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Senior Full Stack Engineer

Job in Sheffield, South Yorkshire, S5, England, UK
Listing for: Vallum Associates Limited
Full Time position
Listed on 2026-01-11
Job specializations:
  • IT/Tech
    Systems Engineer, Cloud Computing
Job Description & How to Apply Below

Job Title :
Senior Full Stack Engineer

Location :
Hybrid
- Sheffield, UK

Duration : 6months+ Contract Inside IR35

Major Responsibilities

Deliver engineering expertise for our Future State Architecture, producing best in class payment processing capabilities

Deliver high quality code artefacts that set the example for the team, ensuring quality gates are surpassed and robust test scripts are included

Focus on delivering highly available, highly resilient software and service capability

Participate in a wider delivery team providing design and development of the new capabilities

Support transformation of the current payment estate, with laser focus on modernization and adoption of cloud-based technology

Major Accountabilities

Set the level expected for software delivery within the team, leading by example

Serve as expert in area of responsibility, identifies process improvements and problem prevention, and advises department and management of relevant information as appropriate

Provides analysis and solutions to technical and business issues

Understand and apply technology and corporate vision setting direction on implementation.

Maintain awareness of business and technology strategies and implements technical alternatives and strategies to gain competitive advantage

Maintains the complex technical infrastructure of assigned area to meet the business requirements.

Provides technical solutions to business problems, technical leadership and direction to management.

Remain current on technical and professional advances and business strategies regarding area of responsibility

Resolve architectural or development blockers raised

Partner with Dev Ops team to enable automated infrastructure delivery, Dev Sec Ops  value streams are executed and CI / CD pipelines to deploy services

Initiate analysis for complex problems and issues, determine technical alternatives, analyse vendor solutions and negotiate contracts, and develop appropriate standards for technology application.

Provide technical leadership and consultation to project team members as directed by the project manager

Initiate and conduct feasibility studies of new and modified operational procedures.

For large systems, prepare cost / benefit analyses, functional and detail specifications.

Provide direct guidance in planning, designing, programming, documentation and implementation of the systems

Perform reviews of new and existing systems to ensure operational integrity and accomplishment of stated objectives

Design, code, test, debug and document programs as required

Provide architecture guidance to developers based on best practices and in alignment with global standards

Ensuring compliance with all relevant controls and standards

Keep up-to-date and have expertise on current tools, technologies and areas like cyber security and regulations pertaining to aspects like data privacy, consent, data residency etc. that are applicable

Qualifications

Knowledge & Experience / Qualifications

Bachelors Degree required in Computer Science, Engineering or related majors

Minimum of 15 years applied experience as an API engineer

Strong experience in API designing and creating architectural artefacts such as gap analysis, low level designs, data models etc.

More than 10 years of engineering background in back-end microservices application development, application security and authentication development, cache and middleware

More than 10 years experience programming in Java and ideally Go and Rust

Expertise in JVM tuning and diagnostic for application troubleshooting and performance-optimization

Expertise in distributed system design including microservices, Springboot

Expertise in Docker, k8s, service mesh

Expertise in Kafka, the incumbent should be able to build and configure a cluster and develop software to produce and consume to / from the cluster

Expertise in monitoring and observability technologies :
Splunk, Grafana, Prometheus, Jaeger, Kiali, Open Telemetry

Expertise in cloud and Dev Ops, familiar to network (VPC) and firewall on cloud, identity and access management, cloud delivery including sizing and costing

Solid knowledge on infrastructure like Linux OS, networking, storage, network load-balancing, Kubernetes CNI

Expert-level SQL coding abilities is preferred.

Understanding of distributed Databases

Experience of working in a financial institution, ideally in payments

Ability to work independently and think out of the box

The passion and ability to lead / motivate and develop technologist, including mentoring and coaching.

Superior listening skills, ability to learn quickly, and willing to accept accountability for company and individual success

Extensive critical thinking skills for problem identification and solution recommendation

Exceptional team player that can lead others in demonstrating initiative and sound business judgment and is interested in expanding skills and growing professionally

Highly flexible, set priorities and meet deadlines in a changing environment

Excellent written and verbal…

Position Requirements
10+ Years work experience
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