Requirements

  • Proven experience as a Project Manager in software development or IT-related fields.
  • Strong understanding of Agile methodologies (Scrum, Kanban) and project management tools (Jira, Trello).
  • Experience managing software development teams and coordinating cross-functional collaboration.
  • Ability to communicate effectively with both technical and non-technical stakeholders.
  • Strong problem-solving and decision-making skills.
  • Ability to handle multiple projects and prioritize tasks efficiently.
  • Familiarity with web technologies (Python, React, databases) is a plus.
  • Excellent organizational skills and attention to detail.
 Apply

Why choose us?

Flexible Work Environment & Self-Management

We empower our team with a high level of autonomy, allowing flexibility in work schedules and decision-making. We trust our employees to take ownership of their tasks, ensuring efficiency while maintaining a healthy work-life balance.

Experienced & Knowledgeable Team

Our team consists of highly skilled professionals with extensive experience in software development, system architecture, and DevOps. We foster a culture of continuous learning and knowledge sharing, ensuring that we stay ahead of industry trends and deliver top-quality solutions.

Meaningful & Impactful Projects

We work on business-critical systems that drive real-world success for our clients. From large-scale eCommerce platforms to advanced AI-driven solutions, our projects offer opportunities to solve complex challenges and make a tangible impact.

Let's talk

Got an idea or need a tech partner you can rely on? Let’s have a chat and see how we can work together to bring your project to life.

Drop us a line at [email protected].
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UAB 505 HQ
Registration code 302770611
VAT LT100008636419
Švitrigailos g. 11B, Vilnius
+370 654 48328