Senior Software Engineer (Benchmark & Index Management)

Synechron; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Synechron is seeking a Senior Software Engineer for Benchmark & Index Management in London. The role focuses on building scalable, secure index systems within a hybrid work model.

You will own end-to-end software delivery with a strong emphasis on performance, automation, and collaboration across business and engineering teams. You will leverage C# .NET, REST APIs, and microservices, with extensive exposure to AWS services and data-intensive processing.

Qualifications

• Over 8+ years proven experience as a Software Developer, architecting and delivering large-scale data-intensive applications.
• Solid experience in database modelling, performance tuning, and optimization.
• Proficiency with SQL Server stored procedures and T‑SQL.
• Experience building RESTful APIs and microservices in C# .NET.
• Strong knowledge of AWS services (EC2, EKS, Lambda, SQS/SNS).
• Familiarity with CI/CD pipelines, unit tests, and BDD tooling.

Responsibilities

• Lead development through high-quality software design and architecture.
• Identify priorities and drive tasks across the SDLC.
• Develop scalable tools and applications with clean, efficient code.

Skills

C# .NET

REST APIs

Microservices

AWS Cloud

SQL Server

Data-intensive apps

Java SpringBoot

Python integration

Tools

Kubernetes

Git

CI/CD

PostgreSQL

Job description

Job Role: Senior Software Engineer (Benchmark & Index Management)

Job Location: London, UK

Experience: Mid-Senior Level

Work Type: Hybrid / Open for full-time & Contract

About Company:

At Synechron, we believe in the power of digital to transform businesses for the better. Our global consulting firm combines creativity and innovative technology to deliver industry-leading digital solutions. Synechron’s progressive technologies and optimization strategies span end-to-end Artificial Intelligence, Consulting, Digital, Cloud & DevOps, Data, and Software Engineering, servicing an array of noteworthy financial services and technology firms. Through research and development initiatives in our FinLabs we develop solutions for modernization, from Artificial Intelligence and Blockchain to Data Science models, Digital Underwriting, mobile-first applications and more. Over the last 20+ years, our company has been honored with multiple employer awards, recognizing our commitment to our talented teams. With top clients to boast about, Synechron has a global workforce of 14,700+ and has 55 offices in 20 countries within key global markets. For more information on the company, please visit our website or LinkedIn community.

Diversity, Equity, and Inclusion

Diversity & Inclusion are fundamental to our culture, and Synechron is proud to be an equal opportunity workplace and an affirmative-action employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We strongly believe that a diverse workforce helps build stronger, successful businesses as a global company. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We empower our global workforce by offering flexible workplace arrangements, mentoring, internal mobility, learning and development programs, and more.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.

Key Functions:

As a Senior Software Engineer in Benchmark & Index Management the individual will be responsible for developing high quality, scalable software, designing and building robust, secure and efficient systems in the delivery of key index systems required for strategic business growth.

The candidate will be required to provide technical expertise, ownership and responsibility in the end-to-end software delivery lifecycle.

Key Responsibilities:

Contributes and leads development through high-quality software design and architecture.

Identifies, prioritises, and performs tasks in the software development lifecycle.

Develops tools and applications by producing clean, eAicient and scalable code.

Advocate for and implement engineering guidelines for excellence, including automation, code reviews, continuous integration/continuous delivery (CI/CD), and performance tuning

Ensures high quality, reliable products using unit, integration and BDD test suites

Collaborates closely with business and engineering partners to deliver products, services, improvements and solutions to meet customer needs and align with goals of the business and engineering lines.

Communicates with clarity, precision, and influence, presenting complex information in a clear and concise format that is appropriate for the audience.

Drive a culture of engineering excellence through mentorship, peer reviews, and promoting standard methodologies in software design and development

Continuously optimize systems for performance, scalability, and security in a fast-paced, production environment.

Experience & Skills:

Over 8+ years proven experience as a Software Developer, architecting, developing and testing large-scale data intensive applications in an enterprise environment.

Solid Prior experience of Database modelling / design, performance tuning, and optimization.

Thorough knowledge of application programming for data intensive applications on SQL Server using Stored Procedures / tSQL.

Proficiency in C# .NET, including designing and implementing RESTful APIs and microservices.

Strong understanding of AWS cloud infrastructure and native services - AWS EC2, EKS, Lambda, SQS, SNS, AWS Glue Etc.

Experience with unit testing frameworks (e.g. MSTest, tSQLt) and Behaviour-Driven Development (BDD) tools (e.g. Cucumber, Mocha).

Proven ability to deliver high-quality, maintainable code and systems.

Extensive experience in software engineering principles, CI/CD tools and automation processes.

Strong analytical skills and a problem-solving mentality.

Some experience of Business and Technical Analysis, Quality Assurance, Delivery Management, and/or Emerging Technology and Governance.

Experience working in an agile environment with a focus on collaboration, automation, and continuous improvement.

Experience with Financial Markets in Equities and / or Fixed Income.

Prior experience with Java (including SpringBoot) and / or Python for cross-platform integrations, greenfield and legacy systems is hugely advantageous.

Familiarity with Sybase and PostgreSQL, including database management and optimization.

Key Attributes:

Articulate, energetic person able to work alone or as part of a team.

Excellent attention to detail but an ability to think laterally to solve business problems.

Excellent interpersonal skills, both written and verbal, with the ability to work effectively with both technical and non-technical collaborators.

A passion for continuous learning and improving software engineering practices.

Ability to learn quickly, work under pressure and to tight deadlines.

Demonstrated ability to mentor and grow junior engineers.

Creative, results driven, self-motivated and solutions oriented.