11 of 11 Contract Legacy Systems Jobs in London

Contract Principal Software Architect

Hiring Organisation
Spectrum It Recruitment Limited
Location
Uxbridge, London, United Kingdom
Employment Type
Contract, Work From Home
integrations. Define clear service boundaries, ownership models and integration patterns . Support engineering teams in delivering scalable, maintainable and well-structured solutions. Assess existing systems and identify opportunities to simplify, consolidate and modernise platform capabilities. Support the evolution of legacy systems towards agreed target-state architectures … through pragmatic, incremental change. Make and guide technical decisions around distributed systems, APIs, integrations, data and cloud architecture . Ensure security, resilience, observability, performance and scalability are incorporated into solution designs. Identify architectural risks, technical debt and platform constraints, and establish appropriate mitigation strategies. Provide technical review and architectural ...

Smart Contract Developer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
requirements into scalable, maintainable product logic. Implement interest, accruals, repayments, fees, payment allocation, balances and lifecycle events. Support product migration from legacy systems to Vault. Collaborate with Product, Business Analysis, Architecture and Engineering teams. Develop automated tests covering business rules, edge cases and regression scenarios. Participate … reviews and technical design discussions. Investigate defects and support functional, integration, migration and production testing. Validate and reconcile financial calculations between legacy systems and Vault. Support releases and produce technical documentation. Follow engineering, security, governance and regulatory standards. Essential Skills & Experience Strong software development experience, preferably Python ...

IT Data Analyst / IT Data Migration Specialist

Hiring Organisation
Adecco
Location
Havering, London, Havering atte Bower, United Kingdom
Employment Type
Contract, Temporary
Salary
£41.31 - £54.22/hour Umbrella, PAYE, Holiday, Pensions Sch
initial discovery phase. Analyse existing datasets and assess data quality. Develop data mapping and migration strategies. Execute data migration from legacy systems to a new cloud platform. Provide recommendations on migration approach, risks, and timelines. Support successful implementation and completion of the migration project. Map the Ocella … systems. Proven ability in data mapping , including matching and transforming data between source and target systems. Experience migrating data from legacy systems to cloud-based platforms . Ability to assess data quality, identify issues, and recommend migration approaches. Desirable Skills Previous experience with iDocs Cloud migrations . ...

IT Data Analyst / IT Data Migration Specialist

Hiring Organisation
Adecco
Location
Havering-atte-bower, Essex, United Kingdom
Employment Type
Contract
Contract Rate
GBP 41 - 54 Hourly
initial discovery phase. Analyse existing datasets and assess data quality. Develop data mapping and migration strategies. Execute data migration from legacy systems to a new cloud platform. Provide recommendations on migration approach, risks, and timelines. Support successful implementation and completion of the migration project. Map the Ocella … systems. Proven ability in data mapping , including matching and transforming data between source and target systems. Experience migrating data from legacy systems to cloud-based platforms . Ability to assess data quality, identify issues, and recommend migration approaches. Desirable Skills Previous experience with iDocs Cloud migrations . ...

Smart Contract Developer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £625/day
practices. Investigate and resolve defects identified during functional, integration, migration and production testing. Support reconciliation and validation of financial calculations between legacy systems and Vault. Analyse existing product behaviour and legacy-system rules when supporting product migration. Contribute to technical design discussions and identify potential … behaviour with both technical and non-technical stakeholders. Highly Desirable Experience implementing Lending and/or Savings products. Experience migrating financial products from legacy core banking platforms onto Thought Machine Vault. Understanding of Lending and Savings concepts, including: Interest accrual and application. Repayment schedules. Fixed and variable interest ...

Java Developer - Active SC, Java, Oracle WebLogic

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400.0 - £425.0 per day + up to £425pd (Inside IR35)
Java Developer Active SC Clearance is essential; NPPV3 would be advantageous Strong expertise in Java 11+ with experience supporting legacy systems Proven experience with Oracle WebLogic 11gR1 or similar Experience developing and supporting PL/SQL Hands-on experience with ElasticSearch development and support Nice to have ...

API / Integration Developer (SC Cleared)

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day Inside IR35
public sector technology programme on an initial 7-month contract. This is a hands-on development role focused on delivering bespoke integrations between internal systems, cloud platforms and third-party applications. The ideal candidate will have strong experience across Azure and C#/.NET , alongside a proven background … strong integration experience using Python or other comparable programming languages will also be considered. Key Responsibilities Design and develop bespoke integration solutions between multiple systems and platforms. Develop and maintain integrations with third-party applications and services. Build and support cloud-based solutions using Microsoft Azure . Develop integration ...

Systems Data Analyst

Hiring Organisation
Computappoint
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£370 - £420/annum
Systems Data Analyst | Inside Contract | Hybrid Rate: £350 - £420 per day Contract Duration: Initial 6 Months Hybrid: 40% or less onsite a week (London Industry: Professional Services/Highly Regulated Environment Job Summary: Seeking an experienced Systems Data Analyst to support a major technology transformation programme within … uncover undocumented functionality and data relationships. Contribute to data governance initiatives and promote best practice across projects. Qualifications & Requirements: Demonstrable experience within Data Analyst, Systems Analyst or Database-focused roles. Strong SQL skills and confidence analysing data held across diverse platforms. Solid understanding of data structures, modelling techniques ...

Kotlin Developer

Hiring Organisation
Alexander Ash Consulting Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Memorystore, Artifact Registry and Cloud Logging Strong CI/CD and SDLC experience within regulated or enterprise environments Comfortable supporting high-availability, production-critical systems Role & Responsibilities The team is developing a new Real Time issuance platform to replace a Legacy bookbuilding system. The platform supports around ...

Senior Python Developer | 6 month contract

Hiring Organisation
Akkodis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £700/day (Inside IR35)
teams, and we're looking for experienced Python Developers to help build the next generation of internal platforms. This isn't about maintaining legacy systems. You'll be joining projects focused on modernising how critical banking technology is built, tested and delivered. You'll join one of several … technical problems using your Python development experience within Financla Services/banking. applications If you have exposure to Regulatory Technology, Trading or Front Office systems, Security engineering or GitHub Copilot or AI-assisted development, all the better! You don't need to be an AI expert, but you should ...

SAP Payroll/HCM Consultant

Hiring Organisation
Randstad Digital
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£380 - £420 per day + Negotiable
instrumental in creating new Legal Entities (LEs) and enabling separate end-to-end (E2E) payroll runs for distinct business groups within our legacy system. If you have a deep understanding of ECC Payroll, Time Management, and cross-functional integrations, this is an excellent opportunity to take ownership … Blueprint document and local regulatory/compliance standards. Integration Management: Ensure seamless data flow and integration between Workday (WD), General Ledger (GL), banking systems, and HR/Time platforms. Testing & Quality Assurance: Design E2E test scenarios, define expected results, and guide data mining efforts to ensure flawless payroll execution. ...