diff --git a/src/main/java/org/prebid/server/bidder/colossus/ColossusBidder.java b/src/main/java/org/prebid/server/bidder/colossus/ColossusBidder.java
index 5302825cd36..7b1c4101306 100644
--- a/src/main/java/org/prebid/server/bidder/colossus/ColossusBidder.java
+++ b/src/main/java/org/prebid/server/bidder/colossus/ColossusBidder.java
@@ -1,20 +1,143 @@
 package org.prebid.server.bidder.colossus;
 
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.iab.openrtb.request.BidRequest;
 import com.iab.openrtb.request.Imp;
-import org.prebid.server.bidder.OpenrtbBidder;
+import com.iab.openrtb.response.Bid;
+import com.iab.openrtb.response.BidResponse;
+import com.iab.openrtb.response.SeatBid;
+import io.vertx.core.http.HttpMethod;
+import org.apache.commons.collections4.CollectionUtils;
+import org.prebid.server.bidder.Bidder;
+import org.prebid.server.bidder.model.BidderBid;
+import org.prebid.server.bidder.model.BidderError;
+import org.prebid.server.bidder.model.HttpCall;
+import org.prebid.server.bidder.model.HttpRequest;
+import org.prebid.server.bidder.model.Result;
+import org.prebid.server.exception.PreBidException;
+import org.prebid.server.json.DecodeException;
 import org.prebid.server.json.JacksonMapper;
+import org.prebid.server.proto.openrtb.ext.ExtPrebid;
 import org.prebid.server.proto.openrtb.ext.request.colossus.ExtImpColossus;
+import org.prebid.server.proto.openrtb.ext.response.BidType;
+import org.prebid.server.util.HttpUtil;
 
-public class ColossusBidder extends OpenrtbBidder<ExtImpColossus> {
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class ColossusBidder implements Bidder<BidRequest> {
+
+    private static final TypeReference<ExtPrebid<?, ExtImpColossus>> COLOSSUS_EXT_TYPE_REFERENCE =
+            new TypeReference<>() {
+            };
+
+    private final String endpointUrl;
+    private final JacksonMapper mapper;
 
     public ColossusBidder(String endpointUrl, JacksonMapper mapper) {
-        super(endpointUrl, RequestCreationStrategy.REQUEST_PER_IMP, ExtImpColossus.class, mapper);
+        this.endpointUrl = HttpUtil.validateUrl(Objects.requireNonNull(endpointUrl));
+        this.mapper = Objects.requireNonNull(mapper);
     }
 
     @Override
-    protected Imp modifyImp(Imp imp, ExtImpColossus impExt) {
-        return imp.toBuilder()
-                .tagid(impExt.getTagId())
+    public Result<List<HttpRequest<BidRequest>>> makeHttpRequests(BidRequest bidRequest) {
+        final List<HttpRequest<BidRequest>> requests = new ArrayList<>();
+        final List<BidderError> errors = new ArrayList<>();
+
+        for (Imp imp : bidRequest.getImp()) {
+            try {
+                final ExtImpColossus extImpColossus = parseImpExt(imp);
+                final Imp modifiedImp = modifyImp(imp, extImpColossus.getTagId());
+                requests.add(makeRequest(bidRequest, modifiedImp));
+            } catch (PreBidException e) {
+                errors.add(BidderError.badInput(e.getMessage()));
+            }
+        }
+
+        return Result.of(requests, errors);
+    }
+
+    private ExtImpColossus parseImpExt(Imp imp) {
+        try {
+            return mapper.mapper().convertValue(imp.getExt(), COLOSSUS_EXT_TYPE_REFERENCE).getBidder();
+        } catch (IllegalArgumentException e) {
+            throw new PreBidException(e.getMessage());
+        }
+    }
+
+    private static Imp modifyImp(Imp imp, String tagId) {
+        return imp.toBuilder().tagid(tagId).build();
+    }
+
+    private HttpRequest<BidRequest> makeRequest(BidRequest bidRequest, Imp imp) {
+        final BidRequest outgoingRequest = bidRequest.toBuilder().imp(Collections.singletonList(imp)).build();
+
+        return HttpRequest.<BidRequest>builder()
+                .method(HttpMethod.POST)
+                .headers(HttpUtil.headers())
+                .uri(endpointUrl)
+                .body(mapper.encodeToBytes(outgoingRequest))
+                .payload(outgoingRequest)
                 .build();
     }
+
+    @Override
+    public Result<List<BidderBid>> makeBids(HttpCall<BidRequest> httpCall, BidRequest bidRequest) {
+        final BidResponse bidResponse;
+        try {
+            bidResponse = mapper.decodeValue(httpCall.getResponse().getBody(), BidResponse.class);
+        } catch (DecodeException e) {
+            return Result.withError(BidderError.badServerResponse(e.getMessage()));
+        }
+
+        final List<BidderError> errors = new ArrayList<>();
+        final List<BidderBid> bids = extractBids(httpCall.getRequest().getPayload(), bidResponse, errors);
+
+        return Result.of(bids, errors);
+    }
+
+    private static List<BidderBid> extractBids(BidRequest bidRequest,
+                                               BidResponse bidResponse,
+                                               List<BidderError> errors) {
+
+        if (bidResponse == null || CollectionUtils.isEmpty(bidResponse.getSeatbid())) {
+            return Collections.emptyList();
+        }
+
+        return bidResponse.getSeatbid().stream()
+                .filter(Objects::nonNull)
+                .map(SeatBid::getBid)
+                .filter(Objects::nonNull)
+                .flatMap(Collection::stream)
+                .filter(Objects::nonNull)
+                .map(bid -> makeBidderBid(bid, bidRequest.getImp(), bidResponse.getCur(), errors))
+                .filter(Objects::nonNull)
+                .collect(Collectors.toList());
+    }
+
+    private static BidderBid makeBidderBid(Bid bid, List<Imp> imps, String currency, List<BidderError> errors) {
+        try {
+            return BidderBid.of(bid, resolveBidType(bid.getImpid(), imps), currency);
+        } catch (PreBidException e) {
+            errors.add(BidderError.badServerResponse(e.getMessage()));
+            return null;
+        }
+    }
+
+    private static BidType resolveBidType(String impId, List<Imp> imps) {
+        for (Imp imp : imps) {
+            if (Objects.equals(impId, imp.getId())) {
+                if (imp.getBanner() == null && imp.getVideo() != null) {
+                    return BidType.video;
+                }
+                return BidType.banner;
+            }
+        }
+
+        throw new PreBidException(String.format("Failed to find impression for ID: %s", impId));
+    }
 }