Full stack developer

Job Description

Wissen Technology is seeking an experienced C# .NET Developer to build and maintain applications related to streaming market data. This role involves developing message-based C#/.NET applications to process, normalize, and summarize large volumes of market data efficiently. The candidate should have a strong foundation in Microsoft .NET technologies and experience working with message-driven, event-based architecture. Knowledge of capital markets and equity market data is highly desirable.

Responsibilities

• Design, develop, and maintain message-based C#/.NET applications for processing real-time and batch market data feeds.
• Build robust routines to download and process data from AWS S3 buckets on a frequent schedule.
• Implement daily data summarization and data normalization routines.
• Collaborate with business analysts, data providers, and other developers to deliver high-quality, scalable market data solutions.
• Troubleshoot and optimize market data pipelines to ensure low latency and high reliability.
• Contribute to documentation, code reviews, and team knowledge sharing.
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Required Skills and Experience

• 5+ years of professional experience programming in C# and Microsoft .NET framework.
• Strong understanding of message-based and real-time programming architectures.
• Experience working with AWS services, specifically S3, for data retrieval and processing.
• Experience with SQL and Microsoft SQL Server.
• Familiarity with Equity market data, FX, Futures & Options, and capital markets concepts.
• Excellent interpersonal and communication skills.
• Highly motivated, curious, and analytical mindset with the ability to work well both independently and in a team environment.

Role Summary

We are seeking a Full-Stack Developer to build and secure features for our Therapy Planning Software (TPS), which integrates with RMS/RIS, EMR systems, devices (DICOM, Bluetooth, VR, robotics, FES), and supports ICD–ICF–ICHI coding. The role involves ~40% frontend and 60% backend development, with end-to-end responsibility for security across application layers.

Responsibilities

Frontend (40%)

1. Build responsive, accessible UI in React + TypeScript (or Angular/Vue).
2. Implement multilingual (i18n/l10n) and WCAG 2.1 accessibility standards.
3. Develop offline-capable PWAs for home programs.
4. Integrate REST/FHIR APIs for patient workflows, scheduling, and reporting.
5. Support features like voice-to-text, video capture, and compression.

Backend (60%)

1. Design and scale REST APIs using Python (FastAPI/Django).
2. Build modules for EMR storage, assessments, therapy plans, and data logging.
3. Implement HL7/FHIR endpoints and secure integrations with external EMRs.
4. Handle file uploads (virus scanning, HD video compression, secure storage).
5. Optimize PostgreSQL schemas and queries for performance.
6. Implement RBAC, MFA, PDPA compliance, edit locks, and audit trails.

Security Layer (Ownership)

1. Identity & Access: OAuth2/OIDC, JWT, MFA, SSO.
2. Data Protection: TLS, AES-256 at rest, field-level encryption, immutable audit logs.
3. Compliance: PDPA, HIPAA principles, MDA requirements.
4. DevSecOps: Secure coding (OWASP ASVS), dependency scanning, secrets management.
5. Monitoring: Logging/metrics (ELK/Prometheus), anomaly detection, DR/BCP preparedness.

Requirements

• Strong skills in Python (FastAPI/Django) and React + TypeScript.
• Experience with HL7/FHIR, EMR data, and REST APIs.
• Knowledge of OAuth2/JWT authentication, RBAC, audit logging.
• Proficiency with PostgreSQL and database optimization.
• Cloud deployment (AWS/Azure) and containerization (Docker/K8s) a plus.

Added Advantage

• Familiarity with ICD, ICF, ICHI coding systems or medical diagnosis workflows.

Success Metrics

• Deliver secure end-to-end features with clinical workflow integration.
• Pass OWASP/ASVS L2 security baseline.
• Establish full audit trail and role-based access across at least one clinical workflow.

Design, develop and maintain web-based services and applications using .Net Core/ASP.Net, C#, REST Web API, MS SQL Server, Entity Framework, and Dapper.  Developing highly optimized cross-browser and responsive web applications using HTML5, and CSS.  Manage the full technical life-cycle of web applications during each development phase including functional & technical design, implementation, testing, deployment and maintenance.  Developing high standard Web Applications based on functional requirements, UI/UX requirements, business logic and Web APIs.  Designing database tables, views, stored procedures, and functions to store and retrieve data most efficiently from SQL database.  Writing bug-free code with the highest coding standard.  Developing high-performance, highly secure and highly scalable Web Application.  Perform unit testing, troubleshooting, debugging and code reviews for robustness, including edge cases, usability, and reliability of the software.  Manage source code check-in, checkout, and merging code.  Taking accountability and the ability to work under pressure

Hands-on experience o of using Angular with version 7 or later o in consuming complex nested API. o in using state management (e.g. NGRX, RXJS). o in using caching. o of using component library framework integration (e.g. Angular Material). o in integrating with REST web services from the application. Knowing JSON is a must. o with Git compatible source control and working with a CI/CD pipeline.  Experience on AWS services will be added advantage.  Good experience in Standard Project Development Life Cycle.  Experience on Devextreme tools will be added advantage.  Ability/ready to work on advanced technologies like Node JS is an added advantage.  Knowledge / Experience of agile development methodologies.  Very good logical skills and problem-solving ability.  Quick learner and a good team player.  Should be able to work independently and with the team.

Roles and Responsibilities

We are seeking an experienced .NET -Tech Lead / Technical Architect, responsible for building, designing, and architecting .NET web-based applications using .Net Core, Web APIs, MVC, C#, etc. Must know React JS. Looking for an experienced resource who has worked in technologies agnostic approach. Resource should be responsible for providing solutions for technical issues to the team which can improve product quality. Having good exposure to Microservice Architecture Implementation. Will perform mixed contributor roles where 70% as IC (Individual contributor) and the rest 30% are in leading/helping/reviewing, designing, and documentation of modules.

Skills Must have

• Min 8+ years of experience in designing, Coding, deployment & developing web-based applications using the latest .NET technologies Net Core, Entity Framework, ASP.NET, C#, MVC, LINQ, Web API, etc.
• Candidate must have GitHub, open source contribution, or at least related demonstratable codes in his/her machine to showcase coding styles.
• Must Know React JS and worked with React JS before
• Sound understanding of technology & software development methodologies, especially in developing custom products for customers.
• Hands-on experience in the latest versions of .NET Technologies.
• Experience in Software Architecture such as CQRS, Domain Driven, and MVC.
• Must have excellent experience in JavaScript.
• Proven experience in creating & design RESTful APIs /Web APIs.
• Experience with MS SQL databases - writing queries, store procedures, tables, views, triggers, functions, and SQL Jobs.
• Should have good exposure in writing code for Microservices-based products.
• Hands-on experience in .Net Core and Microservices.
• Unit/Integration testing
• Message Queuing Tool: Azure Service Bus/Kafka/RabbitMQ (or any other messaging tool)
• Containerization Architecture: Docker/Kubernetes
• API Service Architecture: Enterprise-level designing and writing exposure in Microservices

• Azure Cloud platform
• CI/CD
• Agile methodology
• Azure DevOps

Selection Process

A take-home assignment is given to all shortlisted candidates and they must complete the assignment in a couple of days as much as possible to go to the next round. The second round is a verbal technical round where you will be asked technical and functional questions.

Our Ideal Candidate comes with :

• Willing to contribute and speak up with a view or opinion and add value by questioning and probing where necessary to ensure a thorough and robust solution.
• Drive high standards on quality, delivering solutions on time
• Candidate, in recent times, has been hands-on in full-stack enterprise technologies on the user interface, middleware frameworks, and database management. Has a deep understanding of multiple technology stacks/languages/tools and their pros/cons.
• Candidates must have Strong analytical and problem-solving skills.
• Strong interpersonal communication skills.
• Ability to lead initiatives and people toward common goals.
• Working knowledge of systems infrastructure
• Good to have experience in working on a large complexed product & very large scalable applications or websites with huge data sizes.
• Excellent oral and written communication, presentation, and analytical skills roles and Responsibilities

PS: It is permanent Work From Home opportunity working with a UK Govt aided company.

Area of professional exposure (functional/technical skills) :

· Hands-on experience with Google Cloud Platform (GCP) Services (Data Flow/Cloud Run/Big Query/Cloud SQL Server/GCS etc.)

· Experience in deploying to GCP environments (Cloud Run/CaaS/OpenShift/Containerization)

· Experience with Continuous Integration/Continuous Delivery tools and pipelines – Tekton, Terraform and Jenkins

· Experience with Java/J2EE frameworks, Web development and REST APIs/microservices development (Spring Boot, Spring Cloud)

· Good exposure to GCP application developments.

· Hands-on experience with Angular (front-end development)

· Experience in using build tools like Gradle, Maven and Ant etc.

· Experience with GitHub or equivalent source control repositories

· Experience in developing data processing tasks using Spark/PySpark

· Good working knowledge of relational databases like MS SQL, Oracle etc.

Technical knowledge

• Design and implement software components using up-to-date technologies and best practices.
• Comprehensive understanding of the REST architecture.
• Strong working experience in Angular,HTML5, CSS3
• Strong working experience in Container Orchestration Management on-premise and public cloud (Docker, Kubernetes or similar)
• Overall understanding of the Service Oriented Architecture
• Experience with widely used design patterns.
• Should possess prior experience in building distributed multi-tier applications with single sign-on.
• Continuous Integration (CI) and Automated Deployment on AWS/Azure
• Static and dynamic code quality analysis
• Should understand the dynamics of the full-stack development and guide junior team members.
• Experience in developing enterprise-scale software platforms
• Should have hands-on experience in managing releases.
• Build applications using Azure Services and deploy them on Azure Infrastructure.