Backend & API engineering
Well-structured REST services with authentication, permissions, validation and clean data models, built to survive growth.
Engineering consultancy · India
Backend and cloud engineering that ships and scales.
Soni Technologies is a senior engineering practice for product companies. We build APIs, integrations, search and data pipelines on AWS, and we work with teams in Singapore, India and beyond.
5+ yrsBuilding production backends
50+Third-party integrations delivered
200k+Product catalogs searched at speed
8 hrs → 10 minBulk export, redesigned
What we do
Senior engineering across the backend stack
Hands-on delivery, not slideware. We take a problem from design through production and stay on to keep it reliable.
Integrations
Marketplaces, payments, ERPs, analytics and partner APIs wired in safely, with webhooks, retries, idempotency and monitoring.
AWS serverless & cloud
Event-driven architectures on Lambda, SQS and Step Functions, with CI/CD, containers and costs kept under control.
Search & data engineering
Fast search over large catalogs, index and query tuning, and import and export pipelines that don't fall over at volume.
AI & LLM engineering
Practical LLM features with measurable cost: prompt and context design, token reduction, and reliable structured outputs.
Technical leadership
Architecture and code reviews, sprint planning, delivery tracking, incident root-cause analysis and launch coordination.
Who we work with
Product teams across Singapore and India
We join as an embedded engineering partner and take ownership of outcomes.
Singapore
B2B product-data SaaS platform
Search, bulk import and export, supplier APIs, analytics and AI features for a catalog-management platform serving retail and e-commerce brands.
India · Southeast Asia
Growth and commerce-data company
Engineering consulting for a South and Southeast Asia technology company that unifies commerce data and applies AI to demand generation.
Selected work
Problems solved in production
A few representative results from client engagements. Client names are withheld by default.
up to 82×faster queries in selected scenarios
Singapore · B2B product-data SaaS
Catalog search moved from MongoDB to OpenSearch
Search over catalogs of 200,000+ products was slowing as data grew. We designed the OpenSearch index and mapping, migrated the data, and tuned the queries and the surrounding MongoDB indexes, which brought large queries from seconds down to near-instant.
8 hrs → <10 minfor a full bulk export
Singapore · B2B product-data SaaS
Bulk export rebuilt around serverless limits
Large exports were slow and hit AWS Lambda payload ceilings. We moved to a paginated, streamed export pipeline with files delivered through S3, so big exports finish in minutes and stay reliable.
~90% fewerLLM input tokens (≈47% lower cost)
Singapore · B2B product-data SaaS
AI feature costs cut by restructuring the context
An LLM-powered feature was sending far more context than it needed. Reworking the prompts and the data passed to the model cut input tokens by about 89.5% and overall LLM cost by about 46.6%, with output quality preserved.
Results are from real client work and are shown without naming the client. Details and references are available on request, with client consent.
How to work with us
Flexible engagement, clear ownership
Pick the shape that fits your team. We are comfortable working remotely and asynchronously, with time zone overlap for Singapore and India.
Dedicated engineer
A senior engineer embedded in your team.
- Monthly retainer
- Around 40 hours a week
- Joins your standups, tools and repos
Project delivery
A defined scope with a clear outcome.
- Fixed scope and timeline
- Milestone-based delivery
- Handover docs and support
Advisory & review
Short, focused expert input.
- Architecture and code reviews
- Performance and cost audits
- Hourly or day-rate
Discover
A short call to understand the problem, constraints and what success looks like.
Plan
A written scope, approach and estimate you can sign off on.
Build
Iterative delivery with frequent demos, tests and visible progress.
Run
Monitoring, documentation and support after launch so it stays healthy.
Tooling
The stack we work in every day
We are pragmatic about tools and pick the simplest option that fits your needs.
Languages & frameworks
- TypeScript
- Node.js
- NestJS
- Express
- REST
Data & search
- PostgreSQL
- MySQL
- MongoDB
- Redis
- OpenSearch
Cloud & delivery
- AWS Lambda
- SQS
- Step Functions
- S3
- CloudFront
- Docker
- CI/CD
About
A small practice, run by a senior engineer
Soni Technologies is a partnership firm based in Panipat, Haryana. It provides software development, backend engineering, API integration, cloud consulting and technology consultancy to clients in India and overseas.
The work is led by Sumit Kumar, Authorised Partner and principal consultant, a backend and cloud engineer with more than five years of experience. He has taken several products from first commit to production, delivered 50+ integrations, and led delivery on client launches. You work directly with the person doing the engineering.
We keep the team small on purpose, so projects get senior attention from start to finish.
- Firm
- Soni Technologies
- Type
- Partnership firm
- Location
- Panipat, Haryana, India
- GSTIN
- 06AFZFS3922B1ZS
- Working hours
- IST, overlapping SGT
- Invoicing
- INR or USD
Have something to build or fix?
Tell us what you're working on. You'll get a reply from the engineer who would do the work, usually within one business day.
admin@sonitechnologies.in