334 Software Developers jobs in Kolkata

Job Title: Full Stack Polyglot Developer (Ubuntu + Windows Server, IT Ops & Cybersecurity)

Location: Remote

 Cybersecurity & IT Operations First

Join a team where server expertise and security are the foundation . You will be working with Ubuntu Server LTS and Windows Server 2022/2025 , managing IT operations across both environments while also coding full stack applications. From infrastructure setup, access management, monitoring, and patching to polyglot development and cybersecurity hardening , this role demands end-to-end ownership .

Our security stack includes Wazuh, Falco, Suricata, Zeek, Trivy, Keycloak, Teleport, and ELK/Graylog , with optional enterprise tools like CrowdStrike, Nessus, and Splunk .

 About the Role

Build secure, enterprise-grade cloud platforms where developers code in centralized IDEs, deploy seamlessly to Kubernetes, and collaborate globally.

We’re seeking Full Stack Polyglot Developers who are not only comfortable across frontend and backend development but also experienced in Linux and Windows server administration, IT operations, and DevOps security .

This is not a narrow role, we want true polyglots who can code, secure, deploy, and operate across multi-language, multi-platform stacks.

 Our Full Tech Stack

Core Server Platforms & IT Ops

Ubuntu Server LTS • Windows Server 2022/2025 • Active Directory • Proxmox VE or alternate• Ceph • NFS/SMB • System administration (patching, monitoring, backups, upgrades, troubleshooting)

Programming Languages

Go • Java • Python • Node.js • TypeScript • React • Angular • Vue.js • Ruby • C# • C/C++ • Bash • PowerShell

Databases & Storage

PostgreSQL • MySQL/MariaDB • MongoDB • Redis • Elasticsearch/OpenSearch • Ceph

DevOps & Infrastructure

Terraform • Ansible • Docker/Containerd • Kubernetes • Helm • Kustomize • Argo CD • Argo Workflows • GitLab/Gitea • Harbor

Monitoring & Observability

Prometheus • Grafana • Loki • Tempo • OpenTelemetry

Cybersecurity (Open Source & Paid)

Wazuh • Falco • Suricata • Zeek • OpenVAS/Greenbone • Trivy • Keycloak • Teleport • ELK Stack • Graylog • ClamAV • Microsoft Defender • Nessus • CrowdStrike Falcon • Splunk • Sophos

Collaboration & Tools

OpenProject • Mattermost/Zulip • Wiki.js • Apache Guacamole

 What We’re Looking For

• Deep expertise in Ubuntu Server & Windows Server administration (IT operations, patching, upgrades, monitoring, troubleshooting)
• Developers who can work across multiple languages and platforms
• Comfortable in both frontend and backend development
• Skilled in DevOps automation, infrastructure management, and cybersecurity
• Ready to contribute in enterprise-level, cloud-native environments

 Why Join Us

• Work with cutting-edge open source + enterprise cybersecurity and IT operations technologies
• Be part of a polyglot engineering team with global collaboration
• Shape the future of secure, reliable, and scalable cloud development platforms

Apply now to join our team of Polyglot Full Stack Developers and IT Operators building the next generation of enterprise-grade, cybersecure software.

Job Title: Full Stack Polyglot Developer (Ubuntu + Windows Server, IT Ops & Cybersecurity)

Location: Remote

 Cybersecurity & IT Operations First

Join a team where server expertise and security are the foundation . You will be working with Ubuntu Server LTS and Windows Server 2022/2025 , managing IT operations across both environments while also coding full stack applications. From infrastructure setup, access management, monitoring, and patching to polyglot development and cybersecurity hardening , this role demands end-to-end ownership .

Our security stack includes Wazuh, Falco, Suricata, Zeek, Trivy, Keycloak, Teleport, and ELK/Graylog , with optional enterprise tools like CrowdStrike, Nessus, and Splunk .

 About the Role

Build secure, enterprise-grade cloud platforms where developers code in centralized IDEs, deploy seamlessly to Kubernetes, and collaborate globally.

We’re seeking Full Stack Polyglot Developers who are not only comfortable across frontend and backend development but also experienced in Linux and Windows server administration, IT operations, and DevOps security .

This is not a narrow role, we want true polyglots who can code, secure, deploy, and operate across multi-language, multi-platform stacks.

 Our Full Tech Stack

Core Server Platforms & IT Ops

Ubuntu Server LTS • Windows Server 2022/2025 • Active Directory • Proxmox VE or alternate• Ceph • NFS/SMB • System administration (patching, monitoring, backups, upgrades, troubleshooting)

Programming Languages

Go • Java • Python • Node.js • TypeScript • React • Angular • Vue.js • Ruby • C# • C/C++ • Bash • PowerShell

Databases & Storage

PostgreSQL • MySQL/MariaDB • MongoDB • Redis • Elasticsearch/OpenSearch • Ceph

DevOps & Infrastructure

Terraform • Ansible • Docker/Containerd • Kubernetes • Helm • Kustomize • Argo CD • Argo Workflows • GitLab/Gitea • Harbor

Monitoring & Observability

Prometheus • Grafana • Loki • Tempo • OpenTelemetry

Cybersecurity (Open Source & Paid)

Wazuh • Falco • Suricata • Zeek • OpenVAS/Greenbone • Trivy • Keycloak • Teleport • ELK Stack • Graylog • ClamAV • Microsoft Defender • Nessus • CrowdStrike Falcon • Splunk • Sophos

Collaboration & Tools

OpenProject • Mattermost/Zulip • Wiki.js • Apache Guacamole

 What We’re Looking For

• Deep expertise in Ubuntu Server & Windows Server administration (IT operations, patching, upgrades, monitoring, troubleshooting)
• Developers who can work across multiple languages and platforms
• Comfortable in both frontend and backend development
• Skilled in DevOps automation, infrastructure management, and cybersecurity
• Ready to contribute in enterprise-level, cloud-native environments

 Why Join Us

• Work with cutting-edge open source + enterprise cybersecurity and IT operations technologies
• Be part of a polyglot engineering team with global collaboration
• Shape the future of secure, reliable, and scalable cloud development platforms

Apply now to join our team of Polyglot Full Stack Developers and IT Operators building the next generation of enterprise-grade, cybersecure software.

About the Role

We are seeking a talented MERN Stack Developer to architect and implement the backend infrastructure and APIs for a mobile multiplayer game. The focus will be on building real-time battling systems, matchmaking logic, and leaderboard functionality. You will be responsible for designing, coding, and optimizing APIs that ensure smooth player-versus-player (PvP) experiences, persistent progression tracking, and global ranking systems.

Key Responsibilities

• evelop and maintain RESTful and GraphQL APIs for multiplayer gameplay.

• B ild real-time matchmaking and battle synchronization APIs using Node.js, Express, and Socket.io/WebSockets.

• D sign and implement leaderboard APIs (global, regional, seasonal, friend-based).

• M nage player data persistence in MongoDB, including:

• P ayer profiles, teams, rosters

• M tch history and battle outcomes

• R nking and progression data

• E sure low-latency communication between clients and server during battles.

• C eate secure authentication and authorization APIs (JWT/OAuth2).

• I plement reward APIs tied to battle outcomes and leaderboard positions.

• D velop admin APIs for monitoring, analytics, and game balancing.

• W ite detailed API documentation for mobile team integration.

• M nitor, scale, and optimize backend systems for high concurrent player loads.

Required Skills & Qualifications

• S rong knowledge of JavaScript/TypeScript.

• H nds-on expertise in MERN stack (MongoDB, Express, React/React Native, Node.js).

• P oven experience with Socket.io/WebSockets for real-time communication.

• E perience in designing scalable RESTful/GraphQL APIs.

• U derstanding of game mechanics and multiplayer server architecture.

• P oficiency in MongoDB schema design and performance optimization.

• S rong grasp of security practices (rate limiting, API throttling, data validation, encryption).

• F miliarity with load balancing and cloud deployment (AWS, GCP, or Azure).

Preferred (Nice to Have)

• E perience with Elo/MMR ranking algorithms or custom matchmaking logic.

• F miliarity with microservices architecture and Docker/Kubernetes.

• K owledge of reward systems, battle pass integrations, and seasonal events.

• P ior work on real-time multiplayer mobile games.

Here’s a comprehensive list of APIs the developer would be expected to build for such a game 

1. Authentication & Player Profile APIs

2. Matchmaking APIs

3. Battle APIs

4. Leaderboard APIs

5. Ranking & Progression APIs

6. Rewards & Economy APIs

• 7. Admin & Analytics APIs