Jobs C# / .NET

Stellar Logic specializes in custom IT solutions for international clients. We help businesses build and maintain internal systems and enterprise software that power their operations.

We’re looking for a Senior .NET Developer to join a long-term project. If you have solid experience with legacy .NET systems and enjoy bringing stability and quality to complex codebases — we want to meet you. 

Responsibilities

• Maintain and develop a legacy web application built on VB.NET and .NET 4.7.2
• Work with Web Forms and MVC / Web API architecture
• Design and optimize data solutions using MSSQL
• Develop and maintain frontend components using JavaScript, jQuery and Bootstrap
• Participate in code reviews, requirements analysis and sprint planning
• Ensure application stability and performance in an on-premise hosting environment

Requirements

• 3+ years of experience in .NET development
• Experience with VB.NET and .NET 4.7.2 (Web Forms, MVC, Web API)
• Strong knowledge of MSSQL
• Experience with JavaScript, jQuery and Bootstrap
• Comfortable working with on-premise infrastructure
• English B2+ for direct collaboration with the team

Nice to Have

• Experience supporting and refactoring legacy codebases
• Familiarity with Agile methodology

Why Work with Us?

🚀 Tailored Solutions: Every project is a fresh challenge — we build software that fits precisely with each client’s unique vision.

👥 Talent with Purpose: You’ll join a dedicated team where your contribution directly shapes what gets delivered.

⭐️ Commitment to Quality: We care about the “why” behind every feature. Every project reflects our dedication to building reliable, innovative systems.

💫 Empowered Teamwork: We value your voice. You’ll work closely with Tech Leads in a culture where great ideas are always heard.

What We Offer:

• Remote Work: Work from anywhere while contributing to impactful IT projects.
• Growth Opportunities: Be part of a dynamic, expanding team with opportunities for advancement.
• Flexible Hours & Paid Vacation: Manage your own time for a healthy work-life balance.
• Tax & Accounting Support: We handle the paperwork so you can focus on the code.

📌 This role is part of our pre-launch hiring — the project kicks off within the next month. If you're not in an urgent search and open to a confirmed start date in the near future, we'd love to connect now and move through the process ahead of time.

About SYNTECH Digital

We are an official Creatio partner and product company. SYNTECH builds and maintains 17+ Marketplace apps (Kanban, Gantt, Calendar, Pivot, Map, HRM, Manufacturing, and more) and delivers complex CRM/ERP implementations for clients across logistics, manufacturing, finance, and HR industries.

Responsibilities
    •    Develop and customize solutions on the Creatio platform: C# schemas, business processes, event listeners, scheduled jobs, and server-side scripts
    •    Build WCF / Web API services and integrations with external systems (Google APIs, payment gateways, ERP platforms)
    •    Contribute to SYNTECH’s proprietary Marketplace component suite (Angular Freedom UI components, back-end services)
    •    Write efficient SQL queries for PostgreSQL and MS SQL; optimize performance on large datasets
    •    Participate in technical pre-sales: architecture design, effort estimation, client communication
    •    Conduct code reviews, maintain technical documentation, support live projects
    •    Collaborate with the team via Git and CI/CD workflows

Requirements
    •    2+ years of commercial experience with C# / .NET (ASP.NET, Web API, WCF)
    •    Hands-on knowledge of the Creatio platform: EntitySchemaQuery, schemas, packages, Process Designer, Freedom UI
    •    Confident JavaScript / TypeScript (Angular or Backbone.js / Ext JS)
    •    Experience with SQL — PostgreSQL or MS SQL
    •    Solid understanding of SOLID, DRY, KISS principles
    •    Proficiency with Git
    •    English — B1+
Nice to Have
    •    Angular Freedom UI component development for Creatio
    •    Experience integrating Google Drive, payment APIs, ERP
    •    Familiarity with Creatio Marketplace package publishing process
    •    SignalR / real-time apps, Docker / container deployments

We Offer
    •    Competitive salary discussed individually
    •    Work on real products sold on Creatio Marketplace — not just client customizations
    •    Growth path to Tech Lead / Solution Architect
    •    Flexible 5-day schedule, fully remote
    •    24 days paid vacation
    •    Direct participation in pre-sales and product architecture decisions

This is a keystone hire. As our Senior Backend Engineer, you'll own the data and AI backbone of our ERP platform — the migration paths, ingestion layer, retrieval pipelines, and agentic systems that everything else depends on. Your work directly unblocks the rest of the product roadmap.

You'll design services and APIs that move data between factory floors, enterprise systems, and our AI and analytics workflows. You'll bridge on-prem and cloud, streamline data flows across environments, and keep the system reliable, scalable, and ready for what's next.

The ideal candidate thrives in startup ambiguity, has a track record of shipping new products from zero, and balances speed, usability, and the realities of regulated manufacturing.

What You'll Do

1. Own ERP data migration.

Lead the migration of customer data from legacy ERP and MES systems into our platform — schema mapping, transformation pipelines, validation, and cutover strategy.

2. Build factory connectivity and ingestion.

Design and ship services that ingest and aggregate data from ALS, IIoT devices, and enterprise systems on the shop floor, bridging on-prem and cloud reliably.

3. Build and manage the RAG pipeline.

Architect retrieval-augmented generation infrastructure that grounds our AI features in customer-specific manufacturing, quality, and compliance data.

4. Build AI agent workflows and analytics.

Develop agentic workflows and predictive / statistical analytics services that turn raw operational data into decisions and actions.

5. Implement and maintain MCP servers.

Build and operate Model Context Protocol servers that expose Cinovatech's data and tools to AI agents, with the security, schema discipline, and observability required for production use.

Required Qualifications

• 7+ years building and maintaining backend services or data-intensive web applications in production.
• Agent-driven AI engineering practice — Claude Cowork as your primary tool, with strong hands-on experience using Cursor, Claude Code, Codex, or similar.
• Disciplined about controlling quality, stability, and extensibility in agent-generated work.
• Strong experience with modern backend frameworks — Node.js, C#, or Python.
• Production experience with PostgreSQL — schema design, query optimization, and operating it at scale.
• Disciplined engineering fundamentals — SOLID, DRY, and Domain-Driven Design applied to complex business domains, with CI/CD pipelines, unit tests, and integration tests as part of your normal workflow.
• Hands-on with AWS services — RDS, ECS, SQS, S3, Bedrock, IoT Core.
• Exposure to integrating with AI providers — OpenAI, Bedrock, Claude, or similar.

Preferred Qualifications

• B.S. in Computer Science, Mathematics, Physics, Engineering, or equivalent practical experience.
• Experience in fast-moving startup environments — comfortable with weekly delivery cadence, evolving priorities, and shipping under ambiguity without breaking what matters.
• Experience building enterprise SaaS for complex, data-intensive, or manufacturing domains (ERP, MES, CRM).
• Hands-on with Industrial IoT protocols — MQTT, OPC-UA, Modbus.
• Experience with message-based or streaming systems (Kafka, Google Pub/Sub).
• Exposure to compliance frameworks such as SOC 2, GAMP 5, ISO 13485, or similar.

We’re building a next‑generation financial leasing ecosystem on Creatio — not just a CRM, but a unified platform that connects business processes, customer experience, and modern digital channels. To accelerate our growth, we’re looking for a Creatio Team Lead who will drive technical excellence and help scale the product.

💡 About the Project

Our core solution is a Creatio‑based platform that automates the full financial leasing lifecycle — from application to contract servicing. And we’re expanding fast:

📱 Mobile app (Flutter) 🌐 Web portal (Angular) 🔗 Integrations with external services via API

👥 The Team

You’ll join a strong cross‑functional team of 14 specialists:

• Backend & frontend developers
• Business analysts
• QA engineers
• DevOps

The team is established and motivated — now it needs a strong technical leader.

🎯 What You’ll Do

• Lead development on Creatio
• Design and evolve the system architecture
• Mentor and grow the engineering team
• Collaborate closely with business stakeholders and analysts

• Build the foundation for future mobile and web solutions

   

🛠️ What We’re Looking For

• 1+ year of experience as a Team Lead
• 3+ years of hands‑on experience with Creatio
• Strong knowledge of:
  • C#, .NET
  • JavaScript, ExtJS
  • REST API
  • SQL (MS SQL Server)
• Understanding of:
  • HTTP, XML/JSON
  • SDLC (Agile / Scrum)

• Experience with CI/CD (e.g., Jenkins) and Git

   

⭐ Why This Role Is Exciting

• You influence the product from the ground up
• A diverse tech landscape: CRM + mobile + web
• A team you can shape and develop

• Freedom to make architectural and technical decisions

   

🌟 Why 7,000 Employees Have Chosen Us

• Growth every day: structured career development, internal training programs, and opportunities to gain new skills.
• A supportive, inspiring team: a professional environment where your ideas matter and collaboration is the norm.
• Flexibility that works for you: hybrid format, flexible schedule, and the ability to balance productivity with comfort.
• Wellbeing matters: table tennis, psychological support, and legal assistance to help you stay balanced.
• Meaningful impact: participation in social initiatives that make a real difference and add purpose to your work.
• A culture of trust: mistakes are treated as learning opportunities, and achievements are celebrated together.
• Modern tools & technologies: everything you need to work efficiently and enjoy the process.